Re: Drag Racing - Not pulling at top of gear

[Donald Gallimore <dongallimore@xxxxxxx>]

To respond to a number of questions:

The fuel pump is a Carter 4594 7psi 72gph street/strip unit that pumps through a 
3/8" fuel line through the mechanical pump. The pump is mounted in the rear axle 
well with the inlet located at about the top of the stock fuel tank.  


The tank was definitely below 1/2 tank - somewhere  between 1/4 and 1/3 
full.  Sounds like I need to add more but even if it does add more weight to 
this heavy car.

Power for the pump is through a 12 & 14 gage wire run directly from the battery 
to the pump through a relay. The battery is on a Battery Tender when in the 
garage.  Given six runs the first outing  and three runs the second outing, I 
don't think power supply is an issue. The car has a factory configuration of an 
alternator running off the water pump and crank. 

The cam springs have maybe six trips to the strip and maybe 25 runs on them, 
keeping under 6000 rpm.  It might be ignorance on my part but that does not seem 
to be many runs on a set of springs.

I will replace the plugs, check the wires for resistance and damage and replace 
the ignition module (unless someone can tell be how to test it). I do intend to 
run a compression and leakdown test. 


The dyno runs, peak HP was 359 at 5500, 350 at 5800, 335 at 6000 and 323 at 
6300. 

Any other thoughts/suggestions?


Akron Don Gallimore



----- Original Message ----
> From: Donald Gallimore <dongallimore@xxxxxxx>
> To: 1962to1965 <1962to1965mopars@xxxxxxxxxxxxxxxx>
> Sent: Sun, June 3, 2012 8:32:42 AM
> Subject: Darg Racing - Not pulling at top of gear
> 
> During my last two trips to the drag strip with my 440 powered '65 Belvedere, 
> I'm getting no acceleration at the top of each gear.  It's around 5500 RPM.  
> This is an engine that has gone over 6300 RPM on the chassis dyno a few years 
> ago and I have been shifting at 5700-5800 in the past.  Just seems to stop 
> accelerating kinda like you put your hand over the carb.  Seems a little worse 

> at the end of first gear. I installed a Carter electric fuel pump between 
>trips. 
>
> I do not have a fuel pressure gauge. 
> 
> 
> Someone suggested I needed a larger carb.  It's a 850 CFM AED 4150 carb which 
> would seem large enough.  I did check the clearance between the hood and the 
> carb top and it's 2" which would seem adequate, too. 
> 
> The car is running 12.35 at 108mph at 3800#.  
> 
> Any suggestions on where to look for a cause and solution to this issue?
>  
> Akron Don Gallimore
> 
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