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SoCa06Z 05-08-2012 03:26 PM

327 Help & Recommendations
 
3 Attachment(s)
Hey Guys-

New to the site, and recently purchased a 1964 Chevy II. I am really enjoying the car, but I'm in need of more power. Below is the current combo from what I know from the previous owners, but I'd like your opinion on whether to try to build the 327, or sell it complete and build a 350/383? The current combo is smooth, starts up first shot, idles great, etc, but lacks any top end power.

Current Combo:

1965 block (327)
unsure of compression
Vortec Heads
Comp 268 Cam (lift is only 477/480 I believe)
E-Brock Performer Intake
E-brock 650 Carb
Petronix Flame Thrower Distributor
Bowtie Stage 2 700r4 with 2200 stall and 373 gears out back

I am looking for an honest 400hp at the motor, so do I attempt to do this with the 327, or scrap it and build something else? The motor is solid (-10k miles on it), but just doesn't have enough power for me. Thoughts on possible combos are appreciated.

SoCa06Z 05-08-2012 03:30 PM

I have been looking at this kit BTW Top End Kit , in case I end up keeping the 327. Do you think this is a good setup for a 327, or do I need more cubes to really take advantage of it? The goal of the car is a weekend cruiser with enough guts to get out of it's own way, and play with the occasional car next to me at the light.

eloc431962 05-08-2012 03:46 PM

I would leave the 327 in it if it was me, but i like to be different sometimes. :cool:



Cole
:pimp:

ap72 05-08-2012 04:00 PM

Do you care if it is a little rough at idle? throwing in a healthy solid cam, angle milling the heads 1 degree and cleaning up the bowls and VJ, and running some good headers can get you there. the next upgrade would be the intake and carb.

If you want a very steady idle and great torque with your 400hp then putting a 383 short block under your current top end will do it.

A third option (one that I'm sort of toying with in my spare time) is an LT1 engine with a cam swap. But you'll be running EFI, which is a huge plus to me while others hate it. It may be the cheapest route though.

SoCa06Z 05-08-2012 04:12 PM

Quote:

Originally Posted by ap72
Do you care if it is a little rough at idle? throwing in a healthy solid cam, angle milling the heads 1 degree and cleaning up the bowls and VJ, and running some good headers can get you there. the next upgrade would be the intake and carb.

If you want a very steady idle and great torque with your 400hp then putting a 383 short block under your current top end will do it.

A third option (one that I'm sort of toying with in my spare time) is an LT1 engine with a cam swap. But you'll be running EFI, which is a huge plus to me while others hate it. It may be the cheapest route though.

Great info...I guess I'm just curious if the 327 is a good enough base to start with? I have owned several cars, but this is my first step into the classic/carb world. My current other weekend car is a C6 Z06, so I have a bunch to learn about carbed motors.

What is your opinion on the Edelbrock top end kit that I mentioned above? Would this work well with the 327 bottom end? I am ok with a lumpy idle, as this is just a weekend cruiser.

eloc431962 05-08-2012 04:16 PM

Quote:

Originally Posted by SoCa06Z
Great info... My current other weekend car is a C6 Z06, I am ok with a lumpy idle, as this is just a weekend cruiser.

There is nothing wrong with what you already have you are just use to the power of the Z06. :sweat: :D :cool:



Cole
:pimp:

SoCa06Z 05-08-2012 04:54 PM

Quote:

Originally Posted by eloc431962
There is nothing wrong with what you already have you are just use to the power of the Z06. :sweat: :D :cool:



Cole
:pimp:

I took this into consideration too, but it definitely feels like the car should perform better than it does. I'm not looking for a rocket ship, just something that I'm not intimidated when I pull up next to these kids in their imports =).

SoCa06Z 05-14-2012 08:55 PM

Well, in an attempt to figure out why this thing was falling on it's face I decided to pull a valve cover to run the casting numbers. Problem solved....what were thought to be Vortec heads are actually old swirl port heads that aren't worth a damn past 4k RPM.

So now what do I do? The Edelbrock RPM kit is still an option, but I'd prob go with a Lunati Voodoo cam. I have also been looking at the patriot performance line of heads. Anyone have any experience with them, good or bad? Here is what I was looking at...http://www.summitracing.com/parts/PAR-2169/

I was thinking maybe those heads, RPM intake, lunati voodoo cam, topped with 650 carb and some decent long tube headers. http://www.lunatipower.com/Product.aspx?id=2325&gid=297

Any opinions or facts about the Patriot heads are much appreciated.

cool rockin daddy 05-14-2012 09:58 PM

Edelbrock heads cast here in USA and machined in USA. They flat out make good power when all is said and done.

Patriot heads, cast overseas and machined in USA Choice is easy for me.

454C10 05-14-2012 11:47 PM

I would swap the heads first and see how it runs.

The compcam 268H is a decent cam and will work well with your near stock converter. If you go up in cam size, then the converter stall will need to be increased.

Should be able to make power up to 5500-6000 with a 268H cam in a 327 with a good set of heads. Maybe not 400hp, but close enough.

I would bet those twirl port heads knocking off 50 to 60hp.

A lockup 10 inch converter with a 3000 stall and a little bigger cam would get you to the 400hp mark.

Then later on, when the engine needs a rebuild, install a 350 crank for a little more power.

SoCa06Z 05-15-2012 01:49 AM

I think I'd have to run an RPM or equivalent intake to take advantage of the improved heads, right?

454C10 05-15-2012 06:00 AM

the RPM would be better but not 100% required. The performer should work OK with the better heads and the 268H cam.

However, I would recommend a regular rpm intake (not air gap) and a holley 3310 (750 cfm vacuum secondary). But if money is tight, I would use what you already have.

Also, ignition timing is important. what is your timing setup like? initial, total, and how much more from the vacuum advance?

SoCa06Z 05-15-2012 10:42 AM

Thanks for the feedback, very much appreciated. As far as ignition and timing, I am running the Pertronix Flamethrower unit with 12 degrees initial and 35 total timing.

I just found a good deal on some used AFR heads. You bring up a good point about stall speed, as I don't want to turn the car into a drag car, just a fun street machine that I can still take on a long cruise if desired. It feels like there is a fine line between performance and usability.

SoCa06Z 05-15-2012 11:20 AM

I actually just came across a local guy with some modified Vortec heads as well for $400. I am wondering if a true vortec head would get me closer to where I want to be on a much lower price tag.

So many damn decisions....

AutoGear 05-15-2012 11:45 AM

Your nova is actually infected with some sort of bad juju...Being a nice guy, I will take on this problem car for free, just sign the Nova over and I'll deal with the demons.

On a serious note; What about some brand new GM Bowtie Vortec's. you'll need a vortec specific Performer RPM manifold. Id get the ones drilled for the perimeter bolt valve covers.

If thats too much for your blood, what about a set of the factory aluminum fastburn-style heads used in the late 80s on the TPI corvettes? You wont need the vortec specific manifold and sometimes you can get a set for around 600 bucks.

If you get OEM Vortec heads, have them checked before you buy; ensure that they're a true Vortec and make sure they're not cracked by magnafluxing. To run your 268H you'll need to have the heads modified for that amount of lift; the new GM Bowtie Vortecs can already handle this and aren't prone to cracking.

Cam is fine, carb is fine, exhaust might be a little restrictive, but for street driving I don't think its an issue.


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