Ausmith

I have half a day set aside.

I did some baseline tuning last year, but the motor is completely different now...
B18C1, JDM ITR slugs, Mugen Gasket, Skunk Manifold, bored TB, JDM DC header, AEM 3" intake, CTR cams, ITR valve springs, 250cc RC injectors

No adjustable cam gears at this time. Just FPR, VAFC, and base timing to mess with.

Running on a Dynapack with Motec wideband O2
Here is what I was thinking:
Run 1:Baseline run. I want to get a feel for the A/F so I can get the pressure set correctly.
Run 2:Validate fuel pressure setting such that highest A/F ratio point is in decent spec.
Run 3 and Beyond: VAFC fuel trim

Any ideas on VTEC cross over? The chip is set at 5500rpm. Obviously I have some control with the VAFC. I was thinking of doing one run with the cross over set as high as it will go and see what the low lobe graph looks like and then set the cross over as low as it will go and compare the two graphs. I also have to take into consideration the GSR gear box which has fairly tall gearing.

Ausmith - who is hoping he can produce at least 175whp.


[Modified by Ausmith, 8:28 PM 5/8/2002]

Ausmith

I just did some calculating on gear ratios and vtec cross over...

On the GSR gearbox 1st gear is 3.23 and second is 1.90 - which equates to a drop of 1.70:1 on the shift from 1st to 2nd. (found by dividing 3.23/1.90)...

With that in mind if I rev to 8500rpm in first gear and shift to second, the RPM is going to drop down to 5000rpm!

Assuming I don't want to take rev above 8500rpm the highest vtec point I can use is 5000rpm --> also assuming that I don't want to fall out of vtec after shifting.

Pretty interesting eh. I see why the vtec is 4400 on an P72 ECU. If you rev to7650 and shift to second it drops to 4500rpm....

I guess that answers my question.

sgT

why did u get 250cc injectors?

Ausmith

LOL - I just had my stockers cleaned/balanced and the average flow rate ended up being 249cc versus 239cc before cleaning.

LOL- you were probably like WTF. What a moron!

So anyway - any suggestions?

I just got done breaking the motor in by doing a handful of 2 minute full throttle full rpm runs on the freeway in 5th gear. I read somewhere on this board that it worked quite well.


[Modified by Ausmith, 9:36 PM 5/8/2002]

sgT

Who does that?

AssPenny

That guy with the CTR pistons

Reid

Now complete the process and post pics of your blown motor and swear at us when we offer help.

J/K

Let us know how it goes on the dyno.

sgT

lol

Ausmith

Damn you all. I follow advices now look at my motor!


How's that Reid?


[Modified by Ausmith, 9:51 PM 5/8/2002]

sgT

Reid

I'm sorry, but I find that hilarious.

Reid - who only has to spend 3 more hours on honda-tech, err--- at work...

Ausmith

How did that valve get turned upside down?
Here's what mine looks like for real.... and I gave it a real easy 1000 mile break-in.

Reid

Hey Steve,

What caused your block to go bad?

sgT

oooooh, pretty resurfaced block....

sgT

thats not mine.
on that motor a crower retainer failed. valve dropped and broke the head off
and well, you can pretty much guess the rest

owen_the_soyboy

Dirt

Where is the dyno session? Specifically.

Ausmith

Eau Claire @ Henry's joint. It's a little far, but he's a buddy and it's a dynapak. Wanna come? Sammis and I will be leaving earlyish on Saturday morning and returning promptly after the session.

hybrider

lol




[Modified by hybrider93, 6:30 AM 5/9/2002]