HOSS
aka jroos
- Joined
- Oct 4, 2007
- Messages
- 285
- Reaction score
- 95
This was totally my fault as I left my heads at a machine shop for the last couple of years and now they are gone. Sooo, does anyone have a decent set?
The suggestion to call Paul (lakesonly from other web-based realms) can get you good answers for both of your questions. As another alternative, why not have the Blue Thunders hard anodized to protect em from the saltwater?
Good luck with it,
Chris
Hoss , I didn't read back too far but I will have a set of CJ heads from a BBF job I'm doing for a guy in Louisiana Pm me if your interested Tom
Thanks flatbroke, the motor netted 1100 hp. The water down here will flat out ruin the heads and intake. Motor has been sitting in the shop now for too long now. I actually just put the long block back together. So with that being said I need another set of DOVE heads. I should just buy another cheap tunnel ram and may just do that. But I need steel heads.
Or run your existing motor "as is" and buy a heat exchanger, coolant resevoir and waterpump If you're that worried about the water you run in, why not go with a closed cooling setup? Somethin to think about.
Chris
I'm gonna chime in here and draw some flak, but if it saves Hoss some headache it's worth it. I'm going to say ixnay on the Clay Smith camskay. Nothing against Honker's cams, but from my experience, and my brother's experience (both had complete long blocks spec'd/machined by him) his flat tappet cams bleed off too much compression to be usefull in a lower RPM (under 6k) scenario which covers most jetboats. You'd be much better served with a roller setup that can generate the lift you want without the overlap required by the lobe profiles used on flat tappet cams.
Again, nothing against the quality of CS cams/valvetrain components, but I feel his solid lifter/flat tappet setups aren't the best option if someone is willing to spend a little more for a roller cam setup.
With a 557 I know the VE forumla probably says you can get by with a 750 cfm carb, but you'll need more. If the hull you have can't handle the hp/speed from a pretty tame 557, I simply wouldn't waste your time/money on the project. Old jetboat hulls are the cheapest part of an old jetboat project, so if you're dead set on building a 557 (even a simple 10.75:1 or 11:1 pump gas setup with a single carb will pull over 700hp), make sure your hull can handle it.
FYI, a set of blue thunders, on an 11:1 557 with a victor jr/dominator setup will make north of 800 hp on 92 octane under 6k rpm if you can keep it cool. Just somethin to think about.
Chris
Hoss,im hoping you are going to listen to Grag at GS Marine. if he told you what its going to do with that hp,it will.the man has tons and tons of experience in the jet world,its kind of an obsession of his.I forgot, Greg (GS Marine) and Ronnie (Sporl Racing) both say with this hul and that hp,,,I will flat out die. The hull will chine walk violently. Greg told me to take a whole inch out of the strakes and it`ll still probably walk badly.