I installed both the IC & Lower pipe. A couple observations and questions.

There is an increase in lag, but not much. I thought the LICP would offset the larger core somewhat and keep the lag about normal.

Boost has dropped. I don't have a gauge on my car right now, but a search suggests it drops by as much as 3-4 psi.

What are some things I can do to decrease the lag? I plan on picking up an UNOS this Friday and will adjust the boost back up. I also will need to have it tuned obviously, but will those two things provide a lot of help as far as decreasing lag?

The core looks frickin sweet:

 

Douglas,


First of all, nice color!! A boost gauge is imperative before making on especulations.
I suggest you start with some boost readings before and after. Different core would give you different perceptions, the spool up and boost could be deceiving. In my opinion you should get the Defi boost gauge with the controller that way you can replay the boost readings.

As I mentioned you a couple of days ago on a PM the Buschur LICP gave us the ultimate spooling aid. We are very happy with the spool up improvement and the extra boost obtained.

How big is that core?, your problem matches my issue with the Nisei core, just too big. A MBC is a must also, you would get more consistent boost once the MBC is installed.

I see feasible your idea of increasing the boost to compensate the boost drop. Never rule out a small leak, they are the worst nightmare, they simply rob you power .

Carlos

 

nice wheels. rgii's gtr face?

 

what are your mods....usualy puttin on a front mount should be a later mod.. but i dont knwo what you have.. there will be a little lag of coarse bigger front mount more air need to fill it up.. but should not drop your boost down 3-4 psi.. something is wrong.. think you need to do a boost leak test.. suxs that you put your bumper back on now you will have to tear it all apart again.. if you have a problem.. also i be lookin around for this car in mesa very nice..

 

Did a compression test - there are no leaks. Using some big clamps too.

Yes - RGII's with the GTR face - dirty as hell due to some spirited driving over the weekend.

It's a IX, not a whole lot to do as far as mods to the engine. I have a Works Hi-Flow drop in, but won't install it till it gets tuned. That should increase the air flow somewhat I suppose. I also have the AMS cat back (this thing rocks - great pitch). I know a down pipe will also decrease lag, but I don't want a super loud car and I plan on keeping the stock dp & cat.

I don't know how much boost was lost, but the butt dyno tells me there is a little less psi now. I'll add some boost with the controller this weekend - at least back to stock levels.

I guess I'm just hoping the extra boost & a tune will help with a quicker spool based on my limited mods.

Carlos, what are all the mods to your IX?

 

Hold on... isn't the whole point of a FMIC upgrade to REDUCE spool/lag time? Assuming you haven't gone much larger than stock, the improved "design" is supposed to flow easier and create less restriction, thus IMPROVING spool time, isn't it?

I was thinking of getting the Greddy/Trust FMIC kit, but if you say these FMICs are worsening spool up, then I certainly won't be getting it.

 

Boost should not decrease at all with our FMIC. Boost will always taper off a bit with a stock turbo but it should taper off less with our core. There is less pressure drop with our core...quite a bit less.

I would go through and do a proper boost least test with compressed air. Something doesnt seem right.

Eric

 

Fair enough. I got the AMS core because it was reported to have less pressure drop. I'll do some more trouble shooting this weekend.

 

The AMS FMIC made my car pull way harder to redline and didnt have any lag in spool up . pressure drop at redline is about 1-2 psi which is excellent for a having the stock turbo

 

3-4psi sounds like a boost leak to me! it shouldnt drop more than 0.5psi with the AMS or any race FMIC.

 

SPOOLIN, a large FMIC isn't necessary at your power level. I know you live in AZ, but unless you do some serious road roacing or auto X I think its a bit over kill for a stock evo. You could have gotten a custom tune for the price of the intercooler and gained 40+whp. If you were tuned and putting down 350whp it would be more justified but even then it isn't really a necessity because the stock unit is very efficient. IMO not a wise purchase.

 

Car looks great man! hope you get your boost problems fixed soon!

 

I was recently in an accident and needed a new i/c (among other thngs). The car was only three months old at the time and I had the option to either buy a new oem i/c for $705 or get the AMS i/c for less. Now tell me again - what would you do?

Seriously, for the IX there just isn't a lot of performance upgrades you really need to do. You can open up the exhaust flow, but that's about it. You don't need to mess with cams, cam gears, waste gate, bov or the fuel pump. The larger core not only looks good, but I also thought it would help with the AZ heat.

As soon as I get all the bugs worked out from the recent repairs, I'll get the car tuned. I didn't have the car for a little more than two months (don't ask), so any psi drop could just be my imagination. I was also basing 3-4 psi off someone's comments in another thread in this vendor section.

 

Spoolin, You should definately get a boost gauge right away. You have no idea how much boost you are running, or how much you are losing.An intercooler before a boost gauge seems kind of backwards to me.

 

Dude, you've wasted money on an upgraded intercooler then. AMS says (check the website) the stocker is good well past what you've done...

Edit - read about why you needed a new i/c. I guess I understand, but still it's too much for your setup.

First and foremost; get a tune. Find an autorized Ecutek tuner that you trust and you'll be good. IX's are usually tuned safely to 22psi peak. And to say 'there's not much more to do on a IX' isn't true. IMO, 300whp is well more than most people need, which is probably what you're getting at.
Personally, any more $$ should goto suspension if you wanna be faster beyond that - and not dragging. Or build up the bottom in with a stroker. Possibilites are as limitless as your funds!