PI heads and rocker arm options
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Teching In
Joined: Jul 2011
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From: Dirty Jersey
I was able to finally get a hold of T&D. They were a big help and was given the correct pn. I called and emailed Mast a bunch of times over last 2 weeks with no response. Jesel told me that they were on the process of making the rockers still and currently weren't available. Trying to get any pm's replied to by sponsors on here for me has been unsuccessful.
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It actually started as ET where Cary worked, then Cary bought all the LS product and started Performance Induction Specialties and continued developing product, then that company was bought by Mast and Cary heads up the Mast head program for them.
http://www.mastmotorsports.com/2010/news-view.php?id=66
I will also add I have stock LS7 rockers on my 275cc Cathedral PI heads with .670" lift and hydraulic lifters. My motor will be running next week, but I bought my entire top end(heads, rockers, lifters, pushrods and cam) from an HKE motor that made big NA power.
Last edited by RAMPANT; Jul 23, 2011 at 05:38 AM.
Thread Starter
Teching In
Joined: Jul 2011
Posts: 9
Likes: 0
From: Dirty Jersey
You have that a little backwards.
It actually started as ET where Cary worked, then Cary bought all the LS product and started Performance Induction Specialties and continued developing product, then that company was bought by Mast and Cary heads up the Mast head program for them.
http://www.mastmotorsports.com/2010/news-view.php?id=66
I will also add I have stock LS7 rockers on my 275cc Cathedral PI heads with .670" lift and hydraulic lifters. My motor will be running next week, but I bought my entire top end(heads, rockers, lifters, pushrods and cam) from an HKE motor that made big NA power.
It actually started as ET where Cary worked, then Cary bought all the LS product and started Performance Induction Specialties and continued developing product, then that company was bought by Mast and Cary heads up the Mast head program for them.
http://www.mastmotorsports.com/2010/news-view.php?id=66
I will also add I have stock LS7 rockers on my 275cc Cathedral PI heads with .670" lift and hydraulic lifters. My motor will be running next week, but I bought my entire top end(heads, rockers, lifters, pushrods and cam) from an HKE motor that made big NA power.
I am running rpm's over 8500 with 2 big stages of n20 so I want a full roller rocker. Stock rockers will work but at those rpm's and power level i feel it warrants better valvetrain components.
I do know about his work at ET and the head design there. I only gave a very short version of the PI head history. Several of my friends have used ET heads over the years, and I am unsure of the exact history but i believe RHS casted the ET heads. Then again i really don't know exactly what went down. But i do know that the design makes a ton of power and works really well.
I am running rpm's over 8500 with 2 big stages of n20 so I want a full roller rocker. Stock rockers will work but at those rpm's and power level i feel it warrants better valvetrain components.
I am running rpm's over 8500 with 2 big stages of n20 so I want a full roller rocker. Stock rockers will work but at those rpm's and power level i feel it warrants better valvetrain components.
I would do the same if I were you. The stockers will not be revving like that at all, though they made close to 750 fwhp. I had Mohawks on my TEA 245s, but only rev to 7k. I did not want to re invest that coin a 2nd time for the PI heads if I could avoid it. 750 hp is plenty for me.
Sounds like a killer set up.
