I would think it would cause issues in the boat because if it was dyno'd and tuned at part throttle the tune in the boat (WOT) would be off.

didn't he say he was getting really low AFR numbers or something?? If the throttle was open all the way in the boat he's drawing more CFM and the carb is drawing more fuel (rich).

Just joking that when the carb was looking like a restriction because of the high vacuum at wot the solution would be a bigger cam as they have less vacuum. It was loosely even sensible and just a lame joke.

How far is the propshaft below the bottom of the boat?

They had different X's based on engine packages and props that the boat was build with.

Just a thought.

Think that got resolved in regards to engines in the boat anyway. Port side was off and running lower AFR's and rpm at wot. He had since installed wideband on both engines and got jetting squared away and same rpm's at wot. Why Tim didn't look down to confirm throttle plates were 100% open while at 6k on dyno is beyond me. Lol. Joke joke. Think we covered that also. SB woulda done it.

Here you go, just pout a couple gallons of this in the tank next fillup....

https://www.summitracing.com/parts/klz-kl-640/overview/

I have a 30 gallon drum of Nitro Methane and 55 gallon drum of Methanol to mix it if your interested.

Has this been solved yet?

It appears we may be finally halfway there. :helmet:

to what,,completely new engines or 112 pages.:D

Close. 114 pages for most of us. 2 long one's for ICDEDPPL :D

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ff you get the engine pulled yet?

Full farce hates me and has said to have now blocked me, but I think my pizzing him off in another thread led to this one.
I hope he finds what he is after, be it reliability, speed or both.

I think 6" its the same as my buddys that came with 420's, we checked that 5 years ago...

had wideband before and after dyno, WOT was checked on dyno in my case.. things change from dyno to boat, no matter what..

yes, tonight...trans dropped off...

I plan to compression test and pull valve covers tomorrow and look at things...

I'm over it, just sick of some of the BS, this thread was to get SOLID INFO... that's all still didn't get it really, guess a valve cover check will tell me tomorrow...

lots of things to ck over without out question but given both engines nearly identacle I still say intake manifolds assuming cams degreed correctly but it sounds like you confirmed that. Not enough spring pressures and or lifter failure woulda showed up on dyno. What springs are you using? Johnson lifters correct?

Not sure the spring, would have to see on paperwork, I think PAC, cams degreed yes..

Johnson lifters also.

As getrdun said, needs intakes and carbs to make more power but unfortunately it sounds like they will not fit under the engine hatches. Also nothing wrong with Bob M cams.

What carb and intake are on the engines?

Are you thinking that an intake designed for a 454 isn't going to work on a 540 with good cylinder heads?

Actually I think Tim could keep his carbs. They should have a dual bolt pattern. I think the 4150 intake is killing the signal to the boosters of the carbs. Usually when the large 4150 style carbs are used for "class racing" with the 4150 intake flange they end up opening up the entry of the intake.

We used a dominator intake with a 4150 carb.
We cut an inch off the brodix HVH 2002 manifold and drilled and tapped it for a 4150.
It had a "cast in place" spacer, so to speak, so we had plenty of material to work with.

I also have hatch clearance issues.

http://i205.photobucket.com/albums/b...psmixtt27l.jpg

What would Zul do for induction? I'm seeing scoops under the Christmas tree this year. :santa:

That's exactly how I would go about it if I had clearance issues to deal with.

How much power you think he will gain from just an intake swap?

Pro comp intakes and Quickfuel 1050's (4150) body

My guess is 20-30. I think you could also get the same results with a lot of grinding on the opening of the intake. To the degree of what was done to Rob's intake in the picture. But I think the motor would be much happier throughout the rpm range... I really believe a 4150 intake does not belong on a 500"+ motor. Neither does a Vic. jr. or 454r/o.

A high rise dual plane intake???

What was it dyno'd with?

Single plane. Was dynoed with it.

Dual plane in the boat?

What carb on the dyno?

Always single plane. 1050 cfm quick fuel 4150 carb

What procomp intake is it? I thought they were a high rise dual plane intake from memory.

Pretty sure its this one

https://www.enginekits.com/intake-ma...-kit-8835.html

How it was on Dyno, and I will add it was very cool of joe to drive over 2 hours to hang out and help all weekend don't find that too often anymore, but he just googles and rips people.. Lol. I wish all these guys making big numbers dynoed in marine trim for real numbers...

[ATTACH=CONFIG]559817[/ATTACH]

I could barely walk that weekend with my dam disc issue with my back, i mostly sat around playing quarterback .

It would have been cool to have more time and try a bunch of things. I certainly dont think there was a magic trick to finding 70hp, and an additional 500rpm of powerband by installing some spacers (thst you cant fit), or a bigger carb (that you cant fit).

This combo was supppsed to make 700hp at 6000rpm with what you had. It simply wasnt happening. At least dynoed with wet marine exhaust and accessories.

I know some dynos you could bring it to though, where it can make 700hp with no other changes if you want a better looking piece of paper.

1 does no good, and 800 is a heck of a claim N/A without spinning it to the moon, a Dyno sheet would be sweet to Doo for them claims.. 750 ish would be my claim especially without a sheet.