[Ghetto Jet]

if you check out the whole power band it was getting an extra 11-15 hp across most of it. The only problem with that test is it cuts off at 5300 RPM's after 5500 is where the RPM intake will really out do the performer, and your cam makes good power up to about 6000-6200 rpms.

[airman_turtle]

well what about head flow, i think my heads flow around 240-250, is that good?

Also, what is a safe RPM to take the 200-4rs to? i do have it built, but not the hard parts. I know they are metric, and ive been told they are kinda weak for higher horsepower.

[killerformula]

I'm telling you man, you push that stock 350 bottom end past 5500, maybe 6000 RPM and you're asking for a stretched rod and a hole in your pan and block. Get a cam that allows you to shift at 55, maybe 5800 or buy a 2000 dollar bottom end for the thing. Sorry man, but those are your options.

The transmission will twist till the cows come home. WOrry about the mill.

K

[airman_turtle]

i have heard that, but my mechanic has a 350 with a stock bottom end in his el camino, and he has had it in there for 5 years...It has well over 600 passes on it and...he shifts at 7500! He told me they have been tested to 9200 RPM, but he also said that even with his, he had to have the tolerances damn near perfect to allow the RPMs that he gives it.

[killerformula]

Well as long as its his money and his motor, that's cool. YOu just have to decide if you're comfortable doing that to your motor. I will tell you I've never in my life heard of a small block with a stock bottom end doing those R's more than once. You'll need performance springs, pushrods and girdles to push those R's. A stock setup simply will not do it.

Just be careful man, its a rough thing to blow up a new motor...

K

[airman_turtle]

oh i dont want to go that high, but hes telling me to shift at like 6000, i honestly dont feel any more power past 5500-5800 though

[gpeak]

Originally posted by airman_turtle
not much HP gain, but getting 20 lb/ft from an intake is pretty impressive.

The Performer RPM air gap or Weiand Stealth and a 750 BG should make considerable gains.

[mytwopals]

Check out the following link: http://javascript.internet.com/calcu...orsepower.html

With a 3500 lb. car and a desire to hit 12.0 in the 1/4 mile, you'll need 400 horsepower at the rear tires. This translates to approximately 520 HP at the flywheel.

Based on your engine description, your at least 150 HP shy of your goal. If you want the car to remain streetable, you're not going to get down to 12.0 in the 1/4 mile. You'll need a much more radical cam, taller intake and about an 850 CFM carb. You'll probably want a forged steel crank, too.

Reduce the car's weight to 2600 lbs. and you'll get your 12.0 ET with your current engine setup. Start by removing the back seat. That should get you almost 100 lbs. lighter.

[53LEDSLED]

im not an engine expert but what about NOS???