Quote:
Originally Posted by Rannos
I would use a cam cut for EFI if you are set on running TBI. This will serious limit what you can get out of your motor and with just about any cam upgrade you will need a chip to be burnt for your computer. By the time you get a chip burnt and pay for a TBI intake you could have easily bought a carb and intake.
If you still want to stay with TBI I'd run the comp cams 268XFI HR13 if you can afford the retrofit hydraulic roller set up. If you want to stay flat tappet run the 268XFI H13. The cams you mentioned are cut on 110 LSA and are harder to get to run with EFI. These 2 cams are cut on an 113 and are more EFI friendly. Not to mention with a wider LSA they should have more vaccum at idle.Typically most mild EFI cams are short durration & high lift. The reasoning behind that is you get the most of the shorter time the valve is open by having the valve opened by a larger amount and lift does not effect the computer like durration does.
When selecting your cam keep in mind what heads you are going to run. A set of stock Vortecs will only handle .480" of lift. With springs and offset retainers and locks you can get up .525" before needing to machine the stud boss. That is another reason I would look into the EQ 180cc or the Dart Iron Eagle 180cc. Both are good heads and they have more clearance for a little more lift. Not to mention that they are not much more if not cheaper then buying a used set of Vortecs, having a Valve job and what ever machine work you need done. I have seen brand new EQ 180cc heads set up for .550" lift cams for $550-$700.
When you do all this don't forget the simple things that help like a decent set of roller rockers and good set of headers. a decent stall convertor. even someting as small as a 2200-2500 converter would make worlds of difference in the performance of the truck. IMO a decent convertor is one of the best upgrades you can do to a stock to mild truck/car.
|
ok so to go carburated all i have to do is change intake manifold and get the carb?then what i can cam the motor and have no computer issues?