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Old 04-12-2013, 06:20 PM
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good wrench 350 cam upgrade

Hi i am new to the forum, and a hobby hotrod guy. I build a 1965 nova and have some engine upgrade questions. the car has a stock goodwrench 350 crate engine with edelbrock intake and 600 carb, headers, and hei ignition, it has a turbo 350 trannie with 2200 rpm stall and shift kit, the rear end has 3.73 gears with auburn locker. the car hauls, it is a street car and a little fun a 1/8 mile track. some day i hope to to a head swap but for now I am trying to wake up the 350 a little more. I was hoping for some direction to a good performance cam upgrade base on all the other mods to car. i am thinking the cam used in the 290 hoarse 350 or doing another with sping replacement if needed. thanks

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Old 04-12-2013, 06:25 PM
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Quote:
Originally Posted by 65novablu View Post
Hi i am new to the forum, and a hobby hotrod guy. I build a 1965 nova and have some engine upgrade questions. the car has a stock goodwrench 350 crate engine with edelbrock intake and 600 carb, headers, and hei ignition, it has a turbo 350 trannie with 2200 rpm stall and shift kit, the rear end has 3.73 gears with auburn locker. the car hauls, it is a street car and a little fun a 1/8 mile track. some day i hope to to a head swap but for now I am trying to wake up the 350 a little more. I was hoping for some direction to a good performance cam upgrade base on all the other mods to car. i am thinking the cam used in the 290 hoarse 350 or doing another with sping replacement if needed. thanks
Please read through this camshaft advisory so that you will choose the best match for your motor based on the static compression ratio of the motor......
http://www.crankshaftcoalition.com/w..._compatibility
If you close the intake valve too early, the motor may build excessive cylinder pressure and detonate on the available fuel that you are using. If you close the intake valve too late, you will leak off so much cylinder pressure that the motor will be a dog. It's a balancing act.....
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Old 04-13-2013, 03:13 AM
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Very well said Tech. Clear , concise and simply easy to understand.
Good to see you back on deck the last few days! I was quietly concerned, hoping that everything was ok with you...
Welcome to the forum 65novablu , there's a lot of good, albeit sometimes divided, opinions and advice right here.



Duke
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Old 04-13-2013, 05:10 AM
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I bought a 350/290 HP crate engine for my truck and it worked fairly well. However, the truck is heavy, and I have a stock TH350, and when using it as a truck I needed more power at low RPM. I ended doing the opposite of what you want, and swapping back to a Summit 1101 cam that is similar to the one in the stock Goodwrench engine. Both cams worked well, but the original GMPP cam needed more rpm to wake it up so you might need a higher stall.

I still have the 290 HP cam somewhere (I just moved and the garage is a mess). Send me a PM if you might be interested.

Bruce
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Old 04-13-2013, 01:01 PM
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The cam from the 350-290HP crate motor is very pooor with a low compression ratio.
No torque. Needs 10:1++cr or its a dud.

Either raise the compression ratio or find a better suited cam for low compression.
The heads on your motor suck too.
If you want a cam to work you need compression and port flow.

The poor mans racing head swap achieves both at low cost.
it is one of many good ways to skin this cat.

Do the cam and head swap at the same time.

There are a ton of better cam choices for this motor than the old 60's era GM cam.
Its a really bad cam for a low compression ratio engine.

Last edited by F-BIRD'88; 04-13-2013 at 01:12 PM.
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Old 04-13-2013, 10:14 PM
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on that motor with a stock dished piston, you want a cylinder head with a 58cc chamber
and use a .015" shim gasket.

Even a 64cc head is barely in the program.

Now you can make use of a high performance cam.
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Old 04-14-2013, 08:49 AM
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If it's a roller the OEM cam we have used before which is still available from Summit is 14097395.Pretty decent low/mid response.

