vq35de-t stock internals with forged rods??
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From: Yes
vq35de-t stock internals with forged rods??
Hi,
I drive an 04 350z and share the same vq35de engine. I was wondering if any of you could enlighten me on flaws on my plan to piece together a low compression vq35de for FI....
Ive been trying to piece together a rear mount turbo (he351cw) on the stock 2.25"ish piping with the piping ceramic coated with a UTEC or Haltech but on stock internals...and now Im at the point where I have to order the turbocharger and UTEC
My questions are ( I searched, found some of the questions previously asked but I didnt find the answers):
Can I use only forged rods and slightly lower compression to push 500whp on the stock internals on 94 octane?
Cometic makes custom sized gaskets... I was thinking a 2-3mm gasket with the strongest studs I could find. The timing belt has a tensioner so this should work right?
Would you know the limit of the vq35de if forged rods are used along with a slightly lower compression, like 9.7:1?
What are the common components to cause engine failure at high boost? rods...then the high compression knock issue and then?
TBH building a forged vq35de seems like a waste of money when I can trade it in put the same money on top and easily get a 370z, G37, 1994 R33 GTR (RHD, high on insurance), 1993 Supra TT (RHD)
ALSO, Ive read about the vq32de, destroked version of the vq35 using vq30 internals...so I was thinking if using forged vq30 rods would be able to support the vq35de at like, say.... 18psi??
Im guessing I would lose roughly (.3/3.5)x 274ft.lbs = 23.4ft.lbs of torque? but a faster and higher revving engine....i always thought the vq revs slow...except the rev match on the 370z
Theres a 500whp+ (560 i think) vq35de on stock internals but on 116 octane.
I reduced my car`s weight to about 1370kg...its a little faster but im still not satisfied with it... my options are stay NA and strip the car, rear mount he351cw turbo w/UTEC, LS block build then swap in, 2JZ swap in and then build, vq37vhr build and then swap in or stay fairly stock trade in and get something faster
Thanks for tech.help btw....
I drive an 04 350z and share the same vq35de engine. I was wondering if any of you could enlighten me on flaws on my plan to piece together a low compression vq35de for FI....
Ive been trying to piece together a rear mount turbo (he351cw) on the stock 2.25"ish piping with the piping ceramic coated with a UTEC or Haltech but on stock internals...and now Im at the point where I have to order the turbocharger and UTEC
My questions are ( I searched, found some of the questions previously asked but I didnt find the answers):
Can I use only forged rods and slightly lower compression to push 500whp on the stock internals on 94 octane?
Cometic makes custom sized gaskets... I was thinking a 2-3mm gasket with the strongest studs I could find. The timing belt has a tensioner so this should work right?
Would you know the limit of the vq35de if forged rods are used along with a slightly lower compression, like 9.7:1?
What are the common components to cause engine failure at high boost? rods...then the high compression knock issue and then?
TBH building a forged vq35de seems like a waste of money when I can trade it in put the same money on top and easily get a 370z, G37, 1994 R33 GTR (RHD, high on insurance), 1993 Supra TT (RHD)
ALSO, Ive read about the vq32de, destroked version of the vq35 using vq30 internals...so I was thinking if using forged vq30 rods would be able to support the vq35de at like, say.... 18psi??
Im guessing I would lose roughly (.3/3.5)x 274ft.lbs = 23.4ft.lbs of torque? but a faster and higher revving engine....i always thought the vq revs slow...except the rev match on the 370z
Theres a 500whp+ (560 i think) vq35de on stock internals but on 116 octane.
I reduced my car`s weight to about 1370kg...its a little faster but im still not satisfied with it... my options are stay NA and strip the car, rear mount he351cw turbo w/UTEC, LS block build then swap in, 2JZ swap in and then build, vq37vhr build and then swap in or stay fairly stock trade in and get something faster
Thanks for tech.help btw....
You need to research more. It's a good thing you came here but also bad because more info is on the 350z forced induction forums. They would roast you over there however, you may have a goal of 500 but why? Anyway you can go to that forum and look up Streetzlegend, he has a build thread there, I think he has one here also. Timing belt tensioner?? Sigh... You can look at alot of builds on the 350z sight to see how they built their's and what hp they are at, there are many different factors though such as build quality, build components, and tuning, and these all add up. Good luck with it.
