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434 SBC Camshaft
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DRR Pro
posted
We are reconfiguring our current N/A 434sbc for a ProCharger. I made 2 calls this past week for cam recommendations. Both recommendations were close together, but in my opinion both were way to large on duration.

1st one: 283/287 @.050, .700/.675 lift, 114.5* installed 4* advanced.

2nd one: 279/285 @.050, .725/.675 lift, 114* installed 4* advanced.

I'm not looking to set the world on fire with this motor. I want 900-1000 hp @ the flywheel, hopefully closer to 900. IMO, both cams have to much duration. Also, I thought there would be more split in intake/exhaust duration by at least 8*. I think the lift needs to be a tad over .700 lift, both Intake/exhaust peak @ .700. The 114* lobe center seems correct, but not understanding the 4* advance; maybe because the cams have large durations.

Heck I don't know, but I know I'm not going to run that much duration. I'm actually thinking about getting a computer dyno simulation program, anyone used one of these?


1980 Camaro
Taking the Best Working Small Tire Shyt Box & making it Greater Than Before!
3000 lbs.
Pump Gas 436
 
Posts: 2463 | Location: NV. | Registered: October 20, 2006Reply With QuoteReport This Post
DRR Top Comp
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quote:
Originally posted by B KING:
We are reconfiguring our current N/A 434sbc for a ProCharger. I made 2 calls this past week for cam recommendations. Both recommendations were close together, but in my opinion both were way to large on duration.

1st one: 283/287 @.050, .700/.675 lift, 114.5* installed 4* advanced.

2nd one: 279/285 @.050, .725/.675 lift, 114* installed 4* advanced.

I'm not looking to set the world on fire with this motor. I want 900-1000 hp @ the flywheel, hopefully closer to 900. IMO, both cams have to much duration. Also, I thought there would be more split in intake/exhaust duration by at least 8*. I think the lift needs to be a tad over .700 lift, both Intake/exhaust peak @ .700. The 114* lobe center seems correct, but not understanding the 4* advance; maybe because the cams have large durations.

Heck I don't know, but I know I'm not going to run that much duration. I'm actually thinking about getting a computer dyno simulation program, anyone used one of these?


I like the second, it's pretty much same cam I run in my n/a 23 427 sbc, only a wider LSA for less overlap. Advance 4 to get the exhaust open earlier, standard issue. I'm gonna guess that's a Bullet camshaft. Looks perfect for what you're doing sir.
 
Posts: 9398 | Location: Madeira Beach Fl. | Registered: June 12, 2018Reply With QuoteReport This Post
DRR Pro
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The second cam is similar to our other 434 sbc cam; 278/288 @ .050, .728/.728 lift with a 109* lobe separation. I don't like it & it's a pig down low, as it should be. I guess with a 114* L/S with 4* advance would make it more tolerable.

The cam above does make peak hp where I want it @6,600 vs. 6,000 with our current 434 sbc being reconfigured for the ProCharger.

I've been doing a lot of research on these centrifugal supercharger builds. Most builds trying to set the world on fire for max power, go with cams in the general area in the OP for a sbc. I will get it figured out one way or another. Wink


1980 Camaro
Taking the Best Working Small Tire Shyt Box & making it Greater Than Before!
3000 lbs.
Pump Gas 436
 
Posts: 2463 | Location: NV. | Registered: October 20, 2006Reply With QuoteReport This Post
DRR Sportsman
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From my experience with a BBC at a pretty wide variety of boost/power levels, the cam is not that important (assuming it's in the right zip code).

Either go with what Bullet recommends or call Scott @ PAR and buy one from him.
 
Posts: 671 | Location: New Jersey | Registered: April 26, 2001Reply With QuoteReport This Post
DRR Sportsman
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Have made 1500HP on 23 * SBC with F2 414cu-in 9.6cr.cam is 20 degrees smaller than Cam Help recommendations listed.Bill C.


Checkered Flag Machine and Ceralli Competition Engines
checkeredflagmachine.net/
Racing engines and induction development
 
Posts: 110 | Location: Paterson N.J. | Registered: September 21, 2006Reply With QuoteReport This Post
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Originally posted by BIG SPEED:
Have made 1500HP on 23 * SBC with F2 414cu-in 9.6cr.cam is 20 degrees smaller than Cam Help recommendations listed.Bill C.


All Pro RR cylinder head?
 
Posts: 9398 | Location: Madeira Beach Fl. | Registered: June 12, 2018Reply With QuoteReport This Post
DRR Sportsman
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Edelbrock Pro-Port 365 cfms.SV2 manifold EFI.Iron Eagle block 55mm cam,.937 lifters.cam is 255-270-115.


Checkered Flag Machine and Ceralli Competition Engines
checkeredflagmachine.net/
Racing engines and induction development
 
Posts: 110 | Location: Paterson N.J. | Registered: September 21, 2006Reply With QuoteReport This Post



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Nice! That's the skull & cross bone Nova engine. I like that car! Hot Rod!
 
