I found my old data from EvoM: here is a cut/paste of what I had to say in September 2005 regarding the 4" thick garret fmic core vs stock evo8 fmic.
Quote:
Went to Englishtown tonight to test out the Buschur Race FMIC core.
My previous best mph with the stock FMIC 2 weeks ago at 30psi of boost was 120.6mph on 116 octane. tonight I ran 123.4mph on 28psi and 126.5mph on 31psi. The car has a PTE GT35R turbo, AEM EMS, fuel/exhaust/icpipes/tialbov & basic mods.
AIT is measured directly after the fmic:
Today at Englishtown:
At 31psi with the BR Race FMIC, ambient temp is 60*F. Starting line AIT is 71.6*F, top of 3rd temp is 75.2*F, end of 4th gear temp is 86.6*F.
That's a temp gain of 3.6*F in 1-3 gears and 15* in 1-4 gears.
2 Weeks ago at Island Dragway:
At 30psi with the stock fmic, ambient temp is about 78*F. Starting line AIT is 91.4*F, top of 3rd temp is 131.0*F, end of 4th gear temp is 138.2*F.
That's a temp gain of 39.4*F in 1-3 gears and 46.8*F in 1-4 gears.
This is an incredible change in AIT. The AEM logger was showing about 420whp with the stock fmic at 30psi in 3rd gear. The same math shows 480-490whp at 31psi with the new FMIC, granted there is a 18*F change in ambient temp that helped some. That's a solid 60-70whp gain from the combination of 1psi of boost, 18*F of ambient temp, and the FMIC. The 6+mph gain in trap speed indicates the ems logger is atleast somewhat in reality.
Below are the results of my testing on this subject on the street with pumpgas at 23.5psi. This was posted on a differnt thread previously.
I put the BR Race FMIC on today. I had to make some minor adjustments to the IC pipes, weld on a new section, and replace one bend...no biggie, install was done in less than an hour even with tig welding and tapping for the AIT sensor.
On to the preliminary results:
STOCK FMIC at 23.5psi boost ~75*-77*F ambient temp.
3rd gear WOT pull from 3000rpm to 8000rpm. Temp starts at 76.4*F and rises to 104.0*F at 8000rpm in 3rd gear. Temp gain of about 27.5*F on a single gear pull.
Launching from a standstilll ait is 78.0*F and rises to over 105.8*F by 7000rpm in 3rd. Temp gain of 27.8*F on a drag simulation of 1-2-3 gears.
BR Race FMIC at same 23.5psi boost ~70*-72* ambient temp.
3rd gear WOT pull from 3000rpm to 8000rpm. Temp starts at 71.6*F and rise to 71.6*F!!
Temp gain on the single gear pull is ZIP, NADA, NOTHING. I repeatedly tested this, and even went out to make sure the sensor was plugged in and in the ic pipe, as it was staggering.
launcing from a standstill AIT is 69.8*F and rises to 73.4*F at 7000rpm in 3rd.
Temp gain of 3.6*F on a drag simulation of 1-2-3 gears.
Im flat out amazed at the temp rise now, it's almost non existant.
on a side note, I didn't touch the hallman evolution MBC during the test, boost was exactly 23.5psi +,- .5psi with both intercoolers without adjustment. I know alot of people say they see a big boost change going to a fmic upgrade, I didn't see squat.
At 23.5psi with the stock fmic, today the best WHP the ems logger recorded was 393whp.
At the same 23.5psi with the BR Race FMIC, the best WHP was 421whp.
The calibration file and boost pressure were untouched. That WHP gain was completely from the FMIC and ambient temp change.
WHP when overlayed is consistently 15 to 20hp better with the new FMIC core at the same boost level. Much of the gain seems to be at the higher rpm, when the stock fmic core's AIT was rising up. Granted this is comparing a single gear pull.
At the dragstrip the power gain in 4th gear will be even more, as the stock fmic is totally heatsoaked and temps are over 120*F the whole gear. with the curve of the BRFMIC, I belive actual AIT at 24psi would be below 80*F all of 4th gear. 40*F is BIG.
This FMIC should make a very very significant power gain at the dragstrip, even more so than seen on the street on single or 1-3 gear pulls. The AIT will be the most different at the end of 4th gear.
My gut feeling is this FMIC core will be worth 2mph at street boost level, and as much as 4mph at 30psi. I guessed well!
