It's nice to be yelled at by track officials and have a nasty "Slow down, you don't have proper safety equipment" message written in big black magic market all over your time slip ---- when you're still running straight pump gas.

Good night at the track tonight, however, due to timing, and another 3S breaking down (actually 2 3S' breaking down), I only got 2 runs in. Sucks because I still think the car has MORE left in it with a bit more boost and a decent launch.

I could not get traction on either of the 2 runs. My datalogs showed me getting off the throttle 2-3 times each pass during 1st gear trying to hook up. I was planning on turning down the 2-step slightly but I didn't have time tonight to mess with it unfortunately. I've cut 1.6x 60' foots before, but can't seem to get them anymore. The car just spins, spins, and spins in 1st gear even with my Toyo Proxies which are very grippy tires.

Anyways. Here's the low down. Straight pump gas, 19psi (turned down slightly), et al.

1st pass:
60': 1.779 (yuck!)
1/8: 7.503
MPH: 92.59
1/4: 11.56 (ties personal best I made at NG07)
MPH: 123.54

2nd pass:
60'1.756 (yuck!)
1/8: 7.423
MPH: 93.16
1/4: 11.430 New personal best
MPH: 125.78 New personal best (I think? I might have trapped faster before)

That run brought me the wrath of track officials. What was great was beating up on two domestic muscle cars BOTH times.

I think with a decent 60' and a pound or two more of boost, the car has 11.2 or 11.3 on it with straight pump gas (dare I say even 11.1 with a PERFECT past and perfect launch?). It seems to really be hauling ass.

I might try to hit the track again before the end of the season, but I want the car in good shape for my HPDE Road America event this October.

AME log looked really good. AF was constant throughout 3rd gear. Noticed I'm a bit leaner in 1st and 2nd gear than 3rd gear for whatever reason, but nothing major (I've been noticing this to be a trend on my setup - probably a load variance). Before the event, I did have to add a noticeable amount of fuel between 7300-8300 rpms as it was really leaning out.

AND... having my O2 finally calibrated properly is making a huge difference for me when viewing logs. I can't beleive I let that slide as long as I did... Oh well.

I think it's funny the car is making this kind of power when Josh's "rip your heart out and stomp all over it dyno" kept nagging me the last dyno visit up there and left me a bit bummed out to be honest. Just goes to show, #'s don't mean SHIT. I've dynoed high, I've dynoed low, who the fuck cars as long as the car is fast I guess.

Good times. very excited. Looking forward to road racing in two weeks. One of these years I'll finally dump C16 in it and run that AEM map instead. Of course, track officials might wise up to that right away so I will need "safety equipment" before that happpens.

Regards,
JR

Nice runs.

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'94 vr4- Now with extra slowness

Who's 3/S's ended up biting the bullet?

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1991 Stealth RT/TT

Jackie ended up with tranny/axel problems (TBD), and someone we didn't know that had a white 1G TT ended up with some unknown problem that was stranded at the end of the track.

JR

Is she still running the N/A MTX? I'm curious how its holding up, mine seems to be fine so far however I've never taken it to the track yet.

-Nick

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1991 Stealth RT/TT

Hey Jesse. What tire pressures are you running? Have you considered driving thru the waterbox and doing a burnout? Sounds odd, but this, combined with dropping the tire pressure to about 22psi actually helped me immensely on my white DR500 car.

Also, did you do a run without using the 2 step? Might be hurting you more than helping.

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06 Blue EVO 9

With the minimal amount of runs I've made, I haven't had time to make too many adjustments. I'm just getting used to the car and dragging it in this configuration. I think it'll take another 10 passes or more to get everything dialed in for a really good pump gas run. I have plenty more that can be adjusted on the 2-step, tires, tune, shift points, etc. Considering the first pass I made back in June was a 12.1, I've dropped it down to 11.4 with only 10-12 passes, using the exact same setup, so with a couple more, who knows what might happen...

I have a litlte bit of knock/noise I need to get rid of above 7400rpms which is nagging me. Only happens in 1st gear gear, and a tiny bit in 2nd gear... 3rd gear is clean all the way up to 8000rpms. Why the lower gears with lower load is giving me more knock than 3rd gear is, I'm not sure yet with the exception of a guess it has something to do with my map sensor bouncing around so much and different load (pressure) values having to change more much quicker through 1st and 2nd gear than 3rd. Engine just may not like so much variance that fast. I'll have to replum my MAP sensor to fix it though and I'm not sure when I'll get around to doing that.

JR

You have that sensor mounted on the intake or is it positioned elsewhere with a vac line going to it?

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06 Blue EVO 9

MAP is in the manifold. The current plan is to unplug it from the manifold, and tap it into the FPR line to minimize the pulsing. Mark W ran into this same thing and he found that tapping it into the FPR helped filter the signal alot better than when his MAP was plugged right into the manifold.

I'm hoping this clears up the engine noise (knock perhaps) in the upper rpms of 1st gear (and some noise in 2nd). I have a hard time believing it's real knock as a result of the tune as 3rd gear is always always fine especially since the car is under more load then. I just have a hunch that the AEM is constantly bouncing around between cells so fast at 7300rpms because the load (boost pressure) is wrong and it's jumping timing like crazy causing some strange stuff to happen... Knock.. misfires... who knows.

I'm not sure when I'll get around to fixing it. Have Road America next weekend, not very concerned with fixing it before then since I'll only be in 3rd/4th gear the entire time and the car behaves much better in those gears.

Anyway, that's the story. I want to hit the track again so bad right now. I think I shave some more time off.

JR

It makes sense if you really think about it. Depending on which valves are open, you get all different kind of turbulence in the intake plenum from the "air walls". Add larger turbos to that, and you probably get some odd flow patterns. It'd be cool if we could find a way to actually see the airflow inside the intake plenum using smoke.

That's one idea anyway.

Another one would be to look at your air intake temps. Sitting there burning your tires instantly kicks up the heat under the hood which doesn't clear out until you get moving and some cool/fresh air gets under hood.

This was something I observed on Aaron's car that night we went to GLD and he had crazy knock in 1st and 2nd. Never noticed it before because all my cars had ARC2s with a fixed IAT. Turning the radiator fans on helped resolve that issue.

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06 Blue EVO 9

It's definitely not the AITs. They are constant throughout 1st-3rd gear.

I'm planning on replumbing the MAP sooner or later and seeing how this might change the level of noise up top in the lower gears.