super chevy

I've been reading some of the posts for cam choices. Most seem to be for maximum horsepower/top-end. My 350 tbi will rarely if ever see 5500 rpm in my '93 Silverado. I just want more grunt than the factory cam is supplying. I've already put on an open element, shorty headers with cat-back duals. I want to upgrade the cam, get a vacuum referenced afpr, edelbrock intake, and chip. Thanks for any suggestions. SC

steve8586iroc

Sounds like it's time to check into an RV cam. These are made for pulling trailers and hopping up motor homes.

super chevy

LOL! I've never seen a cam pull a trailer, nor a hopped up motorhome!
SC

fast_broker

iTrader: (1)

IMO, you won't need a vac ref'd VFPR for a motor like that. Just my view.

I guess the question is do you want maximum PEAK torque or maximum AVERAGE torque?

super chevy

Geez, you guys are way to technical. What am I going to do, drive around at peak torque rpm on the way to work?
I already know what cam I'm going to run, just was looking for some opinions from other board members who might have the same/similar combo's on their trucks.
As for the vacuum referenced afpr, I'm still going with it. Good for any later mods I might do, and the price is right.
Later, SC.

NJ SPEEDER

what kind of rpm do you pull at the speeds you regularly tow?
most cams that will give you increased power (at least anything you can feel) are gonna raise the rpm at which your peak torque occurs.
the cam i woudl recomend for a 350 with mild intentions for top end power is the same thing we have been talking about, the stock LT1 cam. it will deliver a huge gain in peak torque, your new peak torque would occur around 3400rpm, and a large gain in top end power, peak around 5200rpm. the cam would also produce a much higher average torque and a flatter torque curve(more area below the curve)
it can also be installed without any other mods to your truck, although a edelbrock performer tbi and some new valve springs woudl help.

hope this helps

later
tim

bigvic

Since your 93 truck did not originally come with a roller cam, you would need to get some roller lifters (and a spider to hold them in place), if you decide to use the lt1 cam. Your block should have the provisions for some stock roller lifters so a set out of the junkyard should work if they are in good shape.

AJ_92RS

Uhm, Mr. Speeder,

The LT1 cam is a roller cam, right? Well super chevy said that he's puttin' it in a 93 Silverado. Those engines didn't come with roller cams from the factory.

The blocks can easily be set up for a roller cam, but then you gotta figure the added cost of new lifters, retainers, the spider bracket, and the thrust plate, if not a cam button. Then you gotta realize that the stock valve springs in a truck don't have the required seat pressures to accommodate the ramp angles of a roller cam. They're flat tappet springs. Weak.

Just my 2¢. Unless of course he's done all that or is using a different engine?

Anyway, super chevy,

What cam are you gonna use. Tell us, then we'll tell you if it sucks or blows.

You make this seem as if it's a test of our knowledge, opposed to advice from us.

AJ

Edit: I was typing this while he (bigvic) posted his

fast_broker

iTrader: (1)

If you are rarely/never going to see 5500rpm and its a 350 TBI, I'd go with the flat-tappet XE250-12 or XE256-12 cams. Very nice cams, tons of torque and you OEM PROM will surely work with the XE250, FP changes and perhaps more for the XE256 but no vac ref'd FPR necessary.

That XE250 (maybe 252 in the 112LS version) will pull you back in your seat. I am a fellow truckster, myself, so I know what you are looking for. The XE250 can get you 325-350hp in a really well setup engine. 300hp max in a not-so-well setup, OEM setup. Need 9.0:1CR min, IMO, for both of thee cams. A spring change will surely be necessary, too.