Ok i think u should be asking these ?s on MY350Z forum,So how do u plan on running lower compression without some custom pistons,and rods are not the failing part of build engine its the bearings,oil consumption and if u r opening ur block u might as well get arp head and main,yes u should also get some better pistons then stock with coated sides helps the oil consumption that occurs with these piston rings and u should be good for 600lbs of torque,and its not the horsepower that harm these alumnainun blocks its going over 600lbs of torque so u can ran 800hp and ur still good.and a top of the line turner these engines are not for everybody to tune,and u should be safe.
Last edited by Max streets; Jun 9, 2013 at 07:35 PM.
Thread Starter
Newbie - Just Registered
Joined: Feb 2013
Posts: 9
From: Yes
I did ask it on nico...one guy helped....that was about it...
The knowledge pools for maxima and 350z people are different....for ex: most of 350z forum people dont know holset turbos can be used for vq35de
anyway,
Ok... what do I research? Unless I have a lab to work in or some research papers to read, my only option left is to ask people if they know based on their own experiences....
Other builds did not have to mess with the timing belt tensioner as they did not use supersized gaskets...
Yes, thats why I want the he351cw... But im having trouble finding one priced good. Theres a lot of HX-35 and HX-40...very few he351cw on ebay
25psi?!? forged build??
Im located in Ontario, Canada. Shipping and customs would be $100-200. Say we negotiate down to $450, you would only get $250-350...probably better off selling them to someone else....o and theres also Canadian customs along with shipping...so taxes and brokerage charges if the item appears to be worth more than $20 on inspection
same issue with shipping to Canada...
you mean like one of these that are $700 new with warranty...?
http://www.ebay.ca/itm/Precision-57m...vxp=mtr&_uhb=1
The knowledge pools for maxima and 350z people are different....for ex: most of 350z forum people dont know holset turbos can be used for vq35de
anyway,
You need to research more. It's a good thing you came here but also bad because more info is on the 350z forced induction forums. They would roast you over there however, you may have a goal of 500 but why? Anyway you can go to that forum and look up Streetzlegend, he has a build thread there, I think he has one here also. Timing belt tensioner?? Sigh... You can look at alot of builds on the 350z sight to see how they built their's and what hp they are at, there are many different factors though such as build quality, build components, and tuning, and these all add up. Good luck with it.
Other builds did not have to mess with the timing belt tensioner as they did not use supersized gaskets...
25psi?!? forged build??
Im located in Ontario, Canada. Shipping and customs would be $100-200. Say we negotiate down to $450, you would only get $250-350...probably better off selling them to someone else....o and theres also Canadian customs along with shipping...so taxes and brokerage charges if the item appears to be worth more than $20 on inspection
you mean like one of these that are $700 new with warranty...?
http://www.ebay.ca/itm/Precision-57m...vxp=mtr&_uhb=1
Most questions about boost can be asked on google and it will bring up many different forum links. I said this because you get the general knowledge of boost components and your engine and go from there. For example, our engines don't have timing belts. If you go on the my350z.com forced induction forum you can see many builds there and just reading the the build threads and stickies will give you quite a bit of general knowledge. You can see what they used and sometimes they explain why they went with what they did, all this teaches you as you watch others. Another example is low compression is no longer the requirement since alot more people are going with e-85 builds. Read, search and read some more, it will help you out then for the more difficult questions you can come back and ask.
seems like a lot of work (all this custom stuff no one has really done) to avoid doing a little bit of work (just get pistons).
people crack ring lands all the time, why would you skimp on pistons anyways (i assume you're doing it to save money, not because you think the pistons are plenty strong.)
I would stick with the stock components entirely and be happy with like 450whp/tq, or just do pistons and rods.
450whp/tq you're already going to be at extreme risk of breaking the trans. in fact you probably will. higher than that and you will just break it faster. unless of course you're planning on building it up, in which case you apparently have plenty of money, in which case why would you skimp on pistons in the first place?
people crack ring lands all the time, why would you skimp on pistons anyways (i assume you're doing it to save money, not because you think the pistons are plenty strong.)
I would stick with the stock components entirely and be happy with like 450whp/tq, or just do pistons and rods.
450whp/tq you're already going to be at extreme risk of breaking the trans. in fact you probably will. higher than that and you will just break it faster. unless of course you're planning on building it up, in which case you apparently have plenty of money, in which case why would you skimp on pistons in the first place?
Hi,
I drive an 04 350z and share the same vq35de engine. I was wondering if any of you could enlighten me on flaws on my plan to piece together a low compression vq35de for FI....
