racing gas

01ir#864 · Post by **01ir#864** » February 28th, 2004, 8:11 pm

ill be going to the track next sunday for the 1st time since ive had my 01 r i was wondering if the high octane gas they offer at the track will hurt my motor if i run it? one more thing is it worth it to empty the stock cat?

Bbasso · Post by **Bbasso** » February 29th, 2004, 12:26 am

Don't bother with the High Octane gas, and what do you meen by empty the stock cat?

01ir#864 · Post by **01ir#864** » February 29th, 2004, 12:27 am

unbolting the stock cats and knocking all the shit out of it

revolution8k · Post by **revolution8k** » February 29th, 2004, 1:12 am

01ir#864 wrote:unbolting the stock cats and knocking all the shit out of it

that=illegal

01ir#864 · Post by **01ir#864** » February 29th, 2004, 10:42 am

oh and putting a testpipe on isnt i dont care if its illegal is it worth it thats all i care about state of kansas=no emission test!

grrlie · Post by **grrlie** » February 29th, 2004, 2:21 pm

bbasso wrote:Don't bother with the High Octane gas

I agree- with what you'll blow in the cost for the gas- the $ would be wiser spent buying some fuel jugs and bringing regular pump gas in- we don't even race with race-track high octane let alone use it for track days...

Bbasso · Post by **Bbasso** » February 29th, 2004, 2:37 pm

Oh Ok, if you want to destroy a 900 item and cause the CEL go right ahead.

But doing that will bring nothing but headaches.

Oh and as for removing your stock cat from a car... I do believe its still illegal in a non testesting area.

ITR640 · Post by **ITR640** » February 29th, 2004, 7:57 pm

I heard about Integra's having there check engine lights come on when the cat has been tampered with. I don't know how true that is but by doing that you run a risk of destroying your engine.

A friend of mine a GSR with no cat and he is having to rebuild his engine after about 40,000 miles from removing it.

Also are you going to heartland park, I'd be interested in watching or even running my R.

B2FiNiTY · Post by **B2FiNiTY** » February 29th, 2004, 8:49 pm

Dont' waste your money on the race gas.

Get a real straight pipe if you plan to run no cat. Gutting a cat doesn't improve your performance nearly as much as a straight pipe.

Justin Klemgold · Post by **Justin Klemgold** » March 1st, 2004, 1:19 am

OK...race gas = pointless unless you are running compression that requires it...I'll get to the point...you aren't....don't use it.

Gut the cut, get a test pipe, destroy the environment, continue to be an idiot...

jiahanhao · Post by **jiahanhao** » March 1st, 2004, 8:43 pm

Catalytic Converters:
The catalytic converter, as it was originally introduced, was a large chunk of exotic metal that would in theory catch unburned fuel and combustion byproducts and break them down to produce cleaner running vehicles. They were also, at conception, MAJOR exhaust system restrictions causing severe loss of power. After many people gutted or removed their cats, the NHTSA stepped in and set a standard that the cat can NOT exceed 10% of total exhaust system backpressure. What does this mean? This means that the catalytic converter today is of minimal flow restriction and will always, when functioning properly, outflow what the engine is capable of producing in terms of airflow. The catalytic converter still functions basically as a honeycomb of exotic metals that, once heated creates a second combustion event burning unburned fuel, breaking down NOX, HC and CO emissions. Removing the cat, aside from being a federal offense, punishable by extreme fines, as well as in some states, impound and siezure of your car, is not going to magically free up horsepower as it would in days past. It will usually hurt performance to remove the cat, as well as severely impact your wallet if caught. There are numerous high flow, aftermarket cats available for very reasonable prices if you require one with larger than stock inlet and outlet diameters, and I would strongly encourage anyone looking for more flow to check them out.

I forgot where I got this from. But test pipe won't get you more than a few hp...

Justin Klemgold · Post by **Justin Klemgold** » March 11th, 2004, 12:48 am

import_trung wrote:if its a battle for top times then maybe

LOL, higher octane fuel doesn't make you faster man...stop being a slave to the hype.

revolution8k · Post by **revolution8k** » March 11th, 2004, 1:24 am

as for race fuel, nah, not unless you've minimized da variables in the car like excess weight, and plus its only a track day, if its a battle for top times then maybe

I'm hoping you meant "not unless you've got some sort of FI on your motor" ...

