WHAT CAM SHOULD I USE? - Team Camaro Tech
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post #1 of 23 (permalink) Old Jan 9th, 05, 06:17 PM Thread Starter
 
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IM BUILDING A 67 327 ENGINE.IT HAS STANDARD BORE I MIGHT HAVE THE GO 30 OVER.FLAT TOP PISTONS.BRODIX ALUMINIUM STREET HEADS 2.02 1.60 VALVE SIZE.PERFORMER INTAKE.I NEED TO KNOW A GOOD CAM GRINGD FOR THIS COMBO.I WANT AS MUCH HORSE POWER AS I CAN GET.ALSO THE ROCKERS ARE ROLLER TIP.ALSO WHAT SIZE CARB ?

THANKS
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post #2 of 23 (permalink) Old Jan 10th, 05, 06:34 AM
 
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I've said in many times AND you might leave a schosh a power on the table BUT no more then a good old CC 268HE or Crane/Cam Dynamics 272/272 Energizer AND the little motor will do great, imho..

OR use a small solid lifter cam that matches thease spec's and good valve springs and rpm her as high as you have nerve to!!

No more then the great "old-school" stock, -097, Little Duntov solid cam or a moderm aftermarket version of it will really turn it on!!

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post #3 of 23 (permalink) Old Jan 10th, 05, 10:37 AM
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Assuming you're talking street usage - I like the GM 327 350HP cam.

For the carb, seems like lots-o-folks tend to over-carb for the street and mileage and driveability suffer. A 650 or 700 carb usually works well on the street.

Just my humble opinion, your mileage (literally) may vary.

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post #4 of 23 (permalink) Old Jan 10th, 05, 03:58 PM Thread Starter
 
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thanks for the reply guys.
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post #5 of 23 (permalink) Old Jan 10th, 05, 04:11 PM
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Can always go with my combo.. would be bout the same as what your thinking.

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post #6 of 23 (permalink) Old Jan 10th, 05, 04:20 PM Thread Starter
 
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WHAT KIND OF HORSEPOWER ARE YOU GETING OUT OF YOURS?
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post #7 of 23 (permalink) Old Jan 10th, 05, 06:59 PM
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Dyno 2000 says 399 hp @ 6k rpm, 399 tq @ 4500 rpm, but think it may be a bit low as the program is a bit dated.

[ 01-10-2005, 09:09 PM: Message edited by: Nantooch ]

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post #8 of 23 (permalink) Old Jan 10th, 05, 07:09 PM
 
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And the great old, 350hp/327 cam is fine, BUT, imho, only in a true 11 to 1 CR., 327 motor like it was made for when used in the old L-79 motor application!!

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post #9 of 23 (permalink) Old Jan 10th, 05, 10:40 PM
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The old 350hp/327 cam needs 11 to 1 CR or static compression is to low and then you loose your low RPM torque. That's because it has a big duration and lots of over lap and it bleeds off compression at low RPM, but they will rev real well. Myself I would go with a more modern cam like the comp Cams Extreme Energy series. Or if you have the bucks the 268 Roller thar pdq67 posted I think you'll be happier.

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post #10 of 23 (permalink) Old Jan 11th, 05, 03:41 AM Thread Starter
 
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Thanks for all the replies.
todd
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post #11 of 23 (permalink) Old Jan 11th, 05, 05:43 AM
 
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Jack,

Thanks for the vote of confidence but I have ta say I'm not a roller cam guy.

To me, a hy-roller costs too much and is almost, but not always, top-end limited rpm-wise due to the heavier lifters AND the solid rollers scare me b/c they just don't last a long time when driven on the street like I like to drive my cars..

Like I said, no more then one of those cams and even CC's 270 Magnum, Crane's 274H06 and Isky's 270 Mega cam will turn the little beast on for hy-cams! BUT I really am partial to the solid cams b/c you can wrap the little motor as high as you have nerve with good valve springs AND that's where the little, shorter stroked motors really come alive, imho..

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post #12 of 23 (permalink) Old Jan 11th, 05, 06:41 AM
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67RSRAG, What static compression ratio are you looking at (i.e. what cc heads, what type of flat tops)? You may want to look at the XE series or advance the cam to get the DCR up. I used to have a 327 in a '60 vette and was running an XE274 but my static compression was up higher than it sounds like your's will be. In my case the XE274 wasn't enough cam for the motor to run on 92 octane. I had to bump up to around 93.5 to get it to run correctly. You really need to do some calcs on static and dynamic compression to optimize the cam selection.
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post #13 of 23 (permalink) Old Jan 11th, 05, 06:46 AM
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One other point if you're going to have to change the pistons you may want to reconsider flat tops in order to get the static compression up. Just my 2 cents.
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post #14 of 23 (permalink) Old Jan 11th, 05, 06:50 AM
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for what it's worth, after tossing it around with the guys here, I've pretty much decided to go with the comp magnum 270 solid on my 327, will also mill the dart's .040 to get ~10:1 comp.





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post #15 of 23 (permalink) Old Jan 11th, 05, 08:09 AM
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With that combo your DCR comes in at around 8.17:1 which is a little low for aluminum heads. If you could get up around 10.25 on static compression you'd do a little better. 10.5 starts putting you over the 8.5:1 (with that cam) which is desireable for aluminum heads. What head gaskets are you planning on running and what quench are you targeting (ideally .040)?
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