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-   -   czt engine kit? (https://forums.probetalk.com/showthread.php?t=1701168067)

boosted2g August 9th, 2005 08:34 AM

czt engine kit?
 
I have the czt internals. I had a horrible knock in the motor. Took it apart after only 1500 miles, and all the bearings were destroyed. Both rod bearing and main bearings. I need to know if these guys are still around? Also if anyone else has this kit what are the changes that need to be made to the block to get everything to fit? (I cant find any old email's) Anyone with some information please let me know.

babyblueMX3 August 9th, 2005 09:44 AM

I have it in my car and no problem what so ever..THe main concern we had when machined/assembled the engine was to ifnd proper rod bearings to fit the cranks. the 0.030" undersize he sent with the kit was too big.
0.040" under fit but didn't have enough clearence. so we machine down the crank in order to fit the 0.050" undersize

You did check the clearence between bearing and crank right? I hope you did and not installed the first of bearings you got.

I got the clevite 0.050 bearings for rod paired with toga high performance main bearings...0 knock

janz99 August 9th, 2005 10:10 AM

I also have this kit, and we had to machine the crank as well!! If you didnt machine the crank chances are this is why you have chewed up all the bearings!! He told me specificly that i would have to machine the crank.

CZT is still around, its just hard to get ahold of him!! Ive talked to him several times!

Ryan

deejayarse August 9th, 2005 01:37 PM

Same here. I have czt kit in my engine and the machine shop was having hard time with having it all machined up. I'd remember they had to machine the crank too. There were some issues with the bearings but I really can't remember what it was.

Mici

boosted2g August 9th, 2005 01:46 PM

:

Same here. I have czt kit in my engine and the machine shop was having hard time with having it all machined up. I'd remember they had to machine the crank too. There were some issues with the bearings but I really can't remember what it was.

Mici

I know that the bearings that were in there were the .040. The main bearings were the ones that failed. The knock came alive when we were making 21psi. When I took everything apart the mains were destroyed (toga high perf.) the rod bearings werent as bad, but not reusable(sp)

Also when you mach. the crank don't you lose some strenght?
Thanks for the help!

mx6gt04 August 9th, 2005 02:21 PM

You do lose some strength, but i highly doubt youll ever break it.


You sure you had good oil pressure? Sounds like an oil delivery problem to me, if the clearanced were right.

boosted2g August 9th, 2005 02:51 PM

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You do lose some strength, but i highly doubt youll ever break it.


You sure you had good oil pressure? Sounds like an oil delivery problem to me, if the clearanced were right.

I have a brand new high volume toga oil pump. Pressure seemed normal. Around 50psi. what oil psi do you run?

gus 93pgt August 9th, 2005 03:39 PM

Did the motor tick or make noise from the get-go?can you get some pictures?usually you can tell if it was oil or clearence issues.is the bearing worn out evenly?or are they just destroyed?

TRWeiss1 August 9th, 2005 04:05 PM

At 21 psi, are you sure the knock you were hearing wasn't detonation? What kind of timing/fuel delivery are you running?

boosted2g August 9th, 2005 04:39 PM

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Did the motor tick or make noise from the get-go?can you get some pictures?usually you can tell if it was oil or clearence issues.is the bearing worn out evenly?or are they just destroyed?

Main bearings were destroyed (peices of them in the oil pan) Rod bearings were just worn. The motor had 1,500 miles.

boosted2g August 9th, 2005 04:47 PM

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At 21 psi, are you sure the knock you were hearing wasn't detonation? What kind of timing/fuel delivery are you running?

Megasquirt, 65lb injectors.

janz99 August 9th, 2005 10:51 PM

Who did all the machine work, clearancing the bearings etc??? We had a hell of a time with EVERY bearing on this engine. Were the main bearings sat, the hole was actually to large, so we had to machine down the main girdle then re-line hone were the main bearings sit. Then the crank had to be machined to fit the over sized bearings!!

ALSO VERY BIG!!!! My scat rods were OUT OF ROUND!!!! Oval if you will, the large end. We had to machine the caps of the rods, then re-hone the rods to get them perfectly round!!

I am going to say that the machine shop that put your engine together over looked a few things and now this is why you are having difficulty with it!!

Let us know how it turns out!

Ryan

93GTSR August 10th, 2005 06:20 AM

wow, sucks to hear this guys. Makes me glad that i have moved on to cars with actual aftermarket performance, and being able to buy things that have been tested many many many times, and i know they work :(

boosted2g August 10th, 2005 07:02 AM

:

Who did all the machine work, clearancing the bearings etc??? We had a hell of a time with EVERY bearing on this engine. Were the main bearings sat, the hole was actually to large, so we had to machine down the main girdle then re-line hone were the main bearings sit. Then the crank had to be machined to fit the over sized bearings!!

