Has anyone had to use 7.625 pushrods in their build? My shop said 7.625 is what pr should be and that made 1 1/2 turns to 22ftlbs on my stock rockers.

Engine has 1600 miles on it now but I'm a bit paranoid about this, car seems to run strong with no issues but will I have any later because of this?

Build is in sig below, the heads do have the 3/4 in. deck and were milled 10 thousanths.

 

what were the cc's of the heads after you had them milled down?

7.625 seems way long...... you using stock lifters?

 

stock lifters that cam in new gm longblock heads were 64cc before milled

 

I really think thats to long. Measure it yourself, to make sure. I used 7.450, and my rockers backed off, due to bottoming out the lifter, and false tourque reading. Keep a close eye on your rockers if you think there right, good luck.

 

its hard to beleive my tech could be that far off had the work done at the WS6 store and they have a great rep other people that I have talked to that have used predator heads with the thicker deck were using 7.550 but a different cam than I am

 

Predator heads may require that long of a pushrod. I don't know what the recommended length was. Patriot went under before those heads took off.

The original TFS heads required 7.600" pushrods, but they revised them and made the 7.500" standard.

 

Didnt know they went outta business, what was the reason? bankruptcy?

I never did like when a good company goes out of business

 

https://ls1tech.com/forums/ls1tech-s...-business.html

 

Patriot has already reopened under a different name, and they are continuing to sell the same castings as before just so you know. They posted up their new website on YellowBullet just in the past couple days but there isn't much info on it right now.

 

I had heard that. Still makes me nervous...

 

interesting... anyway OP if your unsure, buy a PR checker and do it yourself so you'll have a definitive answer with no guessing...

 

Not sure on those heads but I believe Texas Speed will sink the valves a little deeper to gain PTV. Could this be a reason for the longer pushrod?