Hi

I just had a patent approved! patent = $$$. So I have decided to start my engine build. I got a spare engine to start work on so I can just swap it in.

I have been searching around looking at people's configurations and not sure what I should put in for internals.

1. VQ30DETT pistons, Arias pistons or JE pistons? 9:1, 8.5:1?
2. Probably stock crank
3. Rods? (maybe Eagle or Pauter makes some, need to check)
4. Camshafts (JWT have some that work with spacers)
5. deck weld support.
6. O-ring block?
7. JWT reinforced headgasket?
Should I touch the head? Some say no need.

Hope to run 20 psi SOON! (After I break the engine in of course!)

Would appreciate any advice!

 

20 psi

 

Wow. Let us know how things turn out...

 

I say O-ring it. You might as well do EVERYTHING you possibly can now, while the engine is out the first time, than risk pulling it again. I would also work the head, while normally gains may be minimal, with 20 psi, every little bit I would think helps.
Good Luck!!

 

That car is gonna be a monster, the first 11-sec max???????

 

If you don't want to do over-size s/s valves, or titanium springs/ retainers, etc. I would strongly recomend porting both the intake and exhaust side of the head. You dont even have to have it machined, open them up a little with air tools.

My friend races DSM's. 12.8 @ 108mph before, 12.505 @ 111.7mph after head work. He runs 25psi at the track. You want to run 20psi, I would do it while your in there. The air will be happy.

 

P.s. Your car is the ****

 

valve seals might be pretty good. how bout the vq30dett crank? is it any different?

 

I say make a billet deck cap and prove my theory about how much the stock internals can hold.

 

Hmmm, do you own a house yet? haha

Sounds like a ton of money to spend on a Maxima.

 

Don't you think you can get the best advice from JWT? They are the experts and will tell you what works, how to best spend your money, and any technical info you may need.

 

Patent for?????

 

Remote control toaster...


j/k

 

Am I the only one who thinks putting that much power in a FWD car is pure insanity? And to think, stock Maxima 5spd owners complain about torque steer ...my question is, how do you plan on keeping this beast under control?? I wouldn't be surprised if you saw like 700HP from this. How long your tranmission will last under 20psi is unknown...could be 3 seconds, or you might get lucky and get 4 seconds out of it.

 

good luck with the project, its gonna be a bish parking it - one tap at the accelerator and your at 60

 

Not really...he'll probubly have some turbo lag.

 

woooowwww keep us all informed! Very kewl!!!

 

I dont know about 20psi on the stock crank! If your going to build it I would replace that too, its a ***** to do it all over. Just dont go cheap, build the bottom end and then get boost happy.

Rich

 

Isn't there someone in the 5th gen forum who runs 10.60?

 

It was the VG30DETT with the 87mm pistons and 83mm stoke. I doubt there ever was such a thing as a VQ30DETT. They only made a VQ30DET.
VG not VQ

 

Ideas? New transmission Craig nailed that one, your stock one will hold up bout 5 seconds with that sort of power.

 

Am I the only one that gets sexually stimulated by this much hp in a maxima.

 

actually, i'd decide how much power exactly you want to go, and not just aim. as others have mentioned, there's gonna be added responsibility with the higher number you go. our trannies suck as they are, but if you go you'll need to do some extra beefing up the higher you go. also, i'd budget money per level. if you're gonna do an engine buildup, you should do a good full one, not just piston/rod combo. you could easily be able to bore and stroke your engine with getting custom rods/pistons (which will be cheaper if you get it from manufacturers that already have them for us). i know arias makes pistons for our car. i'd recommend je pistons though, and crower or pauter rods. titanium valves and valve springs will give you the ability to run higher rpms, which with a turbo, is very good. i'm sure the cam that jwt has isn't a good profile for a built turbo car, even though it will be an improvement, you can see much better gains out of getting that cam made to a better grind. lastly, i'd see about getting custom axles and maybe a few other things made. they will cost lots, but you've got a good chance of breaking them if you run some serious power. again, i'd space out your money with all these mods, but they're all going to have to be done, not just one or two. only thing that could be neglected for now is heads. you can always pull those off after the buildup and redo those. your main gains will be from the engine and your main safety concern will be the axles and tranny. good luck!!

phew.... that was a long post

 

I was under the impression the amount you could bore a VQ30DE was negligable. Stroke was a different story but nobody's done it yet (3.3 litre?).

