rpm cam question
03-17-2013, 11:57 PM
#41
Pro
IMHO A cam swap to the B-body cam by itself won't net you much, if any, seat of the pants difference over stock. If you want more low-end you probably should look at First: more gear, Second: more displacement(stroking the motor), Thirdly: more cylinder pressure(compression). I used to have an old 77 Caprice with a mild 350 in it. The best that car ever ran with a small block is when I threw some 305 heads on that 350. Small 58 cc chambers upped the compression and the small runners kept the velocity up but it ran out of breath at 4500 rpm. Sounds like something to consider from what you are wanting.
03-20-2013, 05:14 AM
#42
Racer
Member Since: Nov 2004
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Here's a my setup sum'd up. I'm stock with some weight shedded, 1.5 rollers, ported plenum,base and some porting on the runners, 3.07 rear, rebuilt distributor witha accel coil, rotor, wires and plugs, delet ac n smog pump. Stock cam. I'm tryin to keep it as a baseline but stock
Happy to be corrected, tho'...
03-20-2013, 07:56 AM
#43
Safety Car
Absolutely not, you will loss performance not gain. A cam designed to pull from idle to 3500 is the same cam that will pull from 1500 to 3500. The stock cam you currently have in your car is designed to pull to 4500 rpm and work well with the TPI. The TPI is designed to work really well in the 2500 to 4500 RPM range, outside of that range the runner length actually works against the power of the engine (tuned intake vs. anti tuning). Which means you do not want a smaller cam that operates in a lower RPM range because you will be outside of the operating range of the intake. In other words you will not have more low RPM power and once you hit the operating range of the intake you will still have less power. Remember you have a 1500 RPM or higher stall speed on your torque convertor so trying to gain anything below 1500 RPM is pointless, the second you hit it the engine will be at 1500 RPM or higher. If you want to make a meaningful cam change that increases low end power and mid-range power pick something like the ZZ-3 cam from GM or ZZ-9 from TPIS on duration and timing specifications but with less lift so you do not have to cut your valve guides.
03-20-2013, 11:10 AM
#44
Team Owner
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St. Jude Donor '05
Change your rearend gears
Get a bigger converter
Like a 2800 for the TPI...some like a touch less
that will definitely get you the feeling you want
Do that first...you may wind up with a bigger cam later.
Cam bjanski listed work well
Get a bigger converter
Like a 2800 for the TPI...some like a touch less
that will definitely get you the feeling you want
Do that first...you may wind up with a bigger cam later.
Cam bjanski listed work well