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Re: .528 purple shaft street-able?
[Re: GTXbound]
#1385342
02/11/13 11:49 PM
02/11/13 11:49 PM
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Joined: May 2003
Posts: 6,561
Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,561
Downtown Roebuck Ont
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Quote:
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 ????
I'd rethink the 6pak rods if it's not too late.
Kevin
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Re: .528 purple shaft street-able?
[Re: domingo]
#1385343
02/12/13 12:02 AM
02/12/13 12:02 AM
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Joined: Jan 2003
Posts: 30,998
Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 30,998
Oregon
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Quote:
Andy,
Did you try thr .557 too thru the manifolds? How did it compare to the ,528???
The .557 wouldn't work well with manifolds so I never even bothered to try it.
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Re: .528 purple shaft street-able?
[Re: Jeremiah]
#1385344
02/12/13 12:04 AM
02/12/13 12:04 AM
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Joined: Jan 2003
Posts: 30,998
Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 30,998
Oregon
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Quote:
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.
Yes,a hyd roller does add a lot of money. If the budget is tight that is one of the first places to save money. For a street engine you won't see much difference.
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Re: .528 purple shaft street-able?
[Re: Twostick]
#1385347
02/12/13 01:38 AM
02/12/13 01:38 AM
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Joined: Nov 2008
Posts: 106
NY VA USA
GTXbound
OP
member
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OP
member
Joined: Nov 2008
Posts: 106
NY VA USA
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Quote:
Quote:
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 ????
I'd rethink the 6pak rods if it's not too late.
Kevin
Too late the rotating assembly was balanced long ago and just sitting on the shelf....
How bad can the 6 pack rods be beside the weight?
It is realy just a street car with hopefully 500++HP ...lol
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Re: .528 purple shaft street-able?
[Re: GTXbound]
#1385349
02/12/13 09:25 AM
02/12/13 09:25 AM
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Joined: Apr 2012
Posts: 59
Florida
Sweet5ltr
member
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member
Joined: Apr 2012
Posts: 59
Florida
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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
I use nearly the same combination (RPM heads, Victor intake, 4.10 gears, 4-speed, etc). Except, I run the .590 solid from Mopar, widely stated by Mopar to be completely un-streetable. I run the camshaft EVERY DAY on the street, and it is aggressive, but no where near un-streetable. .528 would be a kitten, I would either go with the .557 or .590 at a MINIMUM if you want to build serious power and have a ridiculous idle sound to match..
1969 Plymouth Road Runner (440 w/ Boost! RIP) now a low-deck 470 with hotchkis suspension, nascar boom tube exhaust, & big brakes.
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Re: .528 purple shaft street-able?
[Re: carter]
#1385353
02/12/13 01:20 PM
02/12/13 01:20 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
I planning to run the MPīs 0.528 in my 440.I have Eddy RPM`s heads... Can somone recommend a valve spring for this setup?
Tnx
The springs that come on the E-heads will be fine.
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Re: .528 purple shaft street-able?
[Re: GTXbound]
#1385354
02/12/13 01:26 PM
02/12/13 01:26 PM
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Joined: Jan 2003
Posts: 74,978
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,978
U.S.S.A.
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Quote:
How bad can the 6 pack rods be beside the weight?
It is realy just a street car with hopefully 500++HP ...lol
the rods are heavy , the mistake mopar made was not upping the bolt size to 7/16 for the LY 3/8 . Just make sure they have a GOOD set of bolts in them , ARP Wavelocks ...
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Re: .528 purple shaft street-able?
[Re: Sweet5ltr]
#1385355
02/12/13 01:49 PM
02/12/13 01:49 PM
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Joined: Jan 2003
Posts: 4,046
Minnesota
72blubird
master
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master
Joined: Jan 2003
Posts: 4,046
Minnesota
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The .528 seems to be a very strong cam. I guess my thought was running a four speed like you I could go with a bit more cam. Not sure if I left something or not, but it seems strong and it has a great sound at idle. I am also running it through manifolds Will have to wait until this summer to get it at the track for the first time and see how it performs. The one I chose was an off the shelf comp cams extreme energy hydraulic flat tappet. Rpm range 2,500-6,200/Advertised Duration .285 int .297 ex/Dur @.050; .241 in .247 ex/ Lift .545 in. 545 ex with 1.5 rockers. Lobe Separation Angle 110.
You are getting good advice from experts I am not one. Just thought I would offer my choice on a mostly street driven car that is a blast to drive.
What was I thinking....
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Re: .528 purple shaft street-able?
[Re: fullmetaljacket]
#1385358
02/12/13 11:51 PM
02/12/13 11:51 PM
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Joined: Apr 2004
Posts: 329
Frederick, MD
moparguy1967
enthusiast
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enthusiast
Joined: Apr 2004
Posts: 329
Frederick, MD
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http://www.youtube.com/watch?v=n5NweB9PyhUJust a little video of my car with the 284/528 solid cam. My 446 was built by Andy Jensen. It has forged flat top piston, scat H-beam rods, and forged crank. The compression ratio is just over 10 to 1. The heads are 906 cut for larger SS valves and the bowls are blended. Its topped off with a RPM Performer intake and Pro Systems 4150 carb. The cam was installed straight up, but Andy did tighten up the lash. He dyno'd the engine with headers and it made 520 HP and 560 lbs torque. I picked this cam because of an article I had read a few years back and it made good power for a street car. I run HP manifolds, not header in my car, so Im sure I loss a little power. Hope this helps. http://www.youtube.com/watch?v=OOIgewNRCxkdyno pull
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Re: .528 purple shaft street-able?
[Re: Mr.Yuck]
#1385359
02/13/13 01:05 PM
02/13/13 01:05 PM
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Joined: Oct 2006
Posts: 89
sweden
carter
member
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member
Joined: Oct 2006
Posts: 89
sweden
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Quote:
Quote:
I planning to run the MPīs 0.528 in my 440.I have Eddy RPM`s heads... Can somone recommend a valve spring for this setup?
Tnx
The springs that come on the E-heads will be fine.
Mr.Yuck
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Re: .528 purple shaft street-able?
[Re: AndyF]
#1385360
02/13/13 04:35 PM
02/13/13 04:35 PM
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Joined: Jan 2003
Posts: 16,923
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,923
NC
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Quote:
The .528 works great with HP manifolds.
If you are going to run factory cast iron exhaust manifolds, then the 0.528" is a good choice. If you are running headers with the heads, CR, etc. of that engine... then I would move up to the MP 0.557" or something similar.
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