Who's got the H.P. calculator? - Team Camaro Tech
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post #1 of 7 (permalink) Old Nov 12th, 19, 09:17 PM Thread Starter
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Question Who's got the H.P. calculator?

Just wanted some opinions I guess on my combo here. And if anyone has a H.P. calculator that would be cool. So, here's what I ended up with.
427 cu.
454 block .30 over
steel 427 crank ( same as a 396 crank)
G.M. rods
speed pro pistons, closed chamber
9.8:1 compression
Bullet racing cam, part no. 502000 Hyd. roller
Dur. at .50 intake 230. Exhaust 240.
lobe lift intake & exhaust .3533
Lobe separation 110, degreed to 106
Duration at .006, Intake 284 exhaust 295
Gross valve lift .601 intake & exhaust
Bullet roller lifters
Cloyes double roller timing chain
Closed chamber iron oval port heads, 2.19 intake 1.88 exhaust. Heads ported and polished
Wieand single 4 BBl tunnel ram
Demon 850 mechanical secondaries, 50cc primary pump, 30cc secondary pump, squirters are 31's
Mallory unilite dist.
Dougs headers, 1 1/2" primary tubes, 3" collector
electric fans
3000 stall converter
TH-400

67 RS 327, 4-speed, posi, done.
67 Modified, 454, TH-400, posi, under construction.
67 SS 396, 4-speed, basket case.
72 RS, sitting, partially done.
55 210 post, 2 door, 327 4-speed runs good.
55 2 door post, gasser project
69 Cadillac ElDorado
69 4x4 suburban
59 ElCamino

Some mornings, it's just not worth chewing thru the leather straps"

Last edited by stevo camaro; Nov 13th, 19 at 05:38 PM.
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post #2 of 7 (permalink) Old Nov 14th, 19, 05:51 PM Thread Starter
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Re: Who's got the H.P. calculator?

Allrighty then. Guess there aren't any takers. LOL

67 RS 327, 4-speed, posi, done.
67 Modified, 454, TH-400, posi, under construction.
67 SS 396, 4-speed, basket case.
72 RS, sitting, partially done.
55 210 post, 2 door, 327 4-speed runs good.
55 2 door post, gasser project
69 Cadillac ElDorado
69 4x4 suburban
59 ElCamino

Some mornings, it's just not worth chewing thru the leather straps"
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post #3 of 7 (permalink) Old Nov 15th, 19, 07:23 AM
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Re: Who's got the H.P. calculator?

Try Wallace Racing.

Wallace Racing - Automotive Calculators

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post #4 of 7 (permalink) Old Nov 15th, 19, 09:22 AM
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post #5 of 7 (permalink) Old Nov 15th, 19, 03:43 PM
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Re: Who's got the H.P. calculator?

Quote:
Originally Posted by stevo camaro View Post
Just wanted some opinions I guess on my combo here. And if anyone has a H.P. calculator that would be cool. So, here's what I ended up with.
427 cu.
454 block .30 over
steel 427 crank ( same as a 396 crank)
G.M. rods
speed pro pistons, closed chamber
9.8:1 compression
Bullet racing cam, part no. 502000 Hyd. roller
Dur. at .50 intake 230. Exhaust 240.
lobe lift intake & exhaust .3533
Lobe separation 110, degreed to 106
Duration at .006, Intake 284 exhaust 295
Gross valve lift .601 intake & exhaust
Bullet roller lifters
Cloyes double roller timing chain
Closed chamber iron oval port heads, 2.19 intake 1.88 exhaust. Heads ported and polished
Wieand single 4 BBl tunnel ram
Demon 850 mechanical secondaries, 50cc primary pump, 30cc secondary pump, squirters are 31's
Mallory unilite dist.
Dougs headers, 1 1/2" primary tubes, 3" collector
electric fans
3000 stall converter
TH-400
I see some stuff that don't make sense to me...


427 cu.
454 block .30 over..... .030 over 454 isn't a 427 (427 .030 over is 439 and a 454 .030 over is 460)


1 1/2" primary tubes, 3" collector......1 1/2" primaries....on a BBC ????

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1.54 60'--6.95 @ 98.45 660'--10.96 @ 121.53
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post #6 of 7 (permalink) Old Nov 16th, 19, 05:27 AM
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Re: Who's got the H.P. calculator?

Quote:
Originally Posted by stevo camaro View Post
Just wanted some opinions I guess on my combo here. And if anyone has a H.P. calculator that would be cool. So, here's what I ended up with.
427 cu.
454 block .30 over
steel 427 crank ( same as a 396 crank)
G.M. rods
speed pro pistons, closed chamber
9.8:1 compression
Bullet racing cam, part no. 502000 Hyd. roller
Dur. at .50 intake 230. Exhaust 240.
lobe lift intake & exhaust .3533
Lobe separation 110, degreed to 106
Duration at .006, Intake 284 exhaust 295
Gross valve lift .601 intake & exhaust
Bullet roller lifters
Cloyes double roller timing chain
Closed chamber iron oval port heads, 2.19 intake 1.88 exhaust. Heads ported and polished
Wieand single 4 BBl tunnel ram
Demon 850 mechanical secondaries, 50cc primary pump, 30cc secondary pump, squirters are 31's
Mallory unilite dist.
Dougs headers, 1 1/2" primary tubes, 3" collector
electric fans
3000 stall converter
TH-400
For a 433 cu in engine, I would guess 475 hp with that cam. The closed chamber heads will hurt it a small amount.

A 750 carb would probably help it down low and not hurt the top end.

I think your header specs are a misprint. Probably 1-3/4" X 3" collector

68 Camaro convertible, 6.0 LQ4 with LS3 heads, Vintage Air, 750 street demon carb, eddy perf rpm, GM hot cam, Hooker headers, 4L80e, 12 bolt, 3.55 gears
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post #7 of 7 (permalink) Old Nov 18th, 19, 07:47 AM Thread Starter
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Re: Who's got the H.P. calculator?

Correct Beth That was a misprint. The headers are 1-3/4"
Okay Doug, it's a 439. LOL
I was thinking it was between 450 and 500 H.P..
Just wondering what others thought.

67 RS 327, 4-speed, posi, done.
67 Modified, 454, TH-400, posi, under construction.
67 SS 396, 4-speed, basket case.
72 RS, sitting, partially done.
55 210 post, 2 door, 327 4-speed runs good.
55 2 door post, gasser project
69 Cadillac ElDorado
69 4x4 suburban
59 ElCamino

Some mornings, it's just not worth chewing thru the leather straps"
stevo camaro is offline  
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