I just put in my isky solid roller(again) and it said on the card that the cam only had 1.5 degrees advance and it is ground on a 110, so i put my crank gear on 2 degrees advanced thinking that would give me 3.5 degrees advanced and be installed at 106.5. Well all of my numbers at .050 and .020 were off, when added up my total duration numbers would be off by about 3-4 degrees. When i checked the ICL it was at 104 degrees. I think isky messed up on the paper and it really had 4 degrees built in and when i put my crank gear at 2 advanced i came up with 104, so i will pull it back off and put it straight up. But am wondering if this would through off my duration numbers also? the numbers at .050 and .020 were off and so was the total duration?

Cody,
The only way to change the duration of a cam is to regrind it. It has nothing to do with how it is installed, it is determined by the way the lobes are shaped. As far as your degreeing "problem" dont just assume that your timing set was made correctly. Just becasue you had it dot to dot, does not mean it was correct. Thats why you degree a cam in the first place, to correct for all the messed up parts :)
Advanceing the cam will change the opening and closing numbers, but the total duration will be the same.

I am starting to get aggravated here, but don't want to flame anyone since i am no expert but the first solid roller i got from isky i got weird numbers and the duration was off, when they checked it they found it was off but not by the same numbers i came up with, so they ground me a new cam (took them 3 weeks!!) now it seems this cam is off also, here is what i got;
Iskys specs
.020 Intake
open 37
close 71
.020 Exhaust
open 80
close 34

.050 Intake
open 21
close 55
.050 Exhaust
open 63
close 17

My numbers
.020 intake
open 42
close 70
.020 exhaust
open 85
close 34
.050 intake
open 25
close 52
.050 exhaust
open 68
close 15

There duration numbers are
.020 = 288/294
.050 = 256/260

My numbers
.020 = 292/299
.050 = 257/263

What the heck is going on here??? I verified TDC 3 times using the piston stop method and using a dial indicator, these numbers are all of the lifter. Are the people at Isky Retards? or is something fishy here? i don't want to send back another cam!!i

Cody,

There's a very simple explanation, I believe.
Isky is quoting you the numbers that they designed and made, ON A SBC BASE CIRCLE. When the cam master is ground on a BBC base circle, the cam apparently 'grows'. Although I personally believe the engine doesn't really see or understand .050" durations, all of us, including me, use them in our cam descriptions.
You are seeing the difference in Pressure Angle caused by the larger BBC base circle size. Isky has not explained this to you, and it does not mean the cam is ground wrong. The difference you are getting from the cam and the card is about normal, plus the actual finish-wheel size will alter the numbers a degree or two, also.
Check the ICL by measuring .050" either side of max lift, and put the cam where you want it. I wouldn't worry about those few differences in degrees.....

UDHarold

I just put in my isky solid roller(again) and it said on the card that the cam only had 1.5 degrees advance and it is ground on a 110, so i put my crank gear on 2 degrees advanced thinking that would give me 3.5 degrees advanced and be installed at 106.5. Well all of my numbers at .050 and .020 were off, when added up my total duration numbers would be off by about 3-4 degrees. When i checked the ICL it was at 104 degrees. I think isky messed up on the paper and it really had 4 degrees built in and when i put my crank gear at 2 advanced i came up with 104, so i will pull it back off and put it straight up. But am wondering if this would through off my duration numbers also? the numbers at .050 and .020 were off and so was the total duration?
=
Cody,
The 1.5 is cam degrees which is 3 at the crank & in a perfect world would put you at 107.
If you added 2 more CRANK DEGREES this would put you at 105 again in a perfect world.
You came up with 104 which is pretty damn close.
As for the duration, I would say Harold covered it pretty good as usual :)

Quit screwing around with the damn thing & put it together :D :D

I am assuming your chain got there,,, the dummies at the warehouse sent the first one to me & I had another sent to you :mad:

i will call isky again tomorrow, i still think they have their heads up their asses and are unorganized. This was the same problem i had with their last cam, and when i sent it back they agreed something was wrong. Why would a cam manufacturer quote duration numbers, if that isn't what your engine would see?? I guess i will call them tomorrow and let them know, but still run the cam. I will probably put it at 106 ICL and call it a day
It is so amazing in this business how EVERYTHING you buy is not what it is supposed to be, or you are promised things and aren't deliverd, or no one answers the phone, or it doesn't fit, or this or that....... not only Isky but so many other companies, it seems like 1 out of 3 things that i order or buy, there is some kind of problem! IF its not Iskys cam, its Speedtech not answering the phone or lying about shipping, if not them its Hotchkis and their bar bender is out of service, if not them its autometer and their malfuctioning electronic speedo, if not them its global west and their poor delivery time, if not them its lees power steering taking forever to ship, if not them its painless wiring not giving the right connectors, or not including the correct hookups for a stock AC car, if not them its my aluminum battery hold down that makes the terminals come in contact with it, if not that its AFR's valve spring heights not being correct, the valve spring cups stuck in the head, one of the titanium retainers being machined incorrect, and being lied to about the shipping time, if not them its Milodons windage tray mountint holes being way off, if not them its Lunati sending you 2 cams that don't have any advance ground into them, if not them its the machine shop telling you they aline honed your block and your clearances are perfect and they are not at all, if not that its grants steering wheel take off adapter getting all loose and sloppy in only a month(have seen this 5 times) if not that its Pypes tailpipes not fitting worth a damn, if not that its moroso not including any instructions with anything they send you, if not that its Pi-Thon hose locks not producing the fittings you need in any type of time, and the list goes on and on and on!! THe funny thing is, every single person or place listed above make really great products and have excellent people working for them, but it seems as if eveyrone has their headsd up their butt. I would have to say the only people i have dealt with that I have had NO problems with would be;
Summit racing
Mike lewis
Hydrboost.com

wow, what a rant!

For the custom ground stuff, I have found that most of the lobe configurations are based on a 1" base circle unless stated otherwise. Found the same thing with the 233/236 I have here.

My SB Camp cam was 3º longer than speced. All of it between .050" and .006" on the closing side.

well another thing i am noticing is that it says there is .400 cam lift but i get .505 off of the lifter?? maybe i will just go with a custom comp grind and send this one back? I will call them first and see what they have to say, for $350 i don't want a cam with 5 degrees too much duration.

well i talked with rod today and i will just run the cam as is. It still isn't 100% but it should be fine. I would have to say that Rod at isky really bends over backwards and is a nice guy but it still sucks that it isn't %100