468 engine build cam option

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08-20-2020, 01:37 PM

#11

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Quote:

Originally Posted by LakeHuronPower

What fuel and cam did you run with that?

See post # 6

500EFI cam is a Crane hr cam with 230/236 at .050”, 114 LSA, and I believe 612lift ?

Edit in:

Quote:

502 Mag
224/224 .478/.478
115LSA

500 EFI
230/236 .598/.610
114LSA

525 EFI
236/244 .610/.632
114 LSA

Last edited by SB; 08-20-2020 at 01:41 PM.

The following 2 users liked this post by SB:

Baja Rooster (08-20-2020), LakeHuronPower (08-20-2020)

08-20-2020, 01:53 PM

#12

MILD THUNDER

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Some edelbrocks have 110cc chamber, some 118cc depending on the model. Even with the 110cc, youll likely be sub 9:1 with a flat top

08-20-2020, 02:00 PM

#13

Baja Rooster

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A stock 454 with zero machining puts you barely over 8.6:1 with those heads. Use the summit calculator to help figure out where you’ll be.
https://www.summitracing.com/popup/c...ion-calculator

08-20-2020, 02:08 PM

#14

MILD THUNDER

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Dont forget most bbc flat top pistons have about a 3 or 4cc valve relief

08-20-2020, 02:53 PM

#15

Baja Rooster

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Quote:

Originally Posted by MILD THUNDER

Dont forget most bbc flat top pistons have about a 3 or 4cc valve relief

True dat. If he has the larger chambers it won’t even make it to 8:1

08-20-2020, 05:24 PM

#16

fbc25el

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He would most likely have a 4.320 bore. Won't make much of a change though.

08-20-2020, 07:18 PM

#17

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Quote:

Originally Posted by SB

See post # 6

500EFI cam is a Crane hr cam with 230/236 at .050”, 114 LSA, and I believe 612lift ?

Edit in:

I just built 2 454's with the above mentioned cams. They sound great and seem to make good power. Merc 420's with upgraded HR cams. I will be running 87 octane with the little mini domes that were in the 420's.

08-20-2020, 10:43 PM

#18

Baja Rooster

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You can follow my build thread if you’d like. Same heads and a video of the cam running.

Guess the new power game!

08-21-2020, 12:51 AM

#19

MikeSXT25

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Have Dana exhaust. How much dome will I need. The 12cc SRP’s or?. I’m open to a good proven recipe

08-21-2020, 12:52 AM

#20

MikeSXT25

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Quote:

Originally Posted by Baja Rooster

Agreed.

GM’s ZZ502 crate engine uses those same heads with a similar CR to make 500+ hp. That cam sucks for marine use but the Crane 731 is slightly bigger and more marine friendly. That should get you where you need to be.

why is it Or what makes it more marine friendly

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