Opinions on a 393 stroker build |
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81nautique
Grand Poobah Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5778 |
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Posted: February-07-2012 at 7:04pm |
I made an 02 adapter a few years ago for pcm manifolds but ended up using a different set of manifolds on my boat. I'll try to find a photo of it tonight but there is one on the site somewhere. It was an experiment so it's yours if you want it, I'd just like to see someone put it to use.
edit: found the picture, the 02 sensor is not included, just the adapter |
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You can’t change the wind but you can adjust your sails
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JoeinNY
Grand Poobah Joined: October-19-2005 Location: United States Status: Offline Points: 5698 |
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Looks pretty good though. It would scare the heck out of me as if it cracks you are going to cause some trouble, but I guess if you didnt crack it welding it and cooling it down you should be alright. That boat is looking pretty sweet.. I am jealous I still have to put on my intake manifold and paint the block tonight. I have used that same number probe piston a few times and they look different each time I order them. My last set cracked right around the dish pocket, apparently I wasnt the only one that had that problem because it looks like on your set they changed from a relatively sharp transition to a very generous radius in that spot. I like to see the continous improvement from them.. just wish they did it a little sooner! When do you hit the water? It should be very interesting to see how that thing runs out. Load it up and bring it down to florida to the SJRR in late march and I will swap rides with ya. |
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littleshop
Newbie Joined: August-17-2011 Location: Tennessee Status: Offline Points: 21 |
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Yessir, it's for a data tool. TIGed it in with 308 stainless rod and was a bitch to get to!
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SNobsessed
Grand Poobah Joined: October-21-2007 Location: IA Status: Offline Points: 7102 |
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Is the brazed port in the exhaust riser for a O2 sensor?
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“Beer is proof that God loves us and wants us to be happy.”
Ben Franklin |
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littleshop
Newbie Joined: August-17-2011 Location: Tennessee Status: Offline Points: 21 |
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file-fittin some rings..
had to I cut one end off the windage tray and re-weld it onto the opposite side to spin it around for the reverse rotation some were asking about the cam specs.. It was per recommendation from Comp Got it all put back together this weekend and took that pic while running it for 30 mins on Comp break-in oil before swapping out to real oil and reinstalling the inner valave springs. Sorry for all the uploads but I'm excited about this sucker! |
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phatsat67
Grand Poobah Joined: March-13-2006 Location: Indiana Status: Offline Points: 6150 |
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Ill throw in my 2 cents Pete. Maybe it was 86 when chebby switched to the new style crankshaft that wouldn't bolt up to the flywheel we are using in the skylark. Its been a while since I built my ford haha. Thanks Tim.
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Zach,
I know you are the Mopar guy so can you comment/help with this thread? |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21166 |
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The switch on rear main seal styles (for the 351w) happened in '82-83.
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phatsat67
Grand Poobah Joined: March-13-2006 Location: Indiana Status: Offline Points: 6150 |
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I've heard bad things about the eagle crankshafts snapping near the rear maing journal :S. That is what I have seen online about the mopar 408 stroker cranks but I've also heard that SCAT makes a much stronger piece in that regard. I don't know if the same holds true for a ford. Either way stroker motors are where its at. And an 83 motor with a one piece rear main? I thought that the 86 motor was the first for that if not enlighten me.
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eric lavine
Grand Poobah Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
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im thinking mid 60's? what prop did you decide on Jeff?
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"the things you own will start to own you"
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PAPA
Senior Member Joined: October-06-2009 Location: Fremont, In Status: Offline Points: 202 |
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Just wondering what cam you finally decided to go with and what specs. |
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connorssons
Platinum Member Joined: January-17-2009 Location: Michigan Status: Offline Points: 1414 |
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Hay Eric! 750 cfm marine unit! Hay Greg! i freaking hope so! when you guys talk a labor of love you ain,t kidding, might have to put a 3rd hole in the transom if ya know what i maen!
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littleshop
Newbie Joined: August-17-2011 Location: Tennessee Status: Offline Points: 21 |
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I lied, the pistons are Probe not Ross. 10676-030 And that 383 looks pretty sweet! I'm considering putting March stuff on mine too, and maybe convert it to serpentine. Hard to know where to draw the line..
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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Nice Jeff! Will it run if you get fingerprints on it?
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eric lavine
Grand Poobah Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
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ahhhhhhh, finally
what size carb Jeff? my stroked monster loved a 780cfm, tried it on a whim, that fcker made brute power, i thought i would never say this but it made to much power for the car |
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"the things you own will start to own you"
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connorssons
Platinum Member Joined: January-17-2009 Location: Michigan Status: Offline Points: 1414 |
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OOOPS!
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connorssons
Platinum Member Joined: January-17-2009 Location: Michigan Status: Offline Points: 1414 |
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Pic of my 383 stroker chevy for my 75 separator! cool thread, ill be doing a 351w soon.
