HuD 91gt Posted October 4, 2016 Share Posted October 4, 2016 (edited) I just picked up a nice little (Looks big to me) HX35w with a 18cm housing. Does anyone have any experience running this larger 18cm housing on a 2.8?It also came with a 12cm housing, but the 18 has a very nice V band already welded (As well as being mounted to the turbo). Should I even bother with attempting the larger housing or should I swap out to the 12cm right away. This is a street driven,1mm overbore L28. 8.6:1 compression. Hoping for about 350 rwhp eventually. Picture is for entertainment purposes only. Edited October 4, 2016 by HuD 91gt Quote Link to comment Share on other sites More sharing options...
Greeko Posted October 4, 2016 Share Posted October 4, 2016 here is some decent reading. http://www.d-series.org/forums/forced-induction/120686-holset-turbo-specs-hy-hx-h1c-wh1c-h1e-wh1e.html It seems like the hx35w may be able to just support what you like. Nice to see a fellow vancouver tuner! Quote Link to comment Share on other sites More sharing options...
lowrider Posted October 5, 2016 Share Posted October 5, 2016 I ran the 12cm^2 exhaust housing on my 260z for several years before replacing it with a .68ar housing. The 12cm^2 housing worked but had a little more lag than I liked. I was getting peak manifold pressure of 18 psi by 4300-4500 RPM on an N42 bottom end and a p79 head with a stock C cam. I cant comment on the larger 16cm^2 housing, but I personally wouldn't want anything with a higher boost threshold.. Since changing to the .68ar housing, I am reaching 18psi by 3300-3500 now; which I feel is perfect. Just my 2 cents. Quote Link to comment Share on other sites More sharing options...
mtnickel Posted October 6, 2016 Share Posted October 6, 2016 I ran the 12cm^2 exhaust housing on my 260z for several years before replacing it with a .68ar housing. The 12cm^2 housing worked but had a little more lag than I liked. I was getting peak manifold pressure of 18 psi by 4300-4500 RPM on an N42 bottom end and a p79 head with a stock C cam. I cant comment on the larger 16cm^2 housing, but I personally wouldn't want anything with a higher boost threshold.. Since changing to the .68ar housing, I am reaching 18psi by 3300-3500 now; which I feel is perfect. Just my 2 cents. where'd you get that small of a housing for the holset? Quote Link to comment Share on other sites More sharing options...
lowrider Posted October 6, 2016 Share Posted October 6, 2016 where'd you get that small of a housing for the holset?Place called Tims Turbos on eBay. I looked and it looks like they are no longer on eBay but a Google search turned up their website. If I remember correctly the housing wasn't terribly expensive either. The only caveat is the fact that the housing doesn't have provisions to be internally wastegated. I welded on an external wastegate on the manifold under the turbo flange when I installed it. Quote Link to comment Share on other sites More sharing options...
HuD 91gt Posted October 8, 2016 Author Share Posted October 8, 2016 Thanks for the inout guys. lowrider, your the only one who I can reach who has real world experience. I was doing some searching on the BMW boards, and the 2.8L guys seem to like the 16-18cm housing, the the little 2.5L M20 guys tend go with the smaller housing from Turbo Toms or the like. I'll shoot him a message and see if they are even still available. Quote Link to comment Share on other sites More sharing options...
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