Cam Recommendation 427 SBF

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Autopart101
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Cam Recommendation 427 SBF

Post by Autopart101 » Wed Dec 13, 2017 12:46 am

Looking for input on what cam profile to run in my 427. I want to run a SR set up.

4.040 Bore
4.170 Stroke
AFR220 heads flow around @330 @ .700 lift
11-1cr
Super Vic intake
Carb 950DP
1 7/8 LT header
Trans TKO600
3.73 gear

Thanks!

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Re: Cam Recommendation 427 SBF

Post by cstraub » Wed Dec 13, 2017 4:19 pm

What rpm do you want to make peak HP?
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Re: Cam Recommendation 427 SBF

Post by MadBill » Wed Dec 13, 2017 5:02 pm

What kind of driving/racing will you be doing and how do you feel about high lift/high maintenance valve gear vs. many, many worry-free miles?
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Re: Cam Recommendation 427 SBF

Post by Autopart101 » Wed Dec 13, 2017 5:29 pm

cstraub wrote:
Wed Dec 13, 2017 4:19 pm
What rpm do you want to make peak HP?
6,400 6,500

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Re: Cam Recommendation 427 SBF

Post by Autopart101 » Wed Dec 13, 2017 5:33 pm

MadBill wrote:
Wed Dec 13, 2017 5:02 pm
What kind of driving/racing will you be doing and how do you feel about high lift/high maintenance valve gear vs. many, many worry-free miles?
I have a H/R 242-254@.050 .600 lift and a set of OOTB vic Jrs on it now. Go to the track 5-10 times a year. Drive around town less than 1,000 miles a year. The high lift maintenance is not a problem.

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Re: Cam Recommendation 427 SBF

Post by Casper393W » Wed Dec 13, 2017 7:21 pm

What LSA is the cam ground on?

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Re: Cam Recommendation 427 SBF

Post by Autopart101 » Wed Dec 13, 2017 8:07 pm

Casper393W wrote:
Wed Dec 13, 2017 7:21 pm
What LSA is the cam ground on?
It's been 17 years. I think its 112-114.

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Re: Cam Recommendation 427 SBF

Post by mjtorb » Wed Dec 13, 2017 11:03 pm

260-270 at .050 range. keep the lift in the .680-.720 range. had a very simalar set up. ran very well

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Re: Cam Recommendation 427 SBF

Post by CamKing » Thu Dec 14, 2017 10:17 am

Assuming 1.6 rockers

Cam# F351w, R77424-110
260/260 @.050"
.424"/.424" Lobe Lift
110 LSA
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Re: Cam Recommendation 427 SBF

Post by blykins » Thu Dec 14, 2017 10:51 am

You don't need a lot of duration for a 6500 rpm peak.

I have ran this exact combo on the dyno.

I'd be at 254/258 @ .050", 290/294 adv, .672"/.672" on a 1.6 RR, 108 LSA on a 108 ICL.

Billet steel core, standard base circle. Wouldn't be a spring eater, easy on valve train.
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Re: Cam Recommendation 427 SBF

Post by CamKing » Thu Dec 14, 2017 12:08 pm

blykins wrote:
Thu Dec 14, 2017 10:51 am
I'd be at 254/258 @ .050", 290/294 adv, .672"/.672" on a 1.6 RR, 108 LSA on a 108 ICL.
If that 290/294 is at .020", that's basically just an under-area'd version of what I recommended, but on a 108.
My recommendation is 292/292 @.020".
He wouldn't be giving up any torque, would make more HP, and it's easy on the valvetrain.
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Re: Cam Recommendation 427 SBF

Post by blykins » Thu Dec 14, 2017 12:32 pm

CamKing wrote:
Thu Dec 14, 2017 12:08 pm
blykins wrote:
Thu Dec 14, 2017 10:51 am
I'd be at 254/258 @ .050", 290/294 adv, .672"/.672" on a 1.6 RR, 108 LSA on a 108 ICL.
...would make more HP....
Maybe. Maybe not.
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Re: Cam Recommendation 427 SBF

Post by CamKing » Thu Dec 14, 2017 2:26 pm

blykins wrote:
Thu Dec 14, 2017 12:32 pm
Maybe. Maybe not.
You're about 20,000 dyno pulls short of being able to make that assumption.

There's no "Maybe" about it. My recommendation would put 20hp over that lazy cam you recommended.
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Re: Cam Recommendation 427 SBF

Post by blykins » Thu Dec 14, 2017 3:13 pm

Hey, let’s all just be jerks today.

For one thing, you don’t know how many dyno pulls I have made.

The second thing is that I’m getting real sick and tired of “cam grinders” thinking that just because they come up with it it’s the best thing in the world. I’ll be the first to tell you that theory doesn’t always equal reality.

So I take it from your response that you’ve dynod an engine exactly like the OP has, with your recommendation and then a cam exactly like I recommended as well? Because that should be the only reason why you should come on here and show your ego like you did.

Maybe we should each grind it and send it to him. The only way you learn is to try stuff back to back. Way too often do people just buy one camshaft and are totally happy with it, not realizing that there is actually something out there much better.

I am confident in what I posted, but there is no way that I’m stupid enough to think that every cam I spec is the absolute best choice for a customer, or foolish enough to belittle someone else’s experience level over a discussion.
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Re: Cam Recommendation 427 SBF

Post by CamKing » Thu Dec 14, 2017 3:59 pm

Wow, someone if feeling a little big for their britches today.
Settle down. You don't have 1/100th of the knowledge or experience I have. It's not even debatable.
Your overwhelming arrogance is why I stopped trying to help you a few years ago. You're just too smart to listen.
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