Originally Posted by MrScharfenberger
You really need to know the cam spec's and what pistons you have before you do anything. Planning the build is essential for positive results before you make the next move with different parts. If you have a low compression stock bottom end & a stock style cam all you are going to do with a bigger carb & Performer RPM intake is make it even slower.
What do you know about the motor? What did it come out of? Was it rebuilt at some point? Tell us what you know. Still too little information to give any good advice IMO.
Also if somebody put in a bigger Comp cam but did nothing to the bottom end then they may have already started going down the path of making it slower already. I'm not saying this did happen but I'm saying it could have happened. All parts need to work well together to yield positive results. Installing individual high performance parts with no regard for all the other parts most often returns disappointing results.
The short block was rebuilt with LF2404-.030 Pistons,
The heads were slightly ported on the exhaust port, Stud mount rockers , and machine work to pedestals for those, guide plates, new springs, stem cut for higher lift, and a valve job.
The Cam is supposedly around .570 lift at the valve with 1.73 rockers, that is about all that I could get out of the previous owner on the cam.
The car runs well for what is done to it, i have not driven it much, *had to order a proper length driveshaft*
It does seem to pull well up until about 5400, didnt get much time to get above that safely.. I suppose the perfrormer intake may be at the limit with the D3 heads and dish pistons, so the combo may work.
I do have a set of D0VE-C heads on the way, and will clean those up. They do have larger valves, but I believe they only cut the throats of the bowls when placing the larger valves in. So they will need port work, i joined the mad porters site to get guidance on that. I will make the swap this year if time ever permits...
I may just start gathering parts for those heads, and not worry too much about the current D3 combo, outside of getting a few baseline runs.
thanks for advice.