[rhodges]

I have a 1981 and will be putting a ZZ4 in soon and for those of you that have done this what changes have to be made to do so. I hear water pump needs to be changed?

 

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you need a short waterpump in a C3 , regardless what smallblock engine you use

 

[toobroketoretire]

you need a short water pump in a C3 , regardless what small block engine you use

Short water pumps with 3/4" shafts..............

 

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or a pulley with a 5/8 hole

 

[rhodges]

A little more info on the pulley, are you saying there is a pulley that would work instead of a pump change?

 

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yeah, as long as the belt groove lines up with your crank pulley. or you can use a bushing on your 5/8 shaft to take up the slack in the 3/4 pulley .. theres plenty ways to skin that cat .. BUT it absolutely must be a SHORT pump..the 3/4 shaft pumps were considered heavy duty .. but pumps are much improved since those days. I run a Hi -Volume Edelbrock Aluminum pump on my stroker

 

[rhodges]

Just an FYI I will be putting a turn key with the serpentine belt set up, does that still apply.

 

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you didn t say you had a Serpentine set-up? that's completely different

 

[toobroketoretire]

you didn t say you had a Serpentine set-up? that's completely different

If the water pump rotates backwards he's going to have fan problems. Can you buy backwards rotating fans?

 

[rhodges]

Anything you guys can offer before i do this would sure be nice.

 

[rhodges]

Found a reverse fan and clutch, had me worried there for a min.

 

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whoever you are getting the turn-key engine from, knows what on it.. they should be able to tell you exactly what you need. as far as the pump, it should already be installed with serpentine system aligned. you should have no problem .

 

[toobroketoretire]

A couple of days ago I was reading an article on the ZZ4 crate engines and found they fall far short of their advertised 355 hp. The test engine only made a dismal 318 hp because of it's whimpy cam and cylinder heads. if I recall the cam's duration was 208/221 which makes it a very mild cam; certainly not a cam capable of making 1 hp per cubic inch. There is a 385 hp version of the ZZ4 that would be a better choice if you're wanting good performance.

 

[Hotrod]

Your water pump should be reverse rotation also.

 

[rhodges]

I read that too and now looking at a Blueprint engine. Over 400 HP and TQ. Less money!

 

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Blueprint has a good warranty . we have a few members that have them, as far as I know, no issues