Baffled

[Vince@Meanstreets]

just to rule it out try swapping out that RPM chip for a higher one.

Did you move your MSD ground wire? Run it direct from the battery.

[Track Junky]

It's starting to look more and more like Charlie nailed it. I ran the car today with the new batch of fuel till almost empty and it started feeling like it was getting better the longer I drove it. I get on it now and it doesn't start to hesitate/pop until the upper rpm range as opposed to when it would hesitate at initial throttle engagement. Seriously thinking I had a batch of crap gas in there at this point.

[GregWeld]

Race gas doesn't go bad like the sh!t at the pumps....


114 is a little strong.... Charley and I run 110. Gotta be careful with fuels -- more isn't always better. Ask Dave.


114 is for very high compression ratios like 14:1 and real high (8000) RPMS.... I don't think you're running that high of compression or need the extra protection from detonation at this level... LOL

[GregWeld]

Originally Posted by Track Junky

It's starting to look more and more like Charlie nailed it. I ran the car today with the new batch of fuel till almost empty and it started feeling like it was getting better the longer I drove it. I get on it now and it doesn't start to hesitate/pop until the upper rpm range as opposed to when it would hesitate at initial throttle engagement. Seriously thinking I had a batch of crap gas in there at this point.

I hate it when he's right.

[GregWeld]

Pump Gas Versus Race Gas
Octane rating is defined as the resistance to detonation a fuel has in an internal-combustion engine. The higher the number, the more resistance it has. That is why engines with higher compression require higher-octane fuel. As a result of its resistance to detonation, it has a resistance to burn as well. This resistance to burn is a non-issue in motors tuned to the edge; the edge being just before detonation occurs. When a pump-gas engine is subjected to a higher-octane race fuel, it may result in a decrease in power from an incomplete burn.

Read more: http://www.popularhotrodding.com/tec...#ixzz37OfIyWcx


Conclusion
Filling your tank with high-octane fuel, when your engine runs fine with 91 octane, is a waste of money. In this engine's case, minimal gains were achieved after a dozen dyno tests were made, and would be too small to notice at the track. The higher 118-octane fuel made less power than both the 110 and 91 octane. It would be interesting next time to see what effects the fuel has on a boosted engine. We would expect to see more impressive changes there.

Read more: http://www.popularhotrodding.com/tec...#ixzz37Og87p1u

[Track Junky]

The last 5 gallons I put in the car prior to this last fill was from a local station in Placerville. He was down to the bottom of the barrel with 110 and had to tilt the barrel to get me 5 gallons.

BTW, my engine builder is the one that recommended 114 and my compression is 14:1.

[GregWeld]

Originally Posted by Track Junky

The last 5 gallons I put in the car prior to this last fill was from a local station in Placerville. He was down to the bottom of the barrel with 110 and had to tilt the barrel to get me 5 gallons.

BTW, my engine builder is the one that recommended 114.

He doesn't know what he's talking about. Unless it's tuned and dyno'd on 114... the whole gas and octane thing is so misunderstood.


I think Dave's engine builder is the one that talked him into blending race gas with his pump gas.... that was good for about a day's worth. LOL

[Vince@Meanstreets]

I agree, stick with what you know works.


Without knowing how long that tank was sitting or if it was refilled. You have no idea what to expect.

[Track Junky]

Originally Posted by GregWeld

Race gas doesn't go bad like the sh!t at the pumps....


114 is a little strong.... Charley and I run 110. Gotta be careful with fuels -- more isn't always better. Ask Dave.


114 is for very high compression ratios like 14:1 and real high (8000) RPMS.... I don't think you're running that high of compression or need the extra protection from detonation at this level... LOL

I repeat......my motor is 14:1

[Track Junky]

Originally Posted by Vince@MSperfab

I agree, stick with what you know works.


Without knowing how long that tank was sitting or if it was refilled. You have no idea what to expect.

Get some sleep Vince.....your not making any sense