!!!Project 80 Ski!!! |
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boat dr
Grand Poobah Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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racintj, did not chine in on this issue as i was not going to be the one to piss on his parade.
The cam and induction system will work great for a 1/4 mile car running 4.56 gears, for a short time .But soon MR. Squeeky will come to call,bottom end failure. I see lots of issues,rotation I am not sure of,cam too muh bump,carb too large, incorrect rotating assy.for said RPM's,and largly understanding how a boat engine works VS car motor immense. But the proof will be in the pudding. If he can prop it afterward that alone will be a story for this site. If my prop math is correct; If the motor will pull a 13x14 /6000rpm's =68mph that will be a fast C/C....good luck..boat dr |
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MarineSRT8
Senior Member Joined: August-06-2007 Location: IN/FL/SC Status: Offline Points: 227 |
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have you been building motors for long?...Because if you know what you are doing....6000 rpm is not a death certificate.....like I posted earlier I built a 383 that would spin to 8 grand if need be....and its still going strong with many trips to the strip
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"Some people go an entire lifetime wondering if they made a difference. Marines don't have that problem"
-Pres. Ronald Reagan- |
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MaddMarxx
Platinum Member Joined: June-29-2006 Location: United States Status: Offline Points: 1741 |
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thats a stock 351, 6000-rpms not for long, Boom!!
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MarineSRT8
Senior Member Joined: August-06-2007 Location: IN/FL/SC Status: Offline Points: 227 |
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Intake duration of 291 and an exhaust duration of 311, intake lift of .541 and exhaust at .526 and a lobe seperation of 107 deg. which means I am safely clear of the 115 deg no no zone. I do however understand that my (VE) is at about 134% at 5500 rpms with the 750 carb...BUT I will be spinning faster than that. More to the tune of 6000. The (VE) of 134 is with the carb spraying static. So with the carb bridled a bit I will have no problem getting pretty close to 100% (VE). No I dont mind adjusting valves and with the limited time the boat will be in the water the adjustments will be minimal. Besides it will grab RPMs alot faster than a Hyd-Lifter motor.
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"Some people go an entire lifetime wondering if they made a difference. Marines don't have that problem"
-Pres. Ronald Reagan- |
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racintj
Senior Member Joined: May-09-2007 Location: United States Status: Offline Points: 163 |
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Sorry about your Mom, and congrats on doing something to remember her.
I'm not sure how you are positive that it is standard rotation, double check and triple check that this is the case. Are you just going to put rings in it if the cylinders check out? What is the chamber size on the RPM heads? 750 is too much carb for the 351 in a ski boat. 351 ci. at 5500 rpms, with 100% VE (volumetric efficiency) is only 560 cfm. I'm suprised doc didn't jump on that. What kind of lift, duration and overlap are you running? Solid lifters, I guess you like adjusting valves. |
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Every day above ground is a Good day.
Lakeland, FL |
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MarineSRT8
Senior Member Joined: August-06-2007 Location: IN/FL/SC Status: Offline Points: 227 |
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No the pay still sucks. My mother passed away a little over a year ago and left me some money, so I am going to name my SN after her. I purhcased the boat on exactly the day she passed away. See she taught me how to ski when I was little and she was an amazing skier herself. I figured its the only way for me to spend time with her now that she's gone.
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"Some people go an entire lifetime wondering if they made a difference. Marines don't have that problem"
-Pres. Ronald Reagan- |
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jbear
Grand Poobah Joined: January-21-2005 Location: Lake Wales FL. Status: Offline Points: 8193 |
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Figured you had to be single. You are taking on quite a job. As you can see...guys here love these threads...me too...I just don't understand what all you guys are talkin' about.
Being a Marine must pay well these days...as it should. john |
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"Loud pipes save lives"
AdamT sez "I'm Canadian and a beaver lover myself"... |
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MarineSRT8
Senior Member Joined: August-06-2007 Location: IN/FL/SC Status: Offline Points: 227 |
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The block is at the machine shope right now, and taking into account the shape of the cylinders and the pistons I will not have to do any boring at all. But if that situation presents itself I will keep you in mind. Guess I started quite a thread with the rotation comment. I know my boat is a standard rotation motor for sure. I hope I led no one in the wrong direction by the statement I made.
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"Some people go an entire lifetime wondering if they made a difference. Marines don't have that problem"
-Pres. Ronald Reagan- |
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MaddMarxx
Platinum Member Joined: June-29-2006 Location: United States Status: Offline Points: 1741 |
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SRT8...Are you going to rebuild that motor or are you just going bolt all that stuff on that motor, because I have a new set 30 over, keith black pistons for sale if you need them!
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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'79 is missing a field day here?!!? LOL
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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boat dr, again please pardon my ignorance...I understand the rear seal and cam being directional. I don't understand the piston rotation part.
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boat dr
Grand Poobah Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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Get the camera out again, give us a good shot of the dist. drive gear or a shot of the prop.Either one will tell the direction ,LH or conventional/ RH reverse rotation.
Some the parts you have bought will work.The rear seal is specific to rotation,as is piston rotation.The cam is a LH, or convetional,and will not work with a RH or reverse rotation dist. The oil pump is the same for either rotation. Hope you did some research on direction before you jumped into this rebuild...boat dr |
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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Not my intent!
