So I hit the dyno yesterday...

[DAYTA]

I mostly wanted to monitor knocking conditions, but of course I also wanted to see how much the pulley upgrades (high boost + lightweight crank) and the water/meth added.

As a point of comparision, my initial S/C + I/H/C/E dyno was 251whp/190wtq with STD correction, 5 smoothing.


Here are the results. I haven't received the raw data from the shop yet, so this snapshot off a scanned PDF is all I have. When looking at them, refer to the numbers at the bottom of the page. The points on the plot reference engine speeds post-cutoff:





I hit ~276whp/211wtq with STD correction, 0 smoothing (5 smoothing should drop the numbers 2-3 hp/tq). On my best run, I basically made an additional 25whp/20wtq over the stock S/C setup with the pullies and water/meth, no tuning or other mods. This is about what I was expecting overall.

More importantly, we used a scan tool to monitor ignition advance and from what I saw there was no timing being pulled. From vacuum to boost at 3k, it started at 18 degrees and progressively went up to 22.5-23.5 degrees at redline. Coupled with my consistent dyno pulls (i.e. no erratic power spikes anywhere), it appears the engine is running smoothly. I took it to redline a few times yesterday, and it felt excellent.

What I found rather interesting was that I experienced no heatsoak whatsoever. Running more boost with a Roots blower, I expected power loss to hit after 4-5 runs. Instead, the car actually got STRONGER with each successive pull. My best runs (in terms of torque, anyway) were my last 2 (runs 9 & 10). Even after all of the pulls, the blower was cooler than the ambient temp. I guess the water/meth really does function well as a cooling agent.

One thing I will say, I now understand what people mean when they say 300whp+ in a FWD car is useless. I'm getting some serious torque steer under fast acceleration, to the point where I don't want any more power than I have since my car is being used as a DD. In fact, I'm fairly confident in saying that I'm done with power mods. My following phase(s) will now address other characteristics (most likely traction is next ).

[zhieson]

Very nice man! What do you guess your power is at the crank? How many more mods could you even go if you want to?

[06tsx]

WOW...... that's just sick man!!!!!!!!!!!! keep up the good work!!!!!!!!!!!

[Euro07Jazz]

so your not using a comptech blower? how do you increase boost? 1/4 run ftw!

[Ken7]

Damn! Stupid 07's!!!! I envy your car so much right now!

[chuson]

Originally Posted by Euro07Jazz

so your not using a comptech blower? how do you increase boost? 1/4 run ftw!

Comptech S/C is using Roots type blower. He stated that he swapped in high boost light weight pulley?

[CCColtsicehockey]

a complete writeup on everything need and cost would be amazing if you have time at all.

[DAYTA]

Appreciate all the comments, guys .

Originally Posted by zhieson

Very nice man! What do you guess your power is at the crank? How many more mods could you even go if you want to?

Well, it all depends on how efficient the tranny is, but a typical FWD car loses around 12-15% through the drivetrain. Assuming those specs, I'm somewhere between 313-325bhp and 240-250tq.

If there was a way to tune, I'm sure I could hit 290whp/225wtq corrected. Uncorrected, I think I actually hit 284whp/218wtq on the dyno yesterday.

Originally Posted by chuson

Comptech S/C is using Roots type blower. He stated that he swapped in high boost light weight pulley?

I actually swapped two separate pullies:

1) High-boost pulley from Comptech (3.1" diameter, I believe)
2) Lightweight stock diameter crank pulley from NST.

[TSXDET]

Nice write up. Keep up the good work. I still haven't installed my smaller pulley as of yet. I'll keep you posted.

[bluecarbonfiber]

hows your A/F ratio in the 3.1 pulley? i was thinking of doing the same in a few months but wasnt sure if i should upgrade the injectors to the 550 that comptech has out

[Varia]

As far as torque steer goes, I have noticed that it's really pronounced in the TSX as opposed to other cars I've driven. It's quite bad, actually. Does anybody know why the TSX is like this?

[rchip]

Where can i get 3,1" pulley? I have european model with comptech charger. Time of fun is off/// want some more. Give me please url.. You will see my rocket soon )))

[audioserf]

Originally Posted by Varia

As far as torque steer goes, I have noticed that it's really pronounced in the TSX as opposed to other cars I've driven. It's quite bad, actually. Does anybody know why the TSX is like this?

I agree, and believe it has to do with the overall light steering feel our car has. To combat torque steer manufacturers will sometimes implement heavier/weighted steering - the TL-S does this well, from what I hear.

[DAYTA]

Originally Posted by bluecarbonfiber

hows your A/F ratio in the 3.1 pulley? i was thinking of doing the same in a few months but wasnt sure if i should upgrade the injectors to the 550 that comptech has out

My A/F is actually close to perfect. With the high boost pulley + 175mL nozzle, I was in the low 12:1s and having some detonation issues. I then switched to the 225mL nozzle and my A/F dropped to mid 11:1s. As a result of going slightly richer, my detonation issues seemingly went away. I want to datalog and run some more test before I say that with complete certainty, but as-is the car runs butter smooth.

You can't use the RC550 injectors, or any injectors other than the OEM ones for that matter. In fact, the stock S/C setup simply modifies the stock 310cc injectors, including partially crushing the fuel pressure regulator to allow more fuel flow. The problem is that no one has found a way to reflash the ECU to recognize and control larger injectors. Hondata experimented with this and IIRC every time they cranked the car, the injectors flooded the engine, so it basically wouldn't even start. BigBen also tested out the RC550 injectors with a piggyback module (AEM FI/C) and ran into issues.

With my setup, my goal was to add more fuel to maintain nominal A/F ratios with the high boost pulley while keeping my fuel system within the specs of Comptechs direction. The only way I could think of to do this was to add the water/meth, and luckily for me it has seemed to work out well (so far).

Originally Posted by rchip

Where can i get 3,1" pulley? I have european model with comptech charger. Time of fun is off/// want some more. Give me please url.. You will see my rocket soon )))

You have to call Comptech (or CT-Engineering) directly to order one. They are rather difficult to contact, though. I was lucky because BigBen sent me his high boost pulley, so I didn't have to deal with Comptech directly.

However, keep in mind that you can't just add the pulley and call it a day. You have to compensate leaning out your mixture with the pulley by adding more fuel in one way or another. If not, your engine will wear down and eventually blow up.

[bluecarbonfiber]

so the comptech injectors are the same as the RC injectors? from what i thought they were different since they are straight plug in and the ecu recognizes them. i guess i must be confused with something else =/
well damn thats cool.. how often do you have to fill up your water/meth tank?