Dyno numbers 305

philbilly · 01-10-2014, 11:36 AM

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.

Pistol Pete · 01-10-2014, 11:56 AM

What number heads ?? 416's

Is it the small cam motor ??

I would say 375- 390 is Pretty Stout.

philbilly · 01-10-2014, 12:07 PM

Yes 416 heads. Not sure what cam is in it.i think it call for a 357 390 tho

Tom Moock · 01-10-2014, 12:18 PM

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

Pistol Pete · 01-10-2014, 12:32 PM

Quote:

Originally Posted by philbilly

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.

tj310 · 01-10-2014, 06:43 PM

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

gsa612 · 01-10-2014, 09:15 PM

397-400 hp to go 1.15 under (11.50) on a '80 small cam motor in K. gsa612

HP HUNTER · 01-10-2014, 09:22 PM

Quote:

Originally Posted by gsa612

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.

gsa612 · 01-10-2014, 09:32 PM

Quote:

Originally Posted by HP HUNTER

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

philbilly · 01-11-2014, 07:57 AM

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

01-10-2014, 11:36 AM	#1
philbilly Member Join Date: Aug 2011 Location: Demossville,KY Posts: 337 Likes: 0 Liked 0 Times in 0 Posts	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.

01-10-2014, 11:56 AM	#2
Pistol Pete VIP Member Join Date: Oct 2003 Location: Punta Gorda Isles, Fl. Posts: 1,324 Likes: 760 Liked 97 Times in 44 Posts	Re: Dyno numbers 305 What number heads ?? 416's Is it the small cam motor ?? I would say 375- 390 is Pretty Stout. __________________ "Pistol" Pete Dutko

01-10-2014, 12:07 PM	#3
philbilly Member Join Date: Aug 2011 Location: Demossville,KY Posts: 337 Likes: 0 Liked 0 Times in 0 Posts	Re: Dyno numbers 305 Yes 416 heads. Not sure what cam is in it.i think it call for a 357 390 tho

01-10-2014, 12:18 PM	#4
Tom Moock Senior Member Join Date: May 2004 Posts: 801 Likes: 1 Liked 10 Times in 6 Posts	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 __________________ Tom Moock 5704 STK

01-10-2014, 06:43 PM	#6
tj310 Member Join Date: Sep 2009 Location: Dresden On. Canada Posts: 460 Likes: 0 Liked 0 Times in 0 Posts	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

01-10-2014, 09:15 PM	#7
gsa612 Member Join Date: Jan 2008 Location: 100th Meridian Posts: 439 Likes: 44 Liked 146 Times in 74 Posts	Re: Dyno numbers 305 397-400 hp to go 1.15 under (11.50) on a '80 small cam motor in K. gsa612

01-11-2014, 07:57 AM	#10
philbilly Member Join Date: Aug 2011 Location: Demossville,KY Posts: 337 Likes: 0 Liked 0 Times in 0 Posts	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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