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Old 03-02-2009, 06:44 PM
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Any idea of how much power this 327 combo will make???

Just wondering if anyone has a desktop dyno they can guestamate how much HP and TQ my 327 will produce?

.060 327 Chevy
TRW L2165 .060 forged pistons
GM Phase 6 Bowtie aluminum heads 14011049 55cc chambers, 180cc in runner, 2.055" in valve 1.60" ex valves.
Isky part # 201524 camshaft .524 in .534 ex lift, 244* in 248* ex @ .050, 106 LC, 68* overlap.
Holley 650 HP street mechanical carb
1 3/4 in hooker super comp headers
3 in flowmaster exhaust
Mallory comp 9000 dist.
1.5 ratio roller rockers
Need recomendations on an intake. I was thinking Edel. Performer RPM air gap?

2800 LB car, 4.56 rear gear, 26" tall rear tires, Muncie 4 speed trans.

Please help and thanks!!!

Shawn

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Old 03-03-2009, 02:39 PM
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I guess 425hp at 6800 rpm and 400ftlbs at 4400.

I would use the regular RPM intake. The air gap doesn't do well in the cold. Takes a long time to warm up the carb with an air gap when temps drop below 50.

FYI, your engine should have around 10.4:1 cr.

I also think you have too much exhaust and too much gear. 1-5/8 headers and dual 2-1/2 would work better and a 4.11 gear.

should require 25 degrees of initial timing at 1000 rpm idle and 36 degrees total by 3000 rpm.
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Old 03-03-2009, 05:55 PM
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What has been done to the heads ? Do the intake runners actually measure 180 cc ?
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Old 03-03-2009, 09:41 PM
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180cc is the GM spec on the heads. The bowls have been worked, but other than that, nothing. I thought I would have my machinest gasket match them on the intake side.??? Or should I just leave them as is? These heads were designed to be worked over. There is lots of meterial for porting these to well over 200cc's. My little 337 in motor should be good with 180 I would think.
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Old 03-04-2009, 12:19 PM
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Interesting build. Thats a lot of cam for a 3.25" stroke. Should pull real hard in the upper R's though, that is if the carb is big enough to accomodate. @ 7000+ RPMs you will be needing a lot of CFM's. Hope you got a stout bottom end. I would suggest doing whatever you can to improve the flow of the carb and going with an RPM performer. One of those K&N stub stacks would be a good add on for your 327.

Your peak HP will be dictated by the peak RPMs you are able to achieve, that means tuning and a good valve train. I think your RPM goal should be about 7500. Maybe better. Im guessing 400+ HP should be very doable and thats saying something for a short stroke. With that cam your bottom end torque is going to suffer, but it should scream above 2000-2500 r's.

I like it! What is the car?

Are you building this for racing or for the street? If this is a race build you might even entertain the notion of a victor jr intake.

If you havent bought the cam yet then I would suggest a slightly milder solid cam. That would achieve more rpms with less torque loss.

Last edited by 65smallblock; 03-04-2009 at 12:31 PM.
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Old 03-04-2009, 02:54 PM
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This is a street strip car. As far as the cam, I called Isky and Comp Cams. They both recomended about the same tight lash oval track grind. They said that keeping the LC arround 106*, keeping the duration fairly short, (compaired to other grinds of the same lift), and running arround .525 to .535 lift than it would work great on the street! Especially with the 4.56 rear gear and 4 speed trans. Stop light to stop light should be a blast. I went with Isky because I have heard great things about them, and being completely manufactured in the USA is a great point! That cam is supposed to pull from like 2200 to 6200. Move it up a touch in the 337. As far as bottom end, I have personally never seen a stock small Chevy bottom end not be able to take 7 grand all day long. I also have ARP rod bolts, but other than that, just a stock ballanced bottom end. But, I am still open to other suggestions. Thanks
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Old 03-04-2009, 03:00 PM
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[QUOTE=
I like it! What is the car?[/QUOTE]

1964 Chevy Nova II
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Old 03-04-2009, 05:00 PM
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David Vizard had a cylinder head book from 1991 and he tested the phase 6 Bowtie heads in this. He says the area just past the pushrod pinch point has a small cross section and could use some work. I don't know I have not seen a pair of them.
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Old 03-05-2009, 01:00 PM
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i had a 68 camaro with a 327, with the 302 chevy solid lifter cam, and 4.88 gears, and drove it daily! the things we did when we were young!!! i shifted that car at 7000rpm, with the stock crank and rods, with forged trw pistons... car ran 12s with 1.94 doublehumps...lt1 intake and 750 dp holley.
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Old 03-05-2009, 02:47 PM
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Quote:
Originally Posted by roknroy
i had a 68 camaro with a 327, with the 302 chevy solid lifter cam, and 4.88 gears, and drove it daily! the things we did when we were young!!! i shifted that car at 7000rpm, with the stock crank and rods, with forged trw pistons... car ran 12s with 1.94 doublehumps...lt1 intake and 750 dp holley.
Yeah, I bet you never had anything break either. Well, on the bottom end? My machinest builds engines for IMCA roundy rounds. The class they used to run in used 400 inch small block Chevys. They would turn those engines to arround 7200 rpm down the strait aways and he told me they never hurt the bottom end. Now, given the crank was a larger dia crank, but it was also a much longer stroke. I have turned my 350's to 7 g's before and never hurt anything.
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Old 03-06-2009, 04:04 PM
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Dude I love Chevy II's!! Love what your doing with it too.. That spiced up 327 with your combo of lightweight and gears will outrun big blocks, big cubes and GT's all day long..

I still think thats a lot of cam but it should be fun. As you said the gears and manual tranny will make it easy to deal with. Should make a very lopey idle.

The only other advice I would have is to reiterate the imortance of a good valve train and tuning to try to maximize your peak r's. It will help a lot with those low gears in the pumpkin. Im just using some z-28 springs in my 331 to help there a bit. Also if your using a HEI ignition make sure you have a good quality module, no cheap aftermarket garb..

Cool project!
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Old 03-06-2009, 05:17 PM
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Stick with the 3" exhaust.Looks like your motor is gonna like some RPM's so I would look at the victor jr.With that short tire,low gear and a light car,you might run out of motor at the end of the 1/4. BUT the 1/8th is a fun ride!
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Old 03-07-2009, 06:51 PM
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Quote:
Originally Posted by prostreet6t9
Stick with the 3" exhaust.Looks like your motor is gonna like some RPM's so I would look at the victor jr.With that short tire,low gear and a light car,you might run out of motor at the end of the 1/4. BUT the 1/8th is a fun ride!
Yeah, with the 26" tires. I plan to HOPEFULLY one day mini tub or full tub the car and run a much taller and wider tire. So I will hang on to my third member set up of 4.56 ratio. However, for now when I plan on driving it on the highway for any long trip, like my 30 mile one way commute, I think I have a center section with something like 3.70 or equiv. I just need an extra 31 spline spool for that. Other wise, just cruising arround my home town and pulling down on those pesky GT'S, GTO'S, Firehawk TA'S etc... Not to give street racing any kind of thumbs up, but sometimes I can't help an accidentle throttle stabing???
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