Random FMIC information with a little turbo info mixed in.....

[bboypuertoroc]

What ^ said.

Most, if not all, of the 9 second cars coming from Buschur are running the Race core. It can take whatever you throw at it.

[ImpulseWRX]

Hi I don't want to add to any politics as I know nothing about the companies in USA but I do know basic physics...

After looking at that wastegate return I thought it seemed more of a lazy "version 1.0" model that I would have done in the past just to quickly route back to exhaust due to rushing to get the car operational or something as it was the easiest & cheapest route to take.

Sending air in the wrong direction then making the air bend over 60 degrees once it enters the exhaust system right where the turbo exhausts will create one intense hot spot and pressure will rob power and cause detonation earlier.

Of course having the WG dump to atmo is preferable for high RPM which would allow more power with the right fuel. If I was purchasing anyones kit I would hope it comes with a flanged exhaust return pipe that I could choose to put on or not, this way keeping cars legally on the road by having exhausts passing thru the cat converter. The current design would make it hard to add a WG dump/screamer pipe without a harsh bend. I always try to never make air bend more than 45 degrees.

With the FMIC kits, my belief is that once it enters the core the air is swirled and pressurised and therefore would not matter where the exit point is. I do not know this to be exact as I have no proof however would assume so?

[David Buschur]

We have a customer that was in last on 9-16-2009 for some dyno tuning. He brought in a car he had bought and was tuned elsewhere. I re-tuned the car with the combination that was on it, pump gas with a Snow Alky injection kit, the car had stock camshafts in it at the time. Important things to know about the car at that time:

Built 2 liter, builder unknown
Stock head
Stock cams
AMS GT35r kit
Ebay FMIC
Single Walbro pump
PTE 1000cc injectors
3" turbo back

I tuned the car at 29.96 psi of boost with the alky turned on. The max power was 435 with 368 ft lbs. After tuning the car as usual, I told him what I thought and what he could do to improve the car. I suggested our cams and our FMIC as two large power adders.

With the Ebay FMIC on a 4th gear pull the AIT's were:
Starting at 2800 rpm-95 degrees F
Ending at 7700 rpm-134.6 degrees F.
A 39 degree increase.

Obviously this is not good for making power.

Today the car came back. The car has had some changes that I learned along the way as I was tuning it. Here are the changes:

Perrin FMIC
BR Stage 3 cylinder head
Kelford 272 cams
Alcohol kit no longer in use

After a few pulls I noticed the AIT's were getting climbing. That's when I asked what it was and he told me a Perrin FMIC. Then as the conversation went on he told me I suggested he changed his Ebay one last time he was there. I asked why he didn't get our Race FMIC, he said he got a good deal on the Perrin and didn't want to wait on ours..........
The conversation went on to the cams, again asked why ours didn't get put in.............

The only thing that was done as I suggested was to remove the alky kit.

I told him that in 3rd gear the AIT's were climbing quite a bit but we'd wait and see on a 4th gear pull what they did before determining if he should still be looking for another FMIC. After the initial tuning was done in 3rd gear I made the 4th gear pull.

Starting RPM 2805 with an AIT of 75.2 degrees
Ending RPM 8133 with an AIT of 122 degrees.
A 47 degree increase.

This is no better than before, actually worse and I'm surprised as I THOUGHT in the past when I had seen a Perrin on a few cars they worked well.

The power on the other hand with the head/cam swap even without the alky kit went up to 500 whp and 389 ft lbs. There were some decent losses down low but over about 6000 rpm the car gained a lot of power.

If any of you have had me tune your car with the AEM on the Perrin FMIC please shoot me a PM, I'd like to go back and check the logs as I feel something has changed, maybe they aren't using the same core they use to, I don't know. Mechanically this car was great, power was great, just the AIT's were through the roof and it is nice and cool here today.

[tscompusa]

David: Im swapping out a old school PERRIN for your RACE CORE + LOWER PIPE so I will let you know what results I receive from this swap. I only made 522/460 at cbrd in 97f with a fp black at 39psi and full buschur 2.3 motor with all bolt ons imaginable. This should give us a good idea how shitty the perrin really is.