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littleshop
Newbie Joined: August-17-2011 Location: Tennessee Status: Offline Points: 21 |
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Yup yup. Windage tray indeed per suggestion from one of the fellas on here. It's on there as of now, but due to the rotation I had to flip it around backwards, cut one end off and tig it to the other side. Fits good now, with about 3/16 to the rod bolts at the closest point.
can't remember what the pistons are cause its been a minute since we ordered all that.. Will find out tho. Hopefully I don't blow up all of this stuff! |
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JoeinNY
Grand Poobah Joined: October-19-2005 Location: United States Status: Offline Points: 5698 |
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Possible, but not one I have seen before. They look like smaller diameter extensions like the one you would need for the oil pickup.. it is definitely not a stud girdle. Will be interesting to see
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peter1234
Grand Poobah Joined: February-03-2008 Location: United States Status: Offline Points: 2756 |
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windage tray?
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former skylark owner now a formula but I cant let this place go
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JoeinNY
Grand Poobah Joined: October-19-2005 Location: United States Status: Offline Points: 5698 |
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Looks like fun - i am about the same spot putting mine together at the moment - pistons are in but heads arent on as I ended up needing custom gaskets made up and they just arrived.
What pistons are we looking at there? What is up with the really long main studs? |
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littleshop
Newbie Joined: August-17-2011 Location: Tennessee Status: Offline Points: 21 |
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Well it's about time to start thinking warm. I figured I might post some pics on here as we go along putting the engine together. forged stroker crank from Scat to make a 393 de-edged Ross pistons picked up used AFR 185s for cheap, CNC ported and with Crane roller rockers included spring pressure checked out good for flat tappet cam, so we lapped the valves, surfaced the deck, checked guide clearance, cleaned, and reassembled with the inner springs left out until the cam is broken in. Looks like I did good on these considering the investment. :) Waiting on some rings to come in so we can finish the bottom end. With any luck I'll have this thing in the water by the end of the month! |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21166 |
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Gary, I would have sworn up and down that you put a bigger cam than that in your '73. I know we discussed it at length a few times- you were concerned about going too big. I remember the cam in question was slightly larger than my .490/.490, and I was sure you pulled the trigger on it. Am I misremembering? I assume youre running a 540 now... how many RPM's are you pulling it? Have you had Alan plug your numbers into his desktop dyno to see where your hp peak is? Propping your WOT as close to that peak as possible should give you the best top end, in theory. Youre probably right on the verge of where a 430 might make sense. |
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eric lavine
Grand Poobah Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
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i put a used set of AFR' 210's om my car, smoke a little when i fire it, check the guides
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"the things you own will start to own you"
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jbear
Grand Poobah Joined: January-21-2005 Location: Lake Wales FL. Status: Offline Points: 8193 |
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3...easy.
I know me, Eddie and HW would have no problem and I bet Tim, Brad and Larry could match. Bet it could do 4! john |
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"Loud pipes save lives"
AdamT sez "I'm Canadian and a beaver lover myself"... |
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65 'cuda
Platinum Member Joined: July-12-2005 Location: Cincinnati, OH Status: Offline Points: 1091 |
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Three deeps jbear!
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jbear
Grand Poobah Joined: January-21-2005 Location: Lake Wales FL. Status: Offline Points: 8193 |
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I will testify to this...can't imagine you needing anymore..... john |
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"Loud pipes save lives"
AdamT sez "I'm Canadian and a beaver lover myself"... |
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65 'cuda
Platinum Member Joined: July-12-2005 Location: Cincinnati, OH Status: Offline Points: 1091 |
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here is my cam data from cam research:
Gross valve lift intake .478 Exhaust .486 Duration 272 285 duration at .050 208 220 Valve Timing Open Close Intake BTDC -6 ABDC 34 Exhaust BBDC 48 ATDC -8 Lobe separation 114 Wish I would gone more, boat pulls very well though, wish it had a little more top end. I'd like to try a 430 on the boat, i think it would spin it 4900. Anybody got one to lend me? |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21166 |
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Hopefully Comp is taking all of your other components into consideration when making a recommendation... intake, heads, compression ratio, etc... and of course, what your goals are for the build. I wouldnt necessarily shoot for the .550 range, though thats not out of the question if their analysis shows that it will work well for you.
If CR is limited to .460 of lift that would be a very recent development, as theyve ground bigger RH cams for many people here. Even if that was the case, they could always have ground you something with a smaller base circle that would give you more lift... you would just need longer pushrods. Something isnt quite making sense. |
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littleshop
Newbie Joined: August-17-2011 Location: Tennessee Status: Offline Points: 21 |
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His words were VERY precise when he told me they couldn't do a bigger lift in reverse rotation, but maybe he was still trying to save the cam they had already started by telling me that.
I guess I'll see what Comp has in the .550 range. Thanks for the input. |
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