MoJetBoPar:
Your advice sounds good--I'll check into it. Thanks!
MoJetBoPar
I'm running a single plane intake on my 460. Edelbrock Torker I. It's not my preference but it was on the boat when I bought it and seems to work o.k. at least for now. Even with a less than perfect intake I still get an awesome holeshot, especially with the diverter pointed to hell. BAM I'm on plane!
Wait, I'm missing a bit here. Is the motor not running well? Or, is it running fine and the pump just isn't doing its job?
-jim lee
Originally posted by Squirtcha?:
MoJetBoPar
I'm running a single plane intake on my 460. Edelbrock Torker I. It's not my preference but it was on the boat when I bought it and seems to work o.k. at least for now. Even with a less than perfect intake I still get an awesome holeshot, especially with the diverter pointed to hell. BAM I'm on plane!
Sorry Squirtcha?!
That single-plane comment was a generalization and towards smallblocks more in particularly. Big blocks, being torque monsters, aren't usually as vulnerable to sensitive volume flow but I had no idea of how much his hull weighs.
No problemo MoJetBoPar. In fact I'm going to be ordering my Weiand Stealth here in the next couple days. Like I said the Torker isn't my choice, it was on there. Especially the old Torker I. I hear the II is bettter but I'll never know.
Originally posted by jim lee:
Wait, I'm missing a bit here. Is the motor not running well? Or, is it running fine and the pump just isn't doing its job?
-jim lee
Jim Lee- the engine "seems" fine and the pump "seems" fine; in other words there is no obvious problem with either not running properly. The engine/pump combo just do not seem to perform like they should, as if the boat is underpowered and unable to pop up skiers easily. Other jet boaters with my similar set-up have a much better/easier time pulling skiers up. What do you think? Thanks for your input!
If the engine is spinning Max RPM (Runing fine) and the boat ain't pullin'. The first thing I'd do would be to look at the leading edge of your impeller. Get a flashlight, crawl under and give it a good look over. The leading edges should be sharp with no nicks and stuff. From what I've picked up from those that actually know what heir talking about. (I'm just a parrot) The leading edge is what gives you your hole shot. If its dull and niked up, your not going to get a very interesing hole shot.
Now, if the engine isn't hitting max RPM out of the hole, you have other troubles.
A) The engine isn't running right.
B) The impeller is too large of a cut to let the engine REV where it likes it.
P.S. You must remove the trailer from the bottom of the boat before resuming definitive testing. :-)
I hope this helps,
Good luck!
-jim lee
[This message has been edited by jim lee (edited February 02, 2001).]
Awright you guys! Back home to RealJetBoats where ya belong!!!!!
Originally posted by DougB:
Awright you guys! Back home to RealJetBoats where ya belong!!!!!
LOL http://free.***boat.net/ubb/wink.gif
Back in 1976, my Spectra 20 [3000 pound]came with the 460 Ford [Harman Marinized], they put the 429 SCJ cast iron dual plane manifolds on all their engines.These manifolds were depleted by the 460 OMC KING COBRA applications.All of the BBF came with either Hoolley 780 or 830 cfm carbs.Big Fords like big carbs.A marine cam with 502 lift and around 220 duration at 0.50 lift will give you the bottom and you need to pull multiple skiers.I had no problem pulling 3 skiers on two skis with this setup and two slalom skier on single skis.You can go to the Ford Motorsport 443 cam, about 566 lift and 230 duration ,that will give you even more power.My friends 19 Spectra has this combination ,we clocked the speed at 72MPH at sealevel w/GPS.With the placediverter turned down we just snap 3 skier up no time at all.I suspect carburation setup problem here.Check your power valve, make sure it's open up fast enough.your primary jets should be min 72, secondaries should be 85 with a 780 Holley.Primaries should be 76,secondaries should be 94 with a 830 Holley.Dont bother with double pumpers.Let us know how you progress.
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