Baffled

[Track Junky]

Originally Posted by Sieg

Fuel pump pick up?

MSD boxes aren't exactly known as bullet-proof reliable so definitely can't rule that out. But typically don't they just have a major coronary and go to the grave?

.........new fuel cell installed.......and this problem occurred?

Car ran great at Sonoma after all the recent changes Sieg. When I brought her home from Sonoma she sat in the trailor for a couple of days and then I took her to a local shop for a rear gear change.
Noticed issue after the shop made the rear gear change.

[clill]

What gasoline is in it ? Can it be crap gas ?

[Sieg]

What gear ratio before and after?

[Track Junky]

Originally Posted by Sieg

What gear ratio before and after?

3.42 to 3.73

[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.

[Track Junky]

Originally Posted by clill

What gasoline is in it ? Can it be crap gas ?

I was running out of fuel trying to figure this out so I picked up 5 gallons of 114 at Sonoma last week and through it in yesterday. We'll see.