I have a serious detonation problem with my setup.

Current setup.
*D15b7 engine with D16z6 intake mani/TB and injectors.
*Apexi turbokit GT intercooler.
*Vortech FMU (it should be 12:1)
*missinglink
*Bosch inline 250lph highpress fuelpump. *(stock intank).

The setup is running the stock 6psi.

The car detonates from 4500/5000 RPM up to redline.
After each pull the detonation gets stronger.

I have tried a walbro 255 highpress intank pump (more det)
I have place new platinum plugs (-2 colder).
Retarded the ignition a few degr.

I don't get it...the car should wayyyyy rich by now but stil detonates.
Please help.. wats going on???

I live in europe and i'm running 95 octane fuel...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hardcorehonda &raquo;</TD></TR><TR><TD CLASS="quote">I have a serious detonation problem with my setup.

Current setup.
*D15b7 engine with D16z6 intake mani/TB and injectors.
*Apexi turbokit GT intercooler.
*Vortech FMU (it should be 12:1)
*missinglink
*Bosch inline 250lph highpress fuelpump. *(stock intank).

The setup is running the stock 6psi.

The car detonates from 4500/5000 RPM up to redline.
After each pull the detonation gets stronger.

I have tried a walbro 255 highpress intank pump (more det)
I have place new platinum plugs (-2 colder).
Retarded the ignition a few degr.

I don't get it...the car should wayyyyy rich by now but stil detonates.
Please help.. wats going on???

I live in europe and i'm running 95 octane fuel...
</TD></TR></TABLE>

Retard a few degrees, exactly how much
Also i would not use platnium

 

i really don't know anymore.. we have tried so much..
my frends are running the platinum plugs for over 3 years now...
never had any problems with them.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hardcorehonda &raquo;</TD></TR><TR><TD CLASS="quote">i really don't know anymore.. we have tried so much..
my frends are running the platinum plugs for over 3 years now...
never had any problems with them.

</TD></TR></TABLE>

True..........already tried 98octane fuel? Tried almost anything this week and still det.........quite fast though....

 

Does the fmu actually raise the pressure under boost?

If so how high?

 

i don't own any electronic fuel press gauges.
Theres a mechanical fuelpress gauge under de hood but that won't be any good while driving 50+ mhp.

I switched over to 98 octane en theres no notaceble detonation but the car runs quite HOT.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hardcorehonda &raquo;</TD></TR><TR><TD CLASS="quote">i don't own any electronic fuel press gauges.
Theres a mechanical fuelpress gauge under de hood but that won't be any good while driving 50+ mhp.
</TD></TR></TABLE>

Rev the car while someone is looking at it under the hood. If reved high enough you should be able to put enough load on it see the pressure raise. I just don't see you detonating on 95 ocatane when we use 93 here and it's fine. Something isn't right.... mechanically.

 

What makes you think your detonating, pull your plugs and see what they look like.. It just doesnt make since .. you shouldnt be detonating

 

Your platinum plugs retain heat.....and they will promote detonation.

Try getting copper like the rest of the turbo Honda's.

If you THINK you are detonating, check your plugs for signs of it.

Also verify the FMU is working.

What is base timing set at?

 

what you can do, is get a handheld vacuum/pressure pump.

something like that, that you can hook up to your FMU and supply pressure at idle. This way you'll know for sure that your fuel pressure is increasing like it should.

I would honestly consider going the AFC hack route. Still not perfect, but much better than an FMU setup IMO.

 

AFC owns your FMU. Those things are junk IMO. No reliability and no consistency.

 

I have to ask...how do you know you are detonating? If you can hear it and have made multiple pulls, I am almost surprised your motor is in one piece...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ion_four &raquo;</TD></TR><TR><TD CLASS="quote">I have to ask...how do you know you are detonating? If you can hear it and have made multiple pulls, I am almost surprised your motor is in one piece...</TD></TR></TABLE>

this is a very good question.

