ITR.#1446

I am not necessarily new to turbo's but still don't understand what the size's of the intake and exhaust determine. Does the intake side determine amount of boost and exhaust determine spool time? Anyways i am looking for your help to determine which size i should run.

My setup is
stock sleeved gsr block with eagle rods and cp pistons stock bore
b16 stock head itr cams and valvetrain
full race ramhorn manifold
tial 44 wastegate
either an itr mani or victor x still haven't purchased
3 inch dp and exhaust
still haven't purchased injectors but assume 1000cc ???



So what size turbo should i be looking at a .57 or .60 trim that produces max power around 500 -550? I am looking at garrets and there is the gt3076r, the t3/60-1, precision's sc61 and the sc60 ect. what's the difference between these?

blinx9900

GT3076R is a goo choice but will start to get tired at 550whp, you may want to consider something slightly larger like a GT35R with a .63 housing. Or even a BW S256 or S258. The turbo's in power capability in order for you to consider are:

-GT3076R
-S256
-S258
-GT35R

taggart_lumpy

id say 35r so you have some room to expand

ITR.#1446

alright thanks for the input guys your right i def wanna get a bigger turbo so i can expand once i build my ls have it sleeved ect. So now who has the best deals on turbo's lol i can't find too many in the classifieds lately.


also is my understanding on turbo's correct or am i an idiot?

blinx9900

What do you mean? You seam to be on the right path from what i can see...

ITR.#1446

like what i said about compressor sizing on intake and exhaust sides and about spool up ect.

blinx9900

Oh i see, i didn't read that the first time, thats somewhat of an overly simple explanation but its not far from the truth, while the whole turbo's design predicts how much boost you can run the compressor section is very important and like wise a large compressor can slow down spool time but the real determining factor is on the turbine side.

TheShodan

iTrader: (14)

You'll also need to be more specific on your power goals, and you budget that you're willing to spend. "looking for deals", may not work for you if you don't understand the costs associated with each turbocharger. Or your budget needs are not realistic. Just the truth.

ITR.#1446

my power goal is to make the most hp i can with what i have done on pump gas, budget is pretty good and yes i know what turbochargers go for and that's why i asked who has good deals. If i can get a charger 200$ cheaper somewhere i would like to do wouldn't you? I also am fine buying one used if its good condition or if its priced right and needs a rebuild then i will rebuild it.

TheShodan

iTrader: (14)

This thinking will get you into trouble, FAST. You need to know what you're trying to do with the car, as well as the characteristics you're looking for. You could run a T70 turbocharger and get as much power as a semi truck in 5psi. But the power will be about the same, and you'll have about peak power for about 500rpms. OR you can be smart, check out the various options and find out what power you PLAN to run be it pump or race gas, and think about HOW you want that power delivered. No one can help you with your turbo choice without more information from you. It's your car, YOU have to spec this out.


Not if it is a substandard part, no. What is a "pretty good" budget? $1000 for one person is a drop in the bucket, while to another, its a house payment that went bye-bye.
OoooooKay.. Be prepared that if you know NOTHING about turbos, you may be purchasing a paperweight instead of something that can be rebuilt.

Give me a PM if you'd like about these available options; until then, you have some homework to do before you can get any REAL assistance..

Good luck.

a1320addict

iTrader: (1)

Your budget and desired powerband?

I'm all about making sure what you end up using gives you some room to grow, but it's a double-edged sword...what may work great now may be crap down the road, and vice versa.

BTW, your LS/VTEC kit and headstuds are in, tried getting in touch..lmk if you want to come by and get you setup with a turbo

TheShodan

iTrader: (14)

I also work with Speed-Theory. We can BOTH help with your turbo needs... Glad he's a customer of yours J... ;-)