I have a zz430 it does well with 430 hp but I would like to increase it 170 hp for a 600 hp smallblock
I am using a holley 750 vs carb and I get 22 mpg so I am not worried about loosing a couple of mpg.
I thought about buying the vortech kit but I dont know if I can reach my goal with it. My compression ratio is 9.6 is this too much? Im pretty sure the bottom end of the zz4 is strong enough except for the pistons
What are your thougths to achieve 600 hp with the zz430

 

I would suggest the GM injection system that could be gotten for one of those babies and then the supercharger. You could use the 749 ECM that is very popular here. In that way you could keep the economy (or better) and control the spark more safely to defend the pistons.

 

I called smeading in California to get a price on some engine work. They reccomended putting some bigger valves in the fastburn heads. Is this really needed with a supercharger? Cant you just turn up the boost to overcome this?

 

flow in a boosted motor is just as important as in a NA motor. I dont feel the valve work is needed to achieve your goals.

I feel if you are going to open that can of worms you may as well go through the motor and add forged slugs.

 

Thanks for the reply,
Can you comment on the bottom end of the zz4 block. Are the rods OK? IS the hot cam a good canidate for a supercharged motor?

 

no it is not, it can generate excessive amounts of cylinder pressure.

 

Your talking about the Cam right. What makes it not a good supercharger Cam? 218,228 112 lobe seperation I think these are the specs

 

dont get me wrong its an awsome cam but not for supercharging here read this

https://www.thirdgen.org/techbb2/sho...postid=1148061

 

Thanks, Almost seems like it would be easier to forget the zz430 and start over?

 

hmm I can say the ZZ430 wouldnt be my first choice for this but then again if you do go with the EFI or just add the EFI hardware and run a ECM made for our cars, then you could get say like thebasemodel P1sc kit made for our cars with regular intercooler and no changing cams or piostons and see what happens.

 

Could I do the same only using a carb bonnet. Im not really scared of loosing mileage. I get 22 mpg with the holley carb,

 

You'll have to do some modifications to the carb for a flow thru application. Also, it's harder to tune a flow thru system than a pull thru system like a roots blower.

 

and the fuel system for a blow through needs to be nearly like a EFI fuel system

 

As far as the valve work they suggeste goes, were you clear (or did they understand) that you have the ZZ430 which has FastBurn heads? They might have ZZ4 and stopped listening at that point.... if that's the case, I could see the valve suggestion because then they are under the impression you are using ZZ4/L98 aluminum heads