I want to make enough power to run my car in time attack. I am looking for a turbo that comes on between 4000 - 4500 RPM's. I still want to be able to drive the car on the street and on a daily basis, so drivability is very important to me. I called Buschur, Garrett, and Greddy and got different answers from "stay with the 20G to go with a 35R" I am still new to this and want the advice of the people in the know.

Any help you can provide would be great, thank you.

 

37r??

 

Why not go in the middle ....50 trim slightly later spool but 400 on pump easy

 

what is the 37R capable of and at what RPM does it hit max boost?

 

[QUOTE=mitdrx;5211881]Why not go in the middle ....50 trim slightly later spool but 400 on pump easy[/QUOTE

That seems like the HP might be slightly low for time attack, what do you think? when does it hit?

 

Something like a 57 or 61mm turbo would be perfect. A 57mm would make some very good power on pump and alky, right about 390-400 whp on a Mustang Dyno assuming you are running about 27-28 psi on a stock 2.0 with all the supporting mods. A 61mm would take it up to the next level, giving you 450 whp (MD again) on pump/alky and the same boost levels. That is right about the limit for saftey and reliability for T/A and a stock motor. Both of these turbo's would be very good on either a stock motor or if you decide to go to the next level on a stroker. Keep in mind the 61mm will spool a bit later than what you are looking for (4800ish) but will make up for it in extra power.

My vote is for 57mm for your goals.

 

the 37r is too large for your setup. unless you are planning on building the motor you will not be able to maximize the potential of the turbo reliably and it will be much laggier than you are looking for.

 

what do you think is a wise choice?

 

Do you plan to run race gas for the Time Attack events and straight pump on the street? What is your target horsepower for racing use?

EDIT: Thinking it through, if it was me, and I wanted to do that type of racing, I'd start by at least strengthening the bottom end with drop-in rods and pistons, port the head, get an AEM EMS, and do a B.R. HTA-35. Then I'd have Dave Buschur tune it on Import fuel. You're going to need a BBK too.

 

50 Trim All The Way Buddy

 

I do plan to run race gas when racing and pump on the street. I dont have a target hp I just want enough to be competative but still keep reliability and drivability. With the setup you are talking about seems like a full race setup and like it wouldn't be that streetable. Am I correct or not?

 

With this setup in mind what supporting mods would you recomend?

 

cams (272 or 280 preferably), 780cc injectors, some sort of alcohol/meth injection, HKS DLi (optional but will help alot) 3" IC with piping.

 

You are correct

 

No offense to the guys suggesting 50 trims but..............buying a 50 trim is retarded in this case for sure. You say you have a 20g, is it the new 20GLT/Green turbo? If so it will perform atleast as good as a 50 trim if not better and you already own it. I have 5 cars we've put into the 10's running 128-130 mph trap speeds and at full weight on the 20gLT/Green turbo. I don't know of a single 50 trim EVO in the 10's.

I understand this is not about drag racing, I am simply making a statement about the power potential of the 20gLT/green turbo.

You say you want the power to "come on" 4000-4500 rpm. What exactly do you mean by come on? Do you want full boost by then? A really well set up HTA35r will hit 20 psi around 4500 rpm. A really well set up 20gLT/Green will make 20 psi at 3500 rpm.

The power from the Green comes on like a stock turbo, so lots of low end power. I think with 5 cars running right at 130 in the 1/4 it shows good top end power too.

The other problem I see is your mod list. It is not complete enough to make outstanding power with any turbo, large or small. I think in order to compete in Time Attack there are a bunch of things you need to address before trying to make 500+ whp on a 35r. Maybe you mod list is not complete, I don't know.

I'd be glad to recommend a turbo but I need more information.