I understand RH and LH...you guys cleared the terminology up for me a while back However it's put, both my boats were RH...opposite a car...clockwise facing the stern Backfoot asked if he was converting to standard rotation. I took that to mean going from RH to LH. I asked because I thought all of the older CC's were RH. |
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bkhallpass
Grand Poobah Joined: March-29-2005 Location: United States Status: Offline Points: 4723 |
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Now your question kind of confuses me. A Standard Rotation Boat - Spins left (counterclockwise) when looking at the the prop from the back of the boat. - Spins right (clockwise) when looking at the flywheel from the front of the boat. A Reverse Rotation Boat - Spins right (clockwise when looking at the prop from the back of the boat. - Spins left (counterclockwise) when looking at the flywheel from the front of the boat. BKH |
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Livin' the Dream
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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FYI only...my 79 was RH and so is my 88; Did they put LH motors in 'em back then?
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bkhallpass
Grand Poobah Joined: March-29-2005 Location: United States Status: Offline Points: 4723 |
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?? 80 had reverse rotation motors. BKH |
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Livin' the Dream
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MarineSRT8
Senior Member Joined: August-06-2007 Location: IN/FL/SC Status: Offline Points: 227 |
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I read all the threads on heads before I made my purchase and it seems to me that I will be ok with raw water on aluminum heads. Especially if I flush the system periodically. And considering the limited # of times my boat will be on the water I think Ill be fine!!! |
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"Some people go an entire lifetime wondering if they made a difference. Marines don't have that problem"
-Pres. Ronald Reagan- |
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MarineSRT8
Senior Member Joined: August-06-2007 Location: IN/FL/SC Status: Offline Points: 227 |
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I think with the right setup the gear drive will do well. I helped a friend at home build a 383 stroker with a gear drive that achieved 450hp and will touch 8 grand if you want it to |
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"Some people go an entire lifetime wondering if they made a difference. Marines don't have that problem"
-Pres. Ronald Reagan- |
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MarineSRT8
Senior Member Joined: August-06-2007 Location: IN/FL/SC Status: Offline Points: 227 |
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Its and 80 so the motor is already a standard rotation. CC didnt change that until 88 |
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"Some people go an entire lifetime wondering if they made a difference. Marines don't have that problem"
-Pres. Ronald Reagan- |
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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If that's gingerbread, what's meat and potatos?!!? LOL
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eric lavine
Grand Poobah Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
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I call that stuff gingerbread, watch the gear drive they dont like high RPM's
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"the things you own will start to own you"
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quinner
Grand Poobah Joined: October-12-2005 Location: Unknown Status: Offline Points: 5828 |
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Do Aluminum heads require a closed cooling system like the ZR6?
Good luck with your project, many new cool parts! |
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backfoot100
Platinum Member Joined: January-03-2007 Location: United States Status: Offline Points: 1897 |
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Nate, looks like quite a project. Definitely keep us posted on the results. By looking at the cam, I would assume that you're converting this to a standard rotation motor?
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When people run down to the lake to see what's making that noise, you've succeeded.
Eddie |
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MarineSRT8
Senior Member Joined: August-06-2007 Location: IN/FL/SC Status: Offline Points: 227 |
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oh and by the way the ski lime is def one of the baddest SNs I have EVER seen!!!
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"Some people go an entire lifetime wondering if they made a difference. Marines don't have that problem"
-Pres. Ronald Reagan- |
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MarineSRT8
Senior Member Joined: August-06-2007 Location: IN/FL/SC Status: Offline Points: 227 |
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with shipping about 1200... they're only 1.90s. The 351W has notched pistons stock BUT I wasnt sure that it was a deep enough notch to facilitate 2.02s....So I played it safe. I have roller solid lifters, and roller rockers on the way. MSD ignition and Crane Fire Ball Coil.....Ive been trying to contact the doc about the Hi-Teks, someone posted about him getting a good price. Thats the next investment.
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"Some people go an entire lifetime wondering if they made a difference. Marines don't have that problem"
-Pres. Ronald Reagan- |
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MaddMarxx
Platinum Member Joined: June-29-2006 Location: United States Status: Offline Points: 1741 |
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I like those heads, what did they set you back??
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MarineSRT8
Senior Member Joined: August-06-2007 Location: IN/FL/SC Status: Offline Points: 227 |
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Nope....HAPPILY Single!!!!!
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"Some people go an entire lifetime wondering if they made a difference. Marines don't have that problem"
-Pres. Ronald Reagan- |
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jbear
Grand Poobah Joined: January-21-2005 Location: Lake Wales FL. Status: Offline Points: 8193 |
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Dude; I liked it to that all the stuff was laid out on the couch...Mr. Marine must not be married.
john |
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"Loud pipes save lives"
AdamT sez "I'm Canadian and a beaver lover myself"... |
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MarineSRT8
Senior Member Joined: August-06-2007 Location: IN/FL/SC Status: Offline Points: 227 |
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yes it is the Holly 750 cfm Marine Carb....Thanks for looking out though
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"Some people go an entire lifetime wondering if they made a difference. Marines don't have that problem"
-Pres. Ronald Reagan- |
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MaddMarxx
Platinum Member Joined: June-29-2006 Location: United States Status: Offline Points: 1741 |
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nice stuff... I have to ask you one thing, is that a marine carb, if not take back before you use it, and get the right one!
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