Cam Recommendation 427 SBF

General engine tech -- Drag Racing to Circle Track

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blykins
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Location: Louisville, KY

Re: Cam Recommendation 427 SBF

Post by blykins » Thu Dec 14, 2017 4:18 pm

No sir, I'm not feeling big for my britches. I certainly didn't come in here shooting off both barrels, aiming at everyone else's experience levels. Remember, you're the one that singled my post out. I didn't take a shot at yours.

So my overwhelming arrogance is why you stopped helping me years ago? Did you forget that you sold me a camshaft this year? :lol:

Does this look like I have overwhelming arrogance to anyone else out there?

************************************************************************

From: Brent Lykins <brent@lykinsmotorsports.com>
To: jonescams@bellsouth.net
Sent: Tuesday, May 30, 2017 11:23 AM
Subject: Need recommendation and price.....

Mike, hope you're staying busy and doing well.

I have a 434 inch Clevor that I built for a drag race customer. He
doesn't have the car sorted out entirely yet but has already made plans
to spray for next year and wants to get parts here for when it comes
back for a freshen-up this fall.

Current camshaft is a custom Comp piece, 261/273 @ .050", 112 LSA on a
110, .471"/.471" lobe lift, running 1.8 T&D race rockers.

On the dyno here, it made 777 hp @ 7000, 630 lb-ft @ 5500.

*4.155 x 4.000, with a 6" rod
*55mm on all 5 journals, roller cam bearings
*.904" lifter bores
*Heads are CHI 3V heads, about 245cc intake port volume. 2.250"
intake/1.710" exhaust.
*Intake flow is: 212 @ .300, 276 @ .400, 320 @ .500, 347 @ .600, 373 @
.700, 384 @ .800, 391 @ .900
*Exhaust flow is: 160 @ .300, 199 @ .400, 225 @ .500, 245 @ .600, 256 @
.700, 265 @ .800, 275 @ .900
*Compression ratio is 13.5:1
*Intake is a CHI 3V 225 cc intake, ported, with a 2" Super Sucker 4150
to 4500 adapter, with a 1100 cfm Dominator
*It is a vacuum pump motor
*Running a Powerglide with a 1.58 1st gear and a 5500 stall.
*Vehicle weighs 3000 lbs with driver ('69 Mustang)
*Running VP C12 fuel
*Headers are 2.125" diameter
*Running 1.550 Manley Nextek springs, 300 seat with 800 open.

Here's what we are going to change and what we'll need another camshaft for:

*Going from 13.5:1 to 14.5:1
*Adding 400 hp worth of spray
*Changing intake from current to a CHI 3V intake, ported, but with a
4500 flange. No adapter spacer.

I bought an additional camshaft last year when I built the engine to try
on the dyno, but with it making almost 780 hp, we decided to not try
it. His previous engine was a 575 hp 408C and with an all new
chassis/suspension, we weren't looking to optimize the combo. The cam
I have on the shelf is a custom with Comp HXL lobes, 272/280 @ .050",
with .800" gross lift, on a 108 LSA.

Thanks for your help.

********************************************************


Go take your Geritol, drink a Mt. Dew and calm down.
Last edited by blykins on Thu Dec 14, 2017 4:24 pm, edited 1 time in total.
Lykins Motorsports
brent@lykinsmotorsports.com
www.lykinsmotorsports.com

Autopart101
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Joined: Sat Nov 04, 2017 9:35 pm

Re: Cam Recommendation 427 SBF

Post by Autopart101 » Thu Dec 14, 2017 7:31 pm

blykins wrote:
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.
What was the dyno results on that combo?

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