Computer cam and a carb
08-20-2006, 08:05 PM
#1
Senior Member
Thread Starter
iTrader: (5)
Join Date: Mar 2004
Location: Richlands N.C.
Posts: 574
Likes: 0
Received 0 Likes
on
0 Posts
Car: '92 RS
Engine: 350 carb'd
Transmission: T-5
Axle/Gears: 4.10
Computer cam and a carb
Ok here is my situation. I started my cam swap in march 
To make a long story short the TPI is just pissing me off so its getting replaced with a carb. I just put the Summit TPI cam in kit in and i wondering it the car will run worth a crap with the computer controlled cam and a carb. Im not lookin for alot of hp , just wanna get it running so I can drive it a bit and then sell it. Anybody run into problems with this?? hoping it will work cause im trying not to by more gaskets and another cam 
To make a long story short the TPI is just pissing me off so its getting replaced with a carb. I just put the Summit TPI cam in kit in and i wondering it the car will run worth a crap with the computer controlled cam and a carb. Im not lookin for alot of hp , just wanna get it running so I can drive it a bit and then sell it. Anybody run into problems with this?? hoping it will work cause im trying not to by more gaskets and another cam 
08-21-2006, 01:31 AM
#3
Supreme Member
iTrader: (5)
Join Date: May 2001
Location: Naples, FL
Posts: 1,055
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Firebird
Engine: 383 stroker
Transmission: T-56
Usually "computer cams" just come with somewhat conservative profiles like not so radical durations and wide LSA's for less overlap. Llike mentioned, it should be just fine, and probably a little easier to tune.Tom
08-24-2006, 12:32 PM
#4
Junior Member
Join Date: Aug 2006
Location: Poquoson, VA.
Posts: 4
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1978 Camaro, 1990 Camaro
Engine: 406 in the '78, 350 in the '90
Transmission: TH350, 700-R4
Axle/Gears: 3.42 in both
What are the specs?? You can usually go as big as 215 @ .050 duration and as narrow as 112 lobe separation and be safe.
08-24-2006, 02:14 PM
#5
TGO Supporter
Join Date: Oct 2002
Location: Saskatoon, SK, Canada
Posts: 9,067
Likes: 0
Received 1 Like
on
1 Post
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
The only real difference between a 'computer cam' and a comparable 'non-computer cam' is that the computer cam usually has alot wider LSA to kill off alot of overlap, which tames the cam's idle/low speed characteristics. Computers get confused by cams with really short LSAs and lots of overlap, unlike engines with mechanical fuel systems, like a carb, which doesn't really care, but will just run a little rough. Thats where the 'rumpity-rumpity' idle comes from with a big cam with a carb'd motor.
08-24-2006, 02:39 PM
#6
Member
Join Date: Sep 2000
Location: Crestline,OH
Posts: 464
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1987 Formula 350
Engine: 6.0 boost and smak
Transmission: 4l80e
Axle/Gears: 9bolt 3.27
if you really want to know why? If you have alot of overlap there is alot of oxygen going straight throught the intake valve, right out the exhaust valve (at low rpms) OXYGEN SENSORS are pretty dumb and think that the engine is way to lean (to much air in the exhaust)...
this is important if you tune your CARB TOO... tuning with the oxygen sensor is still the most effiecent way fo tuning an engine....
on the same note, the old school way fo tuning a carb'd/cammer will still work well in TPI/LT1/LSx's.... run rich and lean it out till you loose vacuum at idle... and tell the computer to shut up, and listen
this is important if you tune your CARB TOO... tuning with the oxygen sensor is still the most effiecent way fo tuning an engine....
on the same note, the old school way fo tuning a carb'd/cammer will still work well in TPI/LT1/LSx's.... run rich and lean it out till you loose vacuum at idle... and tell the computer to shut up, and listen
Thread
Thread Starter
Forum
Replies
Last Post
