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Search: Posts Made By: JB440
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Forum: Do It Yourself, Boating on a Budget
07-22-2010, 08:20 PM
Replies: 15
Views: 2,899
Posted By JB440

Had the same problem, was a flat cam lobe......

Had the same problem, was a flat cam lobe... check rocker movement.
Forum: Do It Yourself, Boating on a Budget
07-22-2010, 08:17 PM
Replies: 10
Views: 4,059
Posted By JB440

Time it.. is it consistent? Once per rev?

Time it.. is it consistent? Once per rev?
Forum: Do It Yourself, Boating on a Budget
07-15-2009, 01:44 PM
Replies: 6
Views: 921
Posted By JB440

Assuming worst case conditions of 60degF air temp...

Assuming worst case conditions of 60degF air temp (conservative, since post-blower air will likely be much hotter), 29"HG barometric pressure, 11:1 AFR, and 133% voleff (5psi boost ~ baro + 1/3),...
Forum: Do It Yourself, Boating on a Budget
06-24-2009, 10:25 AM
Replies: 5
Views: 1,108
Posted By JB440

Thanks guys. It has a Merc 600 air filter on...

Thanks guys. It has a Merc 600 air filter on each motor.. I'll have to get more details, it must be a 525 w/ a smaller blower pulley or something, claiming 600hp.
Forum: Do It Yourself, Boating on a Budget
06-23-2009, 05:12 PM
Replies: 5
Views: 1,108
Posted By JB440

Merc 600 SC

Looking at a boat with a pair of Merc "600hp" blown motors.. all the 600SC's that I've seen have 2 holleys, these only have a single holley. It's an early 90's boat, and the motors are not original...
Forum: Do It Yourself, Boating on a Budget
08-27-2008, 08:00 PM
Replies: 25
Views: 11,695
Posted By JB440

Hey guys, thanks for all the input. I ended up...

Hey guys, thanks for all the input. I ended up going with crane pn# 132561. I wanted to get back on the water without spending a bunch of cash or tearing the heads off. The stock spring pressures...
Forum: Do It Yourself, Boating on a Budget
08-12-2008, 08:27 PM
Replies: 25
Views: 11,695
Posted By JB440

454 cam replacement

I've read a ton of posts on this, but still haven't found what I'm looking for.. does anyone have the specs for a stock '89 454 mag cam? The manual has lift, but no duration, centerline, etc. Also,...
Forum: Do It Yourself, Boating on a Budget
07-21-2008, 08:11 PM
Replies: 9
Views: 1,939
Posted By JB440

Found a leak in the intake gasket.. haven't...

Found a leak in the intake gasket.. haven't replaced it yet, but I'm thinking this has to be it. The extra air would cause it to go lean and explain the knock and loss of power. The pickup on the...
Forum: Do It Yourself, Boating on a Budget
07-19-2008, 09:55 PM
Replies: 9
Views: 1,939
Posted By JB440

Figure this out...

'89 Formula / 454 mag...
Runs great for about 5 min (until hot), then power drops out. The engine bogs down, and I loose 500-1000 rpm, randomly in and out.. with a small amount of knock. My first...
Showing results 1 to 9 of 9


 
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