I have a 79 280zx, which has a N-42 block and N-47 head, fuel injected,5-speed . I also have two parts cars, both having F-54 blocks and P-79 heads,one's a 5-speed, and one's an auto. My mods I have,or am planning are: Triple weber 40 dcoe setup, Motorsport header, 2.5 in. custom exhaust w/ high flow cat, Magnaflow muffler, Fidanza aluminum flywheel, ACT clutch kit,MSD 6al, Motorsport stage 2 cam kit. Which block, and which head out of the ones I have would be the best to use for my setup using the stock flattop pistons(from the F-54). Also , should I use the '79, or the '82 5-speed transmission? Thanks Tim

F54 blocks are reputed to be stronger and more rigid. The N47 head will give much higher compression (around 10.5:1 or so), although the combustion chamber shape may not be as efficient.

Is 10.5 :1 too high for my setup for the street, or will it work ok? THANKS, TIM

From what I've read, that's close to the maximum CR you want before having to retard timing, use race fuel, or other things to prevent detonation. 93 octane is a must--one advantage being am East Coaster, I guess...

Out of curiosity, why do you want to carb a 280ZX? Seems it would be easier to turboswap and get 300+ HP for the cost of triple Webers, especially since the fuel injection wiring is already there...check out member Proxlamus (sp?) and see what he's done...

Steve

I found a setup off of a wrecked vehicle locally, my uncle knew the guy, and i got the whole setup for $200.00. I have two late model 240sx's and I thought I'd try something different. I never messed with carbs before, so i figured I'd learn something new. I'm open to suggestions on what types of setups I can use with the parts, I have. THANKS FOR YOUR INPUT, TIM