BBC Production Block/Heads Dyno Test - Chevelle Tech
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post #1 of 27 (permalink) Old May 21st, 20, 10:12 PM Thread Starter
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MARK
 
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BBC Production Block/Heads Dyno Test

A while back I built a 4.310 X 4.250 496 for a customers street driver/race in his 70 Camaro. 10.15 compression, I was looking for 10.4 but didn't want to cut the 781 heads any more than to surface and set the CCs. A Edelbrock Perfprmer RPM was used with a 850 Holley and a 1 inch open spacer. My cam was a .650 lift solid roller, 255 @ .050, 110 LS. I used a 445 4 bolt block, with the customer ordered Molnar crank and "power adder rods" bob weight was 2128. We did quite a bit of work to the crank. I used a Moroso oil pan with modifications. Other parts included: Mahle pistons, M77 oil pump, Scorpion rockers, .083 wall moly pushrods, Ferrea valves, Comp cams springs, Comp retainers, Comp inside locators, Comp roto coil eliminators, blue viton valve seals, Rollmaster timing chain, FelPro 1037 tight head gaskets, Mr gasket 5827 intake gaskets, Morel lifters. I tested it on 91 octane pump gas and 10/30 conventional Maxima oil. I wish I would have had some Q16 and LAT oil, probably worth 25 HP more.


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post #2 of 27 (permalink) Old May 22nd, 20, 12:29 AM
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Dan
 
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Re: BBC Production Block/Heads Dyno Test

Go ahead, keep us in suspense. Lol
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post #3 of 27 (permalink) Old May 22nd, 20, 2:40 AM
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Re: BBC Production Block/Heads Dyno Test

mmmm..... I'm gonna say 700hp/675tq

-Kevin
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post #4 of 27 (permalink) Old May 22nd, 20, 3:21 AM
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Re: BBC Production Block/Heads Dyno Test

I think 735hp/705tq.

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post #5 of 27 (permalink) Old May 22nd, 20, 9:02 AM Thread Starter
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Re: BBC Production Block/Heads Dyno Test

Quote:
Originally Posted by Malibu ss 64 View Post
I think 735hp/705tq.
Marcus

I appreciate your confidence but lets not get unrealistic, numbers actually mean something. Heres the data:
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post #6 of 27 (permalink) Old May 22nd, 20, 9:46 AM
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Re: BBC Production Block/Heads Dyno Test

679 lb.ft. @ 4800 and it's already on the downside of peak tq.

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post #7 of 27 (permalink) Old May 22nd, 20, 10:33 AM
 
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Re: BBC Production Block/Heads Dyno Test

Very nice Mark!!!

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Why is it we never have time or money to do it the right way in the beginning but we always have time and money to do it over again?
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post #8 of 27 (permalink) Old May 22nd, 20, 10:33 AM
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Re: BBC Production Block/Heads Dyno Test

Quote:
Originally Posted by VORTECPRO View Post
Marcus

I appreciate your confidence but lets not get unrealistic, numbers actually mean something. Heres the data:
Kevins guess was spot on!
Anyway outstanding nrs

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post #9 of 27 (permalink) Old May 22nd, 20, 10:43 AM
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Re: BBC Production Block/Heads Dyno Test

Very impressive, Mark....yet again.

And thanks for sharing. Just in time for a bizarre holiday weekend.

Stay safe everyone....and enjoy Mark's build.

'69 Malibu 383/TCI TH350/8.2 3.36 Eaton Posi. Street Edge 10" 2800, E-Tec 170s, Custom Mike Jones HR Cam, RPM Air-Gap, StreetAvenger 770, Pertronix HEI, Hedman 1 5/8" Headers, Moser Axles, PMT 1320R Kit. [email protected] 111 MPH, 1.6865 60 ft, Nitto 555
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post #10 of 27 (permalink) Old May 22nd, 20, 11:57 AM
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Re: BBC Production Block/Heads Dyno Test

single pattern cam?
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post #11 of 27 (permalink) Old May 22nd, 20, 12:20 PM
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Quote:
Originally Posted by 65cayne View Post
[IMG class=inlineimg]/forums/images/Chevelles_2016/smilies/tango_face_glasses.png[/IMG] mmmm..... I'm gonna say 700hp/675tq
Quote:
Originally Posted by VORTECPRO View Post

Marcus

I appreciate your confidence<img src="https://www.chevelles.com/forums/images/smilies/thumbsup.gif" border="0" alt="" title="Thumbsup" class="inlineimg" /> but lets not get unrealistic, numbers actually mean something. Heres the data:
I was so close! Very nice build!

-Kevin
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post #12 of 27 (permalink) Old May 22nd, 20, 12:50 PM
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Re: BBC Production Block/Heads Dyno Test

Nice! How much are the collectors you have on there worth over the mufflers I usually see?

Jim

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post #13 of 27 (permalink) Old May 22nd, 20, 12:53 PM
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Re: BBC Production Block/Heads Dyno Test

I'm surprised by the torque of that thing. It is incredible for a 10.2 to 1 small cam'd engine. Excellent work.
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post #14 of 27 (permalink) Old May 22nd, 20, 1:00 PM
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Needs a tunnel ram dammit!!!

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post #15 of 27 (permalink) Old May 22nd, 20, 1:08 PM
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Re: BBC Production Block/Heads Dyno Test

Awesome job Mark!
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