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  #16 (permalink)  
Old 01-16-2007, 02:09 PM
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For your vehicle and intended use, I would suggest at least a 383.

If you were running the full 1/4, then you could get away with a streetable 327 and still command some respectable times.

Since you are going to run the 1/8th you will need a lot of off-the-line torque to get that mass moving quickly, which neither the 327 or the 302 is best suited for. Not that it can't be done, but you had better be prepared to spend high dollars if you truly wish to go that route.

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  #17 (permalink)  
Old 01-16-2007, 02:11 PM
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327

I seen these Corvette that sold on the speed channel it had a 327 with 300 H.P.
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  #18 (permalink)  
Old 01-16-2007, 02:15 PM
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First off,
If you are going to make an rpm engine, things get exponentially more expensive above 6800 rpm.

Second, an auto trans will not stand rpms above 7000 very long (unless it is a race powerglide). You will be exploding parts. The drum spins about 2.5 times as fast as the engine rpm.

Third, everything about the car must be adjusted to the high rpm useage. It will take GEAR to get it moving and keep it in the power band.

Fourth, it will suck on the street below 4000 rpm.

You can make 700 hp with a normally aspirated 327 but it takes 9600+ rpm to do it. That ain't fun with 4" pistons, and gasoline (it burns too slowly).
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  #19 (permalink)  
Old 01-16-2007, 02:15 PM
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Quote:
Originally Posted by GMCTRUCKS
I seen these Corvette that sold on the speed channel it had a 327 with 300 H.P.
300 flywheel hp isn't going to cut it for a 3200 lb brick in the 1/8th...
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  #20 (permalink)  
Old 01-16-2007, 02:20 PM
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Quote:
Originally Posted by xntrik

Fourth, it will suck on the street below 4000 rpm.

You can make 700 hp with a normally aspirated 327 but it takes 9600+ rpm to do it. That ain't fun with 4" pistons, and gasoline (it burns too slowly).
Bingo. My 327 idles at appx. 1700 r's and sucks to drive at anything under about 3500 rpm.

Makes great power and sounds great when cruising at 25 mph in first gear...that is until the trans went south on me.
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Old 01-16-2007, 05:30 PM
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327

id go ahead and build the 327. Have it bored to a 331. I had a 331 in a full interior 79 camaro and ran low 12's to mid 11's with a average turbo 350 trans. no big stall converter. no big rear end . I had it dynoed at 458 horses at 5500 rpms. Which is not bad for a 327.... all it had was some 194 camelbacks. a victor jr intake. And a holley 750 dp carb. heck id go with a 327 before id go with anything else
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  #22 (permalink)  
Old 01-16-2007, 05:33 PM
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Quote:
Originally Posted by fast79malibu
id go ahead and build the 327. Have it bored to a 331. I had a 331 in a full interior 79 camaro and ran low 12's to mid 11's with a average turbo 350 trans. no big stall converter. no big rear end . I had it dynoed at 458 horses at 5500 rpms. Which is not bad for a 327.... all it had was some 194 camelbacks. a victor jr intake. And a holley 750 dp carb. heck id go with a 327 before id go with anything else
Dyno slip? Time slips please...

I know exactly what it takes to get that kind of power out of a 327 and it ain't gonna happen with 194 camelbacks. They will not support the airflow that is necessary.
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  #23 (permalink)  
Old 01-16-2007, 05:35 PM
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No disrespect sir but a relatively stock 331 ?? with a few bolt ons making 458 hp ????? I'd love to see the dyno sheet. Edit....I see Lonestar and I were a little skeptical at about the same time
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  #24 (permalink)  
Old 01-16-2007, 05:39 PM
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Quote:
Originally Posted by 327NUT
No disrespect sir but a relatively stock 331 ?? with a few bolt ons making 458 hp ????? I'd love to see the dyno sheet. Edit....I see Lonestar and I were a little skeptical at about the same time
If you look at your keypad you will notice that 4, 5 and 8 are situated in such a way that they are easy to type in at random...
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  #25 (permalink)  
Old 01-16-2007, 05:46 PM
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Quote:
Originally Posted by fast79malibu
id go ahead and build the 327. Have it bored to a 331. I had a 331 in a full interior 79 camaro and ran low 12's to mid 11's with a average turbo 350 trans. no big stall converter. no big rear end . I had it dynoed at 458 horses at 5500 rpms. Which is not bad for a 327.... all it had was some 194 camelbacks. a victor jr intake. And a holley 750 dp carb. heck id go with a 327 before id go with anything else
I know that I am in a bit of a cynical mood, but this statement deserves dissection if only for the benefit of the original topic starter...