Ive been trying to piece together a rear mount turbo (he351cw) on the stock 2.25"ish piping with the piping ceramic coated with a UTEC or Haltech but on stock internals...and now Im at the point where I have to order the turbocharger and UTEC
Why you wanna use an OLD AZZ ANCIENT UTEC and you can use Uprev? Get rid of that stock piping and go full 3" you going to choke the car up.
My questions are ( I searched, found some of the questions previously asked but I didnt find the answers):
Can I use only forged rods and slightly lower compression to push 500whp on the stock internals on 94 octane?
NO!!
Cometic makes custom sized gaskets... I was thinking a 2-3mm gasket with the strongest studs I could find. The timing belt has a tensioner so this should work right?
Would you know the limit of the vq35de if forged rods are used along with a slightly lower compression, like 9.7:1?
They say about 600whp then you should start thinking sleeving the block
What are the common components to cause engine failure at high boost? rods...then the high compression knock issue and then?
IGNORANCE & STUPIDITY
TBH building a forged vq35de seems like a waste of money when I can trade it in put the same money on top and easily get a 370z, G37, 1994 R33 GTR (RHD, high on insurance), 1993 Supra TT (RHD)
Then why you asking us questions if you feel like this???
ALSO, Ive read about the vq32de, destroked version of the vq35 using vq30 internals...so I was thinking if using forged vq30 rods would be able to support the vq35de at like, say.... 18psi??
Im guessing I would lose roughly (.3/3.5)x 274ft.lbs = 23.4ft.lbs of torque? but a faster and higher revving engine....i always thought the vq revs slow...except the rev match on the 370z
Theres a 500whp+ (560 i think) vq35de on stock internals but on 116 octane.
Build the block right and stop trying to be cheap
I reduced my car`s weight to about 1370kg...its a little faster but im still not satisfied with it... my options are stay NA and strip the car, rear mount he351cw turbo w/UTEC, LS block build then swap in, 2JZ swap in and then build, vq37vhr build and then swap in or stay fairly stock trade in and get something faster
KG where the hell you from? Canada? Get the hell out with that UTEC trash...you have Uprev!!!!
Seems like you dont know WTF you wanna do. Figure that out then come back and ask questions.....
Thanks for tech.help btw....
I drive an 04 350z and share the same vq35de engine. I was wondering if any of you could enlighten me on flaws on my plan to piece together a low compression vq35de for FI....
Ive been trying to piece together a rear mount turbo (he351cw) on the stock 2.25"ish piping with the piping ceramic coated with a UTEC or Haltech but on stock internals...and now Im at the point where I have to order the turbocharger and UTEC
Why you wanna use an OLD AZZ ANCIENT UTEC and you can use Uprev? Get rid of that stock piping and go full 3" you going to choke the car up.
My questions are ( I searched, found some of the questions previously asked but I didnt find the answers):
Can I use only forged rods and slightly lower compression to push 500whp on the stock internals on 94 octane?
NO!!
Cometic makes custom sized gaskets... I was thinking a 2-3mm gasket with the strongest studs I could find. The timing belt has a tensioner so this should work right?
Would you know the limit of the vq35de if forged rods are used along with a slightly lower compression, like 9.7:1?
They say about 600whp then you should start thinking sleeving the block
What are the common components to cause engine failure at high boost? rods...then the high compression knock issue and then?
IGNORANCE & STUPIDITY
TBH building a forged vq35de seems like a waste of money when I can trade it in put the same money on top and easily get a 370z, G37, 1994 R33 GTR (RHD, high on insurance), 1993 Supra TT (RHD)
Then why you asking us questions if you feel like this???
ALSO, Ive read about the vq32de, destroked version of the vq35 using vq30 internals...so I was thinking if using forged vq30 rods would be able to support the vq35de at like, say.... 18psi??
Im guessing I would lose roughly (.3/3.5)x 274ft.lbs = 23.4ft.lbs of torque? but a faster and higher revving engine....i always thought the vq revs slow...except the rev match on the 370z
Theres a 500whp+ (560 i think) vq35de on stock internals but on 116 octane.
Build the block right and stop trying to be cheap
I reduced my car`s weight to about 1370kg...its a little faster but im still not satisfied with it... my options are stay NA and strip the car, rear mount he351cw turbo w/UTEC, LS block build then swap in, 2JZ swap in and then build, vq37vhr build and then swap in or stay fairly stock trade in and get something faster
KG where the hell you from? Canada? Get the hell out with that UTEC trash...you have Uprev!!!!
