Isky cam specs

Butch(OH) 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 Please post a video of that one running. It will take a super charger plus you two blow hards blowing in the intake ( a three charger set up LOL) for it to even fire with only 4 degrees of valve closer.

mgburchard wrote: Blue Pank will build a 452 for anyone it just takes 15 grand of cash

You give me an n itemized list and cost of each item I'll scrap the 240 incher I built this winter and take a trip to TN with cash in hand

wi50 wrote: You're 240 will run better than pranks imaginary build. He specked 115 degrees after bottom dead center intake valve closing....... trust me, a poor running weed whip will make more power.

Who has the tractor with this cam in it now. I'd like to discuss this with them and see it run. I am still looking to get 500", but not sure if I can. Also thinking of a fuel injection set up. Seen a Kinsler set up on a little GM 4 banger and got me thinking. That would take care of all the carb issues and most likely be NATPA div 1 legal the way their rules are

Edited by Larry(OH) - 07 May 2015 at 5:38am

Larry(OH) wrote: Who has the tractor with this cam in it now. I'd like to discuss this with them and see it run.

dont bother larry i checked this morning before i went to school, NO FUELINJECTION FOUND just some dorky carbs slapped on something with an allis chalmers hood

One word.....           "WOW"    sums it up, to be interpreted anyway you please.

Well the definition of a hook is to get the hook attached to the drawbar and move the sled. I have no doubt that opening the intake valve 61.2 degrees btdc and closing it 115 abdc the engine will not start or run under its own power. However it will turn over easy, and any decent battery will propel the tractor with the starter. It will last a good many hooks with charging in between ........pank won't have to worry about starting in gear any more. He won't be able to run his own leg over this time and take out any innocent port-a-potties.

180+115+61.2 is 356.2 but it doesn't work.....trust me. It doesn't work. And then you have a very slow ramp of you go from .006 lifter rise to .016 in 69 degrees, or 34.5 on each side. You'll have a pooch. Boys with stock parts will beat up on it. At 244* at .050 there is so much intake overlap it won't make any.

You have to understand the dynamics of a Siamese port 4 cyl with a flat crank. And you don't. Just reading the fuel injection thread shows that.

wi50 wrote: 180+115+61.2 is 356.2 but it doesn't work.....trust me. It doesn't work. And then you have a very slow ramp of you go from .006 lifter rise to .016 in 69 degrees, or 34.5 on each side. You'll have a pooch. Boys with stock parts will beat up on it. At 244* at .050 there is so much intake overlap it won't make any. You have to understand the dynamics of a Siamese port 4 cyl with a flat crank. And you don't. Just reading the fuel injection thread shows that.

this comes from a guy who told his customers that a 4 3/4 bore couldn't be done and changed out a Barney camshaft that everyone on forum talks about how good they run . Anyone know what the duration of barns cam is . Does anyone care to post the 175 allis published ivo and ivc points from the power is knowledge. By the way you only have duration numbers for cylinder 1 .pank understands dynamics of Siamese ports

That's awesome. A junk throttle body hanging on a carb. See the linkage behind it ha going onthe carb......

Anyways let's play along. Prank says its a constant flow system with 4 injectors in the manifold. 1200 cfm throttle body. There's no radius and a 90* corner to get the air from a 1200 cfm throttle body into a 120 cfm manifold. So the throttle body actually hinders what an unmolested manifold could do of it had a fighting chance.

Now let me lay out out, 1-2-4-3 firing order. Constant flow spraying in manifold. Cyl 1 gets a drink, cyl 2 gets to small of a drink. Cyl 4 has had a lo g time before a drink and it's a big one and poor cyl 3 gets to small of a drink, meanwhile cyl 1 had a break and gets to big of a drink.

Now how do we controlled the air to the system? We have a 1200 cfm throttle body on a 120 cfm manifold. So the throttle plate only rotates a few degrees in order to allow the engine to get all the air it's going to get.

We controlled the fuel through a barrel valve in a constant flow system. The barrel valve is hooked by arms and linkage to the throttle shaft, or we could hook it to the throttle itself.......so we have no way to synchronise the barrel valve to the throttle as it rotates only a few degrees to get to WOT for the engine.

So this fuel system of panks must be a real marvelous piece of engineering?......an attempt to be a big shot fuel systems engineer? Or just the rambelings of an idiot?

No I think the blow hards blow each other while dreaming the engine is running while they take turns spinning the blower by hand

How about going to a roller cam? Any benefits? could a guy take a Hillborn from a SBC and cut it in 1/2 and adapt to work?

Larry(OH) wrote: How about going to a roller cam? Any benefits? could a guy take a Hillborn from a SBC and cut it in 1/2 and adapt to work?

pank says not really and it's a lot of work just to go to a smaller diameter roller. Wheel than the 1 1/4 inch allis mushroom lifter.pank says finding a cam cheap that somebody doesn't like and paying to have intake love on two and three reground helps more than anything. Keeps cost down from having full cost of having one cam ground twice

O.P.S. Heads wrote: $15,000.00 for something that(theoretically)goes down the track at 3 MPH. Simply impressive.....

slowest run to date is 9.8 miles an hour second gear