Whats up everyone?? Quick question did the 69 vette come with the hydraulic cam engine???

Can i use it with my TBI computer with a modded chip???

Thanks for looking everyone.

Thanx
Dan

 

That would depend upon the engine installed. There were several options in the Corvette line. Most cars had hydraulic lifters, some were solids as late as 1969.

 

1972 Z28 Camaros had solid lifter. That is why you could not get A/C with a true Z28.

In 1973 all v-8 got hydraulic lifters, and then you see 73 Z28s with A/C.

 

So if the engine is of that option with the hydraulic cam, can it wourk with the computer for a TBI unit with a modded chip. Any help would be wanderful.

Thanx
Dan

 

Good call. I don't know how I could have forgotten the '70½ Z-28 - that should have clued me right away. DU-UH!

As for the TBI on an older 350, as long as you are writing a custom PROM, it really doesn't matter what you have. You can program the detonation sensor so dead to the point of nearly ignoring it, so noise from solids, a gear drive, even a loose rod wouldn't matter. I'd be more concered about the cam grind than the lifter design. If the grind doesn't support good idle vacuum, you may have some "creative" fuel maps. Still, if you are writing the PROM, the sky is the virtual limit as long as the hardware will support it. The ECM is going to be looking for O2 inputs, some TPS voltage, MAP input, some system voltage, a fuel pump relay coil, a distributor reference, vehicle speed pulses, a coolant temperature, maybe an ESC feedback, possibly a BARO sensor, and EGR solenoid coil as a load depending on the ECM firmware. Got a good basic binary file to start?

 

when in doubt, all i have to do is ask you Vader, thank you so much. I am not going to be doing the chip burning, a guy i know is. One more quick question though, can i use a LT-1 camshaft in the 69 hydraulic block, cause i have an extra one laying around and want to throw the stock one out. (rebuild kit cam). Well thanks so much and take it easy.


Thanx
Dan

 

The LT1 cam (at least the 1993-1996 LT1) won't have a fuel pump lobe, but the rest of the dimensions are the same. The later version LT1s are also hydraulic roller cams, so don't plan on using one with flat-tappet lifters. You should also use a low-friction distributor gear (like a bronze or sintered iron one), since the entire billet is harder with the roller cams.

If you are talking about the early version LT1 (from the early '70s), that is an ideal cam for that engine, at least in terms of material and compatibility. The lift and duration are your call.