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  #16 (permalink)  
Old 08-26-2010, 02:48 PM
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engineczar-II..thanks & more

yeah...sorry. it is a 454 +.060, SRP 141636, -14 dome pistons,
396291's w/2.19/1.88, Isky #396284/294 hyd roller
Weiand dual plane, 800cfm carb, MSD hi-po HEI no extras, 1-3/4"
headers with 3" exhaust all the way back, super T-10 w/2.64 1st gear,
3:31's out back, all in a 65 Chevelle. My best calc depending on how far in
the hole my SRP's are is 9.6cr
thanks again for your continued knowledge

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  #17 (permalink)  
Old 08-27-2010, 08:06 AM
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Looking at that setup I wouldn't change your cam. You're right in the ballpark. It's a solid 500hp/550ftlb combo and should have a nice flat torque curve which will work well with the gears you're running and a relatively heavy car.
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  #18 (permalink)  
Old 08-27-2010, 01:54 PM
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Scroll down here to Tech Tip 2003 from Iskenderian...
http://www.iskycams.com/techtips.php
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Old 08-27-2010, 02:15 PM
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techinspector1..Thanks..more please

Hi
Thanks a ton..I always want to know more and the more I learn
the more I think I didn't know.
Am I hearing that this cam choice may not be the best for my app?
with regards to the dual pattern? I want a hyd roller and for BBC there aren't
too many options for the street pounder. I was going to go with the Isky
396650 solid roller. My buddy ran the desk top dyno on it and it was lower
results than this 396284/294. Man...I am at a loss now. I want it to perform
like a skalded cat and sound as nasty as it goes. More important is performance than sound though..the rupity rump is just a by product
thanks again tech1
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Old 08-27-2010, 02:25 PM
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Quote:
Originally Posted by Fastest65
Am I hearing that this cam choice may not be the best for my app?
Which one? The 396284/294 looks like a pretty good match. The 396650 has too much duration for 9.6 cr engine and the 108 lc makes it a bit peakier.
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Old 08-27-2010, 02:31 PM
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engineczar-II..thanks & more cam

I am going the 396284/294 route. Desk top dyno came up with
539/565. The 396650 didn't fair well at all..too big. Based on the
Techinspector1 input though the single pattern is better than the dual pattern
due to my 3" exhaust. and the longer dur on the exh lift not needed.
Rhode Island wow...I live in RI through the 80's E. Greenwich, Warwick, Pawtucket
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Old 08-27-2010, 02:36 PM
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I would still stay dual pattern, your 1-3/4" primary tube headers are small for that head and that size engine. 1-7/8" would be a lot better, or even 2".
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Old 08-27-2010, 02:49 PM
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Dual Pattern Cam Answers-Thanks All

My engine is not going to be that radical 540hp
565tq I just found out today since I have to get
the decks resurfaced, not decked to speak of just
resurface maybe .010-.015 off. But still will bump me up
from 539hp to roughly 550hp and 575tq. I though I needed
some back pressure in the exh system that is why I went 1-3/4
then 3" instead of the Hooker Super Comp 2" I have then to 3"
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  #24 (permalink)  
Old 08-27-2010, 03:04 PM
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Needing backpressure is an old wives tale. Why do you think everyone runs open headers at the track or on the dyno, all an exhaust system does is quiet things down and choke things up, and some people work very hard to try and ensure the exhaust system is a free flowing as possible so as to not lose any power if possible.
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Old 08-27-2010, 03:19 PM
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ericnova72 cam/exh stuff

Ah, yes you are correct un-corked headers..da!
So your thinking the 396284/294 is still a great choice for
this bbc combo?
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Old 08-27-2010, 03:21 PM
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Seems like it fits the bill quite well.
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