bayliner hotrod project, help w/ top speed!!

[Tail_Gunner]

Re: bayliner hotrod project, help w/ top speed!!

Interesting on the cam discussion. I ran a mild, 0.501/0.527 lift, 280/290 duration cam, which I believe was 224/234 @ 0.050 lift, in my jetboat's 454 with log manifolds/snails. I used Rhoads lifters to scrub some of the lift/duration at idle. Never had an issue with reversion, ran her for 6yrs that way before selling her last year.

Much has changed over the years......Heres a old conversation but very relavent to reversion...However back then cam tech was still very primitive sort of.....

http://forums.iboats.com/showthread.php?t=40096


PLZ Note: It can,+ Will suck water back into the cyl.s if a cam with an LSA(Lobe Separation Angle) of over 112* is used... marine cams have LSAs of 109* to 112*......<br /><br />Vinny's dislike for roller cams Probably stems from people using aftermarket

Seems like old Bondo was ahead of his time....

 

[jperki00]

Re: bayliner hotrod project, help w/ top speed!!

hey everyone thank you so much for your help. here's what i've done and about to do.

cam is on its way should be here friday i'm gonna try and get things switched out this weekend. comp cams 262 xtreme marine camshaft,@.05 in.218 ex.224 lift in.462 ex.477

also ordered a drive shower.
hey tim please tell me more about those tabs

 

[dannyual767]

Re: bayliner hotrod project, help w/ top speed!!

ported and polished set of double humps,2.02int & 1.65 exh. milled 62cc. i've gasket matched all the intake and exhaust ports for smother air flow, dual plane intake. 650 holly. 1.5 roller rocker arms. flat tapet cam.

4340 external balance steel crank, 4bolt mains. standard I-beam rods. rods & pistons have been weight matched to.

i know what i want my lift on the cam to be. whats a safe number on the duration not to have to worry about water reversion?

Very interesting topic. I'm always thinking about something like this when my 5.0 220hp carbed engine gives out.

Anyway, I'm sure you meant internal balance for your built 355's crank.

 

[Tommywalton]

Re: bayliner hotrod project, help w/ top speed!!

This is the kinda stuff I like to read!

 

[jperki00]

Re: bayliner hotrod project, help w/ top speed!!

hey guys i just wanted to update you on the project, i got the engine in and the thruhull exhaust cut. i'm gonna work on it tommorrow and maybe i can get a startup. thanks guys i'll keep you posted