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Old 03-16-2010   #1
tpepmeie
 
Join Date: Aug 2005
Location: Fishers, IN
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Default Camshafts almost done

Thought I would go with the full 360 degree duration on my new cams



just kidding. Here are the semi finished lobes. off to the heat treat furnace now...

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Old 03-16-2010   #2
ZZZZZR1
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Default Re: Camshafts almost done

Wow!


Looks great!!!!!!!!!!
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Old 03-16-2010   #3
Jagdpanzer
 
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Default Re: Camshafts almost done

Looking good!
Which shop is doing the work?
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Old 03-16-2010   #4
Polo-1
 
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Default Re: Camshafts almost done

those look like some mighty BIG lobes

Take full advantage of those heads, it's going to be one BAD 427
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Old 03-16-2010   #5
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Default Re: Camshafts almost done

So what's the full story on the cams?
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Old 03-17-2010   #6
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Default Re: Camshafts almost done

Specs?????


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'91 #1635 PoloGreen 350 LT5
11.09 @ 129.27
11.04 @ 128.86
474RWHP 400RWTQ
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Old 08-04-2010   #7
Topfuel
 
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Default Re: Camshafts almost done

Did you look into valve seat angles on our N/A motors we have found a lot of flow below .050" lift. Right when the valve comes off the seat basically it a a radius grind on the valve and seat.
I was looking into Valve springs for my turbo motor since the boost pushes against the surface area of the valve there by decreasing the effective spring pressure. I looked into behive and liked the natrual harmonic of the spring is very high. Just would have to have custom valve spring retainers made didn't want to go thru that. Isky has springs made for Fiat that will work and have a couple of sets not that it will do you anygood now. Also valve lift would be at coil bind before .5 lift. You can get Ti springs made that is what prostock and Top Alchol motors are now using you can lower spring pressure and use single spring to 10500 rpm. Lower pressure = less paracitic loss in the engine. The cams look fantastic. A lot of work! More flow can be acheaved on valve seat and the pocket area of the port that is where most head porters are now spending a lot of thier time. Again WOW on the cams. my .02 worth
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Old 12-31-2010   #8
tpepmeie
 
Join Date: Aug 2005
Location: Fishers, IN
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Default Re: Camshafts almost done

Degreed the cams yesterday. As everyone says... the first one took about 3 hours, mostly because we couldn't get a reliable measurement on the darn thing. After that, things got faster and we mounted the dial indicator differently.

Ended up making the small adjustments by moving the cams to the right lift at the specified .050 opening point. Took an average of 6 readings (.020, .050, .200, opening side and closing side) to verify the centerline. Got all but one to less than a degree from spec. The LH intake cam is 1 degree retarded. Close enough for me!

Only wasted one $16 bolt on the first one we set. It moved three degrees out when we torqued it.

Dyno session set for week of 17 Jan.

Todd

P.S. Sam, how did your motor turn out?
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Old 12-31-2010   #9
Polo-1
 
Join Date: Sep 2005
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Default Re: Camshafts almost done

you must have all your parts from Greg
Cant wait to hear some dyno #'s.

Hope to have mine in Jim's car this spring and get some final tuning and #'s on it.

those cams are fun to time by yourself
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Old 01-01-2011   #10
Pete
 
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Default Re: Camshafts almost done

Todd,can't wait to hear & see that monster run.

A long wait but well worth it,you'll forget all about the work and money you put in her the first time you hit 7500.

Happy New Year
Pete
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'91 #1635 PoloGreen 350 LT5
11.09 @ 129.27
11.04 @ 128.86
474RWHP 400RWTQ
http://www.youtube.com/watch?v=SFNFOhGGlR4
http://www.youtube.com/watch?v=ZlRIOMwaDYY
https://sites.google.com/site/peteszr1garage
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