What is the max lift the stock 305 heads will hold on a TPI 305 in a 89 IROC?



Thanks
Brian Felts

 

my personal limit is in the .460 range, lot of people go more towards .500

 

I know the vortecs will only take .460 I found it out the hard way, I destroyed the guides with the lt4 cam. I was afraid the to assume the 305 heads would take even that much......so thanks for setting me up with the info. I may look into a LT1 cam for my newly found 305 TPI


Brian

 

If you ask 20 people you'll likely get 20 different answers.
Should have learned by now to just check for yourself.

takes all of 5 minutes.

 

The problem right not I don't have the time or the correct tools to make a exact measurement. I was wanting some knowledge for the future.

Now if you can tell me how you can dig down to the valve covers and pull one off.......take the rocker lose......remove the valve spring......attach a guage and a test spring all in 5 minutes?



Thanks for your help
Ede