I've never put mine on a dyno but I know my car has more Hp than traction. In 1st, 2nd and part way through 3rd if I'm at full throttle I'm just smoking the tires (2 yr old Cooper Cobra 255/60/15's)

 

Ok, I have almost all the parts I need but there is a ton of flywheel confusion on the net.
I have searched and searched and get conflicting answers
Can anyone with a ZZ4 and a standard transmission (preferebaly a stock trans-Muncie/BW) please post What flywheel they installed
How many teeth
What diameter
Clutch size/diameter
Brand- part#
New or used... if used what did it come out of?
Balanced or not
Ect:
This is driving me absolutely nuts!
I have scoured the web and have found nothing but conflicting data.
Any help from those that have actually done this swap is greatly appreciated.
Thank you all
Bob

 

When I did mine I took my flywheel to autozone
we looked up a flywheel for a 99 silverado they had one in stock
same teeth, diameter and the vortec bolt pattern! that was 2 years ago I think it was $90.00 or so...... My car is driven daily with no problems!!

I'm pretty sure it's this one
http://www.autozone.com/R,APP1158268...ductDetail.htm

I'm still moving in..... When I come across the recipt I'll get the part#

 

I bought my clutch at the same time
Zoom Performance clutch kit for my car (73 Vette)
I I took my old flex plate so I'd get the right splines and made sure the bolt pattern was the same as the new flywheel. They had the clutch kit at the warehouse, I had called them in the AM and they had it in the store by noon so when I got there all the parts were in the store and correct!!!
I understand your confusion..... I had no way to find out what size clutch was in my car 'till I had the motor out
AutoZone was a big help!!!

 

But...no surprises here given the factory dyno chart, right? I have to think the FlowTechs aren't doing you a lot of favors here vs. Hookers or Hedmans.

And I think this is right in line with my initial post; not a screamer, suggest shopping around.

 

Bob,

Being a new member and a new vette owner I am reluctant to chime in but I just finished a zz4/kiesler 5spd swap in my 1972 convertible. I bought the turn-key crate with the serp accessary kit. I replaced a slightly tired origonal base 350 and muncie 4sp. The difference is night and day. I don't know about all the dyno numbers but I can smoke the tires off my car with the new set up and cruise at ~2k rpms at interstate speeds. I did the istall myself at home in my carport. It was not with out some minor issues but all in all an enjoyable worth while experience. I would be happy to provide any help I can. GOOD LUCK!!

 

168 teeth
14" diameter
11" Clutch Plate
Flywheel, clutch plate and pressure plate came from Keisler Engineering.

When I converted from my L48 to ZZ4 I had to buy a new flywheel. Because my original flywheel came with my TKO kit, I called Keisler to see what flywheel I needed, they had them in stock so I bought the correct one from them. Their flywheels are drilled for both 11" and 10" clutch kits.

 

Bob,
I hope this answers some of your question:
From my ZZ4 swap FAQ -
If you have a manual transmission you cannot use your old flywheel. The ZZ4 has the new style block with the one-piece rear main seal therefore the crank bolt pattern is smaller (3.0 inches compared to 3.58 inches on the old style cranks). Depending on your car and which transmission it came with, you need to figure out which flywheel you need. Flywheels with two different diameters are used on Chevrolet small-block V8, big-block V8, and V6/90? engines. Large flywheels are 14" in diameter, and have 168 teeth on the starter ring gear. Small diameter flywheels are 12-3/4" in diameter and have 153 teeth on the starter ring gear. The difference in flywheel diameters requires two distinct starter housings. Starter noses used with large diameter flywheels have two offset bolt holes; starters for small flywheels have two bolt holes which are parallel to the back of the block. Most Chevrolet blocks are drilled for both types of starters. If you are changing the diameter of your Chevrolet's flywheel, you can convert your present starter to fit the new flywheel by installing the appropriate starter nose, starter motor housing, found within each engine classification. This is not an issue if you have an automatic because the engine comes with a flexplate but you will have to note which starter nose you have and change it accordingly. I used the 14 inch 168 tooth flywheel GM P/N 10105832.

I've saw in a thread not to long ago that the P/N above is no longer available but the thread also said that the dealer's parts guy cross referenced it to a new part number. I also noticed that member jcswm said that he had to drill and tap the block for the z-bar ball. My ZZ4 block came from the factory with the z-bar installation location ready to go. It may be that the newer ZZ4's don't have this. Please check your block before you install it because you might have a hard time doing it with the engine in the car. It would be a lot easier to do on an engine stand. Let me know if you need anything else. It was a very easy swap and I've done a lot of engine swaps on many different cars in the past.

Link to the FAQ again:
https://www.corvetteforum.com/techti...=167&TopicID=3

John

 

Thanks guys!

John, I have read your ZZ swap diary about 20 times since I bought the ZZ4 and it's very helpful but the only thing it didn't state was if the flywheel should be ext balanced. This is what is really throwing me off.
Nowhere in GM's print did I find a 14" ext balanced flywheel.


I know I have an 11" clutch so I know I have a 14" flywheel and need to replace it with a 14" as well. And and my starter bolts are staggered too.

I got some very helpful info from forum member 72LT1 which also helped to clear things up some more.

I am still curious as to what others have used and where they bought it because I will be ordering the flywheel before I start the swap

The last issue is going to be the dipstick.
Some have stated that the supplied stick and tube wont work with headers.

Thanks.

 

Your intake will NOT work!!!

 

Why is that?
It's a standard 12 bolt angle pattern

 

a vortec intake only has 8 bolts (straight down) and higher ports if i'm not mistaken

 

Bob, when I installed my ROD on my ZZ4 block I used a RAM flywheel p# 1530. It's external balanced. I also used a CF dual friction 11" clutch p# DF148552, Lakewood scattershield, and Summit protorque starter offset staggered. Everything worked great!

 

Please excuse me because I am not trying to be rude and you have tried very much to help me..... but.... Are you sure you have a ZZ engine?

The ZZ4 does not have Vortec style heads.
It does have a hole drilled and tapped for the clutch Zbar.
There were a couple of other points you brought up that had no relation to the ZZ4 as well
Again, Are you sure you have a ZZ engine?

 

Your old Harmonic Balancer won't be correct either

 

I am not, and would never consider mounting a used balancer on a new engine
I bought the proper balancer for the ZZ4

 

Thanks Dirt!

 

A ZZ4 longblock should come with an 8" balancer. The heads are L98 aluminum. The fast burn aluminum heads are vortec (what I have). The stock ZZ4 intake will accept both spreadbore or squarebore carburetors.

 

I bought my engine at the GM dealership & was told it was ..... The (dented) oil pan had ZZ4 painted on it so I replaced it ... Never had any reason to think it wasn't until now????

 

My bad!!!!!
I never really looked into it.... Looks like I've got a 4 bolt main truck engine ..... not a ZZ engine

Good thing it cost me next to nothing.... Still runs like a BEAST with the Hotcam