ok guys in the process of removing a block with blown rings, for the time being im putting in another stock gsr block in my **** to get around,,, quick setup rundown#98 gsr swap stock internals, 93 si hatch,, full Drag 3 kit, t3/t4, 550cc injectors, hondata 2b, tuned by boosted hybrid, cm clutch/fly, tial gate,,, now im looking to get a maximum of 18psi tops in the near future,,,, i am looking into pistons and rods,,, now will stock sleeves hold up to 18psi with the right tuning?? and will Eagle rods take 18 psi? also i was thinking of going with like 9.5:1 compression JE's any suggestions on that??? i also got arp headstuds and an S2 mani to use as well,, i was just wondering what kind of quality the eagles are,, or what max psi i can go to with them,,, somebody chime in here and tell me what they think,,,,

 

I have the same thing. I have a GS-R motor with the stock sleeves. I'm running 8.8:1 CR with Endyne Rollerwave pistons. If your goal is 18, go as low with the compression as possible. You'll put less wear on the engine that way. I would say 9.5 is high, considering that an LS motor is 9.2, and I blew one of those up on only 10 psi, of course it wasn't tuned at all.

The lower you go with compression, the less you have to worry about detonation with high boost because you can safely fit alot more air before you hit the CR that causes detonation. As long as you have everything tuned, I think it can handle it. I sure hope mine can.

If I were you, I'd got 8.8:1 or even lower.

 

well im thinking maybe with 9:1's that i could safely hit 15psi,,, what do you guys think? any comments about going with a compression ratio lower than 9 to 1? and can my t3/t4 efficiently work at 18psi? and do you know of any piston manufacturer that makes lets say 8.8:1's in stock gsr bore, off the shelf?? or is that a custom thing? thanks again

 

also how much and where did you get the endyn pistons from? thanks for the advice also!!

 

On lower c/r piston, you have to run more boost to make more power. Example, 15lbs on 9.8 c/r=350hp
15lbs on 9.1 c/r=320hp
these numbers are just a guess.

 

it's not the psi that kills motors guys, it's the tunning.

the eagel rods have been known to take well over 700 hp so @ maybe 400-425 hp your fine.

 

9:1 is fine for for 18 psi. (take it ez on timing, I run ~20 deg total)
Stock sleeves are fine for 18psi as well.

I tuned a B16a with 9:1 and it runs 18psi. running strong since November 2002.

Je pistons, Crower rods. 333whp @ 7800.
Stock sleeves with a block guard.
(make sure to re-bore AFTER you install a block guard)

Jeffrey Atwood

 

hey typeGS-Rturbo, hows throttle response and driving in low rpm's with the 8.8:1 pistons? does it feel like a DX off boost ? just wondering, cuz im thinking of going with that compression. and also, who makes 8.8:1 compression pistons besides endyne?

 

iv seen gsr motors make over 600 with stock blocks with pistons and rods... so it is possible

as far as lasting long... now thats another story

 

You can run 18psi on Stock sleeves/blockguard. Most of it has to do with tuning. Your stock sleeves don't handle a certain amount of boost, it is more the hp/pressure that will crack the sleeves. I have 400whp on my stock sleeves at 18psi which i run on occasion. I run 375whp daily. This is all pump gas.

 

400whp+daily on stock sleeves 8.8:1compression 10k milles on it still no prob just get your car well tuned

 

you guys are the ****, everybody is mad helpful in here,,, but another quick question, with the eagle rods, do i have to upgrade the rod bolts? ive heard something about that in the past can anybody refresh me on that??
thanks in advance
dave

 

well if you're upgrading the rods, why not upgrade the rod bolts? maybe ARPs would do the trick!

 

see sig

 

Don't worry about how much boost you can run. Reserve some dyno time and get your setup TUNED! das da key!

 

Throttle response in low RPMs is a little sluggish, I'll be honest. I would say between about 1000-4000 it feels like an EX, but as soon as that turbo is spooled at 4500, its like the tach needle just launches itself across the the gauge. The good part about it is that if you do launch low, you aren't throwing all of your power at the tires at once, meaning you keep traction all the way through your power band. I think Arias makes 8.8:1 compression, but I'm not 100% sure. I bought my pistons new, but second hand from somebody on honda-tech. I can't remember what I paid for them, but it wasn't extremely expensive.

The Eagle rods that I got came with the ARP rod bolts in them with a sheet from ARP specifying the torque (28 ft-lbs) and they even came with a little ketchup packet of moly lube.

 

ohohoh, I've 8.5:1 on my Z6 and if I WOT it at say 1500, it is dooooog slow until I build boost. But once the snails spool, the motor gets happy and comes alive!

 

how about 9:1 je on eagle rods with .20 on stock sleeves

no block guard will it hold up to 1 bar or 15 psi?

thanks

 

you're car will have no probs if it is tuned right. My friend has 9.5:1 running 15 psi on stock sleeves on pump gas all day long with Hondata.

 

Why would you go with such low compression that is pointless, which do you think has higher cylinder pressure a 8.8 motor with 18 PSI or a 9.5 or 10.0 motor at 10 psi. You should always try and make more motor power and use less boost power and your car will more reliable. Thats just my 2 cents but from what I have seen and delt with your car will make better power and have alot better power band with higher compression then with low compression..........................

 

search for 373 whp on 9 psi.. gsr motor, do that.

 

Just look at Jinx... 500+whp on a stock B18C1 block.. yea I think they can hold. It's all in the tuning.

Try to understand that it's relevant to the turbo in question also. 18psi on a T3 is NOT the same as 18psi on a 60-1.

 

you have your mind set all wrong.. dont think of how much you wanna boost .. think of your goal in whp..id rather have high compression and boost less... thats just my opinion.. but of course i can only get so much out if it... dont drop compression too low.. or it will feel liek ****

 

EXACTLY

 

why is everything on this forum looked at as boost numbers? will my pistons hold 10spi? will my rods hold 20 psi? Look at things in horsepower perspective...example, d-series rods are heard to be good for 200 crank hp roughly....well i turbo'd my d16, i made 205 whp which is probablly 215-225 range at teh crank....luckily my motor is built but point being i made that power on only 6psi? so all that talk about stock d-series holding 10psi is out the window....at 6psi i would have been pushing stock internals if they were in there....This is just a point im making, get a hp figure start off low and work up...get the hp you want, who cares if you make 300whp at 10psi? yur making 300whp!!! Dont plan boost plan hp....and yur motor will love you for it....peace

Trav