Twin turbo identification #
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Joined: Apr 2011
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From: Millersville Md
Twin turbo identification #
I have searched for the identification numbers for the factory twin turbo assemblies. i can not seem to find any information about them. I have two factory twins. The first has -n3a1- stamped in the turbo housing and the second stamping is -N8c1- . I am trying to determine which year and what they are. Does anyone happen to have any information ? What are the stamping numbers for the 99 spec factory twins? Thanks in advanced.
I've got a post somewhere on this....
The original turbos were the N3A1's. The first revision was N3C1, they're functionally the same but the turbine housing have a higher nickel content in the cast iron so they're far less likely to crack. Actually, most N3C1's I've seen had no cracks.
N3G1's are the '99+ twins. You can also spot them by the black abradeable seal in the compressor housings around the compressor wheels and the compressor housings are held on with 6 10mm bolts instead of 1 large snap ring.
Horsepower-wise, the N3A1's and N3C1's are identical. But, the N3C1's are better due to them not being as prone to cracking. Nearly every N3A1 I've ever seen have been bigtime cracked.
Dale
The original turbos were the N3A1's. The first revision was N3C1, they're functionally the same but the turbine housing have a higher nickel content in the cast iron so they're far less likely to crack. Actually, most N3C1's I've seen had no cracks.
N3G1's are the '99+ twins. You can also spot them by the black abradeable seal in the compressor housings around the compressor wheels and the compressor housings are held on with 6 10mm bolts instead of 1 large snap ring.
Horsepower-wise, the N3A1's and N3C1's are identical. But, the N3C1's are better due to them not being as prone to cracking. Nearly every N3A1 I've ever seen have been bigtime cracked.
Dale
Thread Starter
Joined: Apr 2011
Posts: 804
Likes: 286
From: Millersville Md
I've got a post somewhere on this....
The original turbos were the N3A1's. The first revision was N3C1, they're functionally the same but the turbine housing have a higher nickel content in the cast iron so they're far less likely to crack. Actually, most N3C1's I've seen had no cracks.
N3G1's are the '99+ twins. You can also spot them by the black abradeable seal in the compressor housings around the compressor wheels and the compressor housings are held on with 6 10mm bolts instead of 1 large snap ring.
Horsepower-wise, the N3A1's and N3C1's are identical. But, the N3C1's are better due to them not being as prone to cracking. Nearly every N3A1 I've ever seen have been bigtime cracked.
Dale
The original turbos were the N3A1's. The first revision was N3C1, they're functionally the same but the turbine housing have a higher nickel content in the cast iron so they're far less likely to crack. Actually, most N3C1's I've seen had no cracks.
N3G1's are the '99+ twins. You can also spot them by the black abradeable seal in the compressor housings around the compressor wheels and the compressor housings are held on with 6 10mm bolts instead of 1 large snap ring.
Horsepower-wise, the N3A1's and N3C1's are identical. But, the N3C1's are better due to them not being as prone to cracking. Nearly every N3A1 I've ever seen have been bigtime cracked.
Dale
At least four versiosn floating around as Dale points out:
'93 models can with N3A1-13-700
first modification was to N3A1-13-700 used on 94 and 95 production not sure of VIN cuts.
an alternative is listed as N3C1-13-700A
and the '99 spec 280PS version is called N3G1-13-700
'93 models can with N3A1-13-700
first modification was to N3A1-13-700 used on 94 and 95 production not sure of VIN cuts.
an alternative is listed as N3C1-13-700A
and the '99 spec 280PS version is called N3G1-13-700
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