<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MiraiZ &raquo;</TD></TR><TR><TD CLASS="quote">call me dumb...but isnt the throttle response dictated more by the head and how much it can flow air, rather than the compression.</TD></TR></TABLE>

Nothing dumb about what you said seeing as it's true, however, compression also plays a huge part in...well...let's call it "engine response".

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">By the way, I am running 8psi on 9:1 pistons and my throttle response is tons better...</TD></TR></TABLE>

8 psi + 9:1 static compression = lots of compression in the cylinders . If you had 14:1 pistons, your engine/throttle response would be insane. Off boost, though, your 9.1 CR engine won't respond to depressions of the throttle as swiftly as would a high compression motor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Johnyquest &raquo;</TD></TR><TR><TD CLASS="quote">You NEED FORGED PISTONS. DO NOT build a motor with stock pistons.</TD></TR></TABLE>The block was a Benson sleeved, cp pistons, manley rods and a benson micropolished and balanced crank. The point was it is low compression ratio with no turbo YET but still making power.

 

droping from the stock 9:5:1 isn:t ganna be a big differance. if i were u i would look for some 9:5:1 or 10:0:1 compression forged pistons. and your ganna want forged rods, darton sleeves or Rs sleeves. also lower compression makes for harder/longer starts, and slower spool times. if your going to run road racing keep stock comp or someplace in the 9s. 8s are way to low for a honda. i prefure as close to 10:1:1 as possable but thats me. 20psi on 9:5:1 will spool quicker and give u plenty of out of boost torq that the b18a/b is known for.
a set of Crower 404 cams would be great and with Crowers springs and retainers 8500 rpms would still be making power giving u a longer powerban to use your turbo in.

can;t remeber the stock comp is it 9:2:1 or 9:5:1. corret me if im wronge.

 

I see the confusion...the 271 number is purely coincidence...I was at the actual dyno and the dude made 271 at the wheels...the car "looked" stock (muffler, intake, even the filter...and it limited out at 180km/hr, so stock ecu too) ....the car made 271whp..I remember this number because I remembered thinking that I had his car beat. Please keep in mind that the JDM evos do make more power than the USDM ones

 

slow reving and crap throttle responce from low compression...... you arent doing something right. you can EASILY make up for the supposed loses going with lower compressoin by adding timing. i wish i had videos of the civic (around 7.8:1) reving. it sounds like a damn f1 car if you punch the gas while idleing. its on the 8500 rpm limiter almost before you can take your foot off the gas. and full boost is around 5000 rpms. rember the more GAS you burn the more power you will make. lower compression means you can cram more gas in there AND run alot more timing. you have more stuff burning for a longer period of time.

you cant compare a 4g63 to a honda motor. they dont have the rpms or the flow to compete with a honda motor. that and they have tiny turbo's.

 

correct and most slow spool problems refer back to having too large of an exhaust side on the turbo rather than a low compression ratio. It's all in the combination. It is tuff to argue with people that have the philosophy that bigger is better.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by earl &raquo;</TD></TR><TR><TD CLASS="quote">I think he uses a Hondata but I am not sure what else. You might want to IM Todd (Porsche997) directly. He has a Porsche with a rear engine Chevy V-8 in it also but he only drives his Honda. haha</TD></TR></TABLE>

My set-up: Manley rods, JE pistons with 83 mm bore, stock b16 head, upgrade valve springs and titanium retainers, gsr cams, 66 mm throttle body, stock b16 intake manifold, stock exhaust manifold, hi-flow cat., magnaflow exhaust system, p28 ecu with mugen program, ice-man intake. msd ignition. I have not run hondata yet.

 

imo i think it depends on the application. i have a h23 with a 8:1 headgasket on it and the power band is very linear. no lag @ 8.5psi

http://www.cardomain.com/id/boostlee