cam help ?? your recommendation - Team Camaro Tech
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post #1 of 9 (permalink) Old May 11th, 15, 08:19 PM Thread Starter
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mike
 
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cam help ?? your recommendation

im thinking of doing a cam swap i need your thoughts

355 sbc
pro filers 195cc
compression 11.1 quench .037
tko 600
373 rear
air gap 750dp
the cam i have in there now is comp cams magnum 292hyd [email protected] 501 lift
i know if i go solid i will make power. but i don't want to change spring so i want to stay hyd . this is the cam i was looking at.

http://www.lunatipower.com/Product.aspx?id=1986&gid=287
or if you guys have something in mind
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post #2 of 9 (permalink) Old May 12th, 15, 07:06 AM
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Dave
 
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Re: cam help ?? your recommendation

I noticed that you picked the most powerful hydraulic cam ever designed! Surfing the bottom of the page in a cam catalog will get you the most radical cam. This yields a radical cam, that will not be street friendly.

The Lunati cam catalog states that they (I believe it was designed by UD Harold) was "Designed for Very Hot street/bracket race applications" This cam requires a minimum of 10.5:1 compression, 4.11 gearing and a 3,500 RPM stall converter!. Do you have a 3,500 RPM stall converter now?

Cam Specifications according to the cam card are:
Duration at 0.050" of Valve lift (Int/Exh): 241/249
Gross Valve Lift at the Valve with a 1.5:1 Rocker (Int/Exh): 0.525"/0.546"
LSA: 110
ICL: 106
RPM Range: 2500-6600

You are going in the right direction with this cam, in that it has more valve lift. You want to maximize the cam lift, and minimize the duration, and to widen the LSA for a street driven cam to obtain a good cam. If you want a race car for your trailer you want a solid roller that will spin your 355 up to a 8,600 RPM shift point, a 5,400 RPM torque converter launching off your trans brake, and 5.38 rear gears. You also need to pump up the compression. In any case your quench is on the tight side so be very, very carful of valve to piston interference at 10 before TDC.

Big Dave
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post #3 of 9 (permalink) Old May 12th, 15, 07:49 AM
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Darin
 
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Re: cam help ?? your recommendation

I had that same magnum 292 in my 355in. chevelle, it ran pretty good, and sounded pretty damn good too.

The hyd roller cam I just got for my 421" build has just about the same specs as that lunati cam you specd.
duration @.50" 241/ 247
Lift .545/ .565
lobe 110
center line 106

That lunati should be pretty nasty in a 355.

1968 Butternut Coupe,
421" Dart SHP block
TKO 600 RR
Dutchman 9" w/3.70 US Gear Lightning r&p
Speedtech torque arm,Ridetech HQ coilovers
Global West arms
Budnik wheels

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post #4 of 9 (permalink) Old May 13th, 15, 03:53 AM
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Steve
 
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Re: cam help ?? your recommendation

Mike, personally I`d call Chris Straub and get this done right for `your` car

Cheers
Steve

Steve
69' SS/RS X11 PRO-TOURING E-FORCE LS7, DSE Sub, T56 MAG, Recaro, Wilwood disc, Racepak IQ3S, SpeedTech TA/JRI CO's, Pro-Venom 250s, Forgeline CV3C 20/19 - SOLD
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post #5 of 9 (permalink) Old May 13th, 15, 06:46 AM
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Chris
 
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Re: cam help ?? your recommendation

You've got heads to make peak power at 7200 rpm. You won't need much cam in this engine to make gobs of power. Give the engine cylinder head, you take away camshaft. If your looking to make power to around 6200-6400 then all you will need is:

150-3102K

SBC 350 to 360 CID AFR 180 to 190 Head Max Power 6000-6200 rpm Peak Torque 3800. This cam takes advantage of the AFR’s Intake to Exhaust flow ratio. This cam maximizes the power of these heads creating a forever long band of power. To extend power another 200 rpm use 1.6 ratio on both intake and exhaust. 1 5/8” headers are needed to for this application.

Lift .510/.492
Adv 280/282
.050” 221/223
Lobe Sep 108

Chris

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post #6 of 9 (permalink) Old May 13th, 15, 05:46 PM
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Mark
 
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Re: cam help ?? your recommendation

Quote:
Originally Posted by $Mike70Z-28 View Post
i know if i go solid i will make power.
Not necessarily. Read up about solid vs hydraulic, you'll be surprised.

I have this hyd roller cam in my 70 Z28.

Lunati Cam 20120121
Advertised Duration (Intake/Exhaust) 278/288
•Duration @.050" (Intake/Exhaust) 232/242
•Gross Valve Lift (Intake/Exhaust) .507"/.507"
•Lobe Separation 112
•Intake Center Line 108
•RPM Range 2000-6400

Using a B28 vacuum can with a home made limiter plate.

Mark 70 Z28 M22 3.73 Z21 Z87 - Lunati 20120121 Roller Cam

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post #7 of 9 (permalink) Old May 13th, 15, 10:25 PM Thread Starter
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mike
 
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Re: cam help ?? your recommendation

Chris the cam you posted is that a hyd flat tappet or hyd roller
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post #8 of 9 (permalink) Old May 14th, 15, 12:26 AM
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Doug
 
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Re: cam help ?? your recommendation

I pretty sure for the price of $699 that is a hyd. roller cam and not a retro-fit roller cam. If you decide to go with the Lunati camshaft make sure your springs are up for the job. These are the springs that Lunati recommends. http://www.summitracing.com/parts/lun-73100k2 Here is what Comp Cams recommend for the magnum Camshaft. http://www.summitracing.com/parts/cca-986-16
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post #9 of 9 (permalink) Old May 14th, 15, 07:50 AM
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Chris
 
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Re: cam help ?? your recommendation

Quote:
Originally Posted by $Mike70Z-28 View Post
Chris the cam you posted is that a hyd flat tappet or hyd roller
That is a retro fit hyd roller cam with Morel tie bar retro fit lifters.

Chris

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