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Originally Posted by RGPIII
(Post 4625345)
Yes we went with the AFR 335 heads. I've been told that as well about the pumps. Just very strange how we didn't have any issues last year and now we do. I didn't get down there last night to mess with it, I hope to this evening.
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Originally Posted by Sonichunter
(Post 4625266)
I tried the airtex as well but didn’t like how the ke fit with it. I’m going to swap water pumps out with other engine to see if the problem follows. The more I’m reading, the more confident it may be the culprit. You wouldn’t suggest just changing water pumps, but fuel pumps too? I’ve always heard good about the KE lower. What carbs are you running? |
Originally Posted by RGPIII
(Post 4625348)
I'm thinking of adding a pusher electric pump in front of mine and seeing if that takes care of it. If its only pumps, which I am not as confident as you on that, but could be the issue. its happening on both of my engines.
What carbs are you running? |
Well as for our findings, new airtex pumps and KE upgrades- dropped to under 2 psi just getting on plane and wouldn't hold over 3 psi at anything over 4000 rpm. we switched the pumps and KE upgrades back to the ones we ran last year. Held 7 psi getting on plane and never dropped below 5.5 psi at 5000 rpm. Still chasing a few hundred rpm but we will get there.
so don't assume that just because the pumps are new that they will be better. |
New Airtex not keeping up, very good to know, thanks for the note.
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