Isky cam specs

Neat. Attach the video.

Someone do the math. 9.8 MPH in 2nd gear with 38 inch tires = how many RPM??

So let me restate my previous post: Single digit MPH for $15,000.00. Where do we sign up??

mgburchard wrote: Larry call pan key 4two three7794425 he says as long as nitwits are on here I can't say anything else

You have an incredible knack for missing the point.

30 years ago I had a WD 45 that bought to pull with. I bought the tractor for $325.00. The engine was assembled by Doc Allis using used 4.125 bore M and W pistons and sleeves from a WD - WC machined to work with the 4.500 inch crank. 240 raging cubic inches that on it's best day it had 73 HP on the M and W dyno. That is what I started pulling with and it was a lot of fun as far as being able to win over and over again without any breakage. The only maintenance ever done was changing the oil, plugs, and points. Now by todays standards it wouldn't be much, but I don't think I had $1000.00 in the whole thing including paint.

Your claim of second gear(if that is real and not make believe)is lacking data as usual and doesn't say much. Mine would do that any day of the week in any town at 3500 lbs. with 14.9 X 38 tires. Yes it would complete the run and spin it out - not die.

If anyone is dumb enough to give you $15,000.00 cash to work on a W 4 cylinder engine what you product better be good enough to run road gear no matter the weight. I doubt we ever see any video of anything you supposedly build and I doubt you get many takers on your amazing offer....


Edited by O.P.S. Heads - 08 May 2015 at 5:59pm

Yep it was spinning a little over 1100 rpms then .O'Brien will you post the 175 valve opening and intake closing degrees from the power is knowledge book ? Pankeys is locked up in shop

Intake opens at 3 degrees BTDC.....Intake closes at 48 degrees ABDC..........Exhaust opens at 38 degrees BBDC......Exhaust closes at 13 degrees ATDC.   Actual valve lift is .460" Intake    .458" Exhaust.

O.P.S. Heads wrote: You have an incredible knack for missing the point.

DrAllis wrote: I keep thinking the Tennessee State Educational system has failed miserably in Reading, Writing and Math ??

lol OK let's try again the engine was turning 4 grand so there was a over 1100 rpms lost due to tire slippage making 9.8 it slowest run to date

mgburchard wrote: DrAllis wrote: Intake opens at 3 degrees BTDC.....Intake closes at 48 degrees ABDC..........Exhaust opens at 38 degrees BBDC......Exhaust closes at 13 degrees ATDC.   Actual valve lift is .460" Intake    .458" Exhaust. Thank you . 232 degrees of duration on intake and exhaust .ICL is 112.5 exhaust cl is 102.50. Oh 16 degrews of duration Specs for 175 can as installed per power is knowledge manual

Thank you for enforcing my point. Now I've measured a bunch of stock cams to see any difference. Its wrote down in a book I keep at the shop. What I found was 112-113 intake centerline. Just going from memory here, but I think the .050" duration numbers were about 176* or so.

Now let's do the old trick of taking a stock cam and advancing it 1 tooth. Well our intake centerline now becomes 99-100* atdc, or the intake closing point moves from 48* abdc to about 35* abdc. What happens? The engine makes noticeably more power.

You want to close the intake valve 115 abdc........I do hope you realize that that thing called the piston is moving up in the bore and has already passed the half way point, it's moving rapidly and slowing down. Hoping to finally compress some of the air you have blown back out the intake tract......just think of the other cylinder paired on that port fighting for a breath while the air has stalled and reversed direction.

Good luck goof troop. Make sure to show us a video and let us know what events you will be at.

mgburchard wrote: Marty advancing the intake caused your exhaust duration to increase over 20 degrees in duration

Saved.....the duration doesn't increase 20 degrees by advancing or retarding the cam you nitwit. When the valve events happen change . Dang boy, you don't know the basics.

Any can grinder will tell you you need a different can if you advance it 12 degrees . if you reground that can held the 112 cl the new can to have the same ivo ivc would have 255 degrees intake duration at the same lifter rise as it was at 230 degrees duration . any degree you advance the centerline to adds to the ivo and ivc evo and evc at that lifter rise valve events are known at. Its Palin and simple increase stroke increases piston speed and length of cylinder given that anyone can see you need more duration from the same head and valve to fill cylinder .

Edited by mgburchard - 09 May 2015 at 9:24am

Always a fun read when pank gets on here..... I'm still wondering who would spend 15 grand to go 10mph on a WD lol.

ICL is the key to getting around all nelsons issues with duration and siameese ports. When one advances the ICL he is increasing is dcr back closer to his original scr but there is a point where you advance the ICL and loose dcr to find that point you would have to use degree bushings like Pankey does go advance 2 ,4,6,8 and read compression tester each time then advance can one tooth for 12 degrees and start using 2,4,6,8 degree bushing to reduce the ICL . There is also a point where duration will increase dcr by giving the valves correct time to stay open to fill the cylinder and cylinder depression come back to atmospheric. There is also a time duration will reduce cranking compression dcr by closing intake valve while cylinder is still below atmospheric pressure under depression in a vacuum .

Edited by mgburchard - 09 May 2015 at 10:38am

wi50 wrote: mgburchard wrote: Larry the one Pankey spec for my 452 inch allis is 356 duration at .006 lift with ivo at 61.2 degrees btdc and ivc 115 degrees abdc You do realize you will have to retard the cam to a 117* atdc intake centerline......for these specs to be true. You won't get the chain tight.

nope can grind is on 105 icl

mgburchard wrote: ICL is the key to getting around all nelsons issues with duration and siameese ports. When one advances the ICL he is increasing is dcr back closer to his original scr but there is a point where you advance the ICL and loose dcr to find that point you would have to use degree bushings like Pankey does go advance 2 ,4,6,8 and read compression tester each time then advance can one tooth for 12 degrees and start using 2,4,6,8 degree bushing to reduce the ICL . There is also a point where duration will increase dcr by giving the valves correct time to stay open to fill the cylinder and cylinder depression come back to atmospheric. There is also a time duration will reduce cranking compression dcr by closing intake valve while cylinder is still below atmospheric pressure under depression in a vacuum .

bump

By the way Marty we have to assume that the allis 230 duration valve events is at .050 since it was probably read in a block verses cam Dr. Its really hard to read .006 rise in a block after all the valve lash was 14-16 so it had to be read at higher than lash