TPI gas cap to carb gas cap
Thread Starter
Joined: Mar 2004
Posts: 1,643
Likes: 50
From: Manitoba
Car: '91 GTA
Engine: 421sbc
Transmission: Powerglide
Axle/Gears: Ford 9" with 3.89
TPI gas cap to carb gas cap
I had a TPI engine previously
Switched to a carb with a Pro star 500 fuel pump.
Was the TPI gas cap non-vented?
Do I now need a vented cap?
Switched to a carb with a Pro star 500 fuel pump.
Was the TPI gas cap non-vented?
Do I now need a vented cap?
Joined: Mar 2017
Posts: 4,255
Likes: 427
From: Portland, OR
Car: 86 Imponte Ruiner 450GT, 91 Formula
Engine: 350 Vortec, FIRST TPI, 325 RWHP
Transmission: 700R4 3000 stall.
Axle/Gears: 9 Bolt Torsen 3.70
Re: TPI gas cap to carb gas cap
They will both be non-vented. The charcoal canister was implemented for both types of fuel systems. Evap systems were required by federal law since the early 70's. It hasn't been since before ~1971 that open fuel systems were using vented caps.
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