Quote:
Originally Posted by Pierre1967
Hi,
I have a vapor lock issue with my Firebird 67 400. I have just a simple braided line from the pump to the carb with AN fittings (see attached pictures).
Is it best to add a return line just at the output of the mechanical pump runing under front engine or to split the fuel line just before the q-jet inlet ? (or change the pump to add one with a separated return output line ?)
Any other options are welcome ! Thanks to post pictures of your setup !
Pierre
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Never had luck getting a mechanical pump ( even with a vapor return ) to work 100% of the time without some kind of stumble in very hot and slow conditions with todays gas….. in cool conditions and little idling it had no issues
Since my driving is almost always relegated to very hot conditions I tired of wondering when it was going to cough up a fur ball after a long light on a 90 degree day…
An electric pump cured that in short order….never looked back
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71 GTO, 463, KRE 295 cfm heads ported by SD Performance, RPM intake, Qjet, Dougs Headers, Comp cams HR 246/252 ...11 to 1 , 3.55 cogs, 3985lbs.....day three- 11.04 at 120mph ....1.53 60', 6.98 1/8 mile
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