I need some help. i am wanting to use CTR pistons in my gsr block. i have stock gsr rods/crank and a b16 head with stock cams. i was wanting to know about what compression ratio would that put me at. I have read everything from 11.1:1 all the way up to 12.5:1 so any info that you have will be very helpful. thanks

 

http://www.zealautowerks.com/
This should help you out.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fergy016 &raquo;</TD></TR><TR><TD CLASS="quote"> http://www.zealautowerks.com/
This should help you out. </TD></TR></TABLE>

X2 thats a good website

 

wow- that gave me 12.74 to 1 and that is without the head or block being shaved. what is the highest that you can run with 93 oct pump gas?

 

doesn't the highst octane rating for pump gas only go up to 91? Isn't it 87, 89, and 91 octane at the pumps?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM se-R &raquo;</TD></TR><TR><TD CLASS="quote">doesn't the highst octane rating for pump gas only go up to 91? Isn't it 87, 89, and 91 octane at the pumps?</TD></TR></TABLE>

yes, in CA... i believe they have 93 pumps in other states and countries... but i've seen 100 pumps at some 76 stations here in CA

correct me if i'm wrong

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by I heart My EF Sedan &raquo;</TD></TR><TR><TD CLASS="quote">yes, in CA... i believe they have 93 pumps in other states and countries... but i've seen 100 pumps at some 76 stations here in CA

correct me if i'm wrong</TD></TR></TABLE>there is 100 octain pumps around here.but they say race gas on them

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 11KRedline &raquo;</TD></TR><TR><TD CLASS="quote">wow- that gave me 12.74 to 1 and that is without the head or block being shaved. what is the highest that you can run with 93 oct pump gas?</TD></TR></TABLE>

You can run that on pump. You'll have to pull timing though. So i would recommend two tunes then. One on 93 and one on race gas, so when you race you can have the most out of the high compression.

 

If you gonna run the car on pump gas, ditch the CTR's.

 

love the eastcoast for 93 octane

 

i seen a gas station in tennessee that sold 114 and it was only $4.25 a gallon. i took a 55 gallon drum up there with me the next weekend.

 

i appreciate all the info. i think i will use the ctr pistons and then try the 2 different tunes. also in order to run that kinda compression efficently and get the max performance - is there any major thing else that yall might recomend me use (etc. ignition, exhaust size- anything at all)?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4g hatch &raquo;</TD></TR><TR><TD CLASS="quote">love the eastcoast for 93 octane</TD></TR></TABLE> damn right

for the OP ive found that website to a little on the high side with their calculator. You can always adjust comression through the headgasket as well

 

This is actually what you want to look at...searching the archives is amazing isn't it?

https://honda-tech.com/zero...ge=11

Check back on the very first page of this thread link and you'll see that you're looking at about 12.58:1 compression.

 

If your planning on running 12:1 compression ratio it is advisable to get retuned on season change like winter-&gt;summer and vise versa to make sure your tune is reliable and not pinging. Fuel also changes in the winter which is a big deal.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4g hatch &raquo;</TD></TR><TR><TD CLASS="quote">love the eastcoast for 93 octane</TD></TR></TABLE>

Lucky bastards.

 

yeah...where is a website where i can find out my compression

 

right here : http://www.c-speedracing.com/h...c.php

 

umm how about octane booster + 91 octane can u use that with high compression? hahah

and for the guy who said u have to "pull timing" to make it run right.. what do u meen the cam gears? or the distributer thing?!