My dyno graph finally posted...

[Silver Streak]

Here it is...143 hp and 157 ft-lbs of torque. Notice the spike of power at around 3700-3800 RPM? That spike can actually be felt at WOT...pretty cool that it showed on my dyno results. I'm thinking it's more of a loss of power before 3700rpm, it could've been my cheap cone filter...any ideas?

[DaksGT]

Also notice that your torque drops and then picks up at the same point as well. Might be that ect stuff that Ratko has, other than that no clue. Or if your cars have a b-valve that might be it too.

[EKam]

I really like your torque figures Hen. I wish 1MZ-FE can reach its max torque at 3K.

[Phi]

Here's Ratko's for comparision;

[F1 Chris]

actually 1MZFE's do have a very straight torque range from 2k - 5k.

[Silver Streak]

On 2001-12-24 00:30, DaksGT wrote:
Also notice that your torque drops and then picks up at the same point as well. Might be that ect stuff that Ratko has, other than that no clue. Or if your cars have a b-valve that might be it too.

I have no idea what's in our throttle body but I've heard of people taking out their butterfly valve to increase performance...don't know if that really works.

Someone on Camryman said it was the ACIS kicking in. Basically the ECU sends a signal to shut down the VSV...which in turn closes the vacuum to an actuator, which in turn, opens up the air control valve...which shortens the intake runner length.

[Silver Streak]

On 2001-12-24 00:49, elegantcam wrote:
I really like your torque figures Hen. I wish 1MZ-FE can reach its max torque at 3K.

Well, your car has traction control right? He just basically floored my car after hitting 2nd gear, so maybe that's why...I'm sure your car can get those numbers on the road...but yeah, I like that I can acheive those numbers at such low rpm...it's no BMW, but I'm happy with my results for a 10 year old car. :smile:

[SE V6]

You cannot take the butterfly valve out of the TB. This controls (via ecu) the amount of air that goes into the engine. What you could do is to bore out your TB and put a bigger butterfly valve in. Usually, a 2mm bore is the norm depending on your application. And it would also be adivsable to bore out the intake plenum where it meets the TB if was 'matched' to the stock TB. It's important to match port the plenum to the TB if you get it bored (air flow characteristics).

[Jzs147-RR]

Very nice power for a 10year old beast.I dont think that overboring the TB will give us much power without doing a full port and polish to the whole intake plenum and air runners.I had that all done when I was NA and it gave me like 15 HP.BTW that is some good low end torque.

[SpectraBlueCam]

On 2001-12-26 12:23, CamryRR wrote:
Very nice power for a 10year old beast.I dont think that overboring the TB will give us much power without doing a full port and polish to the whole intake plenum and air runners.I had that all done when I was NA and it gave me like 15 HP.BTW that is some good low end torque.

I agree. Based on the project articles in Sport Compact Car, an overbored TB doesn't do much as a stand alone mod. Dyno tests show 1hp gain or none. As for the intake plenum and runners, they use a process called extrude hone.

[speedemn]

ECT has nothing to do with it.

But Henry, when you drive on the road, at 3700 RPM, do you feel it bog a bit and then pick up again? How does that dyno translate on the road exactly?

On 2001-12-24 00:30, DaksGT wrote:
Also notice that your torque drops and then picks up at the same point as well. Might be that ect stuff that Ratko has, other than that no clue. Or if your cars have a b-valve that might be it too.

[Silver Streak]

On 2001-12-27 12:40, speedemn wrote:
ECT has nothing to do with it.

But Henry, when you drive on the road, at 3700 RPM, do you feel it bog a bit and then pick up again? How does that dyno translate on the road exactly?

Yeah, you're right about the ECT...

Hmmm, wouldn't say that I feel the car bogging down, but I feel the car picking up speed at around that RPM...I mean, the car still moves quite decently around 3000 to 3700rpm, but it's above that where I feel the kick. haha, it's like it's VTEC kicking in... (actually, i've never driven a honda with VTEC).


_________________
Henry

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<font size=-1>[ This Message was edited by: Silver Streak on 2001-12-27 17:06 ]</font>

[speedemn]

Hmmm that's hard to explain. Who did your dyno? If it was Jeremy, he usually has an answer for anomalies like that in a dyno. Did any of the guys at DPE give you their ideas on what it could be?

I don't see why it should dip. There are no new variables that kick in at 3000-3700 that aren't present at the other RPMs.

Yeah, you're right about the ECT...

Hmmm, wouldn't say that I feel the car bogging down, but I feel the car picking up speed at around that RPM...I mean, the car still moves quite decently around 3000 to 3700rpm, but it's above that where I feel the kick. haha, it's like it's VTEC kicking in... (actually, i've never driven a honda with VTEC).

[Silver Streak]

On 2001-12-27 15:44, speedemn wrote:
I don't see why it should dip. There are no new variables that kick in at 3000-3700 that aren't present at the other RPMs.

Read my post near the top, there's that ACIS thingy that happens at 3700 rpm for the 3VZ engine...

Jeremy was there, but he didn't do the dyno...they said dips happen but they weren't too sure.