1SICK90RS

what cams are you small block guys running? i'm trying to get an idea for my 355 build, i want something that lopes pretty good, and still sounds good through the exhaust.
http://www.youtube.com/watch?v=9vXD6db2xPA
something like this ^^^

Jim85IROC

iTrader: (2)

We need way more information if you expect any kind of help.

What are the specs on your motor? Stock or modified? Heads? Headers? Carbed, tpi or something else? What transmission? What rear gears? And lastly, what are your goals? Do you just want it to sound fast, or do you want it to be fast?

1SICK90RS

here are the plans for the engine.
350 .30 over
scat 4340 forged rotating assembly with dome pistons and i beam rods
13.7:1 compression
750 holley carb (not sure)
patriot aluminum 64cc heads
edelbrock victor jr high rise intake
MSD ignition and components.

i want it to sound like a late model through the y pipe. and yes i will be running headers on it

i'm hoping for 450 horsepower through a 6 speed, and 4.11 gears
those are the plans and goals.

Jim85IROC

iTrader: (2)

What patriot heads? What size ports and what size valves? That all makes a difference. Lastly, why such high compression?

1SICK90RS

http://www.jegs.com/i/Patriot-Perfor.../2117/10002/-1

why not?

Jim85IROC

iTrader: (2)

Well, I guess I'l leave cam suggestions to the racers. I have no idea how to cam a 13.7:1 350 with heads that huge. I hope you're not expecting this combo to be streetable.

1SICK90RS

Yea, i just took streetability into consideration,and this engine must be streetable... What would u suggest for a cam head combo?

Jim85IROC

iTrader: (2)

If you want this streetable, you need to have manageable compression, heads with modest port sizes, and a cam to match.

For example, a set of good quality 180-190cc heads, flat top pistons, a dual plane intake and a reasonable cam in the 225/230 range will give good drivability, good power band, and good power.

lunati397

CAMS.... one in the engine and one in the back seat for security

Dakota W.

If it were me running a nearly 14:1 compression ratio engine I would just give a call to all the companies who produce cams for SBC's and see what they say/offer you.

1nasty86

iTrader: (5)

1SICK90RS

vetteoz

iTrader: (13)

To run that CR on pump gas you are going to need a cam with a long duration which will have a MASSIVE lope so all your wishes will be solved at once

Study DCR and it's effect on how a engine runs
http://www.kennedysdynotune.com/Dyna...ion%20Tech.htm
http://members.uia.net/pkelley2/DynamicCR.html
http://www.popularhotrodding.com/tec...eze/index.html
http://www.misterfixit.com/deton.htm

Don't forget importance of Quench
http://www.camaros.net/forums/showthread.php?t=124935
http://racingarticles.com/article_racing-10.html

It will be " streetable" all right
Just don't expect too much response below about 4000 RPM with 225 heads on a little 355
and a cam needed to run that CR on pump gas will idle about 1500 RPM

Jim85IROC

iTrader: (2)

And pull 6" of vacuum.

Orr89RocZ

iTrader: (20)

This has a shot at running on E85 with some tricks but not a snowballs chance at 13.7 to 1 on 93 oct.

Looks like your street car will run on VP 110 or higher.

Those heads/that intake, i'd go with a solid roller and shoot for 7000 rpm peak power. Problem is I'm not sure your rods will like that too much. I'd run an H beam with GOOD rod bolts. Likely a cam around 255-260 deg duration at .050. 110-111 LSA Mid high .600's lift. It will lope pretty hard but still will be driveable...is just that compression is too high for pump gas.

You should destroy 450hp at the motor and likely make that at the ground.

Jim85IROC

iTrader: (2)

Or just get more appropriate heads and a realistic cam.

redneckjoe

its not gonna be pump gas friendly, thats for sure.

i suppose if you run a BIG cam, you can bleed off some low rpm cylinder pressure because of the overlap. kinda sounds like the building of a full on race engine. for street use, id change to some flat top pistons.

Orr89RocZ

iTrader: (20)

Yeah I'd rather see flat tops in there and shoot for 11 to 1 compression or close to it and still cam it the same way...take advantage of the heads and intake. Its gonna need to spin up to make any sort of power to move the car. 355's dont make great torque, hence why most build 383's to move power band down. 4.11 gears will help but that thing may want 4.30's or 4.56's

Jim85IROC

iTrader: (2)

And let's not forget that if you're really going to spin the motor to 7k or 7500, that you're going to need one hell of a good valvetrain, which will likely exceed the cost of the heads.