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Re: Isky, Piper and other performance camshafts for the 2.5 V8

Posted: Sun Sep 10, 2017 8:47 am
by Sonus
daimlersteve wrote: Fri Sep 08, 2017 10:45 am Whats you head flows ?
steve.
Ps. Dropped the new pistons and bearing into the machinist today, with any luck there might be some progress in the next few weeks.
This is what the computer spat out :)

Re: Isky, Piper and other performance camshafts for the 2.5 V8

Posted: Sun Sep 10, 2017 9:03 am
by daimlersteve
Sonus,
I can email you a graph comparing std with various others i have measured. Would have to tidy the page up for another to understand it. If you'd like it let me know. One of mine ( the current in the car ) but not the more recent iteration is laid out by the thou lift /degrees.( about four pages of numbers) Much easier to read as a graph. Even going over the nose it is quite differing on the lift to the closing side. The usual method of setting up 10 degrees either side of full lift will have it installed incorrectly as the full lift is over 3+ degrees. This cam and the new one are set up on the 50 thou lift data. Of course if the head is not in tune with the cam it aint going to be up to expectations.
steve

Re: Isky, Piper and other performance camshafts for the 2.5 V8

Posted: Sun Sep 10, 2017 4:18 pm
by Sonus
I'd really appreciated that Daimlersteve. I believe you have my e-mail address?

Re: Isky, Piper and other performance camshafts for the 2.5 V8

Posted: Wed Jul 18, 2018 9:29 pm
by Ozzsp250
Finally getting a chance to get back to the forum.

Have moved back to Arizona so car and the engine I'm building are all here. I was going through my documents and came across the Isky cam that is in my engine.

Have not had the opportunity to run the engine again to trouble why the right carb is flowing twice the air that the left carb is. I have redone the linkages, re-bushed as needed and both butterfly plates appear closed. Need the weather to cool a bit as the garage is over 110 degrees F about 43 C!

Re: Isky, Piper and other performance camshafts for the 2.5 V8

Posted: Thu Jul 19, 2018 3:08 am
by daimlersteve
A typo there on that sheet,--- the 50 thou lift will always be less duration than the advertised.
steve

Re: Isky, Piper and other performance camshafts for the 2.5 V8

Posted: Fri Jul 20, 2018 7:24 am
by Christopher Storey
Yes indeed, Steve. I could not understand how with greater lift used as the measuring point, the overlap would be greater. It calls into question all the information given on the diagram ( and makes you wonder just what cam you are getting )

Re: Isky, Piper and other performance camshafts for the 2.5 V8

Posted: Thu Jul 26, 2018 11:17 am
by daimlersteve
Any update ?

Re: Isky, Piper and other performance camshafts for the 2.5 V8

Posted: Fri Aug 03, 2018 7:23 am
by Sonus
I have decided to go with Penta Motorsports camshaft. I believe they have them made by Bullet camshafts - http://www.bulletcams.com/

Re: Isky, Piper and other performance camshafts for the 2.5 V8

Posted: Wed Jan 09, 2019 9:35 am
by Sonus
Here is a chart showing the current camshafts I have been able to track down.

I take no repsonsibility of any incorrections

Re: Isky, Piper and other performance camshafts for the 2.5 V8

Posted: Wed Jan 09, 2019 9:42 am
by Sonus
I have the spec sheets available, but they are too large to post on this forum. Send me a message and i will pass them on.