Dyno'd at 167whp, 174wtq @ 8psi. It was wideband tuned for around 11.5:1 - 12:1.



Dyno Video
http://www.we-todd-did-racing....DE%3D

The setup is: d16y7 with 50k miles, greddy 15g turbo, big intercooler, stock base timing, 8-10psi of boost, 93 octane gas, colder plugs (2 steps) gapped to 0.030, msd external coil and distributor cap, rc engineering 440cc injectors, walbro 255lph pump, safc-2 set to the best it can get. And the MSD BTM which isn't doing **** except stealing power when it's on it seems. We didn't retard it at the dizzy. It's at stock base timing, and I never really saw a need for it. I tried it once (didnt have the BTM on at the time), but detonation still occured. It's the ignition timing that is being advanced I think, of course by the SAFC2, and my BTM is turned up ALL the way to the most retardation possible, I don't see what the hell the deal is.

I still think something is up, the hp number is a little low, I was expecting around 180. It's suprising that the torque is higher than the horsepower, seems rare among hondas. This is with the BTM set to it's highest level (about 3-4 degrees per psi) of ignition timing retard, and stock base timing. Detonation is still occurring, I'm not sure if it's the SAFC advancing the timing or if it's just carbon buildup causing hotspots. And that's where it's detonating? I set the BTM to 0 last night and it feels like it pulls alot harder now, and the detonation doesnt sound like it's increased, but its still a big problem.

The only thing I can think of is from running rich before I tuned the motor, it caused carbon deposit buildup and it's making hotspots and those spots are heating up when I go into high RPM and max boost. It doesn't detonate at all until it hits and stays at max boost for a second or two. Oh, and it might not even be detonation someone said on turbod16.com, but I'm fairly sure it is. I've never owned a turbo car before so I don't know 100%, but it sounds like Cat Bomb firecrackers except they are little metal bit's getting blown up inside a metal casing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Shocka1998LX &raquo;</TD></TR><TR><TD CLASS="quote">Dyno'd at 167whp, 174wtq @ 8psi. It was wideband tuned for around 11.5:1 - 12:1.



Dyno Video
http://www.we-todd-did-racing....DE%3D

The setup is: d16y7 with 50k miles, greddy 15g turbo, big intercooler, stock base timing, 8-10psi of boost, 93 octane gas, colder plugs (2 steps) gapped to 0.030, msd external coil and distributor cap, rc engineering 440cc injectors, walbro 255lph pump, safc-2 set to the best it can get. And the MSD BTM which isn't doing **** except stealing power when it's on it seems. We didn't retard it at the dizzy. It's at stock base timing, and I never really saw a need for it. I tried it once (didnt have the BTM on at the time), but detonation still occured. It's the ignition timing that is being advanced I think, of course by the SAFC2, and my BTM is turned up ALL the way to the most retardation possible, I don't see what the hell the deal is.

I still think something is up, the hp number is a little low, I was expecting around 180. It's suprising that the torque is higher than the horsepower, seems rare among hondas. This is with the BTM set to it's highest level (about 3-4 degrees per psi) of ignition timing retard, and stock base timing. Detonation is still occurring, I'm not sure if it's the SAFC advancing the timing or if it's just carbon buildup causing hotspots. And that's where it's detonating? I set the BTM to 0 last night and it feels like it pulls alot harder now, and the detonation doesnt sound like it's increased, but its still a big problem.

The only thing I can think of is from running rich before I tuned the motor, it caused carbon deposit buildup and it's making hotspots and those spots are heating up when I go into high RPM and max boost. It doesn't detonate at all until it hits and stays at max boost for a second or two. Oh, and it might not even be detonation someone said on turbod16.com, but I'm fairly sure it is. I've never owned a turbo car before so I don't know 100%, but it sounds like Cat Bomb firecrackers except they are little metal bit's getting blown up inside a metal casing.</TD></TR></TABLE>

Take out the MSD BTM and retard your timing 3 degrees at the distributor then get back to us. Also please post your AFC settings, hi and lo throttle.

 

The settings for my SAFC-2 are:

Low Throttle (10%)
1000rpm -48%
1600-7600rpm -38%

High Throttle (50%)
1000rpm -37%
1600rpm -38%
2200rpm -43%
2800rpm -42%
3400rpm -34%
4000rpm -26%
4600rpm -21%
5200rpm -26%
5800rpm -26%
6400rpm -30%
7000rpm -30%
7600rpm -36%

4 cyl
Throttle set to up and right
prs sensor 6in 6out

The settings might look a little wacky, but it's the best I could get out of my A/F curve with the AFC. Oh, and I don't have a picture of the A/F graph right now, he couldnt print it, so he's going to try to send it to me.

The BTM is a pain in the *** too, it ***** up the tach signal to my gauge cluster... so I can either have the gauge cluster tach working and no BTM or the BTM and no tach. The electronic tach on the SAFC works fine but still. I even tried tapping the BTM in at the dizzy but nope. Anyways, I'll try to get to the dizzy today.

 

hmm maybe it isnt knock after all. Trying doing something extreme where you know it shouldn't knock and see if that noise is still there. By extreme i mean pull about 5 degrees or so from the dizzy or fill up with some c16. If that noise is still there chances are it could be something else.

 

ttt

 

It can not be carbon deposit. Hot spot creates pre-ignition, the most damaging form of abnormal combustion. And you will not hear it. Knock is a common occurance with big injectors and SAFC. You will have to reduce your boost pressure for now.

 

It is your ignition timing way to much timing.

 

If his BTM is working then he's taking out almost 30 degrees of timing at full boost (3-4 degrees for every pound)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pollito &raquo;</TD></TR><TR><TD CLASS="quote">If his BTM is working then he's taking out almost 30 degrees of timing at full boost (3-4 degrees for every pound)</TD></TR></TABLE>

 

The BTM only takes out a max of 15 degrees. This helps save your exhaust valves...