What could a person expect - Team Camaro Tech
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post #1 of 14 (permalink) Old Apr 30th, 15, 10:24 PM Thread Starter
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Tony
 
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What could a person expect

To gain in hp with these add ons...

L48 rebuilt to stock (supposedly) bored .20 over
Sum-1103 cam .442 ex .465
Original block (HB) heads (041)
Pertronix 2 and flame thrower added to original dist
Performer RPM (non air gap)
Speed Demon 650 vs
dynatech 1 5/8 headers
2.5 exhaust 40 series flowmasters

I'm not racing the thing at all but now that it's done it sounds and runs really good. I was curious if someone could give me a ball park on what this might produce.

1969 Camaro SS350, original motor/12 bolt/interior and build sheet in Fathom Green.
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post #2 of 14 (permalink) Old May 2nd, 15, 11:58 AM Thread Starter
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Tony
 
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Re: What could a person expect

Any opinions?

It's supposed to be a 350/300 so since I added those add ons I just wondering if I could expect at least a 20 hp gain or more?

1969 Camaro SS350, original motor/12 bolt/interior and build sheet in Fathom Green.
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post #3 of 14 (permalink) Old May 2nd, 15, 12:37 PM
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the BOSS&Ralph
 
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Re: What could a person expect

I have hopped up a few 350/300s over the years. They were everywhere, kind of the 5.3 LS of their day. One I did back in '76 was sweet. Cam was a solid flat tappet, around 230 @ 050" and .490 lift, original Torker intake and 800 Holley DP. In a '69 Vette it trapped at 105. I spent an afternoon doing basic porting to the 1.94 heads and it then trapped at almost 109. The basic 350 HP engine is a good base for a build. The cast pistons were the first thing to give me problems on them when pushed too hard.
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post #4 of 14 (permalink) Old May 2nd, 15, 01:59 PM
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Re: What could a person expect

I've built a few Chevies and have a 550 hp 383 at the moment. Your mods are pretty minor in the overall scheme of things, but I suspect you might pickup 25-35 hp over whatever the base was.
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post #5 of 14 (permalink) Old May 2nd, 15, 02:16 PM Thread Starter
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Tony
 
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Re: What could a person expect

Yeah nothing internal. I just wanted it to run good and be reliAble. If it's 325-335 that'd be good for me.

1969 Camaro SS350, original motor/12 bolt/interior and build sheet in Fathom Green.
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post #6 of 14 (permalink) Old May 2nd, 15, 11:07 PM
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Smile Re: What could a person expect

Without new heads you probably won't get over 300 hp. The power is in the heads.

69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 transmission, 12-bolt w/Eaton 4.11:1
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post #7 of 14 (permalink) Old May 3rd, 15, 09:15 AM Thread Starter
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Tony
 
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Re: What could a person expect

Ok. New heads won't be an option. My motor is original so what about minor head upgrades? Someone mentioned porting on other threads. Does that do much or would it be better to go from 1.94 to 2.02?

1969 Camaro SS350, original motor/12 bolt/interior and build sheet in Fathom Green.
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post #8 of 14 (permalink) Old May 3rd, 15, 11:49 AM
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Bill
 
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Re: What could a person expect

The stroker motor I mentioned is in my '33 Ford, but I also have a '67 RS/SS 350 Camaro that I purchased new. I use my original heads on that, (1.94 valves) but did port and polish them. I use an Isky 280 hyrdraulic cam with it, along with 1.5 roller rockers and Edelbrock Torquer II intake, a Holley 550 carb, long tube headers and electronic ignition. It has a 4 speed Muncie and 3.73 rear gears. I don't know the dyno'd horsepower on it, but it runs high 12's in the quarter, so I suspect it must be close to 400, so you can get some horsepower out of the 350's with some simple mods.
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post #9 of 14 (permalink) Old May 3rd, 15, 01:08 PM
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Smile Re: What could a person expect

To get a noticeable increase in power I would have them ported and bowel blended along with 2.02/1.6 valves.

69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 transmission, 12-bolt w/Eaton 4.11:1
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post #10 of 14 (permalink) Old May 3rd, 15, 01:50 PM
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Here is a desktop dyno run of your combo. They are usually quite optimistic on the results.


69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 transmission, 12-bolt w/Eaton 4.11:1
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post #11 of 14 (permalink) Old May 3rd, 15, 02:05 PM Thread Starter
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Re: What could a person expect

Thx for responses and that Dyno sheet. That torque looks ok at 3500. I'll look into the head work. What kind of increase would a person see with the porting and 2.02?

1969 Camaro SS350, original motor/12 bolt/interior and build sheet in Fathom Green.
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post #12 of 14 (permalink) Old May 3rd, 15, 06:48 PM
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Re: What could a person expect

Quote:
Originally Posted by TClovis View Post
Thx for responses and that Dyno sheet. That torque looks ok at 3500. I'll look into the head work. What kind of increase would a person see with the porting and 2.02?
Don't spend money on those heads.

A set of stock vortecs will add 30 hp and improve gas mileage.

Just drive and enjoy it for now.

Government's first duty is to protect the people, not run their lives.
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post #13 of 14 (permalink) Old May 4th, 15, 07:31 PM Thread Starter
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Tony
 
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Re: What could a person expect

Yeah it runs good now so I may get used to it, mild as it is.

1969 Camaro SS350, original motor/12 bolt/interior and build sheet in Fathom Green.
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post #14 of 14 (permalink) Old May 4th, 15, 10:02 PM
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Re: What could a person expect

You can always change out the heads and keep the originals but if it is running good why mess with it? If you decide to change the heads do some research and make some calls to the tech lines of the top companies. Trans, gears, heads and cam need to work well together and your bottom end needs to be able to handle what you put on it.

68 RS Coupe 355/350 TH, Detroit Speed, Hotchkis, Vintage Air, 8.5" 3.42 posi 10-bolt, MagnaFlow 2 1/2" exhaust, etc.

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