Erik B · Post by **Erik B** » March 11th, 2004, 9:15 am

Justin Klemgold wrote: LOL, higher octane fuel doesn't make you faster man...stop being a slave to the hype.

HUH?

George Knighton · Post by **George Knighton** » March 11th, 2004, 9:23 am

01ir#864 wrote:ill be going to the track next sunday for the 1st time since ive had my 01 r i was wondering if the high octane gas they offer at the track will hurt my motor if i run it?

There's different types of high octane petrol offered, and some of the highest octane will damage your cat. There's really no point in running higher than normal "premium" fuel.

one more thing is it worth it to empty the stock cat?

In a word, no.

You make a lot of noise w/out making any horses unless you're willing to tune the car for the extra flowthrough...and the "extra" flowthrough isn't going to be as good as you think because an empty cat is not an efficient transporter of exhaust gasses.

For whatever it's worth, my ITR is almost exclusively a track vehicle, and it still has a cat and runs on normal street premium fuel.

George Knighton · Post by **George Knighton** » March 11th, 2004, 9:27 am

jiahanhao wrote:I forgot where I got this from. But test pipe won't get you more than a few hp...

Not even "a few."

The only place I've seen "a few" defined was in the Bible ("...a few, that is eight."). So you won't be anywhere near "a few."

LOL...

Justin Klemgold · Post by **Justin Klemgold** » March 11th, 2004, 12:20 pm

Erik B wrote:
Justin Klemgold wrote: LOL, higher octane fuel doesn't make you faster man...stop being a slave to the hype.

HUH?

What? Unless you have some crazy high compression, or some high hp boosted setup...high octane gas does nothing. N-o-t-h-i-n-g....there was a dyno floating around from Austin who dynoed his car on premium, and then on race gas, and his car was worse on race gas.

Race gas burns slower, that's because it's higher octane...simple idea if you ask me.

Chris N · Post by **Chris N** » March 11th, 2004, 2:55 pm

Don't waste your money.

You won't be able to tell.

You could advance your timing a bit more, but without testing it all on a dyno, what is the point?

Higher octane only works if your engine is set up to support it. That is, higher compression, stuff like that.

goern-R · Post by **goern-R** » March 11th, 2004, 3:10 pm

Not to stir anything up, just state another's opinion-

Dave Rock, a very competent AZ autocrosser who drives an '03 Celica GTS in STS, uses race gas for almost every event he attends. He puts it in, drives about 50 miles to get the ECU "used to" the higher octane, and races. He claims that not only can he feel the difference, but he'll break the tires loose when the big cam comes on in 1st.

:shrugs:

I don't know, as I've never tried race gas, but he firmly believes that his and our higher compression really benefit from higher octane gas.
Mind you, we only get 91 octane here in AZ as our best pump gas.

Justin Klemgold · Post by **Justin Klemgold** » March 11th, 2004, 7:37 pm

Sweet! He goes by butt dynos!

SLCTyper · Post by **SLCTyper** » March 14th, 2004, 4:24 am

Don't bother with the race gas. Contrasting what someone said, it WILL make you faster, but it's not a magic juice. Your car has to be tuned for it to produce horsepower and torque gains. In other words, filling your ITR up with it at the track is basically a waste of cash. As far as the cat goes, it really isn't worth the effort to strip it out. Power gains from having no catalytic converter are VERY minimal if at all. I just sold my '03 WRX (which stock come with 3 catylitic converters) that was entirely straight piped a little while ago and other than a little extra pull on the top end, it basically wasn't any faster than it was with all the cats attatched. Plus you end up with headaches like a) not being able to pass emisions and b) the exhaust with no cats will turn your bumper black in a matter of days. The only way to get that crap off is to clay bar it. My .02 for what it's worth, just get yourself a good header and cat-back and stick with good 'ole premium.

pUrExTc · Post by **pUrExTc** » March 15th, 2004, 5:05 am

too high of an octane can be bad...

ITR640 · Post by **ITR640** » March 15th, 2004, 3:24 pm

Even if you run higher octane, the stock ECU will not raise itself to run the higher octane. The ECU is designed to run 91, i.e. bad tank of gas its actually 89 instead of 91 the ECU will degrade itself to run the lower octane and never recover unless you reset your ECU. So unless you run about a tank of higher octane, racing gas, then reset your ECU, then fill up with hogh octane again then the higher octane really wont do anything.
So if you run 91 or 92 all of the time and then switch to 100 its not going to do anything but empty your mpocket faster.

ITRCA

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