Rough HP / Torque Estimate?
07-09-2016, 09:12 AM
#11
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im finishing up a very similar build right now. 489", 800 holley, performer rpm airgap, 9.3-9.5 comp, 781 heads with 2.19 1.88 valves.
here is the cam in the engine. https://www.summitracing.com/parts/h...5-12/overview/
im shooting for 475 hp.
id be worried about that compression and cam combo. the engine will probably want more duration to bleed off some compression to not detonate itself to death. it will more than likely be very timing sensitive id guess 430 hp.
here is the cam in the engine. https://www.summitracing.com/parts/h...5-12/overview/
im shooting for 475 hp.
id be worried about that compression and cam combo. the engine will probably want more duration to bleed off some compression to not detonate itself to death. it will more than likely be very timing sensitive id guess 430 hp.
Last edited by beaver 3; 07-09-2016 at 09:17 AM.
07-11-2016, 05:04 PM
#12
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218* duration cam, in a 496ci , oval 049 heads, would work great in a dually truck! Should make peak torque right around 2800rpm. HP peak, I'd guess between 4500-5000.
502 415hp Mag cam was 224/224, 500EFI was 230/236, 525EFI 236/244, all were around 8.75 static and ran on 87 oct.
With that 218* cam, 10:1 static, I'd be running premium for sure, and be real careful on the timing advance curve. That thing is gonna be making some cylinder pressure getting the boat on plane.
502 415hp Mag cam was 224/224, 500EFI was 230/236, 525EFI 236/244, all were around 8.75 static and ran on 87 oct.
With that 218* cam, 10:1 static, I'd be running premium for sure, and be real careful on the timing advance curve. That thing is gonna be making some cylinder pressure getting the boat on plane.
How about the 11-451-8 as a starting point, 230/230, .547/.547 lift?
https://www.summitracing.com/parts/c...make/chevrolet
