TSXClub.com Forums - View Single Post - Phase 5

DAYTA · 04-27-2009, 01:45 AM

Well, it's essentially done. The tuner's wife had a baby a week before I was supposed to get my car tuned, so I had to wait 5 agonizing weeks. It went on the dyno on Saturday and is running strong, but not entirely done (more on that later...)

New mods in Phase 5:
- K-Pro
- 3.0" pulley
- Bosch 725cc injectors
- machined VTC pulley to 45 degrees
- 375mL/min water/methanol nozzle
- Hytech header
- Hytech cat
- modified B-pipe on Comptech exhaust

I made 304whp/225wtq on a Dyno Dynamics dyno. I will upload the scanned plot later. Many people consider these the "heartbreaker" dynos, but I'm happy with the results. For the sake of consistency, I will also be making a few more pulls on the Dynojet I had run before. The consensus seems to be that on average, Dyno Dynamics read 10-15% lower than Dynojets so I'm hoping to see around 338whp/250wtq which would be a HUGE improvement over the previous setup (3.2" pulley untuned, 276whp/211wtq).

Initial impressions are

. The car just pulls absurdly hard. Thanks to a good partial throttle tune, it's also as smooth as it was stock at any load. In order to prevent valve float, we kept the redline to 7600. Running a properly tuned setup with properly large injectors makes the engine feel so much more solid than before, and with the water/meth there is less chance of detonation issues at higher boost levels. Speaking with the tuner, he told me he kept it a conservative tune (timing limited to 21 degrees) rather than advancing ignition and cutting fuel to offset the water/meth. In fact, he actually tuned it the car to run without water/meth at all. By doing this, I can still run the car if there is an issue with the injection process (pump failure, nozzle clog, etc), yet I can also gain the cooling and octane boost advantages of the water/meth as the Stage 2 kit can inject progressively with boost levels. I won't be getting as large of a gain as I would have with a more aggressive tune (he thinks 15-20whp @ 26-27 degrees), but as this is my DD I need it to be reliable.

The Hytech header + cat just sings. I've mentioned it before, but I really disliked the raspy sound my car made with my CT header + RT cat. However, with the Hytech setup the raspiness is now completely gone, replaced by an insanely aggressive tone that is truly addicting. There were some minor fitment issues (initial bend on the primaries wasn't angled enough, needed to be heated and rebent), but it worked out fine in the end. I kept my Comptech catback as I believe it provides sufficient flow (2.5" B-pipe inlet to 2.25" Y-pipe to the mufflers). The B-pipe was shortened by about 1 foot, so this catback has to stay with the header+cat as one system.

Now for the vids:

Dyno pull (front)

Dyno pull (rear)

Acceleration run (25-70MPH, 2nd-3rd gear)

Acceleration run (40-115MPH, 3rd-4th gear) *Disclaimer* I don't normally speed this fast...

Issues
1) There is a bad buzzing sound that is coming through the speakers. It sounds to me like a ground loop issue, but I can't figure it out. The shop guys and I tried grounding the new ECU and the fuel rail, but nothing has worked so far.
2) Intermittently, I hit lean cut mode @ 3500 RPM (K-Pro senses high A/F ratio above acceptable limit and cuts fuel immediately, feels like car autobrakes HARD). It only activates at EXACTLY 3500 RPM and I'm not sure why.
3) Idle is a bit off. Even when the car is warmed up, it fluctuates between 700-850 RPMs. It hasn't stalled, but it's not smooth either.

Overall, barring the corrections of the issues above, I am more than satisfied with where the performance of my car is now. The way I see it, any more power than what I'm making would most likely require upgraded internals which I don't really want to think about (for now J). I feel like I'm at the limits of what's capable on a stock K24. I will post the Dynojet results once I get them this Wednesday

.

04-27-2009, 01:45 AM	#1 (permalink)
DAYTA My car whines...alot Join Date: Jun 2006 Location: In a TSX down by the river... My Ride: '06 S/Ced TSX (6MT w/ Navi) Posts: 377 iTrader: (1)	Phase 5 - essentially complete (including vids)... Well, it's essentially done. The tuner's wife had a baby a week before I was supposed to get my car tuned, so I had to wait 5 agonizing weeks. It went on the dyno on Saturday and is running strong, but not entirely done (more on that later...) New mods in Phase 5: - K-Pro - 3.0" pulley - Bosch 725cc injectors - machined VTC pulley to 45 degrees - 375mL/min water/methanol nozzle - Hytech header - Hytech cat - modified B-pipe on Comptech exhaust I made 304whp/225wtq on a Dyno Dynamics dyno. I will upload the scanned plot later. Many people consider these the "heartbreaker" dynos, but I'm happy with the results. For the sake of consistency, I will also be making a few more pulls on the Dynojet I had run before. The consensus seems to be that on average, Dyno Dynamics read 10-15% lower than Dynojets so I'm hoping to see around 338whp/250wtq which would be a HUGE improvement over the previous setup (3.2" pulley untuned, 276whp/211wtq). Initial impressions are . The car just pulls absurdly hard. Thanks to a good partial throttle tune, it's also as smooth as it was stock at any load. In order to prevent valve float, we kept the redline to 7600. Running a properly tuned setup with properly large injectors makes the engine feel so much more solid than before, and with the water/meth there is less chance of detonation issues at higher boost levels. Speaking with the tuner, he told me he kept it a conservative tune (timing limited to 21 degrees) rather than advancing ignition and cutting fuel to offset the water/meth. In fact, he actually tuned it the car to run without water/meth at all. By doing this, I can still run the car if there is an issue with the injection process (pump failure, nozzle clog, etc), yet I can also gain the cooling and octane boost advantages of the water/meth as the Stage 2 kit can inject progressively with boost levels. I won't be getting as large of a gain as I would have with a more aggressive tune (he thinks 15-20whp @ 26-27 degrees), but as this is my DD I need it to be reliable. The Hytech header + cat just sings. I've mentioned it before, but I really disliked the raspy sound my car made with my CT header + RT cat. However, with the Hytech setup the raspiness is now completely gone, replaced by an insanely aggressive tone that is truly addicting. There were some minor fitment issues (initial bend on the primaries wasn't angled enough, needed to be heated and rebent), but it worked out fine in the end. I kept my Comptech catback as I believe it provides sufficient flow (2.5" B-pipe inlet to 2.25" Y-pipe to the mufflers). The B-pipe was shortened by about 1 foot, so this catback has to stay with the header+cat as one system. Now for the vids: Dyno pull (front) Dyno pull (rear) Acceleration run (25-70MPH, 2nd-3rd gear) Acceleration run (40-115MPH, 3rd-4th gear) Disclaimer I don't normally speed this fast... Issues 1) There is a bad buzzing sound that is coming through the speakers. It sounds to me like a ground loop issue, but I can't figure it out. The shop guys and I tried grounding the new ECU and the fuel rail, but nothing has worked so far. 2) Intermittently, I hit lean cut mode @ 3500 RPM (K-Pro senses high A/F ratio above acceptable limit and cuts fuel immediately, feels like car autobrakes HARD). It only activates at EXACTLY 3500 RPM and I'm not sure why. 3) Idle is a bit off. Even when the car is warmed up, it fluctuates between 700-850 RPMs. It hasn't stalled, but it's not smooth either. Overall, barring the corrections of the issues above, I am more than satisfied with where the performance of my car is now. The way I see it, any more power than what I'm making would most likely require upgraded internals which I don't really want to think about (for now J). I feel like I'm at the limits of what's capable on a stock K24. I will post the Dynojet results once I get them this Wednesday .