.528 purple shaft street-able?
#1385322
02/11/13 12:21 AM
02/11/13 12:21 AM
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Joined: Nov 2008
Posts: 106 NY VA USA
GTXbound
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Hey Guys Just wanted some advice on the .528 purple shaft would you guys run it straight up or advance it 4 degrees ? Projected spec's looking for 500+ HP comp 10:25 need's to live on pump gas. Edelbrock aluminum RPM's 82cc Edelbrock rpm intake gasket matched Its going in a 4 speed 70 Dart . Rear is 4:10's currently but i have a pumkin with 3:91's and 28 X 10.5 tire Thanks
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Re: .528 purple shaft street-able?
[Re: GTXbound]
#1385323
02/11/13 12:32 AM
02/11/13 12:32 AM
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Joined: Feb 2003
Posts: 6,849
fullmetaljacket
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Re: .528 purple shaft street-able?
[Re: Thumperdart]
#1385332
02/11/13 01:55 PM
02/11/13 01:55 PM
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Joined: Dec 2008
Posts: 290 Norwalk Ohio
cudasteve68
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enthusiast
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Norwalk Ohio
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Quote:
Quote:
Hey Guys
Just wanted some advice on the .528 purple shaft
would you guys run it straight up or advance it 4 degrees ?
Projected spec's looking for 500+ HP
comp 10:25 need's to live on pump gas.
Edelbrock aluminum RPM's 82cc
Edelbrock rpm intake gasket matched
Its going in a 4 speed 70 Dart .
Rear is 4:10's currently but i have a pumkin with 3:91's and 28 X 10.5 tire
Thanks
Why not, my .680-.660 solid roller w/275-280 dur. @ .050 has been driven to hell and back for years and is plenty streetable. I`ve been "over camming" for years and I just keep going faster.............enjoy.
I ran a 528 in my '71 drove it almost everyday during the summer to work. 3:91 & 4:10 gears on a 14 tire. 904 & 3800 stall. Car ran 12.0's That 528 has lumpy at all. Perfect for a "sleeper"
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Re: .528 purple shaft street-able?
[Re: Jeremiah]
#1385336
02/11/13 07:07 PM
02/11/13 07:07 PM
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Joined: Nov 2008
Posts: 106 NY VA USA
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I guess i'll get this motor ready to go as follows zero decked block 2355 pitons & 6 pack rods .040 cometic head gaskets Edelbrock RPM's milled to 78cc & gasket matched Compression works out to about 10.6 .528 Purple shaft 4 degrees advance it the ptv checks out. But i got another question ....... How will advancing the cam 4 degrees affect the compression (now is 10.6) for pump gas on the street ????
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Re: .528 purple shaft street-able?
[Re: GTXbound]
#1385337
02/11/13 07:49 PM
02/11/13 07:49 PM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
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Its a very good cam and works well for what it is. But I had a buddy who was unhappy with it because he said it idled and sounded to smooth ! He wanted somthing much lumpier. But I told him who cares how wicked it sounds it made great power for his combo. Ron
Last edited by 383man; 02/11/13 07:50 PM.
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Re: .528 purple shaft street-able?
[Re: Jeremiah]
#1385338
02/11/13 09:24 PM
02/11/13 09:24 PM
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Joined: Jan 2003
Posts: 31,002 Oregon
AndyF
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Quote:
Refresh my memory - did you try any roller cams in that engine? I am slowly working on a 511 low deck that will have manifolds so this thread has my attention.
I did a bunch of dyno testing with other flat tappet cams. Mostly solid flat tappet but also a hyd flat tappet. A couple of years later I did another stroker motor which was slightly bigger and with better heads. I used a hyd roller in the second motor but it didn't really make a lot more power than the .528 flat tappet.
The FAST guys have spent a lot more time and money on this subject than me. I'm sure that Dwayne could find a cam that would make more power than the .528 these days and it would probably be a roller cam.
Back when I did my testing I worked with a couple of different cam mfgs and they sent me their best designs. So it wasn't like I was just picking cams out of the catalog and testing them. I ran exactly what the engineers told me to run and nothing worked better than the .528 cam.
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Re: .528 purple shaft street-able?
[Re: GTXbound]
#1385339
02/11/13 09:30 PM
02/11/13 09:30 PM
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Joined: Jan 2003
Posts: 6,531 Jacksonville, FL
Chris2581
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It's a very good cam.I really wish I hadn't sold the one I had years ago.Anyway,we ran it in a very mild 440,9.0 compression,452 heads,and the usual bolt ons.Didn't even degree it in and it ran 11.60's all day in the 71 Demon I have now.
Nautilus Racing- We use Superformance gaskets and Turbo Action converters/products.
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Re: .528 purple shaft street-able?
[Re: AndyF]
#1385340
02/11/13 11:02 PM
02/11/13 11:02 PM
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Joined: Mar 2003
Posts: 9,099 Rogue River, OR
Jeremiah
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Quote:
Quote:
Refresh my memory - did you try any roller cams in that engine? I am slowly working on a 511 low deck that will have manifolds so this thread has my attention.
I did a bunch of dyno testing with other flat tappet cams. Mostly solid flat tappet but also a hyd flat tappet. A couple of years later I did another stroker motor which was slightly bigger and with better heads. I used a hyd roller in the second motor but it didn't really make a lot more power than the .528 flat tappet.
The FAST guys have spent a lot more time and money on this subject than me. I'm sure that Dwayne could find a cam that would make more power than the .528 these days and it would probably be a roller cam.
Back when I did my testing I worked with a couple of different cam mfgs and they sent me their best designs. So it wasn't like I was just picking cams out of the catalog and testing them. I ran exactly what the engineers told me to run and nothing worked better than the .528 cam.
Very good info. Thank you Andy. I am looking for a low maintenance combination that will idle like a stocker with the A/C on. It sounds like the .528 could be a very good place to save a little coin too. Adding a hydraulic roller adds a significant amount to the budget once you price out lifters, a roller cam that can drive a mechanical fuel pump, etc.
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