Boost referenced stock fuel pump observation

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Coyotemutt
Posts: 117
Joined: Thu Jul 30, 2020 11:18 pm

Boost referenced stock fuel pump observation

Post by Coyotemutt » Wed Oct 28, 2020 10:02 pm

I o-ringed my fuel pump pushrod when I added a turbo to my engine and I've had loads of trouble free miles so far.

But, today I was messing with things and decided to suck on the boost reference line for the fuel pump and got alot of fuel vapor. Does this mean my fuel pump is leaking? When I blow into it, it feels dead solid. Like blowing into a rigid pipe.

I wonder if this is why I'm limited to 13lbs (give or take) of boost.

Any suggestions on a quality replacement? I could switch to electric, maybe, but the same Brosol pump has worked for me for the last 17 years or so.

madmike
Posts: 2508
Joined: Mon Jul 24, 2006 5:11 pm

Re: Boost referenced stock fuel pump observation

Post by madmike » Thu Oct 29, 2020 5:43 am

switch to electric they move more fuel ,,I use blue & Black (red even works good too ,for smaller turbo motors) Holley's
kind of noisy though :roll: :lol: sure turns heads at the car shows when u go to fire up the engine :lol:

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panel
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Re: Boost referenced stock fuel pump observation

Post by panel » Fri Oct 30, 2020 12:32 pm

I think there is another link in this thread that might be worth a read.

viewtopic.php?f=3&t=149745
'65 Bus with a JDM Subaru EJ20 Turbo
Built by Germans powered by Japanese and brought together by Canadians

Coyotemutt
Posts: 117
Joined: Thu Jul 30, 2020 11:18 pm

Re: Boost referenced stock fuel pump observation

Post by Coyotemutt » Fri Oct 30, 2020 6:54 pm

panel wrote:
Fri Oct 30, 2020 12:32 pm
I think there is another link in this thread that might be worth a read.

viewtopic.php?f=3&t=149745
Thanks. That put things into perspective. Got a bigger picture view now.

I took the car out for a full throttle run the other day and instead of just mashing it flat out, I crept up on full throttle. The fueling kept up without issue under those conditions.

Someone else (I think it was maybe Bugguy) suggested I use larger inlet valves on the kadrons and I think it really is just that. On hard acceleration, the bowls immediately drain but on a slow roll-on I have steady AFR past peak torque.

I'll get to it in a couple weeks. Right now I'm holding down the fort while my wife tries to hunt down an elk.

madmike
Posts: 2508
Joined: Mon Jul 24, 2006 5:11 pm

Re: Boost referenced stock fuel pump observation

Post by madmike » Sat Oct 31, 2020 6:01 am

Elk?, I live in Atlanta,'Elk capital of Michigan' we have the biggest herd east of the mississippi,and they don't taste like 'sage',lol,,and Yes , larger inlet valve's 'May' help?

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