Main cap gridle

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Main cap gridle

Post  pigs521bbf on January 5th 2019, 12:25 pm

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?

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Re: Main cap gridle

Post  dfree383 on January 5th 2019, 3:15 pm

Don’t waste your money on the cheap halo ones
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Re: Main cap gridle

Post  Mike R on January 5th 2019, 8:35 pm

Maybe machine the caps for straps and stud it

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Re: Main cap gridle

Post  away on January 7th 2019, 10:55 am

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!!!!
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Re: Main cap gridle

Post  Bill Heard on January 7th 2019, 4:15 pm

Would you run two bolt block with a 4.50 stroke at 7,000 rpm?
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Re: Main cap gridle

Post  69F100 on January 7th 2019, 4:30 pm

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
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Re: Main cap gridle

Post  racinghabbit on January 7th 2019, 6:08 pm

I know a guy making 4 bolt caps for the d9 block
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Re: Main cap gridle

Post  pigs521bbf on January 7th 2019, 9:54 pm

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

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Re: Main cap gridle

Post  rmcomprandy on January 8th 2019, 11:16 am

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.

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Re: Main cap gridle

Post  Curt on January 8th 2019, 11:47 am

They make it easier to fish the bigger pieces out of the pan.
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Re: Main cap gridle

Post  Bill Heard on January 8th 2019, 11:51 am

Which one would be our best choice? Thanks
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Re: Main cap gridle

Post  rmcomprandy on January 8th 2019, 2:04 pm

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.

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Re: Main cap gridle

Post  Bill Heard on January 9th 2019, 2:10 am

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.
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Re: Main cap gridle

Post  rmcomprandy on January 9th 2019, 10:59 am

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.

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Re: Main cap gridle

Post  Bill Heard on January 10th 2019, 2:25 am

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

Post  57ford custom on January 30th 2019, 8:44 pm

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.
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Main Girdle

Post  blown473 on February 2nd 2019, 10:40 pm

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.
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