Don't like as a active commercial engine builder the shim head gaskets of .025 for street use.Rather deck the block/mill the heads to bring about the correct quench.The .025's don't have much bite in them and require special handling in the finish of the block deck.In any case,your trying to make a pc of coal in the OEM heads into a diamond where you can raise the SCR,but without having the flow numbers to match.Just like taking a bad situation and turning it into a worse one trading issues.

Remember.The one thing that is a constant.Not knowing if built correctly what your combo could have......................Then spent money on all the wrong things having to do a do-over costing even more!!.
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Old 04-14-2013, 06:26 PM
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If you were actually a active engine builder (or even a casual builder) you would know that the shim gaskets are .015" not .025"..

I have never had one leak or fail in 35 years, even with 12.60++compression. Even with nitrous.
Or on used blocks with far from idea decks.

Do not claim to be something you are not. No credibility. None of that made any sense anyway.
Gary you should really stick to your auctions.
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Old 04-14-2013, 08:11 PM
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Originally Posted by F-BIRD'88 View Post
If you were actually a active engine builder (or even a casual builder) you would know that the shim gaskets are .015" not .025"..

I have never had one leak or fail in 35 years, even with 12.60++compression. Even with nitrous.
Or on used blocks with far from idea decks.

Do not claim to be something you are not. No credibility. None of that made any sense anyway.
Gary you should really stick to your auctions.
Well if you would listen you wouldn't be 35 yrs behind.Your kind of advise ends up costing people MONEY!!!. Still you persist on this backyard B.S. with your at best a 13 second car.

Credibility??. You??. That's laughable.

This is a typical tactic when overrun with logic.To attack on a personal basis.

If you don't know,many have given up on you.Yeah I am crazy in that I still think there is something salvageable.In the meantime I just gotta make sure you don't hurt anyone.It's just the right thing to do.............
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Old 04-15-2013, 01:46 PM
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Sorry to disappoint, but the car runs 11's.
And for not a lot of money either.
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Old 04-15-2013, 04:58 PM
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Quote:
Originally Posted by 1Gary View Post
If it's a roller the OEM cam we have used before which is still available from Summit is 14097395.Pretty decent low/mid response.

Don't like as a active commercial engine builder the shim head gaskets of .025 for street use.Rather deck the block/mill the heads to bring about the correct quench.The .025's don't have much bite in them and require special handling in the finish of the block deck.In any case,your trying to make a pc of coal in the OEM heads into a diamond where you can raise the SCR,but without having the flow numbers to match.Just like taking a bad situation and turning it into a worse one trading issues.

Remember.The one thing that is a constant.Not knowing if built correctly what your combo could have......................Then spent money on all the wrong things having to do a do-over costing even more!!.
The advise stands.

What not to buy

http://www.cnc-motorsports.com/gaske...-per-pack.html

Last edited by 1Gary; 04-15-2013 at 05:05 PM.
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Old 04-15-2013, 06:51 PM
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[QUOTE=1Gary;1666498] Still you persist on this backyard B.S. with your at best a 13 second car.

How fast is the car you drive?
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Old 04-15-2013, 06:59 PM
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F bird....and Gary1 .....come on guys......lets exercise some tact.
Everyone has a valuable opinion, lets being gentleman about it.
Slamming each other looks childish to other who read the post.
It also has no value to the thread. Lighten up.
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Old 04-15-2013, 09:59 PM
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F bird....and Gary1 .....come on guys......lets exercise some tact.
Everyone has a valuable opinion, lets being gentleman about it.
Slamming each other looks childish to other who read the post.
It also has no value to the thread. Lighten up.
Interesting
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Old 04-15-2013, 11:27 PM
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[quote=prostreet6t9;1666928]
Quote:
Originally Posted by 1Gary View Post
Still you persist on this backyard B.S. with your at best a 13 second car.

How fast is the car you drive?
Been in a 9.90 car(s) for yrs.Fastest was a 8 second 1/4 car.Part owner with a driver wrenching on a 4.56@150mph car.
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