23° tunnel rammed 421 sbc dyno

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54chevkiwi
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23° tunnel rammed 421 sbc dyno

Post by 54chevkiwi »

Engine is at the shop waiting to be dynoed...

As a refresher, there are pics of flow numbers and the cam specs. Cam was degreed to intake valve open and the ICL fell on 110

Braswell 4760 carbs, I can't remember the sizes (can update) but I'm pretty sure they're their version of 750s..
SHP block, .904 bam solid rollers, 11.3:1 compression, 93 octane pump gas, 1.7/1.6 rockers

Anyone want to guess at a power number?

I have a number in mind. Based on the goal of this cam, it's not a power number that even needs a tunnel ram and braswells to get lol, but the goal was to have enough power and reliability to successfully complete-not necessarily place in-a drag week, without incident. That's my goal at this stage, just to successfully complete one. I already have Jones specs for a "watch out" HP cam to go in next.
Last edited by 54chevkiwi on Sat May 06, 2023 6:18 pm, edited 1 time in total.
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Re: 23° tunnel rammed 421 sbc dyno

Post by 54chevkiwi »

Sorry the cam one is sideways
PXL_20230503_233851996.jpg
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Re: 23° tunnel rammed 421 sbc dyno

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PXL_20230501_234049350.jpg
Catch can will mount to coil over shock tower on that side so there he hangs for the pic
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Re: 23° tunnel rammed 421 sbc dyno

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My home done valve spring oilers... Send oil to the front distributor drive, tap turns off the covers for lash adjustment
PXL_20230501_233443863.jpg
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Re: 23° tunnel rammed 421 sbc dyno

Post by steve cowan »

590 ft/ lbs @ 5300rpm
786 hp @ 7000rpm
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Re: 23° tunnel rammed 421 sbc dyno

Post by sbcMark »

730hp/6800rpm
575tq/5500rpm
54chevkiwi
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Re: 23° tunnel rammed 421 sbc dyno

Post by 54chevkiwi »

If it makes anywhere near that, i'll vomit lol
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Re: 23° tunnel rammed 421 sbc dyno

Post by KnightEngines »

ICL is too far retarded!
Wind it forward at least 4 degrees.
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Re: 23° tunnel rammed 421 sbc dyno

Post by Moparboy440 »

719 hp @ 6700rpm
607 ft/lbs @ 5500rpm
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Re: 23° tunnel rammed 421 sbc dyno

Post by Elroy »

What heads? I don't see where its listed
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Re: 23° tunnel rammed 421 sbc dyno

Post by af2 »

54chevkiwi wrote: Sun May 07, 2023 5:42 pm If it makes anywhere near that, i'll vomit lol
Why?
GURU is only a name.
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Re: 23° tunnel rammed 421 sbc dyno

Post by 54chevkiwi »

af2 wrote: Mon May 08, 2023 3:38 pm
54chevkiwi wrote: Sun May 07, 2023 5:42 pm If it makes anywhere near that, i'll vomit lol
Why?
I dunno, I'm kind of expecting 720. I think it'll definitely go 720, but won't be 750, so I think if it goes that high I'll plotz ....
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Re: 23° tunnel rammed 421 sbc dyno

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Elroy wrote: Mon May 08, 2023 3:33 pm What heads? I don't see where its listed
My bad, I guess that info cut off the flow sheet. Eric Weingartners 248cc wing dragon slayers, 2.125/1.575 valves, 2.8 CSA
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Re: 23° tunnel rammed 421 sbc dyno

Post by af2 »

Oh boy should be impressed!
GURU is only a name.
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Re: 23° tunnel rammed 421 sbc dyno

Post by F-BIRD'88 »

The camshaft is way too short. It will run vrry nicely but not up to your goal using that cam. These is a lot more in it with the right camshaft.
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