Turbo too big?
09-06-2005, 09:33 PM
#1
Turbo too big?
Is this turbo too big for our 3.0?
compressor: GT40
.70 a/r
61mm inducer
flow: 65 lbs/min 832cfm
turbine: T4
your choice of T4 turbine housing
available with 0 or P trim wheel
add $100 for Q-trim wheel
360* thrust bearing standard
*same compressor section as GT35R
I'm looking into this package deal:
http://store.yahoo.com/cheapturbo/40pa.html
which turbo would be better? T3/GT40 or T4/GT40?
compressor: GT40
.70 a/r
61mm inducer
flow: 65 lbs/min 832cfm
turbine: T4
your choice of T4 turbine housing
available with 0 or P trim wheel
add $100 for Q-trim wheel
360* thrust bearing standard
*same compressor section as GT35R
I'm looking into this package deal:
http://store.yahoo.com/cheapturbo/40pa.html
which turbo would be better? T3/GT40 or T4/GT40?
09-07-2005, 10:44 AM
#6
Newbie - Just Registered
Join Date: Sep 2005
Posts: 1
I have an 2002 maxima GLE automatic. I bought a turbo and am having a manifold custom made for my car i bought the intercooler and blowoff valve i was told since i was not going ot be boosting more then 10 lbs i wouldn't need new injectors or fuel pump. What i'm concerned about is the transmission. If any of you know about what i'd ahve to do or if i would have to do anything to the tranny plz post a reply or email me joejoe2262@yahoo.com. I was told since i was not boosting that much i would not have to make any modifications to the tranny but i'm still not certain.
09-07-2005, 02:15 PM
#7
For $110-$130 more then their non-package price, you can get get a TRUE dual BB Garrett GT35R here:
http://my350z.com/forum/showthread.p...69#post1676169
It has a T3 flanged 0.63 A/R turbine, which would work for a mild-medium boosted stock rev-limit VQ30 and I'm sure even more.
IMHO, stay away from GT wheels in T-trim housings especially ones with mix-matched unknown "ABCDEFG" trim turbines. Garrett spends a lot of R&D to pick the proper combinations of wheels and housings, so unless you plan on trying several to match your setup, you probably won't find anything better. Let alone somebody out there just slapping things together. Just my .02.
http://my350z.com/forum/showthread.p...69#post1676169
It has a T3 flanged 0.63 A/R turbine, which would work for a mild-medium boosted stock rev-limit VQ30 and I'm sure even more.
IMHO, stay away from GT wheels in T-trim housings especially ones with mix-matched unknown "ABCDEFG" trim turbines. Garrett spends a lot of R&D to pick the proper combinations of wheels and housings, so unless you plan on trying several to match your setup, you probably won't find anything better. Let alone somebody out there just slapping things together. Just my .02.
09-07-2005, 03:02 PM
#8
Originally Posted by Maxima4lyfe22
I have an 2002 maxima GLE automatic. I bought a turbo and am having a manifold custom made for my car i bought the intercooler and blowoff valve i was told since i was not going ot be boosting more then 10 lbs i wouldn't need new injectors or fuel pump. What i'm concerned about is the transmission. If any of you know about what i'd ahve to do or if i would have to do anything to the tranny plz post a reply or email me joejoe2262@yahoo.com. I was told since i was not boosting that much i would not have to make any modifications to the tranny but i'm still not certain.
09-07-2005, 07:01 PM
#10
Absolutely. T3 almost any AR is pretty darn small for a 3.0, too small in my opinion but some people would argue otherwise. For a better breathing and larger 3.5 it's too small without question.
I don't know what your power goals are but I'm not a fan of the 60-1 compressor. For most people that get them, there are better turbo choices out there.
I don't know what your power goals are but I'm not a fan of the 60-1 compressor. For most people that get them, there are better turbo choices out there.
09-07-2005, 07:06 PM
#11
Senior Member
Join Date: May 2005
Posts: 279
Originally Posted by Nealoc187
Absolutely. T3 almost any AR is pretty darn small for a 3.0, too small in my opinion but some people would argue otherwise. For a better breathing and larger 3.5 it's too small without question.
I don't know what your power goals are but I'm not a fan of the 60-1 compressor. For most people that get them, there are better turbo choices out there.
I don't know what your power goals are but I'm not a fan of the 60-1 compressor. For most people that get them, there are better turbo choices out there.
09-07-2005, 09:36 PM
#15
wat makes u think that??? I pm u when I bought ur FMU saying i was upgrading those things... just cuz I'm still a noob in this doesn't mean I'm gonna do it recklessly. Those numbers I don't plan on acheiving right from the start, I just want to know what size turbo would be capable of reaching those numbers.
09-08-2005, 07:22 AM
#17
Moderator who thinks he is better than us with his I30
iTrader: (8)
Join Date: May 2002
Posts: 9,335
Originally Posted by jcy98maxse
wat makes u think that??? I pm u when I bought ur FMU saying i was upgrading those things... just cuz I'm still a noob in this doesn't mean I'm gonna do it recklessly. Those numbers I don't plan on acheiving right from the start, I just want to know what size turbo would be capable of reaching those numbers.
