06-21-2012, 12:44:57 PM
OK, I have a '78 Z28 with 383 stroker the block is a '71 LT1 the cam is a .488/.488/.232 with 1.6 roller rockers which I think buts me about .510 lift/exuast with around .250 duration. The heads are aluminum 52cc chamber, air gap manifold with a 650 Holly dbl pumper. I believe I am running around 11.1 compression. Trouble is car doesn't seem to have as much power as I think it should... I considered a supercharger but I think my compression is to high to do that. Due to the fact that I only get to drive it every few weeks, the carb leaks down and its a pain in the ass to start, I would have preferred to have a fuel injection system but could not pull it off financialy before. So my question is this am I better off buying a crate motors like an LSA that comes complete with fuel injection and a supercharger or pull this motor tweak it and make it compatible with a fuel injection system and supercharger? Point is I wanna have an open road Corvette killer with less drag racer feel to it... thoughts please
06-23-2012, 07:36:02 AM
You must have a lot of disposable income. Which then means you're single and living at home with mom and dad ;) You can put all the motor you want in a car but if you have the wrong transmission/rear end gears (based on what you plan on doing with the car) it's not going to make any difference.
p.s. a 650 seems a little too small for your engine if you indeed have that much lift/compression
06-23-2012, 08:01:04 AM
.488" lift and 232* duration with 1.6 rockers would give you .521" lift and about 234* duration
06-23-2012, 09:18:16 AM
@Ls777z, I wish I had more then I do...and unfortunately I no longer live at home...lol I am 40 with 7 kids... but I have had this car for the last 20 years or so... I guess I was not super clear I would also be connecting it with the corresponding trans at best my hope would be 6 speed but it depends on what works out. Right now the car has a 3.73 gear., As far as anything else goes I will be selling my Harley to pay for a portion of this. Plus I haven't spent anything, yet...that's why I am trying to get advice first. And going back to your 650 carb seems small, I have had bigger on and always seemed to run really rich, now I suppose the carb could have been set up wrong but seems at least a little better with the smaller one.
06-23-2012, 10:44:35 AM
7 kids ...:eek: :eek: :eek: :eek: :eek: :eek: :eek: ..at least now we know why you don't have the time to drive it. Seriously, before throwing some more $$$ at it try and figure out exactly how you're going to use/drive/race the car. I don't know how you're judging that it doesn't have the power you think it should. Stright line performance ? Curvy stuff ? daily use/MPG ? The only thing I would worry about fuel injection is $$$ and the tools and knowledge to set it up and then keep it performing like it should. Carbs are pretty basic.