540 stroker,,DUD engine, dont do it.
#72
I hate the winter!!
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If you have a 502 with a 4.000 stroke and a 6.135 connecting rod that figures out to a 1.53 rod ratio with a 19.03 angle on the cylinder wall. On a 540 with a 4.250 stroke and a 6.385 connecting rod that has a 1.50 rod ratio and a 19.44 degree angle on the cylinder wall. How are you getting more friction ??. I ran a 67 camaro 7.20's and it was street legal and my Harley runs low 11's sreet legal and my cadilac gets 25 MPG. ![Big Grin](/forums/images/smilies/biggrin.gif)
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As with MOST of us, I always respect your posts and input. Can I ask how you compute the angle on teh cylinder walls?
Thanks
#73
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Not going to touch this topic, but pit-bull did have a bad-azz 2.5 on that velocity! I think he's still a little off in the noodle from that time he got blow out of that thing at around 99mph!! and ended up with his pants-down! Literialy! LOL-LOL! All in fun, just meesin' with you buddy! Hey I personally like a 4.625 bore DRCE with a 3.500 stroke and a 7-1/4 long rod! Eaaaaaaasy on the cylindrous! But I gotta turn it 11k to get on plane! Keep breakin the cable on that Jones mech-tach! Anthonypitbull-scream&fly
#75
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Come to the parties at the Miami show next month and we'll pay for your cab ride back to your hotel after we help kill the "Captain". I need to get the assembly lube out from under my fingernails and wet my parched throat !!
Jeez, you gotta love the banter on this site !!
Regards,
Ray @ Raylar
Jeez, you gotta love the banter on this site !!
Regards,
Ray @ Raylar
#76
Masher touches my
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Pit their are other sites for bashing and name calling. The mystique about OSO is that for performance boating you can learn or ask about anything pertaining to a boat and usually get a response. There are several reputable builders that frequent this site, and I for one appreciate their knowledge. Their are also several knowledgeable hobbiest and racers that frequent this site. If you have an opinion, or facts and/or stories you would like to share about your experiences then feel free to share them. Try to let your opinion be heard without being argumentative or running off any of the other valuable members here.
JC is perv. If you want to run smack about him that's understandable, but he does build nice motors in Zul's bathroom during his lunch break.
JC is perv. If you want to run smack about him that's understandable, but he does build nice motors in Zul's bathroom during his lunch break.
#77
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If you have a 502 with a 4.000 stroke and a 6.135 connecting rod that figures out to a 1.53 rod ratio with a 19.03 angle on the cylinder wall. On a 540 with a 4.250 stroke and a 6.385 connecting rod that has a 1.50 rod ratio and a 19.44 degree angle on the cylinder wall. How are you getting more friction ??. I ran a 67 camaro 7.20's and it was street legal and my Harley runs low 11's sreet legal and my cadilac gets 25 MPG. ![Big Grin](/forums/images/smilies/biggrin.gif)
![Big Grin](/forums/images/smilies/biggrin.gif)
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ROCK ON !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
#78
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Last edited by 1CE; 02-05-2008 at 11:36 PM.
#79
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Back to the short stroke/larger bore 502 vs 540 argument,I was skeptical about running a 4.250 stroke/6.385 rod combo,the thought of having the oil ring over the wrist pin with a rail support,pistons with a fairly short skirt,extra side loading,cyl wall flex,etc,etc worried me going from a 4.00 stroke. After consulting with Tyler Crocket,Rick Lapouttre,Bob Teague and a few others (I don't know anybody in new york) I got the same answer-with MODERN blocks (like my dart block),cyl load/flex is a non issue,especially at the rpm's a marine engine's valve train is going to be limited to,modern piston technology has been using the rail supports for the oil rings very succesfully for years (what used to be custom is off the shelf stuff today). The added benefits of the extra cylinder fill from the increased stroke with resulting hp gains and increased tq were worth the decrease in piston life. Is there a measureable difference in piston life between a short deck 540 vs a 502,I would have to say there is but you could also argue a 502 would have MORE friction from the increased surface area of the longer piston skirt. Back to the marine aspect of it,if you were trying to only achieve the same hp goal with both displacements the 540 is going to make equal tq and hp approx 450 rpm's earlier (assuming a 6000 rpm hp peak on the 502 ), would you rather cruise at 5000 rpm's for extended periods of time or 4550? Smitty