Anyway, check to make sure that your fmu is actually working. The first time I put my fmu in (was an 8:1) was lean at 1 psi. Found out later that my fmu was not working. swapped in a new one and bam, full rich. Anyway, I'd check that out first.

 

ok i'm going to try telleing you guys in english what make me tink it's detonation.
Don't look at me poor english... remember i'm from overseas.

With thefist fuelsetup (walbro intank, FMU, d16 injectors, missinglink and -1deg normal plugs)the car detonated whel pulling hard in 2nd, 3rd and 4th gears from 4000 up to 6000.

It almost sounded like someone trew a hand ful of small gravel on the hood.
TIK TIK TIK TIK.

We took the plugs out and swapped them with -3 deg platinum plugs.
the tik tik sound moved to 5000 to 6000 only in 3rd and 4th.

We took te walbro intank out . put te stock fuelpu,p back and installed a bosch inline pump (right after the fuel filter).

stil the same sound.. only less notaceble

hooked up the fmu on a different vac source..

first 5 puls no detonation but after that... it came back..
i went home and the next day i put in 98oct...

EE8t was with me during te runs so that he also can veryfy the noise.
My mind plays triks on me when my car makes strange noises.


(maybe is stiupid Q... but can a bad fuelfilter do this? now that i think of it.. thats the one thing i didn't touch, during my previous setup and my current.

 

pull your plugs, and see if you have alot of white specs on them..

 

try J&S

 

here some pics of the old plugs (the one's that experienced most det)
NGK BKR6E






they are replaced by NGK VX BKR7EVX-11

 

i know that the J&S safeguard is a fine tool but you have to understand that such equipment is hard to come by in my country..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hardcorehonda &raquo;</TD></TR><TR><TD CLASS="quote">(maybe is stiupid Q... but can a bad fuelfilter do this? now that i think of it.. thats the one thing i didn't touch, during my previous setup and my current.</TD></TR></TABLE>.

Yes, big time, IT's recommended to change the fuel filter every 6 months or 10,000 miles. My car acks an *** when the fuel filter needs to be changed. Wants to stall out and all kinds of trash. Change that it may help.

 

I have had some of the same problems with my GSR. Mace sure to run a colder plug and as the rest of the guys say do not run platinum. Platinum has a higher resistance and does retain heat longer than other materials. Try running a NJK copper electrode plug..... Also dump the missing link and FMU. Do you have access to a dyno? What air fuel Ratio? Also do you have any sort of detonation managment like a btm? I got rid of the FMU - Missing link combo and it cleared up... good luck

 

I'm pretty sure it's your timing. With 6psi, I think you should retard timing around 4-6 degrees.

OR...get a BTM and run stock timing, and .5 degree retard per lb boost.

 

i was runnng normal ngk plugs. The platinum plug reduced the det.
my friends ITR turbo uses them also... (300WHP) no problems what so ever.

The plugs arent the problem right now..

 

HOw much timing did you pull? Do you even have a light to check it?? Too much timing will hurt you and detonate. Also lots of oil vapors in the combustion chamber will promote detonation also....so check that out, from the looks of that one plug it may be oil soaked.

 

Im pretty sure its det.........almost 100%. We tried one run and the tickeling noise became harder........we made some changes and we thought it was gone, tried again and it came back, maybe cauce of the engine heating up. It could be the fmu, thought bout that during a run......may be worth the try installing a different one.......dont know how the timing was set. He drives a simulair setup as I do, and I dont have any det at all. EGT's wont cross 650 celcius at wot.......seems rich to me......Then again, I will definatly hook up my v-afc asap.......

Change the fuelfilter and perhaps try another fmu.........then see what it does......

 

yehh!! if that setup runs on your b16a1 than it should just work fine on a d15..

We have the same FMU, BOSCHpump and missinglink.. all hooked-up the same way. (no vafc for me... but you don't have it connected eighter)