Cam Timing question for the experts on Isky 1007B
 

Re: Cam Timing question for the experts on Isky 1007B
 

Are you checking with the valves in and assembled?

The specs are taken from a lifter with no valve installed.You are out because the lash has to be taken up before you get valve movement. Do it without valve direct from lifter.

Re: Cam Timing question for the experts on Isky 1007B
 

X 2
Jim

Re: Cam Timing question for the experts on Isky 1007B
 

I am checking from the valve but with ZERO lash on that valve

Re: Cam Timing question for the experts on Isky 1007B
 

Is this a regrind or an original Isky cam? Is it marked 1007B?
Jim

Re: Cam Timing question for the experts on Isky 1007B
 

Brand new ISKY 1007B $315.00 from Reds Headers.
Pic #2 shows where intake centerline is 114* should be 111*.
Pic#3 shows TDC and timing gear marks lined up correctly.
Pic #4 shows dial indicator at .050 for opening reading off by 7*(retarded).

Re: Cam Timing question for the experts on Isky 1007B
 

Did you locate tdc with positive stop method? Not just with dots lined up.and dial gauge

Re: Cam Timing question for the experts on Isky 1007B
 

I was thinking the same thing.

Re: Cam Timing question for the experts on Isky 1007B
 

Yes,checked and rechecked. TDC on the wheel is acurate. If the degree wheel was off the closing event would be off by the same amount as the opening event as with the centerline but the closing event is only off by 1* the centerline by 3-5 degrees depending on the method and the opening about 7-10*. Im fairly certain the cam is ground wrong or maybe the card is wrong but I dont think the card is.

Re: Cam Timing question for the experts on Isky 1007B
 

I know it's a pain, but you may as well return it. If it was me, I'd talk to Pete. He posts here. He did my Potvin 425 and it's dead nuts.
Jim

Re: Cam Timing question for the experts on Isky 1007B
 

Pete recommended this cam thats why I bought it. Im hoping he chimes in. Maybe I can get away advancing it some, but thats still a bunch of BS. I would maybe expect that from a cheaper cam but ISKY???? Words cannot describe the level of pissed I am right now!

Re: Cam Timing question for the experts on Isky 1007B
 

Time to talk to Red's

Re: Cam Timing question for the experts on Isky 1007B
 

You cannot check cam timing without the timing cover in place and camshaft end-play properly controlled. Any forward-rearward movement of the cam alters timing as a result of gear tooth angle.

Re: Cam Timing question for the experts on Isky 1007B
 

Very true. I made up a tab to hold the cam in place during the degreeing process.

Re: Cam Timing question for the experts on Isky 1007B
 

JWL thanks for the reply I will try it with the cover. I thought that might be the case but each time I checked timing events I made sure the cam was pushed back while I stopped at the measuring point but it really wasn't try to move out the front. I will try it with the cover on and post the results. I sure hope that's what it is but I'm pretty sure it's going to be the same result.

Re: Cam Timing question for the experts on Isky 1007B
 

I hear that there are some isues with the SCAT cranks ( machineing problems) ...could be in the keyway on the crank snout is off...Just a thought

Re: Cam Timing question for the experts on Isky 1007B
 

He said he checked TDC and the marks align, so i think that rules that out

Re: Cam Timing question for the experts on Isky 1007B
 

And talk to Jim at Reds

Re: Cam Timing question for the experts on Isky 1007B
 

Yep I see your right ,my bad.

Re: Cam Timing question for the experts on Isky 1007B
 

I tried it with the front cover on. Re verified TDC with piston stop, re zero'd Dial indicator and at .050 of valve lift (with zero lash) without the cover i got 0* or TDC with the cover and after resetting everything, it is actually 1/2* ATDC which is basically the same reading but it did slightly change 1/2* and is even further retarded from what it should be. The 3rd pic shows where it should be.

Re: Cam Timing question for the experts on Isky 1007B
 

Are the adjusters in the lifters a tight fit? Silly question, I know, but a little slop here might cause a retarded reading.

Re: Cam Timing question for the experts on Isky 1007B
 

They are tight I wish I could find anything else that it could be but, Im afraid the cam is just ground wrong. A few guys over on the HAMB have had the same deal with cams from Isky too. I keep hoping its not, but looks like I will be pulling it back out. And the customer service at Isky was not good either.

Re: Cam Timing question for the experts on Isky 1007B
 

Its good you know how to degree the cam. just think how some people would have just put it in then wonder why there motor was a dog. sounds like time to call Jim

Re: Cam Timing question for the experts on Isky 1007B
 

So, if I understand the situation---the opening point is retarded but the closing point is reasonably accurate? Is that right?

Only two things can cause such a problem:
1. The cam is ground with insuffcient duration.
2 Something within the measuring system is inconsistent.

As many times as you have been through this deal and if the same results keep popping up I would have to point to the camshaft.

Have you read my book? It includes a discussion on camshaft endplay correction.

Re: Cam Timing question for the experts on Isky 1007B
 

JWL I have not read your book, I'm new to flatheads but I've built many racing DOHC motors in which cam timing is critical. I have a fair amount of experience degreeing cams. I'm confident what I'm reporting is accurate. I am certain the cam is ground wrong. The cam timing results on this cam are consistant (I've done it over and over hoping I was missing something) I have NEVER had a cam be more than about 1-2 degrees off from spec this was the first (and last) Isky cam I'll ever buy. Now I have to find a similar grind in another brand.

