[fusion_ta66]

I was wondering what the stock fuel line size would be on my 65 chevelle. I am going to be running almost 500 HP in my 454, and I am running a Holley mechanical pump. Do I absolutely need to change over to bigger fuel line? I will eventually, I am just wondering if I will be losing HP

thanks
Joe

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1965 Chevelle SS

 

[DaleM]

You probably have a 5/16" line...not enough. A minimum of 3/8" would be needed to feed that. You may not NEED the 3/8" line but you'll starve the engine at anything other than light cruising I would imagine.

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Dale McIntosh
TC Gold #92
ACES #1709
www.dalesplace.com
Restore it or customize it, but drive it and enjoy it!

 

[Mark 502]

Hey Joe! Got that RAT running yet?

It would depend on what engine originally came in your Chevelle as to what size line you have. If it came with a six or a 283 it's probably a 5/16. If it came with a 327 it's probably a 3/8. If it's a 5/16 you can buy a 3/8 sending unit from any resto house like Ground Up and replace it very easily. You will have to plump new 3/8 inch line to the front of the car but you will need it with all that horsepower. I would highly suggest plumping it with hard line using no more than 12 inches of rubber in the whole system and protect the section that goes by the bellhousing with a steel wrap or outer covering just to be safe and meet NHRA rules. I think they require 18 inches of protection! Easier to do it now than have to redo it later when it fails tech inspection. Hope this helps!

Mark

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<A HREF="http://www.chevelles.com/showroom/Mark50265ss-7" TARGET=_blank>65 MalibuZZ502/200R4/9inch
</A> 1 2 3 4
The 502
1 2 3
72SS/402/T400
97 Chevy Tahoe/Whipple Supercharged

 

[Strohm]

I would use the existing line until you find that you need a bigger line. If you mostly just cruise, you won't need anything bigger than 5/16". If it ain't broke, don't fix it.