What Is The Rpm Range That The 30, 35, And 37 Hit Around At Initial Boost And Full Boost On A Stock Block? Im Trying To Find Out If Its Worth It To Get A Gt37 When You Only Get Like 2000 Rpms Of Full Boost On A Stock Block?...is It Worth Going With The 37 Than The 35? I Know The 35 Ranges From 3600-4000 And The 37 Ranges From 4000 -4500...but What Does It Usually Hit At With A Ams Kit Or Buschur Kit With A Stock Block! And What Rpms Can The Stock Motor Hold Up To...7500??

 

stop dreaming! gt35r will not boost 3600-4000 on stock block. It's 4600-5000. I have one.

 

If you have a stock block dont get a 35r.. A smaller turbo is more than capable of maxing the stock blocks power limits. All a larger turbo will do is increase lag.

If you have no plans to upgrade the internals AND run race gas occasionally, get a 50trim or 3076r. Those are the best turbo's for stock block/pump&meth setups.

Anything more doesn't gain you any power, and will make the car slower due to less area under the curve. This is why on straight pump gas a 20gLT is faster than a 35r..

 

i would run a 30r if i were you

 

Stop typing like that....

 

Isn't It Because He Had Caps Lock On

 

yes cap lock, i already told him to take it off in another post.

i figured him to be a little kid without a car, dreaming with the big boys. he got angry and told me he's military.

anyways to topic, you asked similiar questions in other posts i believe, but the stock block is good to like 8,500-9,000 rpm.

its the head that needs upgrading, including springs, retainers, cams would be nice, and so on.

how much horsepower is your goal? that is the question you need to ask yourself.

the "lag" will be something you can drive around when it becomes a factor.

how much HP are u looking for? you plan on running meth + pump gas? race gas? then we can help you decide, and im sure some people can chime in with their stock block results with the turbo that reaches ur HP goals.

 

....

 

I dont really see much of a problem with my 35R with the lag, when I'm cruising around town I am usually barely in boost, maybe 2-5 psi at most. If I ever get in a race, I sure as heck am not going to start a race while in a high gear. You drop gears to get to a good rpm range to take advantage of where your full boost point is at. I usually drop to about 4500 rpm, from there I have almost no lag what-so-ever, and shift around 7800 RPM.

caelin~

 

^^^^^^ DO NOT LISTEN TO THIS PERSON. Revving a stock block to 9k rpm, are you serious????? I dont care if you have a ported race head on there, there is no reason for a stock EVO block to EVER be revved to 9k rpm on purpose, unless you are TRYING to blow it up and have a rod shoot through the motor. Please do not put your poor motor through this kind of abouse

 

35, 37 if you like to drag race. Stock block can be rev up to 8200-8500 with head studs but you got to have a good tune. It'll be harder to launch, shift, cornering... On freeway it's a monster, you can do awd burn out.

PS. A 20gLT will not be faster on pump straight line. It'll be faster on turns since the sudden boost of the gt35 may get you killed in the tight corners.

 

so i guess 35r revving to 8000k should be alright on a stock block with cosworth cams and supertech valvetrain??

 

You should be more worried about your block rather than your head because on stock block with a GT35R,its just a matter of time before your internals smoke.

 

What dont people understand? This is the third or fourth thread in the last couple weeks about someone wanting to run 35r's or bigger on the stock block.

WHY?? A 35r will not make any more power on the stock block than a 50trim or a 3076r. If your not going to upgrade the internals, you CANT use a 35r to it's potential. All you will get is more lag, and a slower car.

If all you care about is bragging rights, so you can tell all your friends, "yeah, I have a 35r" then fine.. But dont complain when you get smoked by Evo's with smaller turbo's..

By the way, this isn't directed at the OP only, I'm just sick of everyone wanting huge turbos just for the sake of having a huge turbo.

 

I do not agree with some of what has been said here.

First to answer the question.

There are a bunch of GT30's, so asking what they spool at is impossible to answer without knowing which one you want.

Common GT30's are the GT3076, which I think is a turd. It will make 20 psi at around 4300 rpm on a stock block 2 liter. I have not scene any exceptional power come from it.

Next GT30 is the GT3065 we sell. It makes 20 psi on a 2 liter around 4300 rpm and has put down over 500 whp on our dyno. Jarrod runs it and has gone 131 trap speeds, learning to drive

The GT35R will make 20 psi around 4500 rpm, it has made 590 whp on our dyno, my RS run this turbo and has gone 9.97 at 142 mph.

The GT37R will make 20 psi around 5,000 rpm, has made 650 whp on our dyno.

The GT35r is not a "no-no" for the stock block. I have a BUNCH of customers running the GT35R on their stock blocks and stock heads making anywhere from 450 whp to over 500 whp on our dyno. I just tuned a car two weeks ago with our GT35R on his stock block/stock head and he made 509 whp on E85 fuel. The car has had the GT35r on it since the car has about 1,000 miles on it and he has never had a problem.

I have another customer who's car is at our shop now. His car made 470 whp on our dyno, he has been running the GT35r on his stock block/head for an even longer time. We put rods/pistons in his car just to upgrade this week. The engine was in absolutely beautiful shape. Didn't require boring and the stock bearings/rods/pistons looked great.

The main concern is the tune has to be dead on with very little knock. The other thing you have to limit is the RPM on the stock engine with big power. An absolute maximum rpm of 8,000 rpm is what I'd recommend when approaching/exceeding 500 whp on the stock shortblock.