High CR LS must have boost! Couple things I'm unsure about though.
 

Hey guys, I have a 93 dx hatch with an ls rebuilt with pr3s (~11.3:1 cr) and I've decided I am going to boost it. It won't be my first turbo honda, so I do have a clue. But I'm trying to think of how to go about my high compression.
I'm looking at running a t3/t04e at only 7-8psi....for the time being.

First of all, the car IS NOT daily driven. It doesn't have to be, I only drive it for fun.

I'm thinking it would be wise to lower the cr at least a little bit, but I'm not changing internals. Advice would be great. As in recommendation for a hg etc? Thanks.

Yes, I know tuning will be everything.

I've heard good things about torco race fuel concentrate. Would you guys recommend I run something like this?

And spark plugs. Do you think 2 steps colder will suffice? Cause I know high cr with boost will create a lot of heat, I'm guessing 3 steps is overkill, but figured I'd ask.

Would a sheet metal im help out? I've heard of them dropping iat's a decent amount.

Any other input or advice is greatly appreciated, really.

But NO, I'm not changing internals/motor, and YES I AM boosting it, so please nobody try to talk me out of it.


Thanks!!

Peter

Re: High CR LS must have boost! Couple things I'm unsure about though.
 

rope... >:(




just turbo it already. :y

Re: High CR LS must have boost! Couple things I'm unsure about though.
 

So one vote for boost it as is! It's an idea, but I might wanna do headstuds anyways, and if I do, i'd need to do a hg anyways. MIGHT.

Other input please?

Thanks.

Re: High CR LS must have boost! Couple things I'm unsure about though.
 

pr3's huh....im putting pr4 pistons in my ls motor along with a pr4 ls head. this is in a b18a1 block. no matter what my cr, im still going to turbo it. anything turbo is better than n/a. just hearing the bov/watsegate with open dump tube go off or the feel of a constant pull is enough to hook me into the turbo game.
headstud the ---- outta it unless you want head lift and warpage. also arp mainstuds and rod bolts would bea good idea since i know you are gonna rev it over stock as i am too. cost some money but all worth it in the end.

Re: High CR LS must have boost! Couple things I'm unsure about though.
 

Go with a thicker headgasket, and the head studs are optional. You are not going to lift a head before the stock rods let go, sorry. And, as long as you are on stock rods, the beam is way weaker than the stock rod bolts. Rev to 8500, unless the bottom end was mis-torqued/assembled the rod bolts will not fail, and at that rpm you're more likely to sling a rocker off due to LS head's design.

Re: High CR LS must have boost! Couple things I'm unsure about though.
 

e85, 105octane so you can drive it daily if you want to, check this out http://www.highaltitudeimports.com/t...bo-tuning.html ls/vtec put down 450whp on stock internals, just something to think about

Re: High CR LS must have boost! Couple things I'm unsure about though.
 

Wow, that's insane!! I had no idea an ls bottom end could sustain that. The torco race fuel concentrate i'm researching brings 93 octane to 107 when you add a 32 oz. bottle to 5 gal of gas. But it actually seems like good stuff, not like "m4D octane booster yo". It's a little pricey, but not toooo bad. Hmm....so much to think about.

Thanks for all the input so far guys.

Re: High CR LS must have boost! Couple things I'm unsure about though.
 

PR4 pistons are stock ls pistons.....and a lot of the stuff you mentioned is good, but not necessary.

Re: High CR LS must have boost! Couple things I'm unsure about though.
 

thicket hg, maybe some meth injection(or w/e injection you want)

Re: High CR LS must have boost! Couple things I'm unsure about though.
 

leave the comp ratio as it sits, and run methanol injection.