would you sleeve a block for 375-400 whp? im in the process of building my gsr ef hatch.would i be safe just putting in aftermarket pistons rods and maybe a block guard? it will be tuned by a reputable person who knows what he is doing. so yea should i sleeve my block or pistons rods and a guard? thanks in advance
ceejay

 

I decided to err on the side of caution and overbuild mine with sleeves. No regrets, the motor was rock solid, made 380-408 WHP and ran for years, sometimes doing 20+ passes/night and running on a road course as well. It's still running in the guy's car that I sold it to after I built my new motor (also sleeved). Lots of people make that much on stock sleeves with a good tune though, but lots of people blow their **** up too.

Cliff's notes: I would, even though it may not be completely necessary.

 

anyone else have any thoughts?

 

**** can happen when you least expect it reguardless of who tunes it. Fork out the additional $800-1000, sleeve it and be done with it.

 

be safe and sleve it

 

i ran around for 3 years with 350 whp sleeved, and glad i did overbuild it because i went apeshit on the turbo. do it once. and be done with it.

 

You're in Tampa? There are supposed to be lots of good tuners there.

I recently worked on a car John @ LHT assembled and tuned... it's super conservative in that he set it up to need racegas for the 400 whp high boost setting, but on low boost and BFG drags with cords showing the car ran 7.64@94 in the 1/8th last Thursday. Judging by the car, I'd say he could knock a safe 400 out of stock sleeves all day long, if you decide to go that route.

 

my GSR is bored over to a 2.0 and running the block guard. its been holding up great to 400. i wouldn't go over 500 on it. but i'll most likely find out how much it can really take.

 

i sleeved mine and wanted 400whp. Saves you from building it again and again and again...

 

one of the guys down here has oversized pistons and all that good stuff with NO sleeves and his is making i think 420hp dailey driven. i would probaly fork out the money but i mean his has been running a while. but its about protecting ur investment