This gets me excited to tune my NA 1.8. Only I/H/E + the MS. Should be interesting. We have a dyno here on base so I'm going to hope it's cheap to use.

 

I set Both break points by what I though was best, and this section really doesn't make a difference. I let EGO correction take care of the low end and let myself take care of tuning the high end with smaller break points.

I'll upload the AFR targets later. However I was surprised to see Rick's car make the most torque at 12.3:1, rater than the typical 12.9-13.1

 

Tonight's latest tune seemed to smooth things out and it pulls really strong! I'm going to switch back to the BKR5E plugs that you tuned with just for ***** and grins. I'll have extra BKR5 and BKR6 plugs we can play with at Hallett.

In the meantime, I might make a couple pulls on a Dynojet for the sake of comparison...

(WTF happened to my sig???)

 

Noob questions, but is there not more power to be had at leaner afr's? And this is why we want to err on the slightly safer rich side, giving up a bit of power for safety?

I'll be installing (read screwing up my car) MS after Hallett and have been hitting the books in the meantime..

 

I don't think you'll ever see det even when going leaner and more advanced, there's just not enough load.

Seeing as you have a dyno that's the best place to tune this, just make as much power you can with as little throttle travel - yes there are pumping losses, but without EGR you can't get around that.

So tune for max light throttle low/medium load power and you'll make the best economy.

OTR I tune cruise by going leaner until the car starts to surge, then add fuel in. Then do the same with timing, then repeat until you're happy.

FWIW I run way more timing than 38* at cruise, BUT I have no idea if that makes more power or less than 35 - 40 would. I need a dyno to be able to tune it properly.

 

~13° extra advance at wot...i doubt this too.

 

Read Performance Fuel Injection Systems by our Friends Matt Cramer and Jerry Hoffman. This explained a few things I didn't understand about sensors and electronics, and confirmed a few things I saw on the dyno that I could not explain.

For the sake of this conversation, one of those is flame speed. 14.7 is generally considered the "fastest" flame speed. When you go leaner or fatter, the flame slows. When you go fatter or leaner, and find MBT on spark angle, you are targeting the "location of peak pressure" (LPP). I consider "safe" tuning more effective with spark angle than than AFR. Someone who knows more can chime in ad correct me at any time.

If you can plug-in MS and get the wideband wired in, I can tune the thing in a few hours. Jeff made good numbers in his car, I suspect we'll do better with the .5:1 lower compression on your engine.

sorry dude, but I can't believe these numbers. I've seen detonation in my daily driver on a stock computer and saw some on the dyno in both cars I tuned last weekend. I tune with det-cans for all the detonation going on which the "naked ear" can't hear.

I'm going to have both cars plug into my MP3 player with the det can output and record a few laps in the heat. Then I'll either listen or get really crafty and open it up in a basic audio-production program and look at the sin-wave for detonation.

 

Detcans here too, maybe your Texan heat has something to do with it, I dunno.

This is part throttle I'm talking about here, and part throttle only, nothing WOT or track based, merely cruising on the motorway/highway.

I'm seriously impressed you can get det at such low loads.

 

I have a noob question. Where do you guys clip the mic for your det cans?

Thanks.
-Raj

 

im gonna try and find someone local who knows enough and has enough knowledge of MS to take a ride and listen to my det cans, enless im completly missing knock there is none.

But im not arguing at all that i was making good power at those numbers, running the 23* feels the same if not better, i need to pay for some dyno time but i dont know of any good Steady state dynos local to me.

if it matters im running non electronic det cans, just the copper pipe hose and ear protector style.

 

Nipples.

I use the engine mount on the 1.6 and anywhere I can on the 1.8s. I have an old turbo manifold stud screwed into the power-steering hole and clip to that in my car.

 

...

 

Why not push E85?

 

It would be great if you could post that here. I have never heard detonation and I am not really sure what I'm listening for when I have det cans on. It would help a lot when I finally dyno tune.

I'm definitely following your ways when I get there.

 

+1. I've thought about adding a megasquirt and seeing what can be done with E85.

 

E85 probably isn't obtainable with enough frequency, especially for track cars.

 

That has been a problem for me indeed it stinks having to look for a gas station to fill up at. To be honest i always fill up at one gas station. Pain in the *** sometimes since the tank always has to be full enough.