Stage 2 block

[rag231]

After many many years of chasing down my stage 2 parts from a machine shop that kept having to move for various reasons I have got 2 of my blocks back. One question is about the 6 bolt mains. How common is it just on the center 2 vs. the center 2 + front vs. all? These 2 blocks are both on center. My next question is about cranks. I have an off center shortblock with a 3.4 stroke crank, the bore is 4.005 , am I leaving any hp on the table by not switching to my either of my stroker cranks. I will be running stage 2 heads on this and when this motor was built before, 8500+ rpm was no problem. Take the high rpm route or the lower.

 

[2QUICK2B6]

I would say so

 

[forcefed3.8's]

There are 3 versions of the on center blocks. First was the 2 bolt outer, 4 bolt center, then 4 bolt front, rear, center. The latest, and most rare are 4 bolt outers (cross bolted), and 6 bolt center.

 

[norbs]

The smaller the motor more efficient it is, but the trade off is torque. However , do what you can afford to do...........either can be made to work.

 

[Boostdeznuts]

What's block# is the one with 6 bolts center?

 

[forcefed3.8's]

They are all 25500153

 

[Boostdeznuts]

Oh ok. Am keeping that one then lol

 

[rag231]

Yeah I have one with all caps that are 6 bolts.

 

[750H.P.V6]

The front and rear cap should only have 4 the middle two have 6 bolts. If you've got one with all 6 bolt caps please post a pic of the bottom of the block.

THX

Neal

 

[coach]

The front and rear cap should only have 4 the middle two have 6 bolts. If you've got one with all 6 bolt caps please post a pic of the bottom of the block.

THX

Neal

Yeah...I've never seen splayed front or rear main.


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[rag231]

I stand corrected the front and rear are 4 bolts each. The main caps for the blocks were tie wrapped together in the pics that were sent to me. Time to find a new machine shop. I am done with that one!