Hey Joe, didn't notice it was you that posted up about the pulley! I think we've discussed the pros/cons before and I know your position, so let's not go too far here.

I agree, it would be good to see it dyno tested by a reputable shop.

EVOlutionary

 

That AMS post is inconclusive to any actual data on the good or bad of the XS Power FMIC. I read that post a month ago. I know the tests you have done to gather info on your IC now sitting in my garage although if AMS was so upset that it was a knock-off/inferior product than do back to back tests like Buschur. Instead they would rather complain about it. So Buschur does not make any of the O2's in this thread and they tested them. I see no reason why they could not test the XS Power FMIC in the same light. I will even provide the XS Power IC for them to test. You offered the same to AMS and they turned down the offer. I wonder why? Someone should do a back to back test, bottom line.

The same goes for crank pullies. The harmonic argument is very good although until i see any concrete harmonic measurements done with stock vs a solid dampener I say this is also inconclusive. If aftermarket pullies hurt our cars Unorthodox probably would not sell one. Unorthodox is a great company and may have this info although until truth be told I still feel there are very minimal if any downsides to running a solid pulley. I know we have had this argument before, I will leave it at that. The only thing I asked DB to possibly test is if it actually makes more power. I will also provide a pulley to be used for this testing.

I only asked DB if he would be willing. If your not willing please PM me why and I will leave it at that. Thanks!

EDIT: I agree not to go too far off topic although I posted it here because there is big potential that DB will see this post.

 

It's funny that I am being asked to do more testing. I am sure if I did it some jack off would find fault in how I did the testing.

The pulley testing, there is no way in hell I am putting any solid pully on MY car. The harmonics are facts and the use of the solid pullies can result in damage. The stock EVO pulley is very light and well designed. IF it wasn't a part that was needed do you think Mitsubishi and all the other car manufacturers of the world would waste the time and money engineering it and the added expense of building it to have it on the engine?

As for the intercooler testing. I have a question. Are you guys saying that the SSAC intercooler that is a copy of the AMS intercooler is the same one that XS Engineering is selling? If so I may be interested in testing it..........although I shouldn't.

 

Common mistake...

XS-Engineering is out of CA and is an Evom vendor recently. I actually use their FMIC, but it's not necessarily endorsed by me. Only 3" thick.

XS-Power is a subsidiary of SSAC and is an ebay seller. XS-Power makes the AMS copycats.

 

Two hose clamps at a time... sure it a lot easier than swapping o2 housings.

....... I can't think of any reason your shouldn't

 

As my dad used to say - "You can please some of the people all of the time. You can please all of the people some of the time. But you can't please all of the people all of the time."

EVOlutionary

 

i would love to see the XS Power intercooler test. it would be nice to see pressure drop and manifold air temp compare to the stock one.

XS Power intercooler

 

So if you put a new intercooler on and it gives you more boost, but you run the same a/f and timing, would you attribute the power gains to the intercooler or boost?

 

The intercooler is the one part that you changed, nothing else. This would have me say "intercooler" is responsible for the gains. Without it, there would not have been gains.

 

Agreed, the question you are asking is a baited question. If you install a new intercooler and the afr's etc. stay the same but the power goes up then you gained the power from the intercooler swap. What you aren't realizing is the boost was always there it was just backed up in the head/exhaust and contributing to more back pressure in the turbo trying to spin harder to make the same boost. Now you have a real intercooler on the car (only considering it a real intercooler if the cooling was also held the same or dropped) the boost went up. So the power was from the intercooler, I expect an increase in boost with a good intercooler being installed on a car. What you will also notice is although you just gained a pound (or more) of boost is that the knock count (if the intake temps stayed the same or dropped) more than likely stayed the same or even dropped, just like hopefully the intake air temps did.

Same thing with this 02 housing testing. If all other variables stayed the same and the boost changed with an 02 housing swap I am going to say that the best flowing 02 housing is going to have the highest boost and the worste flowing is going to have the lowest boost. What is the gain from? Boost or the part? Well just like the intercooler they are both the same. Without a better designed part that flows better the boost would not have changed. If I have to crank the boost up an additional pound or more to equal what I had with a different part more than likely the new part sucks. There are exceptions to this such as having a head that flows more, a turbine housing that flows more, larger cams etc. As for an intercooler or 02 housing those are both before or after anything else that is going to effect the flow and any improvements I can see in boost from either of those two parts is a good change.

BTW, since XS is the same company as SSAC, I am not interested in testing the product.

 

Thanks for the explanation David. That makes more sense now. The increased boost w/ the same boost control setting (same turbo shaft rpm) does mean the part is working more effectively.

 

Interesting information to add to this.

I was sitting on the can reading the newest issue of D Sport Magazine (you guys should subscribe to this by the way).

In this months issue they are in the search of more power on pump gas with the stock turbo.

Their baseline of the car was 333 whp with 21.3 psi of boost. The car had an APexi Power FC, ARC intercooler, XS Engineering Racemax Downpipe, XS Engineering intercooler pipe, MSD 96 lb injectors, APexi GT Spec Exhaust, Comp Cams 272, Helix Cat Delete and a K&N filter.

They then added the DC Sports header and the Invidia 02 housing. In the article it says that these two mods required some significant changes to fuel and ignition maps. The Apexi Power FC is not a stand alone that has boost comp, which is what I use on the AEM EMS. I would attribute this to the fuel map retuning. Anyway with all the re-tuning, the header, Invidia 02 housing AND .7 psi additional boost the car gained 13.2 whp.

I would say that with this round of testing this should make many of you "your boost was too low and you didn't re-tune" guys happy to know that my testing should now be good enough to prove there is no power to be had.

Re-tune+.7 psi+header+Invidia 02 housing=13.2 whp. Not too hot.

 

Sweet !! you guys are no joke thanks for test

 

David,

Man, you need to call up DSport, have them give you the car for a day, and show them how to make real power instead mixing up a bunch of odd parts (XS DP with Apexi exhaust, why??) or them throwing expensive Japanese parts at the car (ARC intercooler).

Sad thing is, you know a ton of kids are gonna say "dude, I can get 13 HP just by putting on this header, 02 housing and cranking the boost!" and then theyt'll go out and waste their money just because they saw it in a magazine.

EVOlutionary

 

this test would make the tomei downpipe and o2 the best combo on the market :\