Seems like you dont know WTF you wanna do. Figure that out then come back and ask questions.....
Thanks for tech.help btw....
Thread Starter
Newbie - Just Registered
Joined: Feb 2013
Posts: 9
From: Yes
Most questions about boost can be asked on google and it will bring up many different forum links. I said this because you get the general knowledge of boost components and your engine and go from there. For example, our engines don't have timing belts. If you go on the my350z.com forced induction forum you can see many builds there and just reading the the build threads and stickies will give you quite a bit of general knowledge. You can see what they used and sometimes they explain why they went with what they did, all this teaches you as you watch others. Another example is low compression is no longer the requirement since alot more people are going with e-85 builds. Read, search and read some more, it will help you out then for the more difficult questions you can come back and ask.
As I stated I would like to stick with pump gas as its a DD. So lower compression is required to push more power if the rods allow.
These are the more difficult questions that have not been answered as I stated in my post.
seems like a lot of work (all this custom stuff no one has really done) to avoid doing a little bit of work (just get pistons).
people crack ring lands all the time, why would you skimp on pistons anyways (i assume you're doing it to save money, not because you think the pistons are plenty strong.)
I would stick with the stock components entirely and be happy with like 450whp/tq, or just do pistons and rods.
450whp/tq you're already going to be at extreme risk of breaking the trans. in fact you probably will. higher than that and you will just break it faster. unless of course you're planning on building it up, in which case you apparently have plenty of money, in which case why would you skimp on pistons in the first place?
people crack ring lands all the time, why would you skimp on pistons anyways (i assume you're doing it to save money, not because you think the pistons are plenty strong.)
I would stick with the stock components entirely and be happy with like 450whp/tq, or just do pistons and rods.
450whp/tq you're already going to be at extreme risk of breaking the trans. in fact you probably will. higher than that and you will just break it faster. unless of course you're planning on building it up, in which case you apparently have plenty of money, in which case why would you skimp on pistons in the first place?
And if I go with forged pistons, rods then I might aswell get sleeves, and then I might aswell go for an overbore to 3.8l and the whole thing ends up costing a **** load more.
Last edited by ManDogFish; Jun 12, 2013 at 01:20 PM.
Thread Starter
Newbie - Just Registered
Joined: Feb 2013
Posts: 9
From: Yes
FYI: I have not been able to find any case where a thicker head gasket was used to lower the compression for a vq35...
but then I dont think the 0.140" cometic head gaskets are that old
but then I dont think the 0.140" cometic head gaskets are that old
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Joined: Feb 2013
Posts: 9
From: Yes
Guess what exhaust piping the STS 350z turbo kit uses?
why not? this guy put together a vq35de with vq32de rods on these forums. He managed to lower the compression.
haha... so you never built your own block by cheaping out which limited you to 9 psi and you are telling me to build it right with forged parts??
whats wrong with a vq32de?
You may say the parts are for different engines and were not meant to be put together...which makes it "not" building the block right
but, in that case the vq35de or the vq30de were not made to go with a turbo with the stock internals...that means you did not "build" your setup right by not using forged parts
what mass units do you use? KG...
all the formulas are derived with mass as KG.
oo. I know what I want to do. I want to filter the trash out and only take valid information in for my build.
What's wrong with Canada? we have tt supra's and r32, r33 GTR's for $10-$15k here... We also have health coverage.
Im guessing you have not used a UTEC for a build ever.
Last edited by ManDogFish; Jun 12, 2013 at 01:22 PM.
I have read those ofcouse...no one seem's to have used only forged rods on any 350z forums. The 350z forum people heard of the vq32de from the maxima forum people...no one on the 350z side has ever tried building a vq32de while your forums have.
As I stated I would like to stick with pump gas as its a DD. So lower compression is required to push more power if the rods allow.
These are the more difficult questions that have not been answered as I stated in my post.
I dont think anyone has broken stock vq35de pistons from boost under 16psi yet. Maybe from detonation which was due to high compression. The pistons do not need to be changed.
And if I go with forged pistons, rods then I might aswell get sleeves, and then I might aswell go for an overbore to 3.8l and the whole thing ends up costing a **** load more.
As I stated I would like to stick with pump gas as its a DD. So lower compression is required to push more power if the rods allow.
These are the more difficult questions that have not been answered as I stated in my post.
I dont think anyone has broken stock vq35de pistons from boost under 16psi yet. Maybe from detonation which was due to high compression. The pistons do not need to be changed.
