i already posted a topic on my engine's performance and am looking for a little bit of more details on the cam and intake to go in it...i have a 350 in a 69 ss..it is more street than strip but still like to play. it is a 4 bolt main block bored 30 over. not sure on bottom end parts. i have world product stock replacement heads.1.94 valves 64cc chambers. holley 670 street avenger carb. msd 6al box w/ pro billet distb and blaster 2 coil , single plain intake and no idea of cam.the person i got the car from didnt know either. i have a turbo 350 trans w/ 2200 stall and b&m transpac. hooker super comps and 3" flows i am running 12 bolt rear w/ eaton posi superor axels w/ 3.26 gears. i cant seem to get into the 13's and some people suggested an intake and cam swap. they told me the performer air gap manifold w/ comp cams high energy cam..would do the trick .like i said i have no idea of the existing cam but it is very mild w/ a little lope to it. what would be a good cam w/ more performace but still streetable. i want to match the cam as much as possible to the heads and carb and the air gap manifold i look to buy. i would also like to replace my rockers to go along with the cam. can any one suggest a cam w/ the duration and lift along with some rockers to put in my motor to help me get this beast into the 13's while keeping it a daily driver. sorry for the long post

Go with an early 70's Chevy LT-1 350 package-

Z/28 copy maniflod like the RPM manifold (Victor JR works great also if you have headers and gears) with a Chevy cam or Crane Muscle Car cam

3863151 Hyd. 221/221 .447"/.447" 11.0:1cr 114 327/350HP L-79

12353923 Hyd. 224/234 .465"/.448" 9.5:1cr 114 GM/Crane off-road

3972182 Mech. 242/254 .459"/.485" 11.0:1cr 116 '70 LT1 360 to 370HP
Same cams as above but w /lower cr-9.0:1cr 116 71 LT1 330HP

I would go with no more that a good old CC 270 Magnum IF you are up about 10 to 1 CR??

pdq67

PS., and I daily drove a -151 cam in my new 295hp, L-48 motor Camaro for several years after 1,200 miles!!

-151 cam, EXCELLENT, EXCELLENT, EXCELLENT even if it is old-school b/c I loved my mid of second gear to top of third gear charge, thats why I mentioned to 270 Magnum b/c it is modern even if it is beginning to turn into old-school too ...

BUT ya gotta be up at least 10 to 1 CR. to run the old -151 cam!! AND preferably 11 to 1!!

First thing that hits me is your rear gears. Small blocks like to make revs so they need some gears. I think if you put a bigger cam in, you will be disappointed unless you also move to 3.73 or maybe 4.10 in the rear. If you had super torque from a big-block, then 3.26 rears would be OK, but the SBC needs to rev.

I think you should do a cranking compression test of your engine to get a "ball park" feel for the compression ratio. Installing a larger cam will give you less cranking (dynamic) compression, so be careful. If you only have 135 psi cranking compression now and you put in a bigger cam, then your engine will be a dog. But if you have 180 psi, then you can maybe move up to bigger cam.

I have been playing with these engines and combos for 35 years and I would recommend caution and a LOT of careful planning. It's real easy to spend a bunch of money on speed parts and fancy items, only to have the car be SLOWER than it was before. Performance-tuning a car is a balancing act, the parts must all be able to work efficiently with each other to realize any substantial gain. Changing out any one part may have a positive, or negative, influence on the rest of the vehicle.

Mine has 3.31's and I'm here ta say, her third gear charge was GREAT!!

I honestly figure 3.31's are just about the best all-around gear you can have!!

Wish they'ed re-pop STOCK ones...

pdq67

hi guys this is an old post but i have talked to comp and summit and they told me to go with the comp cams xe with 269 intake dur 280 exhasut and the lift is 477 intake and 480 exhasut the part num is 12-242-2 anyone out there running these and i heard they were noisy...would this make good power with my edelbrock intake that i have on the way and along with the other mods on my motor

Like I said, if you are up right about 10 to 1 CR. like the old 295 and 300hp/350 motors are, a good old CC 270 Magnum or an Isky 270 Mega will do you nicely, imho...

pdq67

The XE268 is an excellent cam for your setup, but they do tend to be a bit noisy. The DEH275 comp cam would be as good if not better (and quieter), as would the 270 magnum, isky 270 mega, etc.

