In a 1982 Z street/strip car I have a 1970 350 that is now a 355 w/9.25 comp. ratio, 1970 #041 p&p heads Z28 valve springs and steel 1.6 roller rockers HEI ignition ,650 holley double pump carb mounted on a edelbrock torque 2 manifold, the current cam is a hyd. 465/488 114 lobe cent. generic grind and all this is mated to a turbo 350 w/manual shift kit 3000 converter and 410 gears and dr's. Now the question, what would be a killer street/strip cam for this combo be it hyd or solid with the hyd cam being my first choice and why, thanks

 

3000 converter? you're looking in the 230* @ .050 area as of what i've heard, i was just getting some cam advice recently and Lunati's bracket master II is my choice. My reasons are... lumpy sound and since a guy on here was telling me how much he loved it when he ran it, and pulled 12.7s in his 3rd gen with 305 heads opened up for the big valves. I figure my vette heads should be even nicer.

I decided on going with the 230 @.050 ( summit pn LUN-00010LK ) with an extremely similar setup, in an 84 firebird 9.3-1 355, polished 487X heads (original LT-1s) 750 holley, weiand xcel intake, headers, mallory ignition, 2700 area stall and 4.10s. and I too expect to pull 12s, with the gears and stall you could go with the next level up but yea if you want to look up the old thread it's only like a month or so ago labeled like sbc cam er something like that

My concern is your 650 holley, that baby is gonna need to breathe and i dont know if 650cfm is gonna cut it, you probably will need a 750 to feed her above 5500. Since with the heads, gears and intake, you'll pull hard to 6500 if you get the right cam...

anyway, that's my two cents,
Josh

 

i had comp cams xe 274 cam/lifters set(it was a flat tappet in a early 70's 4bolt)and it was.487/.490 lift and 230/236 duration,with the car running sh!tty with hardly any tunning it would still light the tires for 50ft before id let up, so get something in that range and id say youd be looking pretty good.

 

A good street/strip (more street than strip) would be a 230-ish cam that has a powerband from 2500-6500. Lunati does have some bracket cams that look real good,im trying to convince my buddy to throw one in his Vortec 350 monte carlo.

If your looking more into strip than street,than an RPM range of 3,000-7,000 is more what you would probably want.

 

I have this same spec cam. I run 1.6roller rockers, 3000 stall, 650 double pumper, edelbrock victor jr intake and 3.73 gears. I shift at 6200 rpm. with this combo my current best et is 12.41 @106.7 with a 1.65 60'

 

Do it..........get that one haha...no its a hard process, i went through it to before i got it, and it has a pretty nasty sound at idle for a daily driver...

 

oh yeah, my car is my daily driver. no drivability issues whatsoever. I set the idle at 750rpm. could go lower but it really gets to rumblin.

 

mine was just over 600......

 

ok i feel a competition coming on, who can get their 350 to idle he lowest, and still drive it down the street without it stalling out whenever they hit the gas from a stop?

 

even at 125% efficiency (blower or turbo), 650 is more than enough carb for the motor. it's not just about the size of the hole with carbs, but the way it's jetted, what power valve it has, etc. imho, a 650 holley is more than adequate for this setup.

 

check out the Lunati Voodoo cam line it looks pretty good

Wade

 

Thanks for the help guys and the winner is Comp Cams Pt#12-213-3 thanks again, 82

 

i have a 86 tpi doing a rebuilt want to put a street cam in it to make a little sound does anybody know what would be good

 

Idle war: my 388 was at 650rpm when I set it up for street driving and then gets bumped upto 1200rpm for racing since it's easier to bump into the lights.

Carb size has alot to do with how your morotr will run. NEVER expect to get any performance out of a VS carb, it wont happen for the common tuner.

When looking for best ET/mph at the track, dont fall victim to "that carb is too big". Everything all these magazine tuners read-you can throw out the window when going to the race track looking to go fast.

Ex: When 84Firebird and I were discussing cam options for his mill it was based off my old 355, 9:3.1 compression, Lunati Bracket master II .480/.480 lift cam,high rise dual plane intake, TH350 with 3500 stall, and 3.43 then later 3.73 gear with 27" tires. ANYWAYS I started with a 600VS, then progressed in this order-650DP, 700DP, 750VS, 830DP, then my 950HP. Even though all the magazine tuners said I was way over carbed there was an increase in EVERY incrementals from start to finish with every carb size jump. with best numbers coming out of the Holley race 830DP, the 950 wet flows the same cfm as the 830 so only gains I saw were imporved consistency.

gas milage naturally decreased since bigger carbs require bigger jets, and I rarely babied it, so if it's street driven 90% of the time, get a small anemic carb since your wallet will thank you, but when you get ready to lay down some numbers-go big and go DP!!


Wanna know the funny part-my "oversized carb" it ran excellent on the street and still does. Dont fall victim to magazine rumors when it comes to going fast-ask the guys that do this for the real information. I've spent alot of money testing on my own crap putting alot of these magazine rumors to bed.