SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: Santee_Native on November 06, 2012, 08:41:46 PM
-
Looking to get rid of peanut port heads during the off season. What is a good bolt on head and cam combo out there? This is going to be going on a 21ft open bow river runner. Not looking for anything crazy just a nice top end kit that will wake my motor up.
Thanks for the help
Mike
-
WTF :screwy:
-
My bad had a :screwy: moment
-
what engine do you have
-
Contact James Bostick , Bostick racing engines El Cajon.
619-792-3885 , Tell him Marc sent you!!! Really cool down to earth guy.
At the very least just give him a call and pick his brain.
-
Sorry about that I have a 454 BBC cast number 10237297. With a 4150 Holley and a tunnel ran intake.
-
Pictures??????
-
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fi240.photobucket.com%2Falbums%2Fff266%2Fdesertmiked%2F68345936.jpg&hash=ff2e34a81c3af6a02eebcf8abaf63830c5f6fcfe)
-
Good looking boat...I cant wait till they open San V again...not a fan of elcap.
-
Me neither. This is what happend right after install of new pump :banghead:(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fi240.photobucket.com%2Falbums%2Fff266%2Fdesertmiked%2F6a33232d.jpg&hash=8437ab1a9d51b3c7a445b05c85cf14760871e326)
-
Looking to get rid of peanut port heads during the off season. What is a good bolt on head and cam combo out there? This is going to be going on a 21ft open bow river runner. Not looking for anything crazy just a nice top end kit that will wake my motor up.
Thanks for the help
Mike
GM's 781 or 049 are a decent upgrade that wont break the bank, I gained ~300 rpm with JUST the head swap (comp XM292 cam), but for the price of getting a set of heads refreshed at the machine shop, I'd probably go with aluminum heads, or something like a set of world products or similar. cam would depend on final comp. ratio and flow of new heads, and what exhaust you are running, or upgrading to. For an easy combo, there is eddy's performer rpm heads and cam, but I think there is some hp left on the table, especially for the cost.
Thats all I got
Daniel
-
Think I will go the aluminum route what's a proven head and cam combo? And what lifters/rockers should I get?
-
What's a good budget aluminum head? Merlin's are a lil too rich for me.
-
Budget alum head???, check for some 'gently' used name-brand heads, in decent shape, dont get chineese crap. With a stock rotating assembly, i wouldnt turn it faster than 5k or so (cast pistons, crank, etc.)
781 or 049 heads, with good springs and valves
good roller rockers, or steel roller tipped rockers
280ah or similar cam .547"/.547", 232*/237* (I'll never use a flat-tappet cam again, I went roller and never looked back)
292ah may be too much for logs and snails
or...
Aluminum heads w/big valves
Roller cam, rockers
forged rotating ass'y (go to 489 or 496 cu.in. while your at it)
9.5-10:1 compression
TT headers
Its ALL cubic dollar$
Daniel
-
Looking to get rid of peanut port heads during the off season. What is a good bolt on head and cam combo out there? This is going to be going on a 21ft open bow river runner. Not looking for anything crazy just a nice top end kit that will wake my motor up.
Thanks for the help
Mike
Since the casting number you gave is a Gen 6 block, I presume you already have a roller cam. I can get that one reground for you for considerably less than you can buy a new roller camshaft for. You stated you have a tunnel ram and a single 4150 Holley,, but don't say what size the carb is. Can't see it sticking through the engine cover on the boat. A tunnel ram may not be your best choice for your heavier boat, and probably lower RPM?
I would be happy to talk to you on the phone if you want to PM for my number. The oval port heads that have been mentioned might be the best way to go. If you are really on a budget I have a set of the peanut port heads that were opened up to the larger oval size.
First step is to decide what you think you want to spend, and how much you would like to gain and see if those two numbers will work together.
-
First step is to decide what you think you want to spend, and how much you would like to gain and see if those two numbers will work together.
Bingo!
-
Sorry about not listing carb info it's a 750 vacuum secondary Holley. I'm pretty sure it has a hydraulic cam and not a roller. I just want to get what I can outta my motor it feels weak now that I got my pump redone. I wanna try new heads and a better cam. Before I go all out and pull the motor for a total over haul. And if it does end up needing a over haul ill have good parts ready.
-
Did you buy this boat from a deaf guy?
-
Sure did
-
Did you buy this boat from a deaf guy?
"river rat 34" from ramona, a real nice guy, haven't seen him on the boards for a long time
-
yeah he is a good guy, i boated with him a few times.. that boat always ran a little slow but was turn key
-
Yup it's time too fix the slow part lol
-
Yup it's time too fix the slow part lol
:thumbup: ;D