powercenter7

Hey Guys I have a 1.8 non sleeved ls vtec block with eagle rods built head with full valvetrain ported and polished with ctr cams.
Turbo is a sc 61, full race manifold and will be hondata tuned with 800cc injectors

Now I have 2 sets of pistons. I have 9.5:1 wisecos and I have 8:1 Probe Pistons.

Which set do you guys recommend I run, I having a hard time which ones to put it.
octane in ca is 91 and this car will be a daily driver. Wanna hear the difference between the two types of compression. You guys make the choice! Thanks for all the help!

lanojp1

CP 9:1...

what bore?

powercenter7

Its stock bore 81mm.

Sonny

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lanojp1 &raquo;</TD></TR><TR><TD CLASS="quote">CP 9:1...

what bore?</TD></TR></TABLE>

That's not one of his options.

I have 8.5:1 Endyn (Wiseco) pistons in my engine. The car is basically stock right now because of having to see the smog ref. I wish I'd gone with higher compression (around 9:1) because the engine is definitely soft down low. It helps that my car is really light.

Of those two, I'd pick the 9.5:1 pistons.

Sonny

b16sedan

I run 7.8:1 compression in my B16. The "gains" from high compression turbo setups have been massively, massively overhyped on honda tech. The spool difference is unnoticeable between stock 10.2:1 and 7.8:1, if there even is a difference. Every full point drop in compression is worth about 4% in power. A stock 170 horse GSR dropped to 8:1 compression with no other changes will net you about 156 horsepower. You're countering that with a ported head and CTR cams, which would EASILY make up a 15 horsepower difference from a stock motor. I didn't even see you're running an LS/VTEC setup at first, so that's worth another few horsepower and ft-lbs of torque over a GSR. Going with 9.5:1 compression, especially if you can only get 91 octane, is going to limit your power potential (and safety) on pump gas, because god only knows how much crap additives are in that gas. 8:1 will be safer, you MIGHT notice a slight decrease in power while on boost, but it's nothing to write a letter home about.

lanojp1

I have Endyn 9.2:1's in mine...84.5mm...

powercenter7

Thanks for the quick replys! Anyone else with experience? THis is good info. Thanks alot.

zulustypes

dude, get the higher compression if you're doing a daily driver.
Just look into a water/methanol kit for you highboost seeting.
I got one in my car and it works like a champ!
If you want more info on it, just PM me.

m R g S r

I agree. Go with the lower compression.

G"UNIT

I doing a rebuild on my built block and im going with lower compression. see how it works out

numba1

Just run the 9.5 comp. and use a cometic headgasket that is a little thicker or thinner to get your desired compression ratio, only problem is you my friend will have to do some MATH! hahahahahahhaha,listen to me DEREK come to the darkside, the power is GREAT. Oh yeah, wheres my abs unit? and i'm not paying 26.00 bucks for shipping! LOL, save me some MONEY, i'm broke right now.you like thats my signature bro. LOL.

89dxhunchback

8.4/1 and couldn't be happier with the choice, reliable 100K mile D16 on 10psi. Spool ?? wrx turbo with a 50-trim comp. wheel and 15 degree turbine clip.
0psi @1600-1700rpms
3psi at 1900rpms
10psi by 2700rpms
bone stock engine from the TB to the HF manifold.

RyanEJ8

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16coupe &raquo;</TD></TR><TR><TD CLASS="quote">I run 7.8:1 compression in my B16. The "gains" from high compression turbo setups have been massively, massively overhyped on honda tech. The spool difference is unnoticeable between stock 10.2:1 and 7.8:1, if there even is a difference. Every full point drop in compression is worth about 4% in power. A stock 170 horse GSR dropped to 8:1 compression with no other changes will net you about 156 horsepower. You're countering that with a ported head and CTR cams, which would EASILY make up a 15 horsepower difference from a stock motor. I didn't even see you're running an LS/VTEC setup at first, so that's worth another few horsepower and ft-lbs of torque over a GSR. Going with 9.5:1 compression, especially if you can only get 91 octane, is going to limit your power potential (and safety) on pump gas, because god only knows how much crap additives are in that gas. 8:1 will be safer, you MIGHT notice a slight decrease in power while on boost, but it's nothing to write a letter home about.</TD></TR></TABLE>

You are massively, massively wrong. 9.5:1 is not going to limit the power potential of pump gas very much.

Go with the wisecos.