cam quest
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Re: cam quest (DADDY D)
The stock computer is pretty good about making the car "run" with anything you throw at it. Sure it'll lope around and overall sound pretty nasty, but it will eventually learn how to make it idle and such.
The problem is with the rev limiter and WOT tuning. At part throttle the computer will try to correct to the proper A/F ratio within it's range of adjustment, so that's usually alright.
There isn't a magic cam size in which the computer won't let it run, there are too many variables. With a very mild cam you might not need to change anything, but the more aggresive the cam the more you need tuning to take full advantage of it.
The problem is with the rev limiter and WOT tuning. At part throttle the computer will try to correct to the proper A/F ratio within it's range of adjustment, so that's usually alright.
There isn't a magic cam size in which the computer won't let it run, there are too many variables. With a very mild cam you might not need to change anything, but the more aggresive the cam the more you need tuning to take full advantage of it.
Le Mans Master
Joined: Oct 1999
Posts: 9,713
Likes: 3
From: Sachse Texas
Cruise-In I Veteran
Cruise-In II Veteran
Re: cam quest (DADDY D)
It may depend on the year of the computer and whether or not the car is a MAF car or not. In my '94 I had no problems running a really big cam as far as the computer was concerned.
Team Owner
Joined: Sep 2001
Posts: 62,154
Likes: 1,731
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: cam quest (DADDY D)
86's dont have rev limiters, GM made it like 10,000 because they knew the TPI would stop you well before you even got to 7000-8000rpm
The car will run, but you wont make near as much power without tuning.
The car will run, but you wont make near as much power without tuning.
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Advanced
Joined: Sep 2002
Posts: 91
Likes: 0
From: Johnson Kansas
Re: cam quest (DADDY D)
Crane makes a line of cams made to work with the computer. What they do is give you lots of lift without a whole lot of extra duration. The theory is you don't want to get the lumpity lump idle because the computer will see no vacume and not know how to act. Crane recommended the hottest cam for me since I was building a 383. I'm going to change it out because it is a total dog until I hit 2000 rpm. Part of my reasoning to go 383 was to get that extra bit of thrust at 1500. The next size down is supposed to get into the power band at 1500.