Intake Runner volumes
04-03-2016, 07:45 AM
#61
Registered
Always a fair point, however it seems someone always says this no matter what performance part thread.
Tuning - fuel / ignition
Exhaust - we here this all the time
Cam / Head / Intake etc
Oil Level
Well, who would want a 560-hp engine if it could make 600 ?
That's for the owner to decide.
And yes, some boats will respond to smaller hp additions than others....so that is a factor.
Tuning - fuel / ignition
Exhaust - we here this all the time
Cam / Head / Intake etc
Oil Level
Well, who would want a 560-hp engine if it could make 600 ?
That's for the owner to decide.
And yes, some boats will respond to smaller hp additions than others....so that is a factor.
That was my last build he's referring to... In was in my little Checkmate...
Unfortunately, I didn't get to test the cam timing change back to back on the water...
My goal was RPM..
I had a ton of $$ tied up in my prop and my current engine (Iron head 509) could only spin it to 5200 RPM
When I freshened my engine, I changed to AFR heads and a new cam.
On the dyno it was starting to lay over at 5300 RPM.
It may have been caused by one of the accessories, not sure as we never tested without them.
So we tried retarded the cam timing and it worked out...
Gave up some torque I couldn't use in the first place (stock Bravo outdrive) and got my HP peak where it needed to be..
Doug
Last edited by Boatally Insane; 04-03-2016 at 07:50 AM.
04-03-2016, 08:59 AM
#62
Charter Member#568
Charter Member
As far as intakes go we saw a 10-15 hp change on the dyno with just the intake. Same carb, no other changes. That was just going from the Vic Jr to the 454R, so imagine how much difference there could be between different styles.
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Straight bottoms and flat decks
Straight bottoms and flat decks
Last edited by bck; 04-03-2016 at 09:09 AM.
04-03-2016, 09:18 AM
#63
Registered
04-03-2016, 09:30 AM
#65
Registered
I've seen the same on bigger motors. I have heard the Merlin Intakes work well, but have never tried them.
04-03-2016, 09:36 AM
#66
Charter Member#568
Charter Member
Not sure if the marine version of the Merlin X is still available. I had to use what was available anyways, couldnt afford to buy just to test.
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Straight bottoms and flat decks
Straight bottoms and flat decks
04-03-2016, 10:30 AM
#68
Registered
Someone on the boards has a Sniper Jr. I'll have to do a search.
04-03-2016, 10:49 AM
#69
Charter Member#568
Charter Member
The description says it has a built in spacer. 7.4 carb mounting height, which would make it most similar to the super victor I believe.
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Straight bottoms and flat decks
Straight bottoms and flat decks
Last edited by bck; 04-03-2016 at 10:59 AM.