And if I go with forged pistons, rods then I might aswell get sleeves, and then I might aswell go for an overbore to 3.8l and the whole thing ends up costing a **** load more.
ManDog your a tool. Im just fine with 9psi not trying to do 500 hp on stock internals like you. I know the limits. And I cheaped out on MY build? Dude I probably have more money invested in my maxima build than 90% of the people in this forum.......there is NOTHING cheap about my build.
FYI: It wont be long before you see a CHEAP fully built turboed 2009 Maxima motor with pistons, rods, cams and valve springs and retainers......in my Maxima.......
Why take the engine apart and do all that and not just put pistons in while you at it?? Then run the risk of putting it all back together and having it fail? Just do it once and for all? Might as well do a .020 overbore on it and make sure cylinder walls nice and cleaned up....especially if its an old block with high miles.
Go ahead and use the UTEC (Im guessing YOU have never used a UTEC for a build)......there is a REASON why they discontinued it. Dont understand why you use a UTEC when you have uprev available??????? You are right I have never used a UTEC...I have a Haltech....2000000x better. If I had an option to use uprev I would have used it in a heartbeat.....I would not have spent $2000 on a Haltech system....
So a 3" exhaust will cause more LAg on a turbo than a 2.5"? Go ahead use a 2" exhaust.....it will spool the turbo faster!!!! matter of fact just BLOCK the exhaust off......You want MORE backpressure on the turbo....that will surely spool the turbo faster bro!
Nothing is wrong with Canada.......some sexy azz chicks there.
I would have loved to see the FLOGGING you would have received on the 350z forums.......would have been hilarious....instead you come here because you know the BEATDOWN you would have received over there.
FYI: It wont be long before you see a CHEAP fully built turboed 2009 Maxima motor with pistons, rods, cams and valve springs and retainers......in my Maxima.......
Why take the engine apart and do all that and not just put pistons in while you at it?? Then run the risk of putting it all back together and having it fail? Just do it once and for all? Might as well do a .020 overbore on it and make sure cylinder walls nice and cleaned up....especially if its an old block with high miles.
Go ahead and use the UTEC (Im guessing YOU have never used a UTEC for a build)......there is a REASON why they discontinued it. Dont understand why you use a UTEC when you have uprev available??????? You are right I have never used a UTEC...I have a Haltech....2000000x better. If I had an option to use uprev I would have used it in a heartbeat.....I would not have spent $2000 on a Haltech system....
So a 3" exhaust will cause more LAg on a turbo than a 2.5"? Go ahead use a 2" exhaust.....it will spool the turbo faster!!!! matter of fact just BLOCK the exhaust off......You want MORE backpressure on the turbo....that will surely spool the turbo faster bro!
Nothing is wrong with Canada.......some sexy azz chicks there.
I would have loved to see the FLOGGING you would have received on the 350z forums.......would have been hilarious....instead you come here because you know the BEATDOWN you would have received over there.
Last edited by ranmas2004; Jun 12, 2013 at 09:17 PM.
If you think pistons are unnecessary then try it without them. You're asking questions because you don't know, and then when the people that do know tell you something you disagree. I guess your mind is made up.
If you think sleeving a VQ is a) a good idea, and b) the natural progression after pistons and rods, that shows just how much you know. I've built (and they've stayed together for 7 years of racing) VQ35s in EXACTLY the power range you are looking to get to and set records (maximas and 350Zs). I'm giving you the tried and true formula that I've used, if you want to do something else that's up to you. Sleeving and going with a larger displacement setup is a lot more money than just doing pistons and rods, and is CERTAINLY not the natural next step after just doing pistons and rods.
Maybe you'll come up with a new build concept that will become viable for people, that would be cool. One guy ever (to my knowledge) has done the VQ32 setup, Tilley, he and I used to talk about builds all the time back in the day (2003-2005ish). I don't know if he's still bothering with that 3.2 build or if he has moved on. maybe you'll fail miserably and really wish you had done those pistons like we suggested. I hope not, but that's what I'd bet on. I've been around enough built 350Zs to see it many many times, and yet the one my buddy built in his garage is still out there setting records and running strong after 7 years (or is it 8 now?) on the same basic, budget built motor (eagle rods, arias 9.5:1 pistons, HKS HG, that's it). Oil analyses come back perfect every time and that car is driven HARD. That motor we built is solid. Only time will tell i guess.
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