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Originally Posted by 230lx434
(Post 4393545)
In theory lets say, if the cam had 3-4 degrees of advance ground into it from a tuning perspective would this amount of advance be adding to initial timing at idle and also WOT timing at WOT? Example initial timing straight up would be 22* and WOT 33-34*. would the advance need to be taken into consideration when setting these parameters up in FAST Xfi on commanded spark?
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Originally Posted by ezstriper
(Post 4393528)
I would think the extra low end would be a + getting a 10k boat on plane...just me...moving the cam around mainly just moves the power band, as in your friend Joe, said his 6000rpm cam pulled to 6700, bet if he advanced it 4 deg might be close to the 6k he was looking for...maybe was not degreed in correct on the built or cam just missed a bit...getting down to splitting hairs at this point.
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I wish I researched a little more about camming my 540's to move a heavy mistress, too late now to change things but my results are off, the issue is some guys say I have too much cam, others say not enough to keep the Tq to move the boat. I do plan to dyno in Feb. that will also tell me things I guess
I was talking to Cigrocket last year he moved a mistress to nice speeds with his 540's I should have build identical to that build, I thought about moving cams around on dyno but does not seem the effort will produce great results in N/A application. |
tim,the wrong camshaft sure could be the root of your problem.i forgot your cam specs.can you refresh my memory?
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241/[email protected] duration, 681/663 lift, 112 LSA was informed to install dot to dot, we degreed it in also, I would have to look for that spec, I wanna say 108.5? been a while....
Originally Posted by mike tkach
(Post 4393677)
tim,the wrong camshaft sure could be the root of your problem.i forgot your cam specs.can you refresh my memory?
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Originally Posted by mike tkach
(Post 4393677)
tim,the wrong camshaft sure could be the root of your problem.i forgot your cam specs.can you refresh my memory?
.681/.663 112 lsa 109 icl 115 ecl |
haha DITTO!!
Originally Posted by MILD THUNDER
(Post 4393698)
241/246 @ .050
.681/.663 112 lsa 109 icl 115 ecl |
i am no cam expert but i think that should be a good choice for your engines.
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Some say yes, some say no, I have no idea, it's not getting changed right now anyway $$ but Cigrockets builds pushed his boat to easy 75 with more to go, I am struggling to see 73, same exact boat and props... he had similar builds with 741 cams 687 on Dyno..I think he said, 540, AFR315's
Originally Posted by mike tkach
(Post 4393704)
i am no cam expert but i think that should be a good choice for your engines.
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i know for a fact that the afr 315 is a hell of a good head.
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