[dauntless89]

My truck is one of the extremely rare 95's to come from the factory with a WH1C. I've been reading up lately on all the different size exhaust housings the H1C/WH1C came with. I know they have 12, 18.5, and 21cm factory housings and there were some other sizes available as aftermarket. What I had some difficulty finding is which sizes are wastegated. Are all the 1st gen housings non-wastegate?

Thanks

 

[CT21Cummins]

yes all the 1st gen housings are non wastegated. Only the 12 is gated, hence the "w"

 

[simplysmn]

several 95's I have seen had the Wh1cthe second gen's also have a 14 wg housing

 

[Big Blue24]

I've never seen a 95' with anything but a WH1C, and I've worked on several!!!

But as far as wastegates, you've got the same housing options as the HX35's, that means 12cm or 14cm for wastegated.

 

[dauntless89]

Interesting. I thought WH1Cs on a '95 model year were anomolous, but my truck's construction date is in '94 so that's probably where the confusion arises.

Is there an easy way to differentiate between the 12 and 14 without pulling the turbo? Assuming it's stock, I have a 12, right?

In your experiences, what differences are there EGT and spool-wise between 12s and 14s?

 

[CTD2500]

Mine also had a WH1C.
I didn't notice a major difference between the 12 and 14.