b18.

Manly men.

Tom-Guy

AFRs are only inferred by exhaust oxygen content - in no way shape or form are they actually measured. The only way to observe what is going on in the chamber is to look at the chamber and the plug. It's what I'd go off of.

I've had idiots argue with me about that over the years, Doug @ Hyundaidata is a big anti-plug reading mouthpiece. Look at any "3000" whp Outlaw car, you can't dyno that ----. You take it to the track and look at timeslips and plugs.

b18.

There's only so much that the resistance of the passing fluid could tell you isn't there?

Not to mention it's the average assessed by the sensor, that would give you some kind of inherent sensor error.

D16Y8-Z6

90 ft lbs on the arp's on my D.

No HG probs yet.

miss-piggy

I have no idea what your point is. You run your car rich and leave the timing advanced? Since fuel really doesn't cool combustion temps(all that much), all you are doing by running rich is wasting fuel so that you can have combustion take a longer time. What works works, but richer+more timing is more or less the same as leaner + less timing.

As for E85, your numbers are way off as far as fuel consumption. Figure an average of 30% more fuel with E85 vs gasoline. Most people are actually tuning E85 leaner than they "should" as per E85's suggested best AFRs.

Last question, have you made the cam gear changes and done a before and after at the track? http://www.honda-tech.com/zerothread?id=1875921&page=1

hondacivc93

i havent made any kind of cam gear changes at all, stock cam gear.

hondacivc93

i made it to the track on sunday and was pretty dissapointed. my first time on slicks and i had some pretty abused 24" slicks. was on low boost trying to get it dialed in. first time on the line i realize i still have my 2step for street tires and it holds at 3500 rpm. ------- gay, i could barly even spin in the water box. with the full throttle launch at 3500 it would just fall on its face off the line. my best 60' with the slicks was around a 2.8 and i went 13.5 at 104. i did like 6 pulls like that and said ---- it and tried for trap speeds .

it wasnt getting any better, put my street tires on and did one more pass and actually had my fastest pass. went 13.4 at 117
wasnt the cleanest pass ive ever made and i tripped the finish lights spinning in third on those street tires. so i went for another pass and popped an intercooler pipe, said ---- it and went home.

Tom-Guy

No, not advanced. I leave the timing where it makes best power once the car is heatsoaked.



False. Try to run a turbo aircooled engine at 12:1 if you think fuel does not have a very large effect on cooling.


Wrong. You haven't done it a few dozen times, I have. You quote Jeff Evans, who is a bright dude, but both the 3xx whp D16 he tuned that are local to me came apart in six months because he tuned them with his B-series hat on whereas all of mine that I have tuned via my method are still running 1-3 years later. My method is correct, thanks.


Okay.


Yes, I have.

I don't have time or interest to read a bullshit HT thread further than the first five posts, but for a stock cam turbo B-series I never touch the cam gears either. For a stock cam D16 I always touch the gear, in fact I insist on it. D-series are not B-series and tech from one engine does not transfer to the other. Anything with aftermarket cams needs the gears played with.

vtecduck's D16Z6 only had "light cleanup" passes made to the head and deck, which resulted in his stock cam timing being 3.x degrees off. That's a half tooth off, if you think that isn't a substantial amount that has an affect on powerband, trap speed, dynamic cooling temps, etc, then you are mistaken. ALL D16 have these issues. By comparison B-series engines like the BRMS car, or Goforth's CRX, which have been apart several times and decked/milled more than once end up in the range of 0.5-0.75 degrees off. I know these figures off the top of my head because I have a Mike Belben cam degree fixture (since waaaaay before Skunk picked one up) and I ------- degree everything I touch, whereby I acquire a working knowledge of how things and how much things are affected by mechanical timing changes. You don't. You read some forum posts and throw them in my face.

As far as track times, I've only babysay one at the track. Blossfield's 93 Si with speaker box and every option runs consistent 7.6-7.7 at Shadyside Dragway, has three years, and does so at the 300 whp level. He has cheap Goldline drop springs, no traction bars, and 23" slicks.

JoshMO

When it is my time... I WILL drive my heap to asheville and have you tune my ----. That is all.