400Hp 305?

[Parisienne305]

Hey guys!

I found the following "recipe" on the net and i'm wondering if it would do what the article said, 400Hp 305...?

So here goes!

Comp cam CS292-H-10,
244 deg. duration at .050"lift,
110 deg. lobe center,
.501" net lift on each valve,
Crane cams' .100" shorter pushrods,
cylinder head from RHS (Racing Head Service),
Manly Pro Flo valves (with mild porting),
Victor Jr. intake manifold,
modified 650 double pumper and finally,
Hookers 1 3\4" primary headers into 3" Flowmasters.
9.01 compression.

So there it is! What do you think?

Anybody feeling the urge to educate me about 305 being no good, blah blah blah, abstain! Don't waste my\your time, please!

Hey Techinspector, i sure hope to get your input on this one!

Ciao!

[richlo65]

well hell, if it doesnt work you got a good set up for a 350.

[Matt167]

at what RPM does it make the 400 horse? I'v seen 400 hp spec builds on 305's. in reality, a 350 could make the same power, much cheaper but yes, 400 horse is not out of the question for a 305.

[chevy 37]

My 305 is only 96HP from 400 and if I put some good heads on it I'd probably pick up another 30 . Don't honestly know if I could get 400HP from my 305, but it would be sweet. Does the article say if the 400 is from the crank or rear wheels?

[kitz]

Dude I appreciate you and your dilemma.

But I gotta tell you that I would not try to build a 305 with YOUR money.

Start with the readily available and inexpensive 350 ........................

Best Wishes, Kitz

[Swifster]

I don't think you read the entire article. The engine dynoed had a final compression ratio of 10.6:1. The question to be asked is how often will you wind up a 2 ton Pontiac to 7200 RPM to get to the 400 HP mark?

For driving on the street, especially for a heavy car like yours, torque rules. I'd be hunting a high torque number low in the power band. This is typically found thru displacement (engine size).

[techinspector1]

I agree with Swifster & Kitz. Sounds like a law firm.

Hmmm, Swifster & Kitz, Attorneys at Law.

[oldman2]

Comp Cams recommended the same cam to me for my 350 running 11.1:1 compression, but I went with a smaller cam for more low end torque and at least a little vacuum for street use. They said if I was lucky, I'd get 10" Hg @1000 rpm.

[erik erikson]

Originally posted by Parisienne305
Hey guys!

I found the following "recipe" on the net and i'm wondering if it would do what the article said, 400Hp 305...?

So here goes!

Comp cam CS292-H-10,
244 deg. duration at .050"lift,
110 deg. lobe center,
.501" net lift on each valve,
Crane cams' .100" shorter pushrods,
cylinder head from RHS (Racing Head Service),
Manly Pro Flo valves (with mild porting),
Victor Jr. intake manifold,
modified 650 double pumper and finally,
Hookers 1 3\4" primary headers into 3" Flowmasters.
9.01 compression.

So there it is! What do you think?

Anybody feeling the urge to educate me about 305 being no good, blah blah blah, abstain! Don't waste my\your time, please!

Hey Techinspector, i sure hope to get your input on this one!

Ciao!

If you had the same combo. in a 383 it might even be (streetable).

[Parisienne305]

Thanks guys!

I do have a 350 in stock (in another car), but i found the concept interesting...

If i do something with the 350, what kind of "bolt-on" parts could i use to get great low end torque and decent power for my "2 ton car"? Please specify every part!

Thanks again!

[hambiskit]

It's a Pontiac.....high torque big blocks stock...I don't get it.

[Parisienne305]

Hey Hambiskit...i'm not sure i get your point...
What are you saying?

[Swifster]

Originally posted by hambiskit
It's a Pontiac.....high torque big blocks stock...I don't get it.

Yeah, as Denny posted above, a Parisienne is a Chevy Caprice with a Pontiac grille. If I remember correctly, the largest engine was the Chevy 350.

As for engine suggestions, I'd go with a Pontiac 455. Car Craft did a build up on one of these.

Car Craft article: From Junker to Thumper

[Parisienne305]

OK guys!

But i'm still not sure what he meant...but i do get the point that bigger motor does better torque.

I also know that my car was the counterpart of Chevy Caprice...not really a classic but a good sleeper!

I found a 400 for 200$ and a 454 for 650$...if i get the dough before it's gone, it'll be mine!

[MadMax]

I read an articel a couple of days ago on a chap who tunes Suzuki motorbikes. He gets 390 HP (apparently dynoed) out of a 1400cc four cylinder Boxer-Engine. But that's turning 10.500 RPMs. It's all an RPM-thing. I just don't see the point in paying a lot of money for a small engine that has to turn so high. You'll get problems with bottom end-parts breaking and the dizzy will run out of spark and you'll get real friction problems if you go far over 6.500 very often on a 305. There's so much more you'll have to do to it to make it work really well... Get a Stroker if you want power at low engine speeds. Building a 383 with 400 horses isn't a that big deal... If you go for a Pontiac, they have quite a lot of torque from the start, drop in a 6.6l Pontiac and give it a nice intake, headers, a hot cam and some decent heads (probably no need to go aftermarket, just common sense porting should do it) and you'll be heading at that number for under 2k.
just my penny worth,
greetings from across the pond

and BTW: what sense does it make to state what length pushrods you need? depends on your gasket, on whether the block is decked, the heads milled, what rockers you use, what valves...