Power Differences

[dirtdevil]

I know so much depends on many variables like cam, carb, etc. But in an outlaw mod that will only run a 1/2 track w/ no claim rules. What kind of differences would there be in following combos?

3.75 stroke w/ 6.125 rod
3.875 stroke w/ 6.00 rod
4.00 stroke w/ 6.00 rod

Also the heads would be a set of RHS aluminum 12062 64cc 235Int runner Intake HV1000

[perfconn]

The last 3.75 stroke w/6.125 I did dynoed 715hp.The 4inch stroke would probably dyno 745hp on the same dyno.The 3.875 stroke would be somewhere inbetween.You need to realize every dyno will be different.

[LateModel B23]

Perfconn - guess who this is !! It has been so long I had to re-register on here.

I am going to be building a new motor for the mod for 2013. I have a question based on this original post. We will be running the Bowl with it, based on your visit that time - What do you think?

[perfconn]

Bill,
Haven't forgot you.I quite simply don't believe in puting a longer stroke than a 3.75 in a standard deck 9 inch block.I think on an 8 inch tire that would be more than enough motor even at the Bowl.
How is the blueprint buisness doing?

[LateModel B23]

Been busy.

Been running that old 3.875 stroke w/ a cam I got from you years ago. Finished 5th in points. My son is driver now. Michael taking some time off.

[perfconn]

I have retired now.I closed my shop because of the economy but I still help some of my old customers.In fact the 409ci that I referred to is being redone now.It only has Brodix 11X 23* heads on it and made 715hp.