Posts: 9398 | Location: Madeira Beach Fl. | Registered: June 12, 2018Reply With QuoteReport This Post
DRR Pro
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Thanks for the inputs!

I got a 3rd opinion yesterday & he thought the cams were close on the call.


1980 Camaro
Taking the Best Working Small Tire Shyt Box & making it Greater Than Before!
3000 lbs.
Pump Gas 436
 
Posts: 2463 | Location: NV. | Registered: October 20, 2006Reply With QuoteReport This Post
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quote:
Originally posted by B KING:
Thanks for the inputs!

I got a 3rd opinion yesterday & he thought the cams were close on the call.


It's because of the weak (relatively speaking) cylinder head you have in play.
 
Posts: 9398 | Location: Madeira Beach Fl. | Registered: June 12, 2018Reply With QuoteReport This Post
DRR Pro
posted Hide Post
quote:
Originally posted by BIG SPEED:
Have made 1500HP on 23 * SBC with F2 414cu-in 9.6cr.cam is 20 degrees smaller than Cam Help recommendations listed.Bill C.


quote:
Originally posted by BIG SPEED:
Edelbrock Pro-Port 365 cfms.SV2 manifold EFI.Iron Eagle block 55mm cam,.937 lifters.cam is 255-270-115.


Like said in OP, not looking to set the world on fire with 900-1000 hp. I have no where near the head you used. We are using Brodix 18 spx heads that are supposed to flow 325 @.700 & will use a blow thru carb on E85.

I thought about trying the existing cam, but I'm sure the 108 lobe separation is not in the "right zip code".

I appreciate your information provided.


1980 Camaro
Taking the Best Working Small Tire Shyt Box & making it Greater Than Before!
3000 lbs.
Pump Gas 436
 
Posts: 2463 | Location: NV. | Registered: October 20, 2006Reply With QuoteReport This Post
DRR Pro
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quote:
Originally posted by Mike Rietow:
quote:
Originally posted by B KING:
Thanks for the inputs!

I got a 3rd opinion yesterday & he thought the cams were close on the call.


It's because of the weak (relatively speaking) cylinder head you have in play.


You beat me, I just kind of posted that after. LOL!


1980 Camaro
Taking the Best Working Small Tire Shyt Box & making it Greater Than Before!
3000 lbs.
Pump Gas 436
 
Posts: 2463 | Location: NV. | Registered: October 20, 2006Reply With QuoteReport This Post
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posted Hide Post
quote:
Originally posted by B KING:
quote:
Originally posted by Mike Rietow:
quote:
Originally posted by B KING:
Thanks for the inputs!

I got a 3rd opinion yesterday & he thought the cams were close on the call.


It's because of the weak (relatively speaking) cylinder head you have in play.


You beat me, I just kind of posted that after. LOL!


Kirk at Bullet is pretty damn slick, he played a role in my relatively speaking weak out of the box 23 Brodix cylinder head, dipping in the 5's n/a 3200 lbs. They took a few days to come up with it. Them guys are old school, no china junk at that place. I'd roll with their suggestion if I were you, from experience.
 
Posts: 9398 | Location: Madeira Beach Fl. | Registered: June 12, 2018Reply With QuoteReport This Post
DRR Sportsman
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quote:
Originally posted by Mike Rietow:


Nice! That's the skull & cross bone Nova engine. I like that car! Hot Rod!
Yes.7.87et at 3525# 22# boost.


Checkered Flag Machine and Ceralli Competition Engines
checkeredflagmachine.net/
Racing engines and induction development
 
Posts: 110 | Location: Paterson N.J. | Registered: September 21, 2006Reply With QuoteReport This Post



DRR Top Comp
posted Hide Post
quote:
Originally posted by BIG SPEED:
quote:
Originally posted by Mike Rietow:


Nice! That's the skull & cross bone Nova engine. I like that car! Hot Rod!
Yes.7.87et at 3525# 22# boost.


Bad dude!! Lot of satisfaction at the ticket shack!! Well done!
 
Posts: 9398 | Location: Madeira Beach Fl. | Registered: June 12, 2018Reply With QuoteReport This Post
DRR Pro
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quote:
Originally posted by BIG SPEED:
Yes.7.87et at 3525# 22# boost.


I always enjoy reading about your builds, sharing of the set-ups & on track performance.

As for our goals, we are looking for mid 8s @ 2950 lbs. with 14-15 lbs. boost. This combo will hopefully work for bracket racing, we'll find out.


1980 Camaro
Taking the Best Working Small Tire Shyt Box & making it Greater Than Before!
3000 lbs.
Pump Gas 436
 
Posts: 2463 | Location: NV. | Registered: October 20, 2006Reply With QuoteReport This Post
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