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  #21  
Old 03-18-2021, 12:07 PM
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825 HP

Stan
Would be great!

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  #22  
Old 03-18-2021, 12:43 PM
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I'm going to play the "Price is Right" on this one... 1 HP

Looks like a great build... cant wait to see what it does.

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  #23  
Old 03-18-2021, 02:56 PM
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Whats the compression? I would assume its gonna be low for an NA application due to the goal of the blower being added

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  #24  
Old 03-18-2021, 03:24 PM
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Been a long time coming! Way back in April of 2013 I broke my old stock block 462 in half on the street near my home.

What do you think this 380 CFM wide ported, 12.5:1, 535 ci engine should make on gas with the cam listed on the cam card with a 1050 dominator, Victor intake? We are dynoing Friday...


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Originally Posted by Scott Stoneburg View Post
Whats the compression? I would assume its gonna be low for an NA application due to the goal of the blower being added
Scott,
I based my estimate on the 12.5:1 in his post.

Stan

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  #25  
Old 03-18-2021, 03:40 PM
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I hope a little more. My blown up stock block 462 way back in early 2000’s made 716 with standard port e heads. You may be right though but I would be very disappointed.
My first thought was 750 hp... I hope you make more!!

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72 lemans,455 e-head, UD 255/263 solid flat,3.73 gears,,,10" 4400 converter,, 6.68 at 101.8 mph,,1.44 60 ft.2007
(cam 271/278 roller)9"CC.4.11gear 6.41 at 106.32 mph 1.42 60 ft.(2009) SOLD,SOLD
1970 GTO 455 4 speed #matching,, 3.31 posi.Stock manifolds. # 64 heads.A factory mint tuquoise ,69' judge stripe car. 8.64 @ 87.3 mph on slippery street tires.Bad 2.25 60ft.Owned since 86'
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  #26  
Old 03-18-2021, 03:50 PM
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855 horsepower

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  #27  
Old 03-18-2021, 04:12 PM
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Originally Posted by Scott Stoneburg View Post
Whats the compression? I would assume its gonna be low for an NA application due to the goal of the blower being added
12.5:1

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  #28  
Old 03-18-2021, 04:17 PM
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I went down to the machine shop today and we started it. It busted right off and sounded lazy...timing light showed 5 degrees of timing. We have it locked so we bumped it up and it’s no longer lazy...sounds like a complete animal! Let it run 1400-1500 rpm for about 25 minutes and shut it down. Tomorrow morning we go in and re-torque all of the head studs, start it and get it to operating temp and then shut it off to check lash and then we start making pulls.

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  #29  
Old 03-18-2021, 06:31 PM
Scott Roberts Scott Roberts is offline
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A lot of variables that go into a cam selection... basic knowledge calls for more exhaust lift... duration is good in my opinion but lift is shy...you don't want a lot of overlap and spent exhaust getting in the mix...
Again, if your builder has experience with roots blowers, you're good ... he looks att all aspects...
Roots are different than Pro chargers,turbos and nitrous... closest relation will be nitrous..
I look forward to the results... im gonna say 830hp on nuts..

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  #30  
Old 03-18-2021, 06:46 PM
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845hp

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  #31  
Old 03-18-2021, 07:44 PM
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Scott,
I based my estimate on the 12.5:1 in his post.

Stan
I missed that..lol...
My guess is 800 hp. 680 tq.

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  #32  
Old 03-19-2021, 10:49 PM
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A lot of variables that go into a cam selection... basic knowledge calls for more exhaust lift... duration is good in my opinion but lift is shy...you don't want a lot of overlap and spent exhaust getting in the mix...
Again, if your builder has experience with roots blowers, you're good ... he looks att all aspects...
Roots are different than Pro chargers,turbos and nitrous... closest relation will be nitrous..
I look forward to the results... im gonna say 830hp on nuts..

I think you were the closest with Slowbird next in line...837 hp, 755 Torque...dyno kicked our ass today...of note was a super sucker spacer lost 5 foot lbs but tied HP...




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  #33  
Old 03-19-2021, 11:08 PM
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Good job! Nice build

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  #34  
Old 03-19-2021, 11:24 PM
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Very nice! It really liked 40° timing? What fuel was used?

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  #35  
Old 03-19-2021, 11:30 PM
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We tried 38 and it lost a few HP. Plug straps were perfect at 40. We used my Grid ignition and Q16...

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  #36  
Old 03-20-2021, 12:17 AM
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We tried 38 and it lost a few HP. Plug straps were perfect at 40. We used my Grid ignition and Q16...
Didn't realize you were running Q16. You running it in the car like this or blower going on?

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  #37  
Old 03-20-2021, 01:30 AM
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Great numbers!!

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72 lemans,455 e-head, UD 255/263 solid flat,3.73 gears,,,10" 4400 converter,, 6.68 at 101.8 mph,,1.44 60 ft.2007
(cam 271/278 roller)9"CC.4.11gear 6.41 at 106.32 mph 1.42 60 ft.(2009) SOLD,SOLD
1970 GTO 455 4 speed #matching,, 3.31 posi.Stock manifolds. # 64 heads.A factory mint tuquoise ,69' judge stripe car. 8.64 @ 87.3 mph on slippery street tires.Bad 2.25 60ft.Owned since 86'
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  #38  
Old 03-20-2021, 09:22 AM
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Didn't realize you were running Q16. You running it in the car like this or blower going on?
The Q16 is what I run as gas on motor.. When it is blown it will have Alcohol in it...

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  #39  
Old 03-20-2021, 09:58 AM
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Are you changing camshafts before the dyno of the blower?



GTO George

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  #40  
Old 03-20-2021, 10:44 AM
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I was way off... LOL

Good Job! Those are solid numbers!!!

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