RJF

Put it in had it tuned broke everything in good then took it to the track best run managed was worse than before i had a cam only got a 12.51@105 with a 1.76 60 ft what in the world would cause it to fall on its face like that Need ideas or info on what could cause this

RJF

the mph just isnt there anyone know what would help this?

foff667

iTrader: (2)

got a dynograph? or #'s and peak and all that?

RJF

no numbers at all besides a time slip Ive got to know whats wrong with this thing or im taking it out and going to stock and selling the car for a Cobra ive been nothing but disapointed with this car from the get go

foff667

iTrader: (2)

i would get it up on a dyno...see what kind of power its putting down, see if your getting knock, make sure your not making peak power at like 5500 rpms(off a tooth) er something like that...the mph is way low so id assume its not an issue with the cam itself but possibly install problem or engine problem at this point.

44mag

iTrader: (1)

check your knock sensors. it could be retarding you timing way back

ram-it

I hate to tell you to spend more money but you really need a tool like the Predator to see what your car is doing as you go down the track. If you know someone that has one borrow it from them. You can't do any tuning but you can at least check your spark/timing. Then you'll have at least a direction to head in.

RJF

would the preditor let me tune if I bought a brand new one what all would it tell me would auto tap be better or edit ive got to do something

Tranzor

You need to find out what kind of air fuel you're getting, as well as whether or not you're getting any knock... something is definitely not right. Either the setup is wrong (off a tooth, as someone mentioned), or the tune is wrong. Put it on a dyno, or at the very least take some diagnostics with a Predator or Autotap.

Also where are the shift points set at? If you're at stock shift points, you're leaving a ton of power on the table. You should have your shift point set at something like 6600 rpms.

SouthFL.02.SS

Something is waaaay off. Don't blame the cam unless it's ground incorrectly. More likely a tuning issue, or cam installed off a tooth as mentioned above, or lack of compression in a cylinder.

RJF

o im not blaming the cam at all on the street the car feel sick *** crap but it just didnt put the number down that i was looking for i went 12.2 without the cam last year but it may just all be in tuning is there anyway to know its off a tooth beside pull the timing cover back off

SS SLP2

iTrader: (8)

I do not think car woulld start and run as well as it is if cam was off a tooth
I think tuning be problem
with combo of same cam and lt' and homemade EDIT tune I cut .80 off my time
my .o2' Johnny

Jason 98 TA

iTrader: (4)

Was the tuning on a dyno? Have you checked all your grounds? Is the car throwing codes??

We typically see around 50rwhp gains with that camshaft. What year is the car?

RJF

the car is a 98 Z28 its throwing mult misfires,and and the air inlet temp sensor on both cant get them tuned out but I have no idea.Im thinking more and more aobut sending you my computer cause Ive got to get this right

RJF

well hooked an gm scanner up it appers my computer is fryed so now im looking to buy a 99 plus wireing harness and a 02 computer

VSGLS1

iTrader: (8)

That would be a big problem. Look for valvegod for PCMs.

RJF

throttle postion sensors the computers not reading air fuel mix its just an open mix no cycle on it air temp sensor not reading ac wasnt working now it is with the new computer we tryed so i know to get a new one now car. we put one of his spares in ran fine so I think the computer was causing it all time will tell have a brand new 98 computer coming from gm so will be testing it out

foff667

iTrader: (2)

hehe kewl deal glad you found your issue

RJF

yeah i will have to admit though i went to the track the day before and off the line it was bad pulling both tires 6 to 7 inches off the ground.after that run the laptop showed it then we put his spare computer in and found out my computer really wasnt doing anything