Longer push rods ?

[Reed Granrt]

Originally Posted by danny waters sr

I usually shift at 6500 and now i shift at 6900 and still pulled good . Before it would slow at 7000 shift..
We have spring pressure low because engine was new and it ran so consistant we never raised the spring pressure to were we had originally checked at...Next i am going to to shim springs 30 and try that . I know this will help the flatness i have over 7200 .We already checked it for coil bind before when we had engine on stand. If this helps on the higher rpm ,we will then take the 538 gear out and go lower on it. I can only get a 28" tire under the rear(i guess because it is a 4-door and is very tight in the rear tire compartment. I run a 26" tire for the 1/8 and a 28" for the 1/4...I don't know if i want to try a 557 or a 586. I still need to make through the 1/4 mile.....Thank all of you for your help and suggestions as it has been a help to me.....I am thinking now in good weather it will run mid 7.50's in the 1/8 with the push rod change alone....

Danny
Now you have really got into this tweaking thang. May I make a suggestion, pull one pushrod"either the exhaust or intake", and go back to your starting length. Find out what the motor really likes, more intake or more exhaust or both. Once you see which it likes, try even more length on the one it prefers. Once you get what you want then have you a cam grind made with the new info and start checking all over again. You can only get so much out of a puhrod tweak and then it goes backwards as the area under the curve diminishes substantially. Man u is gittin there
reed