what are the prices on those and which is the best for performace/daily driver..i can get the xe for 169 w/ lifters

All the Comp grinds should be around the same price. The Magnum 270 is the same price. I think the biggest performance mod you're going to fell is gettng rid of that single plane intake. The Performer air gap should help your low end torque. The Comp EX series of cams is designed to build greater cylinder pressure that'll help your low end to midrange as well. I also agree that if you can afford it 3.73 gears will definately help out.

yeah i know i wanted 3.73 but my dad vetoed that when i had it rebuilt a few years ago he said gas was too much and my car was fast enough so we went from 3.08 peg leg to 3.26 posi which was still a great gain to me ..but later on i plan on it... so the comp 268 xe is a good choice and i ahev another post about my rocker help maybe a set of rollers or summits stamped 1.5 ratio one will help out a little

The Comp Cams XE268 is a good choices for your motor. These XE cams are capable of good mid range power and great torque. If your thinking of going with the deeper gears in the future, the 274 might be a good choice. As for an intake, the Perf. RPM Air gap is a great choice. We recently built my buddies 350 (.040 over) with dart iron eagle heads, 274 cam, 670 holley street avenger, and it made well over 350 hp / and 400 ft lbs of torque, with mild 9.5:1 compression. And with a holley 750 double pumper we tried, the numbers screamed up to 400 hp and 410+ ft lbs of torque. We were orignally going to use the 268 cam, and opted for the 274 in the end. This motor had larger valves, as well as deeper gears and 2400 rpm convertor, so as comp cams suggested the 268 is probably a wise choice for your car. A good budget rocker arm that will probably work well are comp cams magnum roller tip rockers, they are similar to a factory style stamped rocker, but incorporate a roller tip and larger slot for the higher lift camshafts. Also make sure you tune that pro billet distributor advance curve, have full advance come in around 2000 rpm or so the car will be nice and responsive. Good Luck

how much is the cam u are talkin bout
and is it good for a daily driver and get decent gas milage

how do i tune the advance to come in around 2000 like u said...thats a field im dont know much about but would like to learn more

Just for your info I ran almost that exact set up before I blew it up. "Intentionally"
Stock bottom end.
Stock fuellie heads reworked to 2.02 & 1.6 valves 65cc and pocket ported. Comp Xtreme Energy XE274H cam.
Holley 4160 600cfm
3.28 open rear
TH350 2200 B&M holeshot and shift kit
Ran very stong till 6k I had some traction problems with the open diff. had the 12 bolt rebuilt with 3.73's and posi
Got to low 13's

Your MSD Pro Billet distributor has the option to adjust the mechanical advance, there are different springs and bushings you can buy and change on the advance plate and weights underneath the rotor, to adjust the advance curve. If you have an MSD owners manual for that distributor, that would be the easiest way to see how to do it, as well as it would tell you the correct parts to use to get the advance where you want it. That motor will probably be happy around 35 degrees of total timing, and with that cam, having the advance coming in soon in that 2000-2200 rpm range helps to take advantage of the powerband that motor is going to produce. Heres a link to MSD that explains what I meant :
http://www.msdignition.com/dist_mechadv.htm

Also I know with the 274 cam and the 670 carb, my buddy has gotten some decent gas mileage, with highway driving in the 13-14 mpg range..
The Comp Cams XE268 is a hyd. flat tappet cam so the price isn't that bad at all. Im pretty sure summit has a cam and lifter kit for under $200.

A good option to Comp Cams 268 is Lunati's Voodoo version. Supposed to make more power and be easier on the valvetrain with less noise ta boot.

"60103LK 268/276 227/233 .489"/.504" 110/106 Hyd/Hyd 1800-6200
60103 Description- Hydraulic: The most awesome "268" cam ever produced Out-powers all others This High Performance street cam likes 2400 RPM stall, 700 cfm carb, dual plane intake and headers. Makes un-equaled power to 6200 RPM with proper valve springs. "

what kind of power gain would i be looking at if i go w/ the comp cams xe 268 and the air gap manifold..right now as is i cant get into the 13..last time i ran it was b4 i installed the msd stuff and in the heat of summer..i went 14.3....i know this car is faster than that..i hope this cam and intake will help me do that ..maybe even some rockers if my budget permits....any ideas