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  #16 (permalink)  
Old 08-06-2012, 06:03 PM
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sorry but just changing the cam, intake, headers, and carb on an otherwise stock rebuild 400 that originally cam from the factory with around 150hp wont get you a bunch of power. the very most important thing when making power out of a motor is the heads. if they can't produce then they just can't produce. after all they were made to only push around 150hp. not to mention the terribly low compression. then you add that with a 2.73 rear gear and a 1.70ish first gear in the PG trans and you will have a dog! if you want to keep the PG then you need to look more into the 4.56-4.88 gear range just to equal what a th350 would do with a 3.42 gear.


change the heads or keep your power goals very low, like 230hp/300tq ish which in a 3200-3400lb nova and the trans and gear should have you running about a 16 in the 1/4. sorry

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  #17 (permalink)  
Old 08-06-2012, 09:47 PM
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Stock 400s made a factory claimed 265 HP with low compression. When I said he could make 330 ish HP thats a moderate improvement and easily done with smogger heads.My friend Mike ran
a monte carlo with a rebuilder long block, TQ20 camshaft,750 carter and small tube headers,,, 14.1s
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Old 08-07-2012, 07:30 AM
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Wrong answer, for their earliest years such as 70-71 they could be had with as much as 265hp, and this was before the huge smog combustion chamber heads.

Your statement here is about the same as saying that all 350's ever made came with 290hp. In 72 the 454 dropped down to around 250ish up. Do you really think they would have one of their small blocks as an option to put out more power than their most powerful big block option. Yes the first couple years the motor was out it was rated at 265hp, but if you actuall look at the smog era you will see that during that time it also made as low as 145hp too.

And we just love "my buddy" stories

You "buddy" ran 14.1 in the 1/4 okay a stock 92' 5.0 mustang could run mid to low 14's with 225-235hp so your buddy running 14.1's still ain't saying to much here.
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Old 08-07-2012, 07:49 AM
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Guys the op hasn't replied in days. Just let it go.
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Old 08-07-2012, 07:13 PM
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I have other cams 2. Thtz just the one I thought would work the best. Someone give me a better cam choice then. $$$ ain't 2 big of a deal. What's a better cam 4 a 400 then? The motor was out of an oval track car 4 bolt main. So I don't think its classified as "stock"
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Old 08-07-2012, 07:15 PM
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Quote:
Originally Posted by 1971BB427 View Post
A stock 400 with that cam will be a dog below about 2800rpm's. No way it will hit even high 14 sec. in the 1/4, especially with those tall gears and the tall 1st gear in a powerglide trans. I'd bet money it wont do better than 15's in the 1/4. Might not even get into 15 sec. in the 1/4!
How much yu wanna bet!!!!
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Old 08-07-2012, 07:20 PM
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Quote:
Originally Posted by blackpanther68 View Post
I have other cams 2. Thtz just the one I thought would work the best. Someone give me a better cam choice then. $$$ ain't 2 big of a deal. What's a better cam 4 a 400 then? The motor was out of an oval track car 4 bolt main. So I don't think its classified as "stock"
Need engine specs man. Can't tell you anything if we don't know what's going on with the engine.
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Old 08-07-2012, 07:25 PM
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And the stall converter in questions of being used was a 2800 if I haven't already said something. But my dad also has a 3200 if there is one or something in tht range. I see someone threw me a few cam choices. Ima go take a look. And someone wrote a book givin me some advice 2 so ima take tht as well.
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Old 08-07-2012, 07:27 PM
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Need engine specs man. Can't tell you anything if we don't know what's going on with the engine.

Engine specs like what? 400 specs? Its got a 4.125 bore 5.565. Rods cast dish pistons. . .
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Old 08-07-2012, 07:34 PM
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Lol no. Get these things and i'll help you:
1. Compression ratio/piston type.
2. Valve size
3. Chamber size
4. Springs
5. Intake and carb
6. Car weight
Unless you are planning on doing a full build then i can suggest all of those. Or i can chose a cam that work with what you have.

You will have to change your rear gears though no matter what.
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Old 08-07-2012, 07:36 PM
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m87z,,lol. My buddy story is a true fact. I listed the parts exactly as we used them. I did the wrenching on the car after we purchased a 400 long block reman from Bond Mechanical in Vancouver BC.The car was engine and a rebuilt turbo 350 with shift kit all in for 2k. We used the buy and sell for the intake manifold. Later we ran 1 pass of 13.3 with a cam change and 4.1s. Mike,my good friend and owner of the car quit driving soon after his 1 and only 13 second pass when he found out he has MS.
Look at my corvette, it has a 434 in it, wanna check? come take it apart! I HAVENT POSTED 1 BS STORY YET! Im a little upset ,,,, If you are really skeptical,check out my current car.
PS,when did the change to SAE hp ratings?
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Old 08-07-2012, 08:33 PM
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(sorry but just changing the cam, intake, headers, and carb on an otherwise stock rebuild 400 that originally cam from the factory with around 150hp wont get you a bunch of power)

lol,actually those are the first things you change to make a bunch of power in a smogger engine.Any GM head with 1.94 intake valves will make enough power on a 400 to put you deep into the 13s,even with 8.5:1 compression.
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Old 08-07-2012, 09:09 PM
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Originally Posted by blackpanther68 View Post
How much yu wanna bet!!!!
Do you really want to lose money on top of the other mistakes you're making?
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Old 08-08-2012, 12:56 AM
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Unless you are asking specific questions it is kind of like arguing about shaving cream. You like the gel, he likes the foam. These forums have got so weird.

gross and net power rating hype... in 70 a 350 camaro made 330 hp, the 71-72 made 255hp. The 350 engines , drivetrain and exhaust were identical. All just advertisement.

In 70 the mopar 383 ebody made 335hp 71-72 made 275hp. Again everything was the same it was only advertising.

the 70 318 claimed 230hp the next year was 150 nothing changed.

Nothing, no chamber size, deck height, intake, carb, manifolds, piston,head, emission excuse, nothing. Rumor was insurance and gas crisis scare.

Some different engines options were avalible, but the examples i refer are the same engines.
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Old 08-08-2012, 08:35 AM
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Unless you are asking specific questions it is kind of like arguing about shaving cream. You like the gel, he likes the foam. These forums have got so weird.

gross and net power rating hype... in 70 a 350 camaro made 330 hp, the 71-72 made 255hp. The 350 engines , drivetrain and exhaust were identical. All just advertisement.

In 70 the mopar 383 ebody made 335hp 71-72 made 275hp. Again everything was the same it was only advertising.

the 70 318 claimed 230hp the next year was 150 nothing changed.

Nothing, no chamber size, deck height, intake, carb, manifolds, piston,head, emission excuse, nothing. Rumor was insurance and gas crisis scare.

Some different engines options were avalible, but the examples i refer are the same engines.
The change was from flywheel rated HP to RWHP.
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