Sweeeeet!!! - Page 2 - Ford Forums

'92BigBronco · 10-18-2003, 22:34

To each his own!

I find it hard to believe that a stock 'Vette runs in the low 14's. Seems a little slow to me. You can get a stock early 90's Mustang GT 5.0 5spd in the high 12's on motor with a simple gear swap.

89F150 · 10-18-2003, 22:53

okay found it most stock lightnings are running in the 13's

351w · 10-18-2003, 22:58

i got a magazine around here somewhere with a lightning vs corvette article and the lightning beats the vette in the quarter but obviously not on a road course because of the higher center of gravity.

89F150 · 10-18-2003, 23:07

but still thats some pretty good braggin rights.

351w · 10-18-2003, 23:10

hey if i had your 4.10's in my truck i would probably run low 13's .

351w · 10-18-2003, 23:16

well maybe not but 14's could be possible.

'92BigBronco · 10-18-2003, 23:16

On the bottle.....maybe.

What compression you running?

351w · 10-19-2003, 09:41

i dont know what the compression is actually (i never calculated it) but it is higher than it should be because i cant run reg unleaded gas in the beast.
when i try to it deisels during shutdowns and will not start when the engine is hot (due to firing on compression)
just a guess, that it might be in the 11:1 range.

'92BigBronco · 10-19-2003, 11:49

LOL, you must have an idea. You have the piston info, bore, and stroke, and cam card don't you? There's static CR and there's dynamic. What compression ratio you actually run at depends on the cam. Valve overlap and duration effect the compression ratio.

If you're running on pump gas (92 octane) you're probably around 9.5:1 at the highest. Any higher and you'd have to run a higher octane gas than you can buy at the pump. To run 11:1, you'd have to either buy AV or race gas or retard the timing to the point where it wouldn't make any power.

If you're dieseling, your carbs adjusted too rich or idle is too high.

89F150 · 10-19-2003, 18:24

Whats this deisleing? Is that where when you shut it down it keeps going for a couple of seconds after?