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.

Re: Dyno numbers 305
 

What number heads ?? 416's

Is it the small cam motor ??

I would say 375- 390 is Pretty Stout.

Re: Dyno numbers 305
 

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

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

Re: Dyno numbers 305
 

357/390 is the small cam motor.

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

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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400 crankshaft HP runs 11.50s @ 3500 pounds.

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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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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

Re: Dyno numbers 305
 

You'd be surprised what a GREAT pair of 416 heads can do for you.
I had Shubeks on my ol 305 motor with no problems.
I had a Bullit cam, not sure of any specifics.
My motor had flat top pistons with the small cam.
You run a wagon, so do you have flat top pistons or other ???
PLUS, make sure you have a Very Good Carb. Very Important.

Dish piston, is that what u have ??

Re: Dyno numbers 305
 

Pete it is a dish engine. I have the 416 heads. The cam is under ?? With me. I am on my way to the shop to get me some numbers. I appreciate everyone. I really do.

Re: Dyno numbers 305
 

I do not know how fast you want to run or if your on a budget.

The BEST engine guy is Bub Whitaker from Md.
He Will Work With You.

Little costly but your car Will Fly......

I sold my carb 305 motor & went to an F.I. set up, if i didn't do that, Bub was doing
my next motor. Of course down the road i'm sure he will be freshening this one i have now.

Re: Dyno numbers 305
 

If its in your budget I'd call Bruce Parsons and investigate getting him to do the heads/manifold. They are in Dayton (virtually downtown but still an easy drive for you). He can get you in the ball park for cylinder wall hone and a ring package to get a good seal. If you need to make do with your current heads then call the Comp Cams tech line and ask to speak with Tim, he can set you up with cam and lifters that will get the job done. Again, if you need to go with current heads you should get the spring specs and pressures before calling. If you need to make Orlando then obviously the latter course of action would be quicker. RPM=$$$ so you have to decide if you want to run comfortably under the index (even at Bristol) or want a 1.0 under car, in which case Bruce or another reputable builder like Bub needs to come into the picture.

Re: Dyno numbers 305
 

Give me a call I have some items you may be interested I'm, Jim 618-920-6269

Re: Dyno numbers 305
 

10 years ago, my good friend and customer Jeff Stealy (Rest in Peace my friend) was doing Chevy 305's that were making 415-420 H.P. on the Dyno. And if you ever saw his own Camaro with the 305 in it, it flew!

Re: Dyno numbers 305
 

I dont feel i need a engine bulder at this point. I have a good shop here local and i can go anytime and act like i know what i am doing.:D
The heads on this engine has been worked so I am not going to do much there just yet.
The cam is small and the cylinders need atleast 30 to clean them up. this engine had more compression in the oil pan than the hedders.:D
it also got stock rocker arms (dont know if rollers will help or not)

I will be happy to see a significant increase in horsepower. I enjoy bustin wrenches. My teenage boys enjoy it alot

Re: Dyno numbers 305
 

call me 330-220-1575

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Keep me posted on your results when it finally gets to the dyno or track.

I'm very curious.

Good Luck.

Re: Dyno numbers 305
 

I sure will. I plan on being back on the dyno within 2 weeks. Depending on horsepower I will head out for immokalee then whatever is next. (i dont plan I just go):D Sgmp and gators is a must.

Monday I will have camshaft and pistons in the works.

Re: Dyno numbers 305
 

Ring seal is critical. Fixing that will help a lot, and really must happen before you can do much else.
I ran a 87 Firebird 305 carb motor for a while, and they do work well. That was before roller rockers were legal, and I spent a lot of time checking and replacing rocker arms. The 305 was hard on them. The roller rockers should give you some hp and save you a lot of headaches. Use good pushrods too!
Bullet and Comp both work well with stocker racers, and either should be able to get you a good, up to date, cam. I have used both in the past.
Good luck, and have fun!

Ken

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That was the 85? HO carb. motor,that's what they made.They ran real light, would go high 10's in G. gsa612

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i have contacted cp and looks like it may be a couple weeks waitin on some pistons. whoever recommended cp to me i appreciate that.

And yes cp contacted me on sunday. Marshall is top notch.

Re: Dyno numbers 305
 

Very Cool!!!

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May have to wait about 6 weeks? That's what I've been told.

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Your gonna like them.

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I was told 4 weeks. But for 200 I can get in 2 weeks. 300 I can have in 1 week. I am doing some negotiating cause I ain't waitin till February for pistons.

Re: Dyno numbers 305
 

Yes, CP is a good choice.

But if you are not putting them in a properly prepped Bowtie block or a properly prepped/sleeved 350/307 block, you aren't going to find the power you are looking for.

Unless you have a rock solid stable cylinder wall, with the right finish, no piston or ring package will help you.

Also consider calling Total Seal for your ring package. If you are used to buying a $50 ring set, then prepare yourself before you call. Good ring packages can be ten times that amount.

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why CP over everything else? I have them are they that much better than the others?

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I can tell you what made my mind up. Cp seemed smarter than the other companies. They knew what I was looking for.:)

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I was told 4 week wait on pistons still havent gotten them. I am not very happy with this co. I wanted to race south georgia...

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Pistons arrived today from cp. I ran rotating assembly over to Terry Smith and got the final balance. We got about all the rings ready. Block is prepped and ready. Looks like I might make South Georgia.
If I have enough time I am going to run it on the dyno. I may have to settle with a few laps up the road! I will dyno when I get in from the gators.

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Good luck Phil ! I wish I could be there @ sgmp too !

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Yeaaaa for Pistons! :D Go-Go-Go!

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Naives engines finished my engine around 7. It was around 3 am finishing up everything in the car. It was a little late but my neighbors understand. No dyno time so I had to run it a bit. Everything seemed good so we loaded it on the trailer an headed to South Georgia . No runs today but tomorrow will be the tale of the tape. I got my fingers crossed. I will post up some numbers good or bad.
I have no idea what to launch or shift at.

Re: Dyno numbers 305
 

I wish you The Best!
Enjoy yourself and have fun.

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philbilly, good luck at sgmp, be careful doing your burnout when come out of the water, don't over rev your motor or you will bend your valves, it's easy to bend them, I'd try 6200 shift point, if you stay in low gear to long you will fill the car slow down. Tom

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Well I ain't sick! I shifted at 6 have 7 quarts of oil in. We landed a 12.54 on the first run. I don't want to try anything now because it's gonna be race time. Hopefully it will repeat some numbers and we will get they day one.

Re: Dyno numbers 305
 

Cool! Good luck!
Robert
Stk 2061
O/SA Malibu Wagon

Re: Dyno numbers 305
 

Phil - Very impressive number for first time out! Congrats and good luck.