My car currently has S2 w/Toys installed; however, I'm using the S0 PCM instead of the S2 PCM (log is in 4th gear).
I'm not currently using my PTP MAP/TIP clamp, but I'm interested in setting it up properly. I'm new to using the Wideband/Clamp tuning, so can anyone explain to me how to properly analyzing my logs to safely clamp the MAP/TIP sensors. (For example: What point in my AFR log should I monitor to properly set the clamp... near readline, shifting point 5500 RPM when it's at 10.8, in the middle when it peaks to 11.9, or at the lower RPMs when it's 12.9)
Thanks for any tips/advice you can provide!!!
All 3 of these are the same pull, but with the white (data read) line at different points in my log.
Depending on how aggressive you tune will determine your clamp. Anytime your under full boost you do not want your a/f to be leaner than 11.8-12.0 depending on how lean you want to run. If you run water injection you can safely run leaner, but without it gets hot and dangrous. I would say you have little to no room to clamp your car. But without seeing your boost there is no way to know. If you spike high then fall off bad like it looks on your logs all clamping will do is make the lean spike even leaner and the rest the same. That is why a fuel computer, Safc, FTM, Dtech are so much better, because you can lean out the rich points and leave the points that are lean or just right alone. A map clamp only effects the fuel while the boost is above the clamp level. Hope that helps. I will attach a log from my car to show you how a log with the FTM looks.
Randy
Notice at like 5500 i needed to pull a little more fuel as it deeps down to like 10.9, but the rest is all between 11.3-12.0
litle lean on the low end but thats the trade off with clamping, there is only 1 tuning dial so you have to make it work across the rpm band, send me the real file please rob@samko.com
looks like if you dont go wot under 3k you would have a nice clamp tune
Oh, and I run water injection... (my logs are with the W/I turned on)
I use a coolingmist 2 stage kit with 100psi pump. I have an M5 nozzle which activates at ~11psi and an M3 nozzle which activates at ~15psi.
I spike 20-21psi and quickly drop to 15psi by redline.
Based off my current log does anyone think it would be ok to go leaner by clamping (if so, what would be the leanest AFR to aim for with W/I), or should I swap the S2 PCM back in and then clamp with that instead...?
What mods do you have on your car? I'm just curious what method you're using to raise your boost... to compair with mine. I don't have the zeitronix map sensor yet, so I'm sorta guessing as to where my boost spike is at on my logs. But when I compair your log to mine, I can sorta calculate at what RPM/AFR point my spike occurs (relative to when you start WOT to when your boost spike occurs). I also noticed your AFR plot drops very quickly then rises back up after the spike occurs. Mine does almost the exact same thing, but over a longer plot range causing a more gradual change.
160 Thermo/80% sts with Booger bushings/S1/PTP WGA 21.8 ~ 14/Champion 570 (0.040)/Maxxfab 3" O2/V6 Needswings DP with elec flapper/Race inserts (zero wheel hop)/ Zeitronix wideband /Map clamp 4.47v/PTP FPR Medium (Installed and kicks A$$) PTP 55mm TB/QW DF FMIC
So stage 1 pcm...
I don't have a boost controller, just tighten down the wga for higher. You will want the boost sensor add on, just a nice thing to have. Yeah, I've shown my afr curve to a few people on here that I value as having the knowledge to form an opinion based on fact and they've all said that this looks great, could be possily .2 richer to be on the safe side. With the new PTP fpr mod coming out soon, it should bring my afr down some from the 12.6 at the beginning and a bit towards the end. I only floor it at night or early morning when it is cooler out just to be safer.
I would think that you'd want a leaner mix for your car in the 5100 rpm range when it dips to 11.4 - 10.9. But I'm in the belief that 12.5 is good at the start as long as it gets to 12.0 at the end when the load on the engine is higher.
didn't notice your sig was available... i checked your previous posts, but didn't see it so I asked. Now I can see it on your post at the top of this thread page. Thanks though.
Dan you boost looks great. Much less of a spike then fall than mine. Do you run water injection? You run 12.4-12.5 for like 500 rpm before it richens a little and in my conservitave opinion is a little lean if you do not have injection, if you have injection your golden. The a/f looks good other than the above mentioned. I would say your car is clamped to about 17-18 psi so the car never see's any more than that. I take it your car is stage 2? Your clamped at 4.55 volts, i can't remember off the top of my head what psi that relates to, but there is a map voltage table somewhere in high tech i think. Good data log.
Randy
Last edited by Back-n-Black : 10-05-2006 at 11:06 PM.
AutoForums.com is the premier network of enthusiast-owned
enthusiast-operated automotive communities.
We operate more than 100 automotive forums where our users consult peers for shopping information and advice, and share
experiences and opinions as a community.
Build it!!! Photo=Suzq044
Wood Frog's where the NW gets fast!!
Linear Mode