This is where I was hoping to get another recommendation from you Flathead guys like JWL or Pete or Ol'Ron that know what works from experience. Im looking for a good bottom end /midrange cam for a 286 8ba with EAB (decked) heads, dual carb, headers, 3 speed trans no O/D for a light car. I usually run a 3.12 gear and drive alot on the interstate so 2500rpm cruising rpm. I doubt it would ever see over 4000 rpm Pete reccomended this Isky and I would like something with similar specs but I've lost all Faith in the Isky brand.

Re: Cam Timing question for the experts on Isky 1007B
 

Could the cam gear be off? Its just a thought?

Re: Cam Timing question for the experts on Isky 1007B
 

I wish it were something that easy. Unfortunately for me its not. Simply put the cam is ground wrong, well maybe its ground correctly but its not the grind I ordered or the cam card says it is. What a shame too, Isky been in business 70+ years and can't check a custom grind to make sure its right before they ship it out? I wonder how many guys just put them in not knowing they are wrong?

EDIT: I went ahead and checked the Exhaust too same thing the opening is off by 7 degrees at both .020 and .050 but the closing points are correct. The max lift is also correct I didnt bother with the lobe center.

Re: Cam Timing question for the experts on Isky 1007B
 

What about this Schneider instead of the Isky? http://schneidercams.com/250Fflathead.aspx

Re: Cam Timing question for the experts on Isky 1007B
 

Just an Update, I was able to get an unused 1007B regrind done by D&L Automachine from a Fordbarn Member. I put it in and it checked out good.

Re: Cam Timing question for the experts on Isky 1007B
 

good deal, Im glad you got it rite. I admire your persistance to get it rite

Re: Cam Timing question for the experts on Isky 1007B
 

This is an old thread, but I wanted to comment on the fact that when you get a cam done by Pete at D&L, you can trust the work . . . there is NONE better!

Re: Cam Timing question for the experts on Isky 1007B
 

After reading all of these comments, I would take a wild guess and say that Isky has thrifted their manufacturing process to another country (somewhere west of Hawaii), or at least the machining part.

Sal

Re: Cam Timing question for the experts on Isky 1007B
 

Dale .. Pure conjecture my friend ! !!! You have never used 1 of my cams.....
I have sold so many & have yet to have the first issue or unhappy user of one of my cams !!!
With all due respect to "Pete" my cams are as good or better than any regrind out there !!! I to can supply "Isky" original copies .. But as many know "I" have something way better !
Cheers
Tony

Re: Cam Timing question for the experts on Isky 1007B
 

Cam timing can be frustrating, especially when something is wrong. I doubt the adverage guy wouldn't notice anything wrong with the engine with only a few degrees of error, but that no excuse. I started checking cam back lash after JWL suggested it, and their allover the map, I had one with over .020" had to put a shin behind the gear, I alway ran L-100's in my street engines, they sounded great and pulled well over 2500, peeked out around 4800 on the dyno. I have several engines out there with 1007B cams in them and one is still on the floor someplace ( right Ken) the other is driving around someplace. Pete can probably fix it, but i'd get on Iakies ass.

Re: Cam Timing question for the experts on Isky 1007B
 

We have installed a 1007B in our new build from a cam we had in stock, but from research it might appear that the 1007B is no longer in production . Please prove me wrong. Is this correct or wrong. Sad face if wrong. It's a nice medium mild torquey cam with a relatively subtle idle. I have recommended this cam to a couple of new builders seeking a mild street cam.

Re: Cam Timing question for the experts on Isky 1007B
 

I did have same issues with factory ISKY cams, I m now working with schneider, D&l, And Kiwil100 only.

Re: Cam Timing question for the experts on Isky 1007B
 

Sounds like this guy knows what he's doing. Most cams miss the mark by a few degrees, and I blame that on myself, However when a cam is this far off, you recheck everything more than once. Time to make the call.

Re: Cam Timing question for the experts on Isky 1007B
 

Very few cams are "dead-on" when installed simply based on the cam/crank gear marks. There's a whole bunch of reasons that it may be off, not necessarily the grinders fault.

For future builds here talk with your machinist about having the cam gear and cam set up to be able to move it fairly easily by "pinning" the cam, same setup as a SB/BB Chevy. We do them here fairly often!

On a side note we haven't had a single Isky problem, we stay with them or Comp Cams nowadays. I would trust some of the cam guys up here also.

Thanks, Gary in N.Y.

P.S. Here's 2 shots of a finished cam snout/timing gear pinned and able to be moved a fair amount IF necessary! Uses conventional Chevy bushings, these are always readily available.

Re: Cam Timing question for the experts on Isky 1007B
 

This is an old thread but Ed Isky himself called me today because he had heard of the 1007B problem. The 1007B has not been offered by him for many years.
It will be interesting to see what comes of this.

Re: Cam Timing question for the experts on Isky 1007B
 

While having a method to adjust the cam timing (via the pinning or alternate setoff holes methods) works, it would not have "fixed" the cam in this case. The exhaust timing was about right, the intake was way off - nothing can fix that except a different cam. Maybe the original cam was a poorly done regrind by somebody other than Isky . . . as like Pete, I have not known of them making this cam in quite a few years. Will be interesting to see what Pete hears back.

This whole issue is exactly the reason I have Pete do my regrinds for the 1007B, the Potvin 3/8 and the Potvin 425 - his work is really nice and he and I like to drink 'martooonies' and 'tootie fruities' when we have a chance (only after the cam work or racing is done! LOL).