I've got a GSR, built, with hi compression pistons, was wondering if I were to turbo it, would the pistons have to be switched out, and besides fuel system, would there be any other real serious work that needs to be done?
Your High Comp pistons would have to go for any chance at a normal tune. I assume you are already running with high octane gas so your High Comp engine doesn't turn itself into a diesel and start knocking.
Even with stock compression, you have to work to make sure you don't run into detonation with a boosted setup.
Your power goals & turbo size will tell you exactly what you need to mod outside of your turbo kit.
Well, right now its putting down 183whp and 170 lb ft, i do run 93 octane, and im really only hoping to get 250-275 whp so its still daily driveable but i want some more power for more fun.
Just lurk around the forum and check out various boosted setups and such. I'd start with taking your motor back to stock compression....(I've seen a couple serious boosted projects running high 9:1 compression or 10:1 but running serious water/meth injection).
If you only want 275whp, you'll read that your stock bottom end can handle that no problem with good tuning.
And a question about your all motor setup......170 wtq?????
You'll see when you start researching, that for ease of tuning and an overall boost build, many go with low comp pistons to help out with detonation. It's something you could do if you were building the entire bottom end to handle a very serious turbo build. But if you aren't looking for more than 300whp (which with a correctly sized turbo, and engine setup would be the most you'd want to go for a DD on street tires anyways), then no point in overhauling the entire engine....unfortunately for you, you may have to do that anyways if your CR is too high....which then you could decide whether or not to take advantage of the labour overlap and build it.
What is your CR? Is the motor stroked? Bored? Thin HG? Purely Pistons?
My buddy is doing a GSR Boost build, and there isn't a huge variety of low comp pistons. Basically 9:1 or 10:1 I believe (CP, JE) down from your 10.2:1. I could see a set of standard bore 81mm pistons for direct fit on your stock rods....especially if you do your own work.
But, if you have the budget, and you pay a lot for labour, my opinion would be to take advantage of having to overhaul the bottom end, and just stick in some hardware to let you turn the boost up without worrying about breaking something.
In your research, take a look at Fuel management (approporiate pump/injectors for what you want), and tuning (I assume you have that covered if you're making 183whp on a mild build)....and the appropriate sized turbo.
btw, what pistons did you use for 11:1? Aftermarket or P30s?
No prob. Lots of good info on this site. Enjoy the adventure
Takes time and patience to get all your stuff together both physically and in your head to put a good turbo build together.
Way too many people just rush into it, buy some turbo kit off eBay, don't look at what they're getting, and then are upset with the results.
That compression isn't too high to use, especially if it's forged pistons. The only thing it'll do is give you higher wHP for the same boost but make it harder for you to tune.
If you're keeping within 300 wHP you'll just use less boost to accomplish your goal. No need to change your your internals, that's just a waste for your power goal. ITR's can be boosted and they run similar compression. I'll be boosting and my JDM internals are 10.5 so no prob there.
Just boost lower and get similar results. 250whp isn't that hard to get with say 6-8psi from a turbo anyways. When it wears on on you, then rebuilt it with the 10:1 setup. Many people have stock GSR CR and have gotten monstrous power output from it.
__________________ An engine is like a penis... Size does matter.
Just boost lower and get similar results. 250whp isn't that hard to get with say 6-8psi from a turbo anyways. When it wears on on you, then rebuilt it with the 10:1 setup. Many people have stock GSR CR and have gotten monstrous power output from it.
I agree with this, but as you say, the high CR now is holding him back from running higher boost. I don't care what a person says originally for the limits they want to go for boost/power, I've seen time and time again, people always go over what they "said" was their goal.
It's just too easy to turn up the boost while you're at the dyno to get big numbers, and they come real easy with our motors. So I'd still recommend just going back to stock GSR, and then you don't have so many limits to constrain you when you are upset you can't do anything more at the dyno from a high CR.
Just sittin there at the dyno.....you just made 250whp at 6.5psi....you're sitting on a very conservative AFR.....lol, what else is there to do but crank the boost!?
Well I talked to the guy I bought the car from today and he said he still has the stock pistons, and if I wanted them I could have them free, so I think I'm gonna get a shop to put them in, and then see what kinda prices I can do a turbo for.
Linear Mode
