I ordered a set of the coated wiseco's to at an 8.5:1 compression ration today in 88mm. My blocks already sleeved so im not worried about the whole forged piston in the FRM sleeve thing, My Last pistons were JE 9.0:1's but i couldnt get the size i needed since the sleeve has to be bored, My only question is am i going to have any problems outa these or any lost horsepower cutting the compression down a little????

 

yes.... you will lose a bit of power. I hope your FI to be dropping down that low...

 

i perfer cp piston

 

modified 9.3:1 wiseco pistons here

 

yup youll lose power are you going FI i take it ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by stinger &raquo;</TD></TR><TR><TD CLASS="quote">yup youll lose power are you going FI i take it ?</TD></TR></TABLE>

i dont think anyone in their right mind would go to 8.5:1 in a h22/h23 without going to FI. 8.5 would give..120 whp? if that...

 

Its arealdy FI, was running about 12 pounds on my T3/T4 Hybrid with FMIC, Hondata S200, 550cc Injectors, AEM Rail and pump,turbosmart controller, Crower crank, and rods, and a few other goodies, can i run a lil more boost? or can i just will the head down some?

 

Well u got a sleeved block with forged pistons and 8.5:1 compression. you should be able to go 15-20lbs on pump gas. if u want to boost more just add some c16. since your motor is built u might want to go ahead and get larger injectors so you dont max out your injectors when u up the boost.

 

what happened to your other pistons? you shoud have been running a good amount of boost then if it was tuned correctly. you shoud be good for 350 (17 to 20 psi) because of the injectors being your limitting factor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JTCdudeman &raquo;</TD></TR><TR><TD CLASS="quote">yes.... you will lose a bit of power. I hope your FI to be dropping down that low... </TD></TR></TABLE>

The power he'll lose in compression should be made up for in the increased displacement, since he bored the block.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by happylude &raquo;</TD></TR><TR><TD CLASS="quote">what happened to your other pistons? you shoud have been running a good amount of boost then if it was tuned correctly. you shoud be good for 350 (17 to 20 psi) because of the injectors being your limitting factor.</TD></TR></TABLE>

The original poster said his block was bored. Old pistons wouldn't work.

 

Ok lets start this over- I cant use the JE pistons one was scarred and i have to bore the sleeves that are already there, # 3 cyl, had a bad ridge-

I have a complete fuel management system already, with RC 550CC injectors, Hondata S200, AEM Rail, AEM Pump, All braided Lines, ect-

I was only running 7-8 pounds with my other setup witch was, JE 87mm 9.0:1's, Crower Crank and rods, With a sleeved and line bored h22a4 block.

Since im only goin down .5 on the comp. ration i dont see a huge loss. i will just cut the boost to bout 14-15 pounds.

I was hoping somebody can give me an idea of what kinda power im going to make with these mods i have-

RC 550cc injectors, AEM Fuel Rail, AEM Fuel Pump, Turbonetics T3/T4 Hybrid, Front mount intercooler with all hardpipes, Crower Crank, Sleeved Block, The Wiseco pistons, Turbosmart boost controller, Tial 38mm Wastegate, Greddy EVO 2 Full Stainless Catback- I got some other stuff but thats about it-

 

i figure you'll make 260 - 280whp with some nice torque because of the bore. Your exhaust will be a bottleneck. the rate of HP loss to CR point drop is about 10:1.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eMpAtHy &raquo;</TD></TR><TR><TD CLASS="quote">

i dont think anyone in their right mind would go to 8.5:1 in a h22/h23 without going to FI. 8.5 would give..120 whp? if that...</TD></TR></TABLE>


pointless post man. i was asking because most people know when you drop compression you lose hp.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by stinger &raquo;</TD></TR><TR><TD CLASS="quote">pointless post man. i was asking because most people know when you drop compression you lose hp.</TD></TR></TABLE>

the exhaust would be your bottleneck. everything under ur hood isnt carb legal so dont even worry about ur exhaust being carb legal. look at 3" piping with a test pipe and i'd run a resonator because if not, it's going to loud as hell.

what are ur goals exactily and are u planning to run this on the street? u could possibly run that ~20 pounds of boost on the street, but make sure u get it tuned before u do so. lean + detonation = cracked pistons. i'll sell you some cracked pistons if u want they're arias btw, but they would do no good besides beating urself in the head for buying a hunk of metal that is essentially useless. 20 pounds is asking a lot for pump gas. if u can get 100 octane easily where u live, go ahead. 91 is pushing it pretty far..maybe with retarded timings..talk to a tuner about this.

 

Nope this is going to be my daily driver, i dont wanna run but about 12-15 pounds on it, just wanna make some good hp and still keep it on the 93 outa the pump- So it needs to be reliable, I am gonna break my motor in on 7.5 pounds or so for about a week or 2 then have it tuned for what i decide on, the orig tune i have on it now is for 12 pounds so it will be ok 4 now, I have a stock or hight flow cat plus the one that is made into the greddy kit, and the resonator so im gonna get rid of that stock cat before i run it- should have it finished in about 2 weeks, I still need rod and main bearings to fit my crower crank since the turned it 10/10, its forged so im not worried about any problems i just need the bearings-