What Size Cam???

[NOTALENT]

Not to familiar with cam sizes for marine use..I am now ordering parts to rebuild my new 454..The other one as some of you know blew up!! well its just going to be stock. I am ordering the Deluxe Master Rebuild Kit From PAW. With the TRW Forged Pistons. It has a Edelbrock intake RPM, Holley 750 Vaccum Second CArb. Other than that its pretty much stock. I need to know what size cam is good for a marine application..and what will work best for more bottom and top end.

[396_WAYS_TO_SPIT]

What ,compression,heads,intake,impeller??????
If your 9.5-1 then dont go above 230@.50 because you will never spinn the r's to make the power. that is rule of thumb.
My ols is 230@.050,110 lobe,.490 lift and it is a neck snapper. The compression is 9.5-1 with a tunnel ram,2- holley 600's and stock heads. i spin 4700r's all day long.
Hope this helps.
396

[Dave C]

with a few more details and someone can help. Do you run an I/O?
Marine cams are mostly the same but you need to match the duration to your RPM range. Typically split duration w/ higher lift on exhaust.

[NOTALENT]

they are the stock 454 heads oval port with the big valves. it is an I/O Cast#289 Block..Not sure what the compression was but I am going to run 9:5:1 now. I am getting a new 454 longblock core through my company.. because the prick I bought the boat from had it set up wrong had a huge deep sump pan in it thinking it was a 5qt..but its actually what looks about 8. so it had no pressure to pick up the oil...and blew it!!! I put about 2 hrs on it.

[NOTALENT]

what are the lifts on a marine cam?? ALot of places classify them as a marine cam but with no specs.

[lucky]

they are the stock 454 heads oval port with the big valves. it is an I/O Cast#289 Block..Not sure what the compression was but I am going to run 9:5:1 now. I am getting a new 454 longblock core through my company.. because the prick I bought the boat from had it set up wrong had a huge deep sump pan in it thinking it was a 5qt..but its actually what looks about 8. so it had no pressure to pick up the oil...and blew it!!! I put about 2 hrs on it.
SO WHAT DID YOUR GAUGE READ ???

[lucky]

Comp Cams Has A Few - To View
I Just Switched To An Isky
114 Lobes 590/575-lift 247 Dur Went To A Milder Engine - So The Fishing Boats Had Somthing To Admire ... V Drive Cruiser -

[Infomaniac]

A Crane 731 hydraulic roller would be a good cam.

[NOTALENT]

I didnt drive it much..just parked at copper..when I looked at driving speed it was at 30-35psi.

[Shallow Minded]

I'm running part # CRN-139731, a hydraulic roller from Crane, in my 454 and really like it. Idles well, minimum maintenance, good midrange. Recommended CR of 9.5:1 to 11:1.

[NOTALENT]

I'm running part # CRN-139731, a hydraulic roller from Crane, in my 454 and really like it. Idles well, minimum maintenance, good midrange. Recommended CR of 9.5:1 to 11:1.
wow thats a big cam.. .587/.610 thats alot of lift... Is it a stock 454??? what do you have in there??

[Shallow Minded]

Sorry, should have clarified.... not stock. B&M 174 blower, SpeedPro #2453 blower pistons, GM cast #14097088 heads, MSD ignition. Sits in a 26 foot Wellcraft Nova, similar to an early Scarab.

[Dave C]

listen to this guy.... even if he is from OK. ;)
A Crane 731 hydraulic roller would be a good cam.