Slant Six Forum
https://www.slantsix.org/forum/

Isky Cam
https://www.slantsix.org/forum/viewtopic.php?t=20867		 Page 1 of 2
Author:  dakight [ Fri Nov 24, 2006 1:48 pm ]
Post subject:  Isky Cam
I was stripping down the aluminum block today. Found a broken lifter bore so it's scrap. But, in the process, when I pulled the cam, I found an Isky Z-50E4. I looked it up and it looks like it's 256* advertised duration and .425 lift. I plan for the car to be a street cruiser, not a racer, with occasional trips at freeway speeds. Is this cam a good performer for that purpose or should I spend the extra cash for the Erson 270 or something else? Final drive ratio will be 3.23 with an A904 pushbutton slushbox behind the engine.
Author:  SlantSixDan [ Fri Nov 24, 2006 2:16 pm ]
Post subject: 
256° advertised duration, 0.425" lift sounds like a durn-near-perfect cam for the usage you intend. I'd use it and spend what would've been the cam cash on something else!

Sorry to hear about your busted aluminum block :-(
Author:  dakight [ Fri Nov 24, 2006 2:40 pm ]
Post subject: 
Thanks Dan. I probably wasn't going to use it anyway with the corrosion at the top. I was stripping it down to send to someone else who had indicated interest but I doubt that he'll want it now.

It's always nice to find little treasure where you don't expect them, this cam is one of those. The engine had obviously been rebuilt shortly before it was pulled from the car. The cam shows very little wear and the lifters still have the slightly domed surface on the bottom. In addition to the busted lifter bore, the engine had 2 spun rod bearings.
Author:  Ron Parker [ Fri Nov 24, 2006 4:50 pm ]
Post subject: 
I know you know this so im not being a smart ass but make sure you match each lifter with the cam lobe. :D Thanks Ron Parker












It Aint Over Until I Win
Author:  dakight [ Fri Nov 24, 2006 4:54 pm ]
Post subject: 
Quote:
I know you know this so im not being a smart ass but make sure you match each lifter with the cam lobe. :D Thanks Ron Parker

Thanks for the reminder Ron. I will be using all new lifters anyway.










It Aint Over Until I Win
Author:  Ron Parker [ Fri Nov 24, 2006 5:11 pm ]
Post subject: 
Maybe Dan can jump in here but I have always used the same lifter that the cam was broke in with. I match the used cam with the same lobe used lifter. Just A racing tip i have heard may not be valid. Thanks Ron Parker :D










It Aint Over Until I Win
Author:  dakight [ Fri Nov 24, 2006 5:23 pm ]
Post subject: 
Trouble is, I wasn't expecting to find anything other than a stock cam so I didn't preserve the position of the lifters. It might be ideal to do that but I've used new lifters on a used cam many times with no effect.

**make that "no ill effect."**
Author:  Ron Parker [ Fri Nov 24, 2006 5:46 pm ]
Post subject: 
Ok you go dude Thanks Ron Parker :D













It Aint Over Until I Win
Author:  argentina-slantsixer [ Fri Nov 24, 2006 7:22 pm ]
Post subject: 
Quote:
Maybe Dan can jump in here but I have always used the same lifter that the cam was broke in with. I match the used cam with the same lobe used lifter. Just A racing tip i have heard may not be valid. Thanks Ron Parker :D
I always use the lobe matched lifter method and I haven't seen any sweeped lobe in years. Other fellows with cam/lobe issues have used new lifters in a broken in cam... :roll: I guess is a matter of luck... and if the cam is a new grinf on a new shaft you'd be on the safe side...
Author:  SlantSixDan [ Fri Nov 24, 2006 7:54 pm ]
Post subject: 
The way I always heard the rule, it was to keep used lifters on their same lobe. New lifters are OK, and used lifters on their original lobe are OK, the "no-no" was used lifters on lobes other than their original.
Author:  argentina-slantsixer [ Fri Nov 24, 2006 8:26 pm ]
Post subject: 
Quote:
The way I always heard the rule, it was to keep used lifters on their same lobe. New lifters are OK, and used lifters on their original lobe are OK, the "no-no" was used lifters on lobes other than their original.
I've heard of "no-no-no" cases in replacing broken in lifters, but only if the cam grinder is so $#!+ that he uses old shafts and poorly fills them and regrinds. Bad craftmanship is bad craftmanship... eh? I thought that once you break in the cam it wasn't OK to replace the lifters....
Author:  73NorthernDuster [ Fri Nov 24, 2006 10:37 pm ]
Post subject:  Isky Cam
Fyi I bought this cam in the summer and put it in my newly rebuild engine a few weeks ago. The cam was off by 14 degrees, one whole tooth on two separate timing sets. Make sure you degree your cam when you put it in a new engine.

It may have just been mine but never trust the grinder... Just my 2 cents.
Author:  dakight [ Sat Nov 25, 2006 3:41 am ]
Post subject: 
Quote:
The way I always heard the rule, it was to keep used lifters on their same lobe. New lifters are OK, and used lifters on their original lobe are OK, the "no-no" was used lifters on lobes other than their original.
That's the rule I've always followed. There've been several times when I found in necessary to replace a single hydraulic lifter because it had collapsed. Now, if there is severe wear on the cam lobe, all bets are off because lobe angle will be wrong and the lobe will dig into the lifter surface. In this case the grinding marks are still visible on the lobe of the cam. My guess is that the engine failed shortly after installation. At any rate, I'm going to give it a try and I will be watching it closely.

73Northern, I will definitely degree the cam; that's a given. Thanks.
Author:  Rug_Trucker [ Mon Dec 18, 2006 8:03 am ]
Post subject: 
Definately keep in mind that new oils will junk a new cam quick. Use GM EOS in there for break in.

The zinc has been removed or reduced in most car oils. They are removing it in diesel stuff too like Rotella.
Author:  dakight [ Mon Dec 18, 2006 6:08 pm ]
Post subject: 
GM EOS? What's that?
Page 1 of 2 All times are UTC-08:00
Powered by phpBB® Forum Software © phpBB Limited
https://www.phpbb.com/