09-08-2005, 09:28 PM
#20
Originally Posted by SPiG
That isn't a power goal. 7psi on a T3 is vastly different from 7psi on a GT40R.
Mike
09-09-2005, 12:58 AM
#23
Okay, With this turbo (T4/GT40); 38mm Wastegate; Forward-style feed pipe (2.5) and 3 in Downpipe with a 3in cutout. What type of numbers should I see @ 7psi? Assume that I have the neceessary fuel management: 550 injectors, SAFC/Emanage; Z32 MAF; FMU; 265lph Pump and AFPR.
My power goals is like I said 350ish whp daily and around 400whp on 3.0 5spd max.
I want to know if this turbo is good enough to get me there or should I be looking at something else.
I looked into the GT35R from the link Icy gave but thats from a private seller so I dunno if it would still be available. Also reading Turbo97se's thread on the GT35R, he actually have a special trim which isn't like the ones you find off the shelf plus I don't think I'll have that much $$ just to spend on the turbo.
So guys what do you think?
My power goals is like I said 350ish whp daily and around 400whp on 3.0 5spd max.
I want to know if this turbo is good enough to get me there or should I be looking at something else.
I looked into the GT35R from the link Icy gave but thats from a private seller so I dunno if it would still be available. Also reading Turbo97se's thread on the GT35R, he actually have a special trim which isn't like the ones you find off the shelf plus I don't think I'll have that much $$ just to spend on the turbo.
So guys what do you think?
09-09-2005, 01:28 AM
#25
yes I know ur turbo can pull those numbers but I want a little bit quicker spooling turbo. remember I won't have a JWT like u so I have a stock rev limiter. If I remeber right, you say u see boost @ 4500rpm that leaves me with little room to work with.
Plus I could use a 35 shot to spool it even thought I'm set up for it. I kinda wanna stay off the bottle to get those numbers and spray to get higher.
but I know you can't get the best of both worlds quick spool with high power without spending a lot $$$ but I just want a well balance turbo that I can play with. If there isn;t a good one,i'll consider other options. The luxury of not making a impulsive purchase and people with experience in this field.
Plus I could use a 35 shot to spool it even thought I'm set up for it. I kinda wanna stay off the bottle to get those numbers and spray to get higher.
but I know you can't get the best of both worlds quick spool with high power without spending a lot $$$ but I just want a well balance turbo that I can play with. If there isn;t a good one,i'll consider other options. The luxury of not making a impulsive purchase and people with experience in this field.
09-09-2005, 07:05 AM
#26
Senior Member
Join Date: May 2005
Posts: 279
Originally Posted by jcy98maxse
yes I know ur turbo can pull those numbers but I want a little bit quicker spooling turbo. remember I won't have a JWT like u so I have a stock rev limiter. If I remeber right, you say u see boost @ 4500rpm that leaves me with little room to work with.
Plus I could use a 35 shot to spool it even thought I'm set up for it. I kinda wanna stay off the bottle to get those numbers and spray to get higher. but I know you can't get the best of both worlds quick spool with high power without spending a lot $$$ but I just want a well balance turbo that I can play with. If there isn;t a good one,i'll consider other options. The luxury of not making a impulsive purchase and people with experience in this field.
Plus I could use a 35 shot to spool it even thought I'm set up for it. I kinda wanna stay off the bottle to get those numbers and spray to get higher.
but I know you can't get the best of both worlds quick spool with high power without spending a lot $$$ but I just want a well balance turbo that I can play with. If there isn;t a good one,i'll consider other options. The luxury of not making a impulsive purchase and people with experience in this field.I know I have a bigger motor in the vq35, so I should be able to spool up quicker than a vq30 with a 60-1, but im just going to get a t3/60-1, if I don't like it I can always sell, there are alot of turbo feens around my way, so it wouldn't be a problem selling.
09-09-2005, 03:00 PM
#27
MardiGras has posted a ton of datalogs of his PFI kit with T4 60-1 over the past year or two so you guys could see exactly when he spools if you would check out his threads...
I also don't know how many times I've said this, it's probably going on 10 now, but your turbo piping has as much to do with how quickly your car sees boost as the specs of your turbo.
I don't know how much more advice I can give on the subject of ARs without repeating myself over and over again.
I also don't know how many times I've said this, it's probably going on 10 now, but your turbo piping has as much to do with how quickly your car sees boost as the specs of your turbo.
I don't know how much more advice I can give on the subject of ARs without repeating myself over and over again.
09-09-2005, 03:24 PM
#28
yes I understand that Neal. Hence I post with the style and size of piping I am trying to run. BTW its Mingo's piping setup if he comes thru... I appreciate your help very much and am not trying to annoy any of you turboed guys out there with these questions.
My question wasn't directed to how soon the turbo will spool rather than if this turbo(T4/GT40) is adequate to put down the numbers of my power goals. I can live with a later spool but prefer not to.
