I'm curious as to what others would run on their car for a nice usable power curve on a daily driver with stock cams. I'm going turbo eventually and plan for 400 whp as my goal but don't want a car thats geared for just peak power. I'm curious what you guys would run for a similar situation. I'm planning on a t3/t4 57 trim with a .62 ar @20 psi give or take a few psi after seeing what pumpgas will let me get up to. And yes I'll have a forged lower end on the car as well.
I'm just looking to get a convo going to pick some brains
JUCNBST wrote:I'm curious as to what others would run on their car for a nice usable power curve on a daily driver with stock cams. I'm going turbo eventually and plan for 400 whp as my goal but don't want a car thats geared for just peak power. I'm curious what you guys would run for a similar situation. I'm planning on a t3/t4 57 trim with a .62 ar @20 psi give or take a few psi after seeing what pumpgas will let me get up to. And yes I'll have a forged lower end on the car as well.
I'm just looking to get a convo going to pick some brains
I have that turbo on my 06' cobalt ss. LOVE it. It will have a great power band. Here is the dyno plot.
This was on 17 psi.
Turbo should be good for about 450 whp.
If you wan't even more torque and faster spool look into a T04E 50 trim with .48 A/R exhaust. SRT4 guys run them and hit full boost at like 3000 RPMs. They max out at 400 WHP (which is what you want), but they spool super quick and make for a really fun DD.
i went crazy and used a gt35 with an .82ar exhaust. with the .82 exhaust housing i dont spool till 4500 rpm but there is also a smaller .68 housing that will spool quicker. i wanted the opposite of you and just wanted high rpm hp so i could drive it daily without boosting until i wanted too. the .68 ar exhaust housing should spin up fairly quick so i think this would be a good turbo for 400+ hp.
t3/t4, gt30, gt35, theres a few nice borgwarners out there. as far as the mistu turbos go i dont know much about them so i cant recommend any of those.
I'd run one of the BW EFR turbos You can run a much larger turbine housing and get the same spool characteristics. An EFR 6258 or 6758 would work very nicely and would spool like the stock turbo from the LNF.
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GT35 is wayyy overkill for a max of 400WHP, it will only be unneeded lag for that power level. The EFR turbos are extremely nice if you can afford the 1500 dollar price tag.
Wagonwes wrote:The EFR turbos are extremely nice if you can afford the 1500 dollar price tag.
Exactly, you get what you pay for. Now with turbos you can say; Big power, Great spool characteristics, Cheap, pick 2.
1994 Saturn SL2 Home Coming Edition: backup car
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Sponsored by:
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You can pick up a good T04E 50 trim for around half the price though. Make the same power, with slightly slower spool.
My turbos have a .91 and a 1.15 A/R
I have no signiture
i have the turbo you were looking at and you will see soon what it can do for a dd power level. I have a feeling its going to be what you are wanting...
Im gonna be running tha Garrett T3/t4 57 trim .63ar and my car is gonna be a DD and still be able to hit my hp goal and have fun.So good luck with everything and keep us posted!! Yea builtnboosted your car is gonna be a beast and cant wait to see how that thing runs when its done!!
20G is also a great choice for around 400 WHP. It would spool pretty quick as well.
I like my TO4E 57 trim. I have full boost @ 3700rpm. My boost is highest at the 3700rpm and it falls off to a little under 13psi at 6600rpm. The specs on my turbo are:
compressor wheel: 56.7 / 74.9 mm 57 trim
compressor housing: 0.70 a/r, 4" inlet, 2½" outlet
center section: oil cooled journal bearings
Turbine wheel: 76 trim (stage 3)
Turbine housing .63 a/r, 4 bolts outlet flange
Correction on my boost. I went back and looked at my dyno graph. Had 10psi @ 3700rpm. Peak boost @ 4200rpm (14.9psi) and then goes down to around 12.5psi @ 6600. Boost levels at different rpm's are just an estimate as its hard to tell on the graph I have. Makes 300whp @ 13.2psi @ 6250rpm.
Same turbo as above,
takes me 1200ish rpm to reach full boost. That might have been with a crack in the manifold at the time. Ill be able to show you REAL soon what that sized turbo can do.
Edited 1 time(s). Last edited Wednesday, August 24, 2011 7:41 PM
1200 RPM is full boost? Is full boost like 10 inches of Mercury?
1200rpm seems extremely low...I have never heard of a car making full boost by then...Heck my car idles at 1300rpm. That means I would have 15psi @ idle. Now that would be interesting.
it takes me 1200rpm to make full boost. NOT im at full boost by 1200rpm...
Or unless you mean it takes you 1200rpm to go from starting to make boost to making full boost.
Leafy (Club Jeffie FEA man) wrote:I'd run one of the BW EFR turbos You can run a much larger turbine housing and get the same spool characteristics. An EFR 6258 or 6758 would work very nicely and would spool like the stock turbo from the LNF.
x2!
I just purchased an EFR 7670 .83AR
Best $1800 bucks you'll ever spend for an IWG turbo...
What is the maximum boost you run? At what RPM do you achieve that certain level of boost? Maybe 15 PSI at 3000 RPM or so?
I think you are trying to say you are no longer in vacuum at 1200 RPM?
BuiltNBoosted wrote:it takes me 1200rpm to make full boost. NOT im at full boost by 1200rpm...
Got ya...but that would be amazing though...full boost at 1200rpm haha. But 1200rpm seems about right. From my graph it looks like I am around 3000rpm to start making boost and at 4200 I make 14.9.
At 1:1, well as close to it as I can get, in 4th gear, boost builds and kicks in for the most part 3800. Boost peaks at 5000. With a small spike at 5200. Goes from 6psi(start of the pull), to 16psi (peak boost).
Cool. Seems pretty close to mine. I would probably put a 360 thrust bearing in mine if I was going to run more than 15psi.
