Corey_68

I'm thinking about installing the Comp cam grind 294S @.50 248/248 .595/.595 110 lobe sep.

This cam is to go in a 468ci w/ 2.19 rectangular heads.
This car will be 75% street and 25% tack, it is NOT a daily driver but will be driven several times a week. It is too much? I will install a vacuum canister to run accessories.
Thanks

Gordonm

Can't say for a big block but I am running the same cam in my small block. I think it is great, not a whole lot of bottom end but from 3000 on up hold on. You should have a fairly good bottom end if you plan to wind it up to 6500+ rpm a lot. Make sure you have headers a good intake and some gears to go along with this combo. What transmission and gears do you plan on running.

Alwyn678

Sounds awesome to me..With the 4speed what are the gears??.... :cheers:


[Modified by Alwyn678, 1:34 PM 1/28/2002]

Bob Turner

Check with forum member Bence_13_33 on this one. He is using this cam with his BB!!

Bob :cool:

norvalwilhelm

Mine is 244@.050 and 623 lift and I find it very mild with good idle vacuum. For a 468 it is not too wild, for a small block it is alot of cam. I pulled a 256, 264@.050 and .638 lift out with 108 lob centers. Loved that cam but it had no idle vacuum but alot of mid and upper range. If I didn't have so much money in the milder cam I would go back.

bence13_33

I don't have the cam yet, but I will be running the Comp Cams 294S solid lifter cam with my 468. I've been told that this cam is way too big for my setup but I want to try it out for myself. The nice thing about a big block is the more cubic inches you have the tamer a cam becomes. The idle with this cam should be nice an lopey :yesnod: . I won't know what this cam feels like until spring time when I drop the big block in the 'Vette.

69 N.O.X. RATT

That will be a wicked street / strip cam if you have have the gears to make it work. I would think something in the order of at least 3.73's or better yet 4.11's. I am running a solid roller with similar characteristics of the 294, a lot more lift a little less duration. That cam will sound AWESOME at idle. The only draw back to the rollers is they have a little smoother idle, still radical, but not like a solid flat tappet. :chevy

mountainmotor

A GM rectangular port motor lends itself towards the use of a dual pattern camshaft especially through mufflers due to the intake to exhaust ratio.A large valve GM oval port motor with port work reacts in near the same manor but it does not want a 10 degree spread.

A situation I would run a single pattern cam in a street BB would be automatic and 3.36 gear or less

4 spd would be dual pattern with either head. Less duration spread with the oval ports.

Dual pattern- auto trans-3.55 up gear


[Modified by mountainmotor, 7:52 PM 1/28/2002]

Corey_68

Well for now the motor will be backed by a built Th400 with a 2500 stall while my 4 speed is being rebuilt. I will later switch to a the T56 6 speed.

mountainmotor

What is the rear gear ratio?

Corey_68

I plan to run a 3.73 ratio.

bence13_33

mountainmotor:
I thought the whole point of a dual pattern cam was to compensate for a restrictive exhaust or poor flowing heads?

QuickVet

i think that cam is to small unless it is just going to be a daily driver. a few of us have a cam that size in our small blocks and have no problems on the street. if you motor could clear more lift and duration i would go bigger.

Corey_68

I agree I COULD go bigger, but I do not want this to be my race car. I plan on driving this car 2 to 3 days a week and will be in city traffic at times. The duartion is somewhat radical, but I agree it could use some more lift.

GDaina

Am running the same roller cam as Norval, .623 lift...love it for all around street use

mountainmotor

bence,

Did you read my first post?

"A GM rectangular port motor lends itself towards the use of a dual pattern camshaft especially through mufflers due to the intake to exhaust ratio"

Camming any motor should be done on a "one on one" basis.I do not use many "shelf" grinds for that reason.Without typing a small novel the potential for a single pattern cammed Big Chevy to get freight trained by a dual pattern cammed street car @1/2 track is very good.The flow in the intake port will "Wall" and the motor will not RPM in certain applications.This is just in general now.The nature of the intended use will vary from motor to motor gear to gear and transmission ect.The BIG problem with helping with cam questions on the forum is simply not enough information.It would be far easier to have the needed info-come back with a cam and maybe two other choices and briefly explain the benefits.There are others that are far better at posting than I.

In all honesty,your rear wheel hp might be a little disappointing when the motor is installed and running through mufflers..However I bet your car will run well and be very torquey and is a good match for your rear gear.

Engine dynos were not meant to be raced...They are short and would wobble at the big end of the track :)

mountainmotor

A quick example of what mufflers to to a single pattern cammmed BB.

468 ci Jet Boat rectangular port heads
262 duration @ 0.50-.648 lift
115 mph trap speed

insert Basset twisted mufflers"auger style" in the end of the collectors and boom!
109mph.
Rejetting would give back maybe 1-2 MPH

Would be far worse in a car through mufflers as opposed to open headers.