My question wasn't directed to how soon the turbo will spool rather than if this turbo(T4/GT40) is adequate to put down the numbers of my power goals. I can live with a later spool but prefer not to.
09-09-2005, 03:40 PM
#29
This last post was directed more at starchild and others who insist on using inappropriately sized turbos, your turbo won't be a problem. There are better (and more expensive) turbos, but it's not bad. A t3 60-1 is a turbo sold in a alot of the higher power honda B Series turbo kits (not that it's well suited to that either, but that's not the issue here).
09-16-2005, 11:13 PM
#33
heres a link from PFI's old thread...
http://forums.maxima.org/showthread.php?t=361469
http://forums.maxima.org/showthread.php?t=361469
09-17-2005, 10:58 PM
#34
Originally Posted by slimer
Since its a smaller turbo a .8x would give you a little more headroom.
would the .8x ar affect 1/4 times. From wat i read in the FAQs the .8x is more of a highway setup while the .6x is for more track/street so I figure the .70 would be decent, somewhere in the middle. any other opinions?
09-18-2005, 01:35 AM
#35
You heard right. Given the same piping and every thing else, .8x will be a little more laggy. .70 will see boost a few hundred rpm quicker. you don't really need to go .8x unless you are looking for to make really big power like 400 or 450+
09-18-2005, 01:36 AM
#36
Also, if you don't like the turbine you end up with you can always change it later for like $150 and sell the one you take off there.
Slimer, the one jcy is looking at is a t4 not a t3 so .70 is pretty good, that's the size mike runs.
I've got a .84 personally but I'm making more power and running more boost than most folks, and also have higher flow piping than everyone else too.
Slimer, the one jcy is looking at is a t4 not a t3 so .70 is pretty good, that's the size mike runs.
I've got a .84 personally but I'm making more power and running more boost than most folks, and also have higher flow piping than everyone else too.
09-18-2005, 05:12 PM
#38
Neal- do you think it will give me problems in terms of it surging or not being efficent at higher boost? I don't think it would but I'm curious to know. would this have a similar compressor map as a GT35r even though this isn't BB?
09-18-2005, 05:26 PM
#39
No it wouldn't surge. Higher boost is subjective... is 12psi what you consider higher boost or is 18psi what you consider higher boost, etc. Either way I don't think you will have a problem.
As far as the map I don't know because in the first part of your post it says its a GT40 wheel and then the second part of your post says GT35R wheel. Anyhow there are a number of GT40 wheels and a number of GT35R wheels so the short answer is that without more info I don't have a clue. But all of the possible wheels work pretty well for the max, some a little better than others but you shouldn't be in too bad of shape unless you are looking for more power than most people are making.
As far as the map I don't know because in the first part of your post it says its a GT40 wheel and then the second part of your post says GT35R wheel. Anyhow there are a number of GT40 wheels and a number of GT35R wheels so the short answer is that without more info I don't have a clue. But all of the possible wheels work pretty well for the max, some a little better than others but you shouldn't be in too bad of shape unless you are looking for more power than most people are making.
09-18-2005, 08:32 PM
#40
Originally Posted by Nealoc187
No it wouldn't surge. Higher boost is subjective... is 12psi what you consider higher boost or is 18psi what you consider higher boost, etc. Either way I don't think you will have a problem.
As far as the map I don't know because in the first part of your post it says its a GT40 wheel and then the second part of your post says GT35R wheel. Anyhow there are a number of GT40 wheels and a number of GT35R wheels so the short answer is that without more info I don't have a clue. But all of the possible wheels work pretty well for the max, some a little better than others but you shouldn't be in too bad of shape unless you are looking for more power than most people are making.
As far as the map I don't know because in the first part of your post it says its a GT40 wheel and then the second part of your post says GT35R wheel. Anyhow there are a number of GT40 wheels and a number of GT35R wheels so the short answer is that without more info I don't have a clue. But all of the possible wheels work pretty well for the max, some a little better than others but you shouldn't be in too bad of shape unless you are looking for more power than most people are making.
As for higher level of boost, at most I would want is about 14-16psi. That won't happen immediately because I'm still contemplating on the method of retarding timing. I would prolly stay around 9-12 psi as a daily driver (at the moment I'm leaning towards Mike's temp. setup of 550cc/SAFC/Z32 MAF/A32 ecu. I prefer to get an EU once the bugs are worked out), I bought his FMU just in case i go different. Anything above 12psi is for the track so I want to get slicks first before I go.
BTW Neal- wat are you using to retard timing? I know you are running a good amount of boost but I haven't been able to figure out what you are using for that department. Wasn't ur car Hal's car before when he dyno like 500ish with nitrous? if so, r u running nitrous too?
Ultimately, I would like to see over 400whp after all is said and done. I'm planning on getting the .70 a/r for now and I'll dyno it to see where i stand. If I'm close I might just leave the a/r alone and put a 30-50 shot on top since I'm hooked for it right now. If not I'll go on for the bigger a/r or a bigger turbo but this is all just speculation for right now.