garyherr

First turbo build.See if I'm going in the right direction?My hp goal is around 350-390.It's going to be a street car.It's going to be tuned on hondata s200 I believe theres no boost option on it?So I'll be running of the wastegate spring.Heres the setup.

97 Integra GSR

Portflow head Jun springs and retainer

Stock gsr cams

JG IM

BDL 72 mm TB

RC 440 staurated injectors

Stock block 81.5 cp low comp. piston.Eagle rods,ACL bearings

Full Spoolin Performance kit Garrett GT28rs .60 cold .82 exhaust

SP log manifold,Tial 38 wastegate 8.9 lb spring

2.5 DP,Spooling intercooler pretty big size,Tial 50 mm BOV

Golden Eagle vacuum box,ClutchMasters FX500 with 8lb flywheel

Would I be able to reach my goals?Or is my injectors will max before I can reach my goals?And of course running just off my wastegate spring.Any other advaice would be gladly appreciate.

black_EM1

As far as I know, GT28s run out of breath around 350-360 at the most. I may be mistaken though.

The thing about injectors, you will always want more power so get ones big enough to grow with. 440s won't cut it. I'd go with at least 750cc if you're going RC. That DP is going to hurt you in the long run as well. 3 inch should be your upgrade from that.

If you insist on Hondata, get the s300 w/boost. It's a great tuning tool IMO. 9psi on a GT28rs isn't going to get you to your goals. Get some form of boost controller, the s300 has that option.

Ericy321

With bigger injectors you should be close. The GT28 will top out right around there. You have the engine work and tuning right on it seems..

Also agreed on the downpipe. For that power level, 3 inch should be used.

TheShodan

iTrader: (14)

The Gt2860RS was not made to do over 350, even if PUSHED. If you went internal wastegate, it would have to be changed in order to get even close to that. You CAN switch to a Gt3071 to do that a bit more realistically.

garyherr

Let me know if I'm wrong but if you run on just the wastegate would'nt it double the boost pressure?LLike I said first build.

garyherr

Yes, it is a external wastegate.Then close to 350 would be my goal for now,Again would my 440 support it?Or It'll max?

garyherr

I would love to have the s300 but from previous na build i already have the s200 on hand.Is there any other option boost running low on funds.And like I said before if I ran untill the wastegate open would'nt that be close to 15lb of boost?let me know if I'm wrong.

smoovy

if you ran on just spring. it would be 8.9PSI or possibly less depending on your set-up. it wouldn't double off of nothing. the saying is if you have a 8.9 PSI spring, you can run up to 80-90% above that so somewhere around 14PSI safely on a boost controller without boost creep(or whatever you call it)? someone correct me if I'm wrong.

93 Eg Couper

440cc injectors wont be enough
buy some 750's and when its tuned they will give the proper fuel flow so it dont run rich
a 255lph fuel pump is needed as well and a proper tune

TheShodan

iTrader: (14)

That FX500 is gonna be interesting for only 390whp. On the Time Attack car, we're at 450whp, and an FX400 is more than enough and still fun to drive on the street occasionally.

You'll need a good boost controller, (I would NOT use the turboXS, use a Greddy Profec S (notice I didn't say "B SPEC II) ) larger injectors.

I still believe that the GT28RS you have will be maxxed out by the 350whp mark, so that is your bottleneck

black_EM1

Get 750cc. Room to grow.

AVC-R or some form of boost controller should work in this case. No, the wastegate spring opens up at a certain amount of pressure i.e. at 9psi, the wastegate would open up ant dump the remaining exhaust gases to atmosphere. So the answer is no.

You will also NEED a Walbro 255lph. This is one thing you can't cheap out on.

garyherr

garyherr

So your saying if I had a manual boost then I'll be fine?And whats this boost creep I keep seeing on manual boost controller.would I be fine?And last do I need 3bar map?yes I do have the 255lph.

garyherr

Really thanks for all the advice and input on my thread.Like I said very first turbo build I have no clues,except HT info only.Again thanks,and any other info would be appreciated.

black_EM1

I need to correct my earlier statement, the AVC-R is an electronic boost controller, not manual. Bit of a difference. Get a good boost controller and you're set. Do some reading on these, and decide from there.

As far as the map sensor goes, I went with the Omni 4bar because of the plug and play compatibility. It replaces your stock, and there's no wiring. Hondata also makes one. There's others like the GM, AEM, but they all require wiring. You will nedd to replace your stock one, for sure.