beta383

Im looking for a good turbo setup for a 89 camaro. Its 383 9.5.1. Comp. It has 500 hp to the crank and 175 shot nos. car is carburated right now but plans to go with FAST'S XFI 2.0 system. dont know exactly what the internals are as this is my cousins car. But I could find out if need be. I was looking at the wrenchrat tt kit with turbonetics turbos and also banks tt kit. Witch one is better for these motors? Also what size turbos should I go with? Also do I need an intercooler? Sorry if thats a dum question but I thought all turbo setups needed an intercooler, and all the pictures iv seen pipping goes straight to carb hat or efi system. So im guesing you dont need an intercooler. Just thought id ask just incase im wrong. All and any info will be greatly apreciated..

beta383

Update.. cam.Specs:

Cam Type: Flat Tappet
.487 Intake .503 Exhaust
234 Intake / 244 Exhaust duration*
@ .050 - 112 degree

Jay_rich

iTrader: (4)

What the goal and plans for the car. with a 383 I would at be looking at a T6 turbo for a single or a set of twins in the 0.68-.081 a/r range depending on size etc. Twins are easier to package than a big single thats for sure. But comes down to what you want to do with the car.

What type of gas? if E85 I wouldnt worry a ton about an intercooler right away. Meth will help but is kinda a crutch on a street car. im not a fan of tuning a car to rely on having a full tank of meth all the time. I would rather tune it safe.

A single Box stock S475 T6 1.32 a/r will get ya around the 800whp range for $650, from talking with some people I hear the 80mm doesnt tend to get as hot (intake temps) as the 75mm and is around $200 more than a S475.

FYI, I had a 383 LT1 with a garret T6 from a semi, measured around 73mm with a open 0.96 a/r. Spooled around 3200 and was seeing full boost (10psi gate spring) around 4000rpm.



Jay

beta383

This is mostly going to be a track car on e85 thats probably going to be driven to car shows on the weekends. My cousin (matt) would be happy with 800-900whp.

Is every one running water cooled turbos or oil cooled? Because if its water cooled wouldnt it need an ice box? Sorry again if these are dumm questions this is our first carbureted motor..

Jay_rich

iTrader: (4)

Most run journal bearing oil cooled turbo's. Most ball bearing water and oil cooled turbos usually double the price. I dont think Borg warner even has a water cooled turbo in the 400 series. I could be wrong though.

I think you are mixing up air to water intercoolers with water cooled turbo's. water cooled just hooks inline with a coolant source from the motor. People with Ice Boxes are running A2W intercoolers.

Jay

beta383

Going to go with gale banks tt kit

Orr89RocZ

iTrader: (20)

That motor aint making 500 crank hp with that comp and cam lol

Banks may have manifolds but not sure if they will fit. Not aware of any kits. Most systems for these cars are all custom.

DIGGLER

iTrader: (1)

banks manifolds will fit. my car had that setup back in the day. used on center t04b turbos.

beta383

Here is the kit..

http://www.jegs.com/i/Banks/139/21107/10002/-1?CAWELAID=1710638400&CAGPSPN=pla&catargetid=230006180000849356&cadevice=m&gclid=COy1j9uSpMMCFSwV7Aod8lkA5w

And ok soo based off the comp. And cam specs how much hp to the crank do u think it has? Just a rough estimate if possible. Im going to the garage tomorrow ill get more specifics and ill post some photos.

im just goin off what im being told from my cousin. I was told Its a crate engine that was made to handle forced induction. Hes been on this project for cuple years now im just jumping in now..

These oldschool cars are totaly difrent animals then what im used to. Lol. My first project was a 95 3000gt vr4 with 625awhp on E85 that got put into the woods street racing lol. Didnt learn my lesson. My second project was 05 srt4 acr that never got finished and I ended up selling it. Needed money quick. the plan for that was 500whp. Its been a cuple years now and I was thinking bout starting my own project again but on an older american car so I jumped on this project to see if it was realy something wanted to do. So thats my story.

beta383

Diggler how did u like the set up? What were u making for hp? What internals did u go with?

DIGGLER

iTrader: (1)

It was a friends car when it had the banks stuff on it. Made a little over 500 at the wheels, but that was pretty low boost like 8psi or so. It had an ooooold accel dfi on it and he didnt know how to tune it so it stayed at that level. Had cats on it, passed emissions and had a sticker in the windshield which was pretty impressive for the early 90s. Engine was a 4 bolt 358 with forged crank h beams and weisco pistons. Ported sportsman 2 heads. Had a fairly small hydro flat tappet cam at that time. When it was dynoed, it may have still had the tpi intake onit, too.

Orr89RocZ

iTrader: (20)

Those turbos are small arent they? Can you get a bigger compressor in there? 800-900 whp takes a decent sized turbo and should have a p trim type turbine too which puts it in a larger t4 housing. My old setup had turbos out the hood cuz i couldnt get them to tuck

DIGGLER

iTrader: (1)

Yea t04bs would be completely maxed out by 800rwhp or so. Might could squeeze some of the 62-1 turbonetics hurricanes in there maybe as I think they are available with center inlet housings.

beta383

Any body have advice on the best low compression piston? I have a cuple in mind but just want some one elses opinion. As I recently posted car has 9.5.1 goal is 8.*.1 in that range. Will I be able to achieve this with just pistons or will I have to go deeper into the rotating assembly.

Also any thoughts on decompression plates. I know they cause a week spot on the motor and affect cam timing, but does anybody have any hard evidence that this is absolutely not the way to go threw personal experiences or knows somebody thats had problems with it. I know a diesel mechanic and he had told me that he has seen these decompression plates standard from the factory on semi's and on other larger commercial turbo diesel applications. Those engines are constantly under load and are working all the time so why couldnt this work on a performance based engines. Not saying this is the route im going just wanted to know some info on it..

beta383

Any body have advice on the best low compression piston? I have a cuple in mind but just want some one elses opinion. As I recently posted car has 9.5.1 goal is 8.*.1 in that range. Will I be able to achieve this with just pistons or will I have to go deeper into the rotating assembly.

Also any thoughts on decompression plates. I know they cause a week spot on the motor and affect cam timing, but does anybody have any hard evidence that this is absolutely not the way to go threw personal experiences or knows somebody thats had problems with it. I know a diesel mechanic and he had told me that he has seen these decompression plates standard from the factory on semi's and on other larger commercial turbo diesel applications. Those engines are constantly under load and are working all the time so why couldnt this work on a performance based engines. Not saying this is the route im going just wanted to know some info on it..

DIGGLER

iTrader: (1)

i would probably leave it alone for now and run e85. get the car together and start tuning on it. will probably be awhile before you made enough power to tear up what you already have.

Orr89RocZ

iTrader: (20)

Leave it 9.5 to 1 with aluminum head. Thats the perfect ratio

beta383

Thanks for the help..

Drac0nic

I will say they make bigger than 62-1s for on center stuff; I have a T66 on center sitting in the garage. It's not as easy to come by as off center stuff though. If I had the choice I'd definitely go with the Wrenchrat kit over the manifolds. The reasons are packaging and overall power. Not saying you can't make tons of power with the Banks manis by any means though.

JMO on this and there's lots of schools of thought. Don't sweat the compression, you may have to decrease overlap to reduce octane sensitivity at some point but I would skip out on "decompression plates" which I'm going to guess are thick HGs or something similar. Messing with quench is not my idea of a good choice.