Will my stock rods and pistons
support 350 hp?

And if it won't will a 350's
support 400hp?

 

I think so, just don't rev your stock stuff beyond 6000 rpms. My L69 has a stock bottom end and is pushing about 300 hp, no probs after 3 summers of abuse!

 

most factory crank-rod combinations can take 450hp when clearances are correctly set.

I think the beam on 305 rods is a little thinner ... I would try to find a real 350 set but.. it should not make any real difference.. I have seen completly stock worn out 350s with 350hp that go 6000 all the time.

 

Well to be honest, the stock bottom end in a 350 realy is good for 400 horse, IF your not takin it past 6000...

To give ya an idea, we ran the race car motor up to 7000 at the end of every straight, and it never saw less than 5000 in the corners... thats a lot fo rpms to be spinning... the rules only had allowances for a stock crank and rods, but aluminum pistons could be used...

we found out that the life of that motor was about 2 seasons... we didnt have the money for a rebuild one year..


Basically, with thsat kind of stress on those rods, they stretch and eventually get brittle and break.

Steve

 

hey ride4me, do you have a 305? I don't know if this is true or not but I was told by an engine builder that 350rods won't fit in a 305. the are the same length but the width of the rods is bigger. if I'm wrong somebody please correct me, because if I'm wrong Im' gonna rebuild my 305 with some 4340 350 rods :-)

 

Quite a few of the 305s got x rods which are pretty good rods and can take plenty of power. The stock bottom end should be good to 350hp.

 

yeah I have a 91 L03 305 RS
I got a setup on paper that would put me
in the 350+horse range. I talked to a
machinst and he guaranteed it.
Just wondering If I needed to change my rods and
pistons.