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Old 06-11-2002, 09:08 PM
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Red face 305 build

I need help on getting HP from my 92 305ci Chevy engine. It is going in a Vega And i want anyones opinion. I know this is a task for the 305 but give some advise for that block.

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Old 06-12-2002, 10:11 PM
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I had an 81 el camino and I put a 224 duration 465liftcam. A single plane weiand intake, accel coil, Full lenth headers, 2.5 inch pipes with glass packs, and a 600cfm carb, 2400 stall converter. It made a big difference top end but it had no torque. But i only had 2.43:1 gears. After putting 4.11:1 gears in it screwed. Not too hard to get some horses just put a cam it it gears and intake make the biggest difference. My suggestion get a 350. More toque and easier to get some power out of the possibilities are endlees. Hope I helped you out. Have fun
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Old 11-11-2002, 06:24 PM
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use the 305 for your boat anchor. get a 350, lots more possibilities than with what you got.
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Old 11-11-2002, 07:09 PM
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problem with 305 is it doesn't have a wide enough bore for decent vavles.
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Old 11-11-2002, 08:00 PM
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305's are great little motors, the internals are basically the same as a 350 except for bore size.
Go to <a href="http://www.summitracing.com" target="_blank">Summit Racing</a> and look at their stroker kits.
You can build a 335 stroker motor for about the same amount or less than you can a 383 stroker.
Good for a few ponys and with such a lightweight car as a Vega, you don't need 500+ HP.
I can't knock the 305's I rebuilt one for next to nothing with a decent cam,carb,headers, etc...Ran like a blueass baboon.
Later,
WEIMER
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Old 11-11-2002, 10:12 PM
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try to build the motor with as high an rpm range as you can stand on the street and then put a hella lotta compression in it(comp helps with the loss of low end torque from the small bores and thehigh dur.cam).and ill get alot of greif from this but trust me it works-try to get about 10.5:1 comp or more then use water injection to help it run on pumpgas. then take two 350's and call me in the morning j/k a 305 can be potent if assembled in the right hands but the lack of displacement wont allow you to run with the 350's if they were also assembled with caring hands. :p
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Old 11-11-2002, 10:16 PM
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I know I haven't been able to blow up my 305 (reved it to 9000 rpm in a stock 85 camaro)

Know another guy with a 305 HO and he went 100 km/h in second gear, it blows a little smoke now
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Old 11-11-2002, 11:04 PM
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9,000 RPM! Did you have the tach set on 4cyl?
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Old 01-20-2003, 07:04 PM
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Talking

I just came accross this Bulletin Board.
Interesting responses to the 305 ver. 335 stroking it.
Some responses are helpful; but some shows lack of knowledge.
My friends asked the same thing: " why stroke a 305 to 335"? When you can just use a 350...
Simple; to be different, and to save weight.
I used a one piece 383 stroker crank and 5.565 rods with yes STOCK 305 flat top pistons. For camshaft I used a ZZ4 roller with crane 1.6 roller rockers.
Pocket ported heads and .600 lift springs.
The car is a 1988 Trans Am with 5 speed manual.
For my fuel injection I am running dual TBI on a dual quad manifold.
The TBI's were cleaned up; bored to 2" and injectors raised; as well as an adjustable preasure reg.used.
I am using Hooker headers going into one 3" exhaust all the way to a stainless steel dual outlet muffler.
Also with the 40 over bore the engine is very close to a 350.
When the car was fired in the exhaust shop many people did a double take and I heard customers tell the clerk they want their car to sound that way.
The sound give you goose bumps; a really low cool sound.
Not like some moron at 3 AM wailing on the other side of town.
Watch the movie "The Car" it sounds just like it.
As for stonedchihuahua The heads are also used on 305/350 engines.
If you are using valves over 2.0" yes you would encounter some flow problems. Valve size depends on rpm you will be running at.
I doubt you would be running at 6000 rpm all day.
That is where large valves help; HIGH RPM.
The 1.94/1.60 I am using work fine.
I am making more than 1 horse power per inch.
In parting many parts for the 350 interchange with the 305; don't knock it.
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Old 01-20-2003, 07:45 PM
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hey vega man 4 door joe here check out album my friends vega if you suffer from wet dreams you may want to look in morning ENJOY
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