350 not good enough

[Kevin Shasteen]

Originally posted by BAlford:

[QB].., I checked the compression on one cyl and it had 150 PSI.., QB]

Typical BMEP (Brake Mean Effective Pressure) for typical NA engines are:

 

1) 130-145 for a typical street engine

2) 165-185 for a high perf.engine

3) 185-210 for an all out racing engine

 

Keep in mind; your psi will/may increase drastically once you go back to a supercharger.

 

Could the noise you're hearing be "Pinging" or "Detonation" from abrupted airflow/velocity and or an improper timing, all due to the supercharger having been removed(?).

 

You may want to take everything apart & mic the entire engine and internals; just so you know what you have. Then make the needed decisions for addt'l hardware.

 

You definately will need to first know what you have before you can possibly know what it is you need; baby steps....slowly and caustously.

 

Kevin,

(Yea,Still an Inliner)

[Guest Anonymous]

Good advice so far. Without knowing what the internals are for the engine in the car your hands are tied. The only way to be sure of what is inside is to do a complete tear down. It sounds like you aren't looking for anything really wild performance wise from the car, just a good street machine. I have just started looking into the Zcars but I would guess that 300 to 350 hp would get you were you want to be. The good news is this should be easy with your spare 350 and less than $2500. I would start by researching the spare engine. You can go here to try and figure out what the engine came in ---> http://www.mortec.com/ . Once you figure out what you are starting with and where you want to end up then its time to start choosing parts to make it happen. One combination would be boring you block .030 over(good chance it would need this anyway for proper cyclinder sealing), reusing the stock crank, reconditioned factory rods, 9:1 compression, comp cams XE268H cam(or similiar), dual plane manifold, ~600 cfm carb, and headers w/ duals. I haven't mentioned heads yet. There lots of options here, you could port the factory heads, or go with vortecs or sr torquers... these are just three possiblites for a little more money there are iron eagle, edelbrock, trick flow, aso. Depending on the heads this should put you around 300 hp at 5000 rpm and 350 ft/lbs of torque from ~2000rpm to 4500 rpm. It would easily run on 89 or 92 octane and should make the mileage you are looking for without a transmission change. cam

[Mike kZ]

 

I'm with most of the guys here, return it to a blowen engine. If you don't want a tall blower sticking out of the hood, you could go with the lower Holley Procharger. But first you need to check out this engine. If you're not comfortable with taking it appart, bring it to a high perf engine builder, he can tell you what you have.

[Guest Anonymous]

I agree, thats the blower I was talking about, low profile. I'd have no issue using it thats for sure, I mean how much more wow can you get unless its a bigger blower when you flip open the hood.

 

Regards,

 

Lone

[BAlford]

Mike Kz, did you use the A/C compresssor off of a 280ZX engine. I have bought a nother compressor but was looking at the z compressor and it looked like it would work. That way I would not have to change hose connections.

 

Going back to a blower sounds real interesting. How much horse power could I expect?

[Mike kZ]

Originally posted by BAlford:

Mike Kz, did you use the A/C compresssor off of a 280ZX engine. I have bought a nother compressor but was looking at the z compressor and it looked like it would work. That way I would not have to change hose connections.

 

Going back to a blower sounds real interesting. How much horse power could I expect?

My compressor is not from a 280ZX, mine is a Sanden 508. If you have your AC system still intact and your compressor is still good, just make a bracket for it to fit your smallblock.

 

What your engine will make with a blower depends on its internals and heads. Like I said bring it to a builder so he can see what you have.