Race gas

[J P Stein]

My rebuild this winter includes some Mahle 10.4:1 pistons. The motor is single plug and I'm gonna need race gas. So, what octane. I'm looking at Sunoco 100 unleaded.....good enuff? Sunoco 104 which may be leaded?

[Steve@Rennsport]

Sunoco 100 is fine; Sunoco 104 is also good stuff,.....both are unleaded.

Twin-plug that thing!!!!!

It pays big dividends in torque & throttle response.

[J P Stein]

Originally Posted by Steve@Rennsport

Sunoco 100 is fine; Sunoco 104 is also good stuff,.....both are unleaded.

Twin-plug that thing!!!!!

It pays big dividends in torque & throttle response.

Who.... me the CSOB?
The thing is a black hole in a parking lot........
Between the rebuild & an LSD, I'm tapped out.

[Britain Smith]

Is the improvement in torque and throttle response a function of the twin plug or the higher compression?

-Britain

[Steve@Rennsport]

Originally Posted by Britain Smith

Is the improvement in torque and throttle response a function of the twin plug or the higher compression?

-Britain

Both!!!!!

Two flame fronts and almost half the necessary ignition advance make a more efficient engine.

Added compression makes more torque, too.

Aside from the initial $$$, there is nothing bad about it and given the cost of $7-8/gallon race fuel, its a good investment.

[Britain Smith]

For JP's motor, will the tuning for race gas be significantly different than pump gas give that we are running 10.4:1 and single plug.

-Britain

[North Coast Cab]

At least get the heads drilled for twin plugs, only a few hundred dollars. Then down the road you can add the ignition set-up to take advantage of it.

[J P Stein]

The long block is together and it ain't coming apart......well, unless it does self disassembly.

Hay, it's a low rent 914 AX car not one of them purdy 9elebens.

[Steve@Rennsport]

Originally Posted by Britain Smith

For JP's motor, will the tuning for race gas be significantly different than pump gas give that we are running 10.4:1 and single plug.

-Britain

Not appreciably,...........

[camgrinder]

What camshafts are you running? and in what size engine? What octane pump gas do you have up there?

I love the Sunoco 100 GT.

[J P Stein]

Originally Posted by camgrinder

What camshafts are you running? and in what size engine? What octane pump gas do you have up there?

I love the Sunoco 100 GT.

Solex cams. in a 2.7L. a very good Autocross cam, I've found. It's wide power band is just the ticket. Mahle P/Cs @ 10.4:1. Our pump premium is 93.
It's not as pretty as the good Mr. Cramer's. ....

[J P Stein]

Another. One of the cams was NOS in the original package!
The other had been "touched up" by Web cams.
Note the plugged centeroiler passages. .....

[Steve@Rennsport]

Lookin' good, Gents.........