I have searched but no answers to my questions. I have been building my motor to handle a good amount of boost, but I have not realized the limits of pump gas. Im not trying to see insane hp just yet. 91 octane is readly available here but; I can get 93 octane. But some time you just find it in some areas. what would be my limits 91 vs 93?
My setup is:
gsr built 10:1 cr
sc34 turbo
ctr cams
edelbrock man.
hondata s200b
680c inj.
UR cam gears
Rev springs/ retainers
etc.........

 

I would be scared running 91 octane in a NA 10:1 car.. If your running boost I would surely try to find higher octane and/or use octane booster..

 

I can get 93 octane. But; could I boost with w/ no problems on 93.

 

I ran 10.6:1 for a while on 8psi. With conservative goals you can do it. Hondata helps.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tgreaves &raquo;</TD></TR><TR><TD CLASS="quote">I would be scared running 91 octane in a NA 10:1 car.. If your running boost I would surely try to find higher octane and/or use octane booster..</TD></TR></TABLE>

Why? Every stock GSR and type R driver out there does it. The majority of the country has 91 as the highest.

On a non-stock turbo car I'd run as high as octane as I could get, but nothing over 100 for daily driving.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by whackassfawker &raquo;</TD></TR><TR><TD CLASS="quote">I ran 10.6:1 for a while on 8psi. With conservative goals you can do it. Hondata helps.</TD></TR></TABLE>
what kind of #'s you put down?
I thought I was going on the high side w/ 10:1.

 

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

Why? Every stock GSR and type R driver out there does it. The majority of the country has 91 as the highest.

On a non-stock turbo car I'd run as high as octane as I could get, but nothing over 100 for daily driving.

</TD></TR></TABLE>

Didnt think of that.. I only use 92 octane in my prelude and its NA..

My boosted crx only gets 104 octane race fuel though..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tgreaves &raquo;</TD></TR><TR><TD CLASS="quote">I would be scared running 91 octane in a NA 10:1 car.. If your running boost I would surely try to find higher octane and/or use octane booster..</TD></TR></TABLE>

r u serios??? so what about all these guys that boost there stock gsr's, Si's, h22's? i boosted 9lbs on 9.8:1 on 91 with no problem. I'm not saying there is no limit, obviously there is a limit. whoever you have tune the car should be able to find that limit.

Why are u wasting your money with 104 octane for 8lbs???

 

I know there is a limit.. I would never boost a 9.8:1 car with 91 octane.. There is alot more to the type of gas you run than the boost.. You can use a little crappy t25 on a civic and run 87 octane on it.. Try that with a t3 super 60 and see what happens even at the same boost level..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by flip1199 &raquo;</TD></TR><TR><TD CLASS="quote">

r u serios??? so what about all these guys that boost there stock gsr's, Si's, h22's? i boosted 9lbs on 9.8:1 on 91 with no problem. I'm not saying there is no limit, obviously there is a limit. whoever you have tune the car should be able to find that limit.

Why are u wasting your money with 104 octane for 8lbs???</TD></TR></TABLE>

what motor?

 

you'll be fine with the 91

 

i was referring to tgreaves. also my turbo was a t3/t4e 60trim .63a/r so it wasnt small. the average kit comes with t3/t4's and guys have no problem boosting 8lbs on there gsr's and Si's.

so to answer rocket256's question.. you'll be fine.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tgreaves &raquo;</TD></TR><TR><TD CLASS="quote">I would be scared running 91 octane in a NA 10:1 car.. If your running boost I would surely try to find higher octane and/or use octane booster..</TD></TR></TABLE>

Give me a break, i've seen 12:1 comp run on 91 octane before. I am running 10 pounds DAILY on a 10.2:1 B16 motor. 91 octane. This is my real daily driver, 35 minutes to and from work 5 days a week in the summer (and make no mistake i'm WOT a lot because it's a big wide open highway) and 30 minutes to and from university during the school year. I'm running a T3/60-1 and hondata S200.

 

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

Why? Every stock GSR and type R driver out there does it. The majority of the country has 91 as the highest.</TD></TR></TABLE>

That is what I was thinking

 

Yeah I've tracked my ITR on 91 octane (no boost). Sucks, but I didn't have problems.

 

i'll be almost 10.5:1 on an h23 with hondata

 

im running 10.5:1 on my setup and i have 93 and 100 here so.
Most likly im going to run 93 most of the time.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tgreaves &raquo;</TD></TR><TR><TD CLASS="quote">I know there is a limit.. I would never boost a 9.8:1 car with 91 octane.. There is alot more to the type of gas you run than the boost.. You can use a little crappy t25 on a civic and run 87 octane on it.. Try that with a t3 super 60 and see what happens even at the same boost level..</TD></TR></TABLE>

The t3 will prolly be safer. Its more efficent and will produce a colder, denser charge which is less prone to detonation.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rocket256 &raquo;</TD></TR><TR><TD CLASS="quote">
what kind of #'s you put down?
I thought I was going on the high side w/ 10:1.</TD></TR></TABLE>

230whp with 210flbs.

 

"Quote: B16coupe
Give me a break, i've seen 12:1 comp run on 91 octane before."

Was it boosted? Im sure that I can be proven wrong, but all that I have read and seen, I have yet to see a motor that can run 12.1:1 CR on 91 octane (on a Honda/Acura) accept with a standalone. I have seen blown motors that have tried without it, even retarding the distributer a huge amount and dumping in 94 oct. and jacking up the fuel pressure to 65psi... they were still getting knock in the higher RPMs. With your CR and 91 and proper timming and a/f ratio, your motor will be fine. Get it tuned on 91 and feel good knowing that you dont have to worry about it if you cant get a tank of 93....

Good Luck

Blaze

 

If this helps, I was running 450whp on 93 octane with 10:1 comp

edit - You really have to go with what your tuner says. Not all motors are created equal. Only one way to find out .

 

exactly

 

you guys are lucky as ****, CA only gets 91 at it's highest.

my friend has a ls/vtec with 11.7:1 compression and only an afc on stock injectors. When he dynoed his car his a/f mixture was near perfrect with 91 octane and no tuning. (feel free to check the CR on
http://www.c-speedracing.com/h...c.php
usdm oversized itr pistons, ls block b16/itr head milled .030, stock deck height
~11.71:1CR)

MY OPINION DO NOT BELIEVE EVERYTHING YOU HEAR OR READ. THE INTERNET IS A TON OF BS WITH LITTLE BITS OF TRUTH HERE AND THERE.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Twenty36_1 &raquo;</TD></TR><TR><TD CLASS="quote">
MY OPINION DO NOT BELIEVE EVERYTHING YOU HEAR OR READ. THE INTERNET IS A TON OF BS WITH LITTLE BITS OF TRUTH HERE AND THERE.

</TD></TR></TABLE>

AMEN!

 

this is crazy talk.... the S2000 is 11:1 comp stock...... recommended fuel = 91 octane......