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10.5:1 compression 18 Degree 427 Small Block Chevrolet Solid Roller Camshaft 7800 rpm's

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Ripper/Wrench

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Discussion starter · #1 · (Edited)
I picked up a raised cam Motown block which takes a BBC cam core, disregard the small base circle.

We're gonna put this engine in the Third Gen Camaro to run it through its paces 1/8 mile, hopefully before the third week in May. When slow conditions hit in Florida.

If you were gonna make a educated guess, what will the Third Gen Camaro run at 3150 lbs w/driver, 18 degree (3.875 x 4.185) 10.5:1 pump gas 427 sbc 1/8 mile n/a, with Straub / Mayhem max ported heads, with this Lunati custom solid roller camshaft, Scat counterweight crank, Scat H beam rods?

I've got a handful of torque converters and gear ratio's to cross at 7800 rpm's. Probably shift 7200-7400 rpm.

If you have a better idea for a camshaft in the 70's for overlap, post its specifications. I'm considering all true hot street car camshaft options Lunati or Bullet Cams.

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#2 ·
I would expect it to run 10.0 or quicker in the 1/4.
 
owns 1969 Chevrolet El Camino SS396
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#3 ·
Steve69SS396 said:
I would expect it to run 10.0 or quicker in the 1/4.
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the pump gas 421 test engine is runnng 6.30s in the 1/8 in a 1970 Nova, so it should be Sub 10's in the 1/4' mile.
 
Discussion starter · #5 · (Edited)
WHT/73 said:
7800 in the 1/8?
The cam was custom for the new head package or it's from another combo ?
Click to expand...
It's a Lunati hot street car camshaft designed for this combo, the events are nearly identical to that of the camshaft I run in the 10.1 compression 18cc piston high rpm 496's I do . The engine with this camshaft will run nice and clean in traffic, 76 degrees overlap, and rolling down highway. It's a true 10.5:1 compression pump gas street car camshaft, so to speak.

The lift specifications are fairly close to camshaft I run in the 23 degree sbc 427 I run in my nova. For contrast, that camshaft is a Bullet camshaft, with 99 degrees overlap 277 284 @ .050 107 lobe sep, 14.5:1 compression engine.

Good street manners are high on the priority list.

5.29 gear 10x28 tire, with a converter I have in mind on the shelf here, it'll cross 7700-7800 with the converter slipping 13%, if the engine has steam.
 
#6 ·
Ripper/Wrench said:
It's a Lunati hot street car camshaft designed for this combo, the events are nearly identical to that of the camshaft I run in the 10.1 compression 18cc piston high rpm 496's I do . The engine with this camshaft will run nice and clean in traffic, 76 degrees overlap, and rolling down highway. It's a true 10.5:1 compression pump gas street car camshaft, so to speak.

The lift specifications are fairly close to camshaft I run in the 23 degree sbc 427 I run in my nova. For contrast, that camshaft is a Bullet camshaft, with 99 degrees overlap 277 284 @ .050 107 lobe sep, 14.5:1 compression engine.

Good street manners are high on the priority list.

5.29 gear 10x28 tire, with a converter I have in mind on the shelf here, it'll cross 7700-7800 with the converter slipping 13%, if the engine has steam.
Click to expand...
Similar to the rv cam in my 427SBC, its 274/286 @ 0.050" with 112LSA and 704" lift.
 
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#8 ·
Ripper/Wrench said:
It's a Lunati hot street car camshaft designed for this combo, the events are nearly identical to that of the camshaft I run in the 10.1 compression 18cc piston high rpm 496's I do . The engine with this camshaft will run nice and clean in traffic, 76 degrees overlap, and rolling down highway. It's a true 10.5:1 compression pump gas street car camshaft, so to speak.

The lift specifications are fairly close to camshaft I run in the 23 degree sbc 427 I run in my nova. For contrast, that camshaft is a Bullet camshaft, with 99 degrees overlap 277 284 @ .050 107 lobe sep, 14.5:1 compression engine.

Good street manners are high on the priority list.

5.29 gear 10x28 tire, with a converter I have in mind on the shelf here, it'll cross 7700-7800 with the converter slipping 13%, if the engine has steam.
Click to expand...
Ok so that’s a yes to the 1/8 mile rpm with a 5.30 gear?
Cam is “similar” to mine also for my 441.
lil more LSA tho.
 
#10 ·
Rooted deeply in the Hotrodders DNA is to make more power then somebody else for less money. For this reason these 18 Degree heads and intake were born. Bang for the buck it gives the SBC guy huge power on a budget. If you were to price the parts for an equal 23 Degree head, it gets out of many peoples budgets. Our basic kit starts at 650HP and goes to 800HP . To get that kind of power potential out of a a 23 degree head your looking at:

AFR 245 Heads $3600
Shaft Rockers $2100
LIfters $650
Intake $420
Head Studs $240
3/8's pushrods $180
Gaskets (Head, Intake, Header, Valve cover ) $200 -/+ a few $$'s
Camshaft $600
Pistons and Rings (Dome) $850
Total of $8840

Saving a $2000+ buys ignition, carb, water pump....
 
#16 ·
Sir is your name mike. I don't really see the need for this kit for a pumpgas 700 horsepower small block. Been a bunch of 406 thst are almost there. But yes is if one is starting from scratch it make sense. Just i can see switching a whole combo over to this.

My guy john here in canada know of a bunch of stuff and there old normal pu.pgas 406 were mid to hi like 650 plus 20 yesr ago with steel heads. He told me that Jeremy and the NY boys at Extreme did a complete carb to pan, 421 pump gas that made 780 horsepower for under 8000 us dollars but back in 2017 with nascar sb2 take offs. The engine was biult for a guy named butch from detroit and his early 60s impala cruser. This guy is know for fast small blocks like his 23 degree motor at 2800 pounds on a 10.5 tire and went 8.20s. Or his small block mustand that went 4.70 in the 1/8 i have been told.

You should go on yellow bullet with your builds and challenges.

RH
 
#19 ·
RickyHill said:
Sir is your name mike. I don't really see the need for this kit for a pumpgas 700 horsepower small block. Been a bunch of 406 thst are almost there. But yes is if one is starting from scratch it make sense. Just i can see switching a whole combo over to this.

My guy john here in canada know of a bunch of stuff and there old normal pu.pgas 406 were mid to hi like 650 plus 20 yesr ago with steel heads. He told me that Jeremy and the NY boys at Extreme did a complete carb to pan, 421 pump gas that made 780 horsepower for under 8000 us dollars but back in 2017 with nascar sb2 take offs. The engine was biult for a guy named butch from detroit and his early 60s impala cruser. This guy is know for fast small blocks like his 23 degree motor at 2800 pounds on a 10.5 tire and went 8.20s. Or his small block mustand that went 4.70 in the 1/8 i have been told.

You should go on yellow bullet with your builds and challenges.

RH
Click to expand...
Honestly "Rippers" brought a lot of entertainment to this forum, he builds his own stuff, he dyno tests it, he races it, he's "hand on" and just because I bust his balls don't mean I don't respect what he does, because really he's just one of us, a little delusional but still one of us. This forum been better since he's been on here, I like his builds and challenges myself. Carry on "Ripper"
 
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