 Fuel Tank fittings, Anyone ever up the size of the supply fitting? |
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| Root_Werks |
 May 20 2021, 01:56 PM
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#1
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Village Idiot  Group: Members Posts: 8,321 Joined: 25-May 04 From: About 5NM from Canada Member No.: 2,105 Region Association: Pacific Northwest 
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Tank is pulled and waiting for a set of SS lines from Tangerine Racing.
Since I'm running a 2.7 with CIS, I have that large inlet on the fuel pump (think 1/2"). PO used an adapter to upsize from the roughly 3/8"-1/2". It's what I've done in the past myself and seems to be fine for a 170HP engine. Anyone know of a fitting I can put directly to the tank that's 1/2"? Would be nice to have that "garden" size hose supplying directly from the tank to the pump. Checkec TR's site, didn't see anything. |
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| bdstone914 |
May 20 2021, 02:30 PM
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#2
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bdstone914 Group: Members Posts: 4,523 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
QUOTE(Root_Werks @ May 20 2021, 12:56 PM)  Tank is pulled and waiting for a set of SS lines from Tangerine Racing. Since I'm running a 2.7 with CIS, I have that large inlet on the fuel pump (think 1/2"). PO used an adapter to upsize from the roughly 3/8"-1/2". It's what I've done in the past myself and seems to be fine for a 170HP engine. Anyone know of a fitting I can put directly to the tank that's 1/2"? Would be nice to have that "garden" size hose supplying directly from the tank to the pump. Checkec TR's site, didn't see anything. You can tap the inside threaded nipple of the tank to 1/4 pipe thread. You can install a AN fitting into it. Going to a larger fitting is only one item in the whole delivery system and will not gain anything. |
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| wonkipop |
May 21 2021, 02:53 AM
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#3
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Advanced Member Group: Members Posts: 4,318 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille
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makes sense.
yes, all pumps are weak on suction, strong on pressure side. the bigger the gravity feed the better, esp if you can fire it into a beast. i noticed an interesting detail rebuilding the late bosch pump on my 1.8. earlier wimp 4 cylinder cars had the bigger feed line that matched the bigger feed port on earlier pumps. in 1.8 (with 009 pump) they shrank the feed port but left the fuel line big same as earlier cars. worked out the pump sucked enough anyway and why not give it as much as it could take. ie - they were oversizing the feed line to the pump by 74 on the wimp engine. go big for sure. |
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| Root_Werks |
May 21 2021, 12:10 PM
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#4
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Village Idiot Group: Members Posts: 8,321 Joined: 25-May 04 From: About 5NM from Canada Member No.: 2,105 Region Association: Pacific Northwest
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Exactly, there's a reason Porsche has a 11mm inlet on a flat 6 2.7 CIS fuel pump. Would be nice to match that 11mm size from tank to pump.
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