Min assembly weight effect on ET

[Rob Petrie E395]

If you were able to lose 100 grams off your rod/piston weight. How much ET difference would you see? I’ve looked all over trying to find an answer with no luck.

[Paul Precht]

Zero.

[Stan Weiss]

100 grams * 8 = 800 grams / 1.7637 lbs

Let say that weight is at a 4" radius with an acceleration rate of 2500 RPS.

Stan

[MR DERBY CITY]

It sure won’t hurt …l

[Stan Weiss]

Originally Posted by MR DERBY CITY

It sure won’t hurt …l

That depends on where and how much weight was removed. Is the part now no longer as strong as it needs to be, and it is flexing which will cost you more HP than the weight saving gave you?

Stan

[MR DERBY CITY]

I have to disagree Stan. I believe the OP is referring to his LT 1 stocker and he is blueprinting the piston/rod combo to achieve the minimum weight spec set by NHRA. I dont believe he is in any danger of weakening or flexing any stocker parts…

[Rob Petrie E395]

Originally Posted by Stan Weiss

That depends on where and how much weight was removed. Is the part now no longer as strong as it needs to be, and it is flexing which will cost you more HP than the weight saving gave you?

Stan

The bulk of the weight reduction would come from a lighter rod. Production GM rod that has had small end bushed and ARP rod bolts installed vs significantly lighter Manley Rod thats on the approved list.

[Stan Weiss]

Originally Posted by Rob Petrie E395

The bulk of the weight reduction would come from a lighter rod. Production GM rod that has had small end bushed and ARP rod bolts installed vs significantly lighter Manley Rod thats on the approved list.

Then you should be fine. I took it as you were going to lighten the parts you had.


Stan

[GTX JOHN]

On our small block Mopars less than a hundred.

[Jeff Stout]

I was hoping for a better outcome. Im about 120 grams per assembly heavy. Thats basically running a ninth piston assembly