 

I don't know why you guys seem to think that our manual trans can't handle a lot of power.

I have yet to hear of even ONE case of a maxima's input shaft failing from the stress of too much power.

I have heard of broken drive axles from the use of slicks...but they are few and far between.

Most maxima 5-speed trans failures are due to DRIVER ERROR in shifting....NOT TOO MUCH POWER.

It's not like we have an all-wheel-drive that puts TONS of stress on the trans on launches...we harmlessly spin our tires....

 

As far as the tranny goes would the treatment that you dip the peices into to make them stronger help hold up? I think it is somethign like cryo treated or something like that. maybe someone can remember the whole name.

SuDZ

 

Here's few quick names come to mind that blew their manual tranny. I don't know if it's input shaft failing or not.

SXR7
ericwong
Keven97SE

I'm sure there are plenty of others.

 

NP..

The Z code is just going to be VQ35DE for now. But if they turbo it I doubt it will be twin turbo. So it'll be called VQ35DET. Twins will only add to the cost and complexity of the car. It has been proven time and time again that single turbo setups are the way to go.

 

add my name to that list too....BUT....all those failures were either due to "missing a gear" too many times, or improper bearing shim sizes from the factory that cause the bearings to wear out prematurely.

NONE OF THEM had an input shaft that failed.

 

As a matter of fact, there is such thing as the VQ30DET, found in the Gloria and putting down a supposed 280 hp, and 285 ft-lbs of torque.

Theres also a direct-injection version of the 3 litre VQ that makes 240hp, and a VQ25DE that makes 210hp.

 

this ericdwong?
http://forums.maxima.org/showthread....hreadid=137909

 

Who said there wasn't one?

And any direct injection engine from Nissan has a 'D' in the engine code for it. So the engine you suggested is called the VQ25DD which is in the Cefiro.

 

Yea thas right cryo treat a tranny, OMG dood I dont think he has that much money at least I hope not cause damn why bother with the engine he gotz now just get a new one and build it from the grund up. But hey nigel if ya can then cryo yer tranny, but thas gonan cost a arm a leg and some teeth and very complex cause you would have to take apart yer tranny and then send in ever part to a cryo place, this can also be done for engine parts too. Here is a place that does cryo of parts cryopro its not too costly when looking at it, but if ya want take all those custom parts ya want to get and cryo all of em. I would if i had the money. Oh and i will be contacting ya in a coule months bout a possibel turbo kit fer a automagic, my borther has my max in Albuquerque and I could have him drive it up to PFI so they can do up a kit for it in the next coming months hopefully if all goes well, Good luck and may the force be with ya

 

I would see if you can add some oil squirters ala VG30DETT Z32 engine. And maybe see if you can somethow upgrade the oil pump's pressure and/or capacity. With that much psi, heat is going to be the #1 enemy. Seriously consider getting your pistons and conbustion chambers done in some type of thermal coating. Try to get some exhaust valves that are sodium filled / inconel. Also consider getting the sides of the pistons coated in a dry film moly coating also. Just some thoughts.

 

Jeff Hubert runs 11.9 @ 119 in his Max. He wins.

 

Good luck, please make this work...

 

You dont have to take apart your tranny to get it cryo treated...place in mass called hekiniem (might be bad spelling) cryo treated my friend tranny, his clutch and flywheel and even powder coated the tranny silver for like $700...only thing is you have to replace the seals cause during the process they tend to break apart etc and harden cause of the temperature...

 

No it cost like $350

 

I heard that theres a new car in the lawn and the pretty red car in your sig is gone?

 

Lies all lies Damm it Maybe another red car replaced it