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Old 01-10-2014, 11:36 AM   #1
philbilly
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Default Dyno numbers 305

Curious if anyone would share some numbers. Like horsepower and torque. I am building a 305 for a Malibu wagon and wondered what kind of numbers I would be looking for.
I made a pull last night. The engine I got right now is weak as water I pulled it and now gonna disassemble it and give it a freshen up.
Looks like it made a whooping 318 hp at 5700

What would be considered a stout number for a 305??

Hopefully it will make quite abit more in a few weeks.
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Old 01-10-2014, 11:56 AM   #2
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Default Re: Dyno numbers 305

What number heads ?? 416's

Is it the small cam motor ??

I would say 375- 390 is Pretty Stout.
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Old 01-10-2014, 12:07 PM   #3
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Default Re: Dyno numbers 305

Yes 416 heads. Not sure what cam is in it.i think it call for a 357 390 tho
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Old 01-10-2014, 12:18 PM   #4
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Default Re: Dyno numbers 305

Phil, there is a tread on here with formulas, N/SA weight 3505, 12.0 1 second under, 110 mph, 400.09 hp at flywheel and 360.1 at rear wheels, I have the same motors in my cars, but I never had my motors on a dyno. Tom
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Old 01-10-2014, 12:32 PM   #5
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Default Re: Dyno numbers 305

Quote:
Originally Posted by philbilly View Post
Yes 416 heads. Not sure what cam is in it.i think it call for a 357 390 tho
357/390 is the small cam motor.
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Old 01-10-2014, 06:43 PM   #6
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Default Re: Dyno numbers 305

84 flat top Hp 355 @ 6200. tQ 345 @ 4600. Best .98 under index I/S Ihra.
5 year old dyno #s. Don't believe 20 extra horses for "big cam" is warranted.
---Trevor
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Old 01-10-2014, 09:15 PM   #7
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Default Re: Dyno numbers 305

397-400 hp to go 1.15 under (11.50) on a '80 small cam motor in K. gsa612
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Old 01-10-2014, 09:22 PM   #8
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Default Re: Dyno numbers 305

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397-400 hp to go 1.15 under (11.50) on a '80 small cam motor in K. gsa612
400 crankshaft HP runs 11.50s @ 3500 pounds.
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Old 01-10-2014, 09:32 PM   #9
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Default Re: Dyno numbers 305

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400 crankshaft HP runs 11.50s @ 3500 pounds.
It was a 80 malibu 2 dr. weighed 3200 in K/SA.The OP's is a wagon in N. gsa612
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Old 01-11-2014, 07:57 AM   #10
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Default Re: Dyno numbers 305

I am puttin this in a N/sa wagon. I got the engine apart yesterday looks like there was alot of power slipping through the rings.

Whos camshaft are some of you guys using? what kind of rpms are the 305 good for? does it make since to use the tool lifters??

On the lifters there was no difference in my 283 other than i was scared to death one was going to shatter. I have shubecks


I really appreciate you racers that respond as i am running out of time to make div 2 opener. I have a ride but really want to get my wagon finished. I know finding 70 plus horsepower is a shot in the dark for a idiot like myself but i am gonna give it my best
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