Main cap gridle

Going from 514 to a 547. Main caps look good with no walk. Should I use a main cap gridle on main caps? Block is D9 and 2 bolt mains. Thoughts?

Don’t waste your money on the cheap halo ones

Maybe machine the caps for straps and stud it

NO girdle! let em walk if they want to. Under 900 HP no problem! Girdles just put harmonics through the block and bust cylinder walls!!!!

Would you run two bolt block with a 4.50 stroke at 7,000 rpm?

Bill Heard wrote:Would you run two bolt block with a 4.50 stroke at 7,000 rpm?

I do on a d9 block turn it 7200 RPM 4.5 stroke with 6.7 rods with 2bolt mains . I have not seen any signs of walk on mine

I know a guy making 4 bolt caps for the d9 block

Yes, I am planning on running it at 7,000 rpm

Mike R wrote:Maybe machine the caps for straps and stud it

There are all kinds of main girdles out in the marketplace.
The ones which actually give support to the main caps do some good however, those which basically tie the bolts/studs together are simply a waste of money.

They make it easier to fish the bigger pieces out of the pan.

Which one would be our best choice? Thanks

Bill Heard wrote:Which one would be our best choice? Thanks

Putting steel/ductile iron caps on the block; even aluminum caps acting as shock absorbers.

Thank you Randy, I'm not an engine builder and I am a little slow, so do you mean steel/ductile iron two bolt main caps?
I do have a set of after market four bolt caps off another block that I used up last year. Just wanting to build a spare engine out of spare parts.

Bill Heard wrote:Thank you Randy, I'm not an engine builder and I am a little slow, so do you mean steel/ductile iron two bolt main caps?
I do have a set of after market four bolt caps off another block that I used up last year. Just wanting to build a spare engine out of spare parts.

Fitting better metal 2 bolt caps can work fine;
the wider stance of a 4 bolt cap when fitted correctly works better even if the outer 4 bolts are not used.

Thank you again Randy, I will just have the 4 bolt cap fitted to the bock.

Bill Heard wrote:Would you run two bolt block with a 4.50 stroke at 7,000 rpm?

I have almost 10 years on the one that is now in my brothers fox chassi and always shifted it at around 6500.            don't know if it helped but didn't hurt for sure.

I have a Canton Girdle on my blown 521 with Canton's windage tray, they are very thick sturdy pieces and fit precision, have used these on my last 2 blown engines and have had zero bottom end issues. I am running the D9TE 2 bolt block like you are . If you decide to 4 bolt a D9 block you might look at Paul Kane's web site High Flow Dynamics, he showed the cleanest way I've yet seen to 4 bolt the blocks that are not cast flush with the pan rail like the DOVE-A blocks are.