Can anyone tell me what i would have to change an do to run avgas in a stock 5L?

remove the cat convertor, and tune to suit

Cats gone already lol when you say tune, do i just get a memcal thats tuned? Or a full dyno tune?

always better to dyno

Ok thanks mate!

Would it make much difference?

Quote: Originally Posted by Duke57TT [View Post] Would it make much difference?

Not sure but any kw gain is better than none!

Quote: Originally Posted by VN6BT1 [View Post] Not sure but any kw gain is better than none! I'm just thinking you may go backwards rather than forwards.... without the compression/camshaft/inlet manifold/heads etc etc I don't think it would be worthwhile. You can only try give it a go and let us know the results.

You will go backwards, the burn rate of avgas is very slow hence the high octane rating, But match cam and compression ratio and the slow burn rate will work in your favour. By just dumping avgas into your car and driving, your a/f will be incorect. There are also 2 different types of avgas avalible, what one are you planning on using?

Not sure what it is, a mate has a 351 clevo setup for the strip an i was just goin to pour it in an c how it ran but if it has a slower burning rate than normal petrol then your right, its pointless i also got told you need to run better fuel lines because they could melt or some **** ---------- Post added 22-03-11 at 15:35 ---------- Quote: Originally Posted by SHIZNT [View Post] Mite blow an enigne but who gives a **** its a 5L there everywhere Some original photos have not been recovered yet.

whats the story with using avgas in EFI cars? recall it ****s with O2 sensors and cant be used? how about cats? this will be in a modified 5L btw, im buying a drum of it, i know itll work for my VK just wondering if itll be compatible with my bros VL efi 5L too.

Its fine with efi cats and 02 sensors, it does not contain any lead or any other substitutes. Also fine with fuel lines. Only alcohol and methanol will screw rubber lines.

Quote: Originally Posted by Cocopopz [View Post] Its fine with efi cats and 02 sensors, it does not contain any lead or any other substitutes. Also fine with fuel lines. Only alcohol and methanol will screw rubber lines. I thought avgas was leaded.. actually im 90% sure it is. Which means it will completely **** ya cat convertor.

100LL avgas has about 1.5cc/L of tetra-ethyl lead in it. The old 100/130 had about 5cc/L.

Sorry i do stand corrected contacted mate at airport and he belives it is leaded.

Quote: Originally Posted by Cocopopz [View Post] Sorry i do stand corrected contacted mate at airport and he belives it is leaded. Lead is the entire reason why it became illegal... too many dolphins dying

how is it illegal, you can get a licence to buy it or I can get it through a mate who works at a airport.

You'd be better off converting to E85, or spray it with nitrous... you'll get way more power.