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by **Richie O** » Mon Jan 12, 2009 9:39 pm

I did not do mine. A guy that grew up here went away to school and now he is the best 5.9 guru in the state. He builds most of the pullers stuff. I was a whimp and had him do it. At the time I was scared to frig something up. All my wrenchin days were on small block chevys. That was afew years ago. I watched him do it and it was very quick. I know they sometimes can stick on there. Sometimes a little heat and a big hammer can get the housing loose. I will do mine someday when it warms up. I do remember for 2 weeks before I was to go up he said put PB Blaster to all the bolts on the turbo. I am sure that helped.

by **gear jammer 91"** » Mon Jan 12, 2009 9:55 pm

When I did mine it was very difficult to remove the exhaust housing. It took a lot of penetrating oil, and a lot of careful blows from a hammer to get the housing off. You have to be vary careful when you are removing the housing not to damage the exhaust turbine wheel.
If you have the 21cm housing I would say do it in a heartbeat, I had the 18cm and barley noticed a difference.

by **peobryant** » Tue Jan 13, 2009 12:52 pm

Alright, looks like I will be sending out a money order soon.

Thanks

by **peobryant** » Wed Jan 14, 2009 1:14 pm

Another thing, with the mods in my sig, what do you think my EGT's will run at with the 16cm housing?

My only fuel mod is the DennyT pin.

Thanks.

by **peobryant** » Thu Jan 15, 2009 4:50 pm

I was told on the DTR, that the 16cm housing would actually drop EGT's, and the DennyT pin would bring them back to about where they were with the 21cm housing.

That doesn't seem right to me. I thought the smaller the housing, the higher the EGT's. Someone said it was due to the turbo actually working that the EGT's would go down.

Thoughts anyone?

by **Richie O** » Thu Jan 15, 2009 5:11 pm

I read that too. I don't know if its true but it does make sense that the 16 would make the turbo more efficient. I bet with the dt pin that will make things hotter. :shock:

by **gear jammer 91"** » Thu Jan 15, 2009 5:40 pm

My theory on why the 16cm would bring your egt's down when compared to a 21cm is this; when you switch to the 16cm it allows your turbo to build boost faster and reach a higher boost level which in turn burns the fuel more completely. The extra air allows the turbo and engine to work more efficiently, making more power without as much heat. Again this is just my crazy theory. :lol:

by **SChandler** » Thu Jan 15, 2009 5:52 pm

I recently changed out the 21cm on my 92 to a 16cm. I haven't seen any changes in EGT but I have noticed a significant improvement in responsiveness. I wasn't sold on changing to the 16cm after doing it on my 90 (which started with an 18cm), but I think it is worthwhile if you have a 21cm housing.

by **peobryant** » Thu Jan 15, 2009 10:09 pm

gear jammer 91" wrote:My theory on why the 16cm would bring your egt's down when compared to a 21cm is this; when you switch to the 16cm it allows your turbo to build boost faster and reach a higher boost level which in turn burns the fuel more completely. The extra air allows the turbo and engine to work more efficiently, making more power without as much heat. Again this is just my crazy theory.

I suppose I'll test your crazy theory. I have to get rid of the 21cm housing, higher EGT's or not.

Thanks for the input.

by **gear jammer 91"** » Fri Jan 16, 2009 7:46 pm

My brother is about to put my old 16cm housing on his truck, he has the 21cm right now. It will be interesting to see the difference it makes on his truck too.

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