Endurance Short Stroke BBC
06-05-2017 | 04:45 PM
#12
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From: cleveland ohio
I bought an Ilmor supercat spec engine. It came with a 4000 dollar crank and Carrillo rods with CARR bolts.
At that point, I built the engine around the block, crank and rods I had.
I worked woth CP on a set of pistons with the proper compression height as the supercat pistons had a good sized dome on them. (Something like 12.5:1 CR)
ilmor or had those cranks made in the oddball 3.920" size in part so they could run a larger bore and still make the 510CI spec. That's what I was told by someone familiar with the program back in the early 2000's when they were doing supercat stuff.
At that point, I built the engine around the block, crank and rods I had.
I worked woth CP on a set of pistons with the proper compression height as the supercat pistons had a good sized dome on them. (Something like 12.5:1 CR)
ilmor or had those cranks made in the oddball 3.920" size in part so they could run a larger bore and still make the 510CI spec. That's what I was told by someone familiar with the program back in the early 2000's when they were doing supercat stuff.
06-06-2017 | 07:38 AM
#13
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From: Charleston, il
Now to find out if my cylinder heads will support the overall power output that I desire. I know they flow pretty good to .600" shouldn't have to lift much more than that. Current cams lift to .598" and .610". Who would be a good choice for doing a valve job on my merlin 3's and mild porting? Thanks for all the input guys, as always it is greatly appreciated!
06-06-2017 | 08:00 AM
#14
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From: chicago
Now to find out if my cylinder heads will support the overall power output that I desire. I know they flow pretty good to .600" shouldn't have to lift much more than that. Current cams lift to .598" and .610". Who would be a good choice for doing a valve job on my merlin 3's and mild porting? Thanks for all the input guys, as always it is greatly appreciated!
06-06-2017 | 08:26 AM
#15
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From: Charleston, il
06-07-2017 | 05:22 PM
#16
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From: Charleston, il
"If" I go the solid roller route looking at crane stock grinds. Part #138781 246/254 on a 114 with .615"/.636" looks good. I like that for the duration it has it doesn't lift a ton so should be easy on valve train.
11-01-2017 | 11:06 AM
#18
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From: yorkville,il
Beginning to plan out my next engine build for the ol' Formula. Currently have 454's with 500efi cams. Wanting to build a 500+ cubic inch short block to use with my current 310 Merlin aluminum heads. 600hp goal with longevity and reliability in mind. SRP has a piston for 4.560" bore that I could use with new blocks and a 6.385" rod. That makes a 523cid. Does anyone have anything similar with a 310cc cylinder head? Toying around with the idea of a Solid roller cam as well.
11-02-2017 | 07:38 AM
#19
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From: Charleston, il
tyler,a 509 [4.500 bore 4.000 stroke]a crane 168741 hyd roller cam and your heads will exceed 600 hp.i just finished the same combination but it has a set of the engine quest heads.it is going to the dyno next week,i will post the results but i am expecting 625 + or - 10.
11-02-2017 | 07:56 AM
#20
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From: Toronto, Canada
Beginning to plan out my next engine build for the ol' Formula. Currently have 454's with 500efi cams. Wanting to build a 500+ cubic inch short block to use with my current 310 Merlin aluminum heads. 600hp goal with longevity and reliability in mind. SRP has a piston for 4.560" bore that I could use with new blocks and a 6.385" rod. That makes a 523cid. Does anyone have anything similar with a 310cc cylinder head? Toying around with the idea of a Solid roller cam as well.