ALSO VERY BIG!!!! My scat rods were OUT OF ROUND!!!! Oval if you will, the large end. We had to machine the caps of the rods, then re-hone the rods to get them perfectly round!!

I am going to say that the machine shop that put your engine together over looked a few things and now this is why you are having difficulty with it!!

Let us know how it turns out!

Ryan

I think that you are correct. The machine shop broke it off in me!

charger758 August 10th, 2005 10:56 AM

What a nightmare, I hope you get this straightened out, thanks for posting too. Before I buy an engine kit it will help with my research.

Probesport August 10th, 2005 11:00 AM

:

wow, sucks to hear this guys. Makes me glad that i have moved on to cars with actual aftermarket performance, and being able to buy things that have been tested many many many times, and i know they work :(

Following is always easier than leading ;)

TRWeiss1 August 10th, 2005 11:11 AM

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What a nightmare, I hope you get this straightened out, thanks for posting too. Before I buy an engine kit it will help with my research.

:offtopic: Glad to see you got your intake temps down man! :thup: :btopic:

93GTSR August 10th, 2005 03:40 PM

:

Following is always easier than leading ;)


Leading for years and years and going through 3 transmissions a summer takes it toll :D

So now ive moved on to cracking ringlands on 3sgte's :lol:

-Ty

twinturbo6 August 11th, 2005 06:02 PM

probesport, ole friend, why don't you lead us into a piston/rod kit that genuinely works? I believe we would all be grateful....

babyblueMX3 August 12th, 2005 04:58 AM

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probesport, ole friend, why don't you lead us into a piston/rod kit that genuinely works? I believe we would all be grateful....

why ? the czt kit is good enough. just a problem with the bearing size. depends on the wear you have on the crank :shrug:

Fastest95PGT August 12th, 2005 05:02 AM

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why ? the czt kit is good enough. just a problem with the bearing size. depends on the wear you have on the crank :shrug:

I think it was moreso because CZT's business habits have been questionable in the past so handing ~$1300 over might not be something people are willing to do . . . especially if CZT already has $400 of their cash for some .. other product.

I agree the bearing size isn't a real issue from the numerous people with this kit I have spoken to. Just bring a rod, bearing, and crank to the machine shop and say "make workie" and if the shop's decent, they can machine the crank ever so slightly to make it work.

charger758 August 12th, 2005 05:19 AM

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:offtopic: Glad to see you got your intake temps down man! :thup: :btopic:


Thanks, at the moment she is running better than ever.

janz99 August 12th, 2005 06:52 AM

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I think it was moreso because CZT's business habits have been questionable in the past so handing ~$1300 over might not be something people are willing to do . . . especially if CZT already has $400 of their cash for some .. other product.

I agree the bearing size isn't a real issue from the numerous people with this kit I have spoken to. Just bring a rod, bearing, and crank to the machine shop and say "make workie" and if the shop's decent, they can machine the crank ever so slightly to make it work.

Well if i was doing it, i would also have the shop measure the rods themselves, like i said earlier they were out of round by a big margin on my build!!

The rods, were not czt's fault in anyway, if anything, i would place the blame on scat for not checking to make sure they bored the rods out properly.

Ive talked to rob nemerous times, and he has always been upfront (with me anyways) on how long something was going to take to ship. He told me 3 and a half months on my engine kit, as he would have to wait for the pistons. It ended up taking him 4. :shrug: Id do buisness with him again.

Ryan

bslav94pgt August 18th, 2005 06:38 PM

Hey this is gus 93pgt on a diff computer,anywho,destroyed bearings=machine shop error.They have to machine each bearing journal,and line hone the block/girdle and the balance the rotating assembly.Reason is the .040 is alot for the mains,it's expensive,but it has to be done,otherwise when the motor sees alot of stress the main bearings will just get demolished.I'm into DSMs now,but same machining process has to be taken.I would try and get sme money back off the machine shop.

janz99 August 18th, 2005 07:34 PM

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Hey this is gus 93pgt on a diff computer,anywho,destroyed bearings=machine shop error.They have to machine each bearing journal,and line hone the block/girdle and the balance the rotating assembly.Reason is the .040 is alot for the mains,it's expensive,but it has to be done,otherwise when the motor sees alot of stress the main bearings will just get demolished.I'm into DSMs now,but same machining process has to be taken.I would try and get sme money back off the machine shop.


You sir are correct. This is what was done with my block to ensure proper fitment of the 40 over bearings!

Ryan