Full interior '79 Camaro...what is that, 3500 lbs?

Average TH-350...I think that would probably hold up to 450 hp and 11 second passes for a long, long time

No stall...gee, let's leave the line at a paltry 1500 rpm's with a high rpm engine

No big rear end...and it survives 11 second passes

194 camelbacks...450 horse? In the same sentence nonetheless

At least he got the C.I. and carb size right...
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  #26 (permalink)  
Old 01-16-2007, 05:52 PM
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I am skeptical too. 458 hp from 331 cubes is 138 %. That takes very good airflow..... maaaaaaaybe possible with excellent porting job on those heads.... AND 7700 rpm...... if my calculations are correct. ouch. That takes a heck of a valve train, and it won't idle worth doodelly.

Some things make funny noises,....... suddenly, unexpectedly, and usually spectacularly !!!!!


added:
4000 stall, 4.88-5.13 gears, perfect traction, 3700 driver and gas/ pounds at the tree, 458 flywheel hp x efficiency, 69* at 600 ft density altitude, no wind...... plug it in a 1/4 mile calculator..... you will be suprised.

Last edited by xntrik; 01-16-2007 at 06:03 PM.
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  #27 (permalink)  
Old 01-16-2007, 05:57 PM
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Quote:
Originally Posted by xntrik
I am skeptical too. 458 hp from 331 cubes is 138 %. That takes very good airflow..... maaaaaaaybe possible with excellent porting job on those heads.... AND 7700 rpm...... if my calculations are correct. ouch. That takes a heck of a valve train, and it won't idle worth doodelly.

Some things make funny noises,....... suddenly, unexpectedly, and usually spectacularly !!!!!
Yep...I make a bit more power than Mr. Malibu claims and my optimum shift point is at 7800 r's. Of course I have a bit better head than a 194...
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  #28 (permalink)  
Old 01-16-2007, 06:03 PM
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327

ok so what do you guys suggest I should do with one of these engines lets say to get about 500 horse from it, or should I just look at a big block ?
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  #29 (permalink)  
Old 01-16-2007, 06:06 PM
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Quote:
Originally Posted by fullthrottle
ok so what do you guys suggest I should do with one of these engines lets say to get about 500 horse from it, or should I just look at a big block ?
If you have a "large" journal, 4" bore block then build a 383...it will suffice as long as you add the proper drivetrain components.

If you have a small journal, 4" bore block then build your 327 but do not expect it to perform well in the 1/8th. It would be a fun engine in your truck for you to play with until you can build a bigger engine.

Personally, I love the 327, but as far as performance they need to be in there own environment.
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  #30 (permalink)  
Old 01-16-2007, 06:10 PM
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Here ya go guys......

http://www.nationaldrivetrain.com/calcs/dragcalc.html

3700 lb actual weight
458 hp at flywheel
5.5 gear needed to run 7700 in the lights
runs 11.2 @ 116.7 in quarter
7.18 in the eighth

ARE YOU SUPRISED ???????



If he is a little lighter
If he has less hp
If he has less gear
*************************
Still could run 11.8s

with
3700 pounds
380 horsepower flywheel
7100 through the lights
28 inch tire
5.39 gear
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