EVO 8-9 16G on a RWD DSM motor.

GRNDSM · Post by **GRNDSM** » Thu Dec 14, 2006 1:09 am

OK, I found this thread on the topic:

http://projectzerog.com/forum/viewtopic.php?t=286

But I want to re-introduce the idea of using EVO8/9 turbos in RWD configuration. I know that Alex has tried it 3 years ago. But some thing have changed:

1. EVO8 turbos have made 420-440whp. Roughly the same as the good old 20G.
2. EVO owners seem to dumping those turbo at an unbelievably low prices! I just picked up EVO8 turbo w/10.5 housing, manifold and 02 housing for $300!!!
3. EVO 9 turbo is promising to make even more power (though, EVO 8 owners will probably drive their price much higher)

Unfortunately, Alex’s computer with photos of the install and project information has crashed, so I would have to re-create it (which isn’t a huge deal).

I have tried fitting the turbo/manifold assembly to the car and I can see these problems:

1. Alternator will have to be relocated to the other side (I was going to do that anyway)
2. Turbo would have to be spaced away from the block. I am first going to grind off large block on the turbo, which interferes with the block. That will give me an ideal how thick of a spacer I am going to need. RRE has ½” exhaust flanges for $30 ($45 for SST) I am hoping to get it down to just one spacer.
3. DSM water pipe will have to go (not a big deal on a RWD application)
4. The water pump will be VERY close to turbo outlet. I would have to make some creative modifications to the water pump (I would have had to do something, anyway)

BTW, I briefly considered using DSM exhaust housing and immediately scrapped the idea. While size-wise, the turbos appear to be interchangeable, they spin in opposite directions, so you can not combine those components

.

Has anyone else done this project?

GRNDSM · Post by **GRNDSM** » Thu Dec 14, 2006 8:20 am

Well, at this point, I am only looking at one extra part ($30-45 spacer). And I am saving ~ $300 on turbo/manifold set-up (compared to an EVO3 16G).

My guess is that EVO8 turbo, with its better exhaust manifold and 02 housing (especially if I get the tubular one) should make extra ~30-40hp over the EVO3 turbo.

And no-one really pushed the limits of EVO8 16G turbo on a DSM motor. We know that it makes a lot of power, but we do not know if this is because of much better turbo or is it because of better engine.

I am hopping to be able shed some light on it.

If I can figure out a relative easy way to slap it on a RWD DSM engine, that can be a very good thing for our small community!

GRNDSM · Post by **GRNDSM** » Thu Dec 14, 2006 9:18 pm

Alcohol/water injection is not necessary if you are using good race gas. As for “big intercoolers”, I think that stock EVO unit is pretty darn good. And I will get to test this theory

.

I am going to a better than stock (DSM or EVO) intake (BR sheetmetal) and will be using AEM EMS for tuning (which can be just as advanced as what many EVOs are using).

There are plenty of guys who are running low 11’s on 10.5 hot side turbos.

Dont those turbos flow around 605cfm?

Something like that, which roughly what 20g was rated at

.

Eric · Post by **Eric** » Thu Dec 14, 2006 10:08 pm

You wouldn't happen to be referring to Alex from Dentsport would you?

GRNDSM · Post by **GRNDSM** » Thu Dec 14, 2006 10:48 pm

Eric wrote:You wouldn't happen to be referring to Alex from Dentsport would you?

The one and only

.

GRNDSM · Post by **GRNDSM** » Fri Dec 15, 2006 1:41 am

I slightly modified the compressor housing. Looks like that should be enough to make it work with just one 1/2" spacer.

Check out some of the photos:

I really like how it is neatly tucked away. I always though that "flipped" DMS turbo looked very unnatural in a RWD application.

It is also pretty clear that I am going to have to use truck water pump, ether that or just cut off the DSM water pump and weld-on a connector. Turbo outlet would require a sharp 90 deg turn.

As a side queston, what do people port on EVO 8 manifolds? I have been porting manifolds for over 8 years and I do no yet see anything in this manfold that is worth porting

Eric · Post by **Eric** » Fri Dec 15, 2006 9:01 am

I emailed Alex a few months ago to see if he could get me his old Bimmubishi photos. At this point I'm far enough along in my swap, but they would still be interesting to check out.

I only had to "bore" out the water pump slightly to get this piece to slide in. So it's a good fit. Nothing more than a copper plumbing elbow from the hardware store:

GRNDSM · Post by **GRNDSM** » Fri Dec 15, 2006 9:40 am

Yes, that is along the line of what I had in mind. Is this a truck water pump? If so, does it have the same pulley location as DSM pump?

From what I can remember it was slightly different from the DSM pump.

Eric · Post by **Eric** » Fri Dec 15, 2006 10:04 am

It's the standard DSM water pump from the cars.

Bill Hincher · Post by **Bill Hincher** » Fri Dec 15, 2006 6:40 pm

Not to be the devils advocate , leon, but where are you intending to put the motor mount?

GRNDSM · Post by **GRNDSM** » Fri Dec 15, 2006 8:11 pm

Bill Hincher wrote:

Not to be the devils advocate , leon, but where are you intending to put the motor mount?

Now, there is a valid question!

I am using very narrow (left to right) Chevy motor mounts, which are also fairly low:

I am pretty sure that they will clear. But I will not know for sure until I get them back from the powder coating place and test fit everything.

However, I can see that this might be more of a problem for a conventional motors mounts... But I am sure that it isn't something that a custom 02 housing can not solve

jeffball610 · Post by **jeffball610** » Sat Dec 16, 2006 4:52 pm

i thought about doing the same thing a while back, but scapped the idea because no one offers upgrades to the stock EVO turbo. You can upgrade the manifold (Megan Racing has one), but most people get T3 or T4 manifolds and new turbos. As far as I know the stock turbo runs out of steam up high and can only support about 17psi by redline. It's nice for spool and daily driving, but big numbers can be made on fairly priced turbos. The best of luck to you though. I hope you prove us wrong. I still wish there was another turbo we could run that didn't stick out like the reversed DSM units.

GRNDSM · Post by **GRNDSM** » Sat Dec 16, 2006 5:04 pm

turbo we could run that didn't stick out like the reversed DSM units.

Well, at least you agree with me that those turbos do not look right

.

As for "big numbers", it is all relative. Several people have made around 430 whp on this turbo. I consider that "pretty big".

Unfortunatley, my ETs will not be very revelant (since my car will be ~900-1000lbs lighter than an EVO), so as much as I hate it, I will have to get into the dyno numbers