ZZ 575 /720 hp
 

Ck of the video on the dyno of the new zz motor , Do ya think the left it running on the dyno like they showed? :eek: Make a good boat motor except for the compression

http://www.gmgoodwrench.com/perfparts/flash/dyno.html

Re: ZZ 575 /720 hp
 

How much? and is there "any" warranty??

Re: ZZ 575 /720 hp
 

I'll take 2 :D :D

Re: ZZ 575 /720 hp
 

720 is race fuel only. The 620 is not and I believe Eliminator used one in a boat recently

Re: ZZ 575 /720 hp
 

http://www.gmpartsdepot.com/store/ca...ategory_ID=64&

Re: ZZ 575 /720 hp
 

I was considering these motors (the 620 HP) but I didn't know enough about them and I was hearing good/negative things about these motors for a boat. the GM add says that NO warranty if used in a boat. :(

Re: ZZ 575 /720 hp
 

There is a thread about them in the Tech. section.

Wannabe

Re: ZZ 575 /720 hp
 

GM has been having very good results with these engines.

We supply the carburetors for them. The only problems we've really had with them, is that they haven't been able to build them fast enough.

Re: ZZ 575 /720 hp
 

I'll take three :D my mechanic and I have been going back and fourth on these motors :rolleyes:

Re: ZZ 575 /720 hp
 

Re: ZZ 575 /720 hp
 

A dyno for days is a little exteme but they are looking for the weakest links. My engines saw a couple hours of WOT on the dyno. I have been told they will run them WOT for up to 5 hours looking for failure.

Actually runing a motor at 85% all day long is not that bad. However Flying one in and out of the water with constant throttle adjustments combined with the pounding is not that good.