When you look at how the chambers of the turbine housing mate up to the o2 housing, it becomes clear why a 2G DSM o2 housing (even after porting) is a compromise. Big16G, or E3 16G mates best with the E3 o2 housing. When I finally got my hands on...
When a EVO 3 16g comes with its O2 housing, it would make the difference more significant. The EVO 3 O2 housing has the largest outlet ID. (Keep in mind that the EVO O2 housing outlet flange has a slight different angle than DSM.)1st-2nd pic ...
Ok, the nomenclature you typed makes more sense and makes it easier to discern between the two.I've seen the Evo 3 described that way in a couple other places over the years and I think it just stuck in my mind and I kept calling it that, even...
The most sought after model would be the MHI Evo 3 16g which would have the 47 serial number. Seems to be the best combination of airflow and boost threshold.
Yeah I’ve had that thread bookmarked and I referenced it in the past when I was researching how to determine what turbo is what based on the numbers stamped on the compressor cover. That’s how I knew which model 16G each of these turbos was. “42”...
A real vs fake has more to do with reliability than performance.
The real exhaust turbine has high nickel content in the cast iron reducing the tendency for cracking, and the turbine shaft is likely to hold up longer, which will improve the...
There are flavors of MHI Big16G. They are nearly identical. The number stamp on the compressor cover that completes the part number will give a clue where it came from - example “42” is from a typically from a Galant VR4, and “47” is from an Evo...
I totally agree, I always opt for real vs. fake.Both the turbos I'm referring to in my original post are Genuine MHI, I'm wondering if there is any theoretical advantage of any sort to running the regular Big 16G as opposed to the Evo 3 16G? I...
I am looking at purchasing a used, good condition Genuine MHI Big 16G (Non Evo 3). However, I'm not sure I need it as I already own, but have not yet installed, a genuine MHI Evo 3 Big 16G and also an MHI small 16G. When I do make the upgrade...
Thank you for the reply, there is a lot of good info contained within. It definitely gave me some knowledge/insight into the ins and outs of our 4G63 heads.
Lapping to improve sealing is a waste of time. If you lap enough to remove all imperfections you will just wear the valve face all concave and round the edges of the seat. The defined angles will be gone and the seating will be terrible. A...
Thanks for the replies. Coming from you guys, that’s enough reassurance for me to feel fine about reusing them.I’m not sure where I originally read that they shouldn’t be reused, I think it was in the product description for aftermarket 4G63...
Keepers can be reused. Ive never heard the opposite in nearly 16 years. Then again Im not on Facebook, maybe that's where it started?Keepers are just little chunks of metal that prevent the valve from pulling through the retainer, as you know...
I pulled the head on my Spyder to upgrade cams, springs, valve seals, lifters, etc.It looks like the valves and valve seats are in good shape so I’m going to just clean them both up and reuse the valves. Originally I was thinking about putting...
I'm looking to purchase an Evo 3 Oil Filter Housing.In other words, I'm looking for an air-cooled Oil Filter Housing for a 7-Bolt.Let me know if anyone has one available.Thank you