Mr. G. Brettin's Slow Motion Leg Hump

gbrettin · 04-20-2023, 02:12 PM

And about 1 year later I finally make some power. lol. Project builds.... fun... yes. fun.

Made a little over 600whp on 16lbs of boost and 550tq. BUT, cyl 7 went cold, I ran out of fuel pump and the turbos need a rebuild. The turbos pushed oil and likely put oil on the plug of cyl 7 (I need to pull the plug to verify). The previous run made 12lbs made 540/540, so that's the last decent run for the turbo before it gave out.

How do I know cyl 7 went cold? I have EGT sensors hooked up and I saw the moment it went cool in the data log.

The fix? I'm getting new Bullseye turbos and will hook up my other Walbro 525 pump.

-Edit - The dyno pull was at 7000rpm and the engine should spin up to 9,000. The internal components should be able to take around 40psi.

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04-20-2023, 02:12 PM	#11 (permalink)
gbrettin A True Z Fanatic Join Date: Oct 2010 Location: Portage, MI Posts: 2,304 Drives: Tricycle Rep Power: 589452	And about 1 year later I finally make some power. lol. Project builds.... fun... yes. fun. Made a little over 600whp on 16lbs of boost and 550tq. BUT, cyl 7 went cold, I ran out of fuel pump and the turbos need a rebuild. The turbos pushed oil and likely put oil on the plug of cyl 7 (I need to pull the plug to verify). The previous run made 12lbs made 540/540, so that's the last decent run for the turbo before it gave out. How do I know cyl 7 went cold? I have EGT sensors hooked up and I saw the moment it went cool in the data log. The fix? I'm getting new Bullseye turbos and will hook up my other Walbro 525 pump. -Edit - The dyno pull was at 7000rpm and the engine should spin up to 9,000. The internal components should be able to take around 40psi.