So one of my goals has been to make 900hp with a std runner true 23º SBC. We accomplished it on Cobbs Racing Stuska last week. It was a group effort and it's a beast! It was for sure a max effort build!


900.8 hp / 648 tq
Peak HP = 8000 RPM
1.038 correction
Dart Iron Eagle Block
.391 Raised Cam
60mm babbit bearings
4.223 bore
4.125 stroke
Lunati Pro Series Crank
Dyers 6.125 rod
.866 DLC coated pins
Custom ROSS PISTONS
Line 2 Line Coatings
.9mm, .9mm, 2.00mm Total Seal Piston Rings
Trend Performance Products 7/16 - .165 wall pushrods
Charlie's Custom Oil Pan
Mellings Billet Shark Tooth Oil Pump
ATI BALANCER
JESEL .904 Tie Bar Lifters
JESEL BELT DRIVE
COMP CAMS 60mm Cam
23 deg Profiler Heads by Speier Racing Heads
2.180/1.570 3.05in² MIN- 3.18in² AVG CSA
Hulk23 intake port matched AS-CAST
Star Machine Vacuum Pump
Custom 2 Circuit Holley Gen III DOMINATOR by Cobb Racing Enterprises
MSD Crank Trigger, Wires and distributor.
Driven XP2 Oil
VP Q16 Fuel

Chad, when is he going to put it in the Nova? That is quite an accomplishment for you, Cobb and everyone involved.

quote:

Originally posted by CURTIS REED:
Chad, when is he going to put it in the Nova? That is quite an accomplishment for you, Cobb and everyone involved.

They are getting the engine tomorrow so this weekend it will be in. And Thanks!

Impressive! Do you know what the carb rated flow #’s are?

That's pretty cool. Congrats

1.95HP per CI NA out of 23 degree. very impressive work.

quote:

Originally posted by markemark:
Impressive! Do you know what the carb rated flow #’s are?

I will find out.

Another question. Is the (in HG) vac reading correct? At -21 is this sustainable? Thought pumps were regulated much lower than this…. but I don’t use one, just evac, curious.

quote:

Originally posted by markemark:
Another question. Is the (in HG) vac reading correct? At -21 is this sustainable? Thought pumps were regulated much lower than this…. but I don’t use one, just evac, curious.

Yes it's correct.

quote:

Originally posted by markemark:
Another question. Is the (in HG) vac reading correct? At -21 is this sustainable? Thought pumps were regulated much lower than this…. but I don’t use one, just evac, curious.

My SB2 was pulling 22-23 on the dyno, I have dropped it down some since. For Drag racing probably would not hurt it short runs but that may not be good on NASCAR or other motors that run 500 miles like that?
A vacuum pump can help ring seal and general seal of your motor while helping pull moisture out of motor.

900 Hp out of a 23* Standard runner head is impressive for sure. What was the RPM on that?

quote:

Originally posted by Curly1:

quote:

Originally posted by markemark:
Another question. Is the (in HG) vac reading correct? At -21 is this sustainable? Thought pumps were regulated much lower than this…. but I don’t use one, just evac, curious.

My SB2 was pulling 22-23 on the dyno, I have dropped it down some since. For Drag racing probably would not hurt it short runs but that may not be good on NASCAR or other motors that run 500 miles like that?
A vacuum pump can help ring seal and general seal of your motor while helping pull moisture out of motor.

900 Hp out of a 23* Standard runner head is impressive for sure. What was the RPM on that?

Made peak HP at 8000.

How much head/manifold do you need for a 462 to peak at 8000? A LOT!

quote:

Originally posted by SpeierRacingHeads:


Made peak HP at 8000.

How much head/manifold do you need for a 462 to peak at 8000? A LOT!

That is very nice. A lot of big blocks with more cubic inches do not make that much. Care to give a little more information on cam?

quote:

Originally posted by markemark:
Impressive! Do you know what the carb rated flow #’s are?

1350 cfm
2.350 blade
2.020 venturi
Holley Gen III DOMINATOR
Converted to 2 circuit

quote:

Originally posted by Curly1:

quote:

Originally posted by SpeierRacingHeads:


Made peak HP at 8000.

How much head/manifold do you need for a 462 to peak at 8000? A LOT!

That is very nice. A lot of big blocks with more cubic inches do not make that much. Care to give a little more information on cam?

I do not know the cam specs, that was designed by Chris. Just know it had lots of lift in it.

Would be crazy for Chris to give out cam specs but I bet becoming a customer would get you one.

quote:

Originally posted by CURTIS REED:
Would be crazy for Chris to give out cam specs but I bet becoming a customer would get you one.

I talked to Steve last night and Chris thinks there is 20 in the manifold. So being the type of guy he is, pulled it off to be ported. Going back on the dyno. Stay tuned!

quote:

Originally posted by SpeierRacingHeads:

quote:

Originally posted by CURTIS REED:
Would be crazy for Chris to give out cam specs but I bet becoming a customer would get you one.

I talked to Steve last night and Chris thinks there is 20 in the manifold. So being the type of guy he is, pulled it off to be ported. Going back on the dyno. Stay tuned!

20 would be huge to pick up from that manifold. From what I saw on them, they're pretty good to start with.

What size header? Very impressive

quote:

Originally posted by DANGERBOY:
What size header? Very impressive

2-2 1/8 w/3.50 out collector