Problem with detonation HELP!!!
02-29-2004, 10:52 PM
#1
0.5 BAR
Thread Starter
Join Date: Oct 2003
Posts: 50
Problem with detonation HELP!!!
My setup is a garret T3 .42 .48 on a d15b7 afc hack (tuned rich)dsm 450 injectors. Im running a JohnnyRaceCar front mount. I have 93 octane gas in it (north east:thumbup
i bought some ngk 2 heat ranges colder plus, gapped to .28 and im boosting right around 7 psi. Now the only way i can get it to NOT detonate is by setting the timing at 9-10 BTC, anything higher then that it detontates. Now, this seems to be extremely retarded vs. a few other setups ive had, and i know im losing power with it retarded so much. Id like to run it at least 12-14 BTC, but it detontates. What should i check next?
i bought some ngk 2 heat ranges colder plus, gapped to .28 and im boosting right around 7 psi. Now the only way i can get it to NOT detonate is by setting the timing at 9-10 BTC, anything higher then that it detontates. Now, this seems to be extremely retarded vs. a few other setups ive had, and i know im losing power with it retarded so much. Id like to run it at least 12-14 BTC, but it detontates. What should i check next?
03-01-2004, 02:09 AM
#7
0.5 BAR
Join Date: May 2003
Posts: 127
Re:Problem with detonation HELP!!!
Yeah.. what c/r you have?
.... seems at end you'll have to invest into 'real' management (AEM, hondata....) to get rid of it in proper way... or atleast get BTM, and set it to almost 1 degree per psi.
I already said few times, and - unfortunetely for you - you are proof of AFC advancing timing.. and rpm's (3500-4500) at which that happens only prove that
.... seems at end you'll have to invest into 'real' management (AEM, hondata....) to get rid of it in proper way... or atleast get BTM, and set it to almost 1 degree per psi.
I already said few times, and - unfortunetely for you - you are proof of AFC advancing timing.. and rpm's (3500-4500) at which that happens only prove that
03-01-2004, 11:23 AM
#8
3.0 BAR
Join Date: Jan 2003
Posts: 4,401
Re:Problem with detonation HELP!!!
Originally Posted by Nick7
Yeah.. what c/r you have?
.... seems at end you'll have to invest into 'real' management (AEM, hondata....) to get rid of it in proper way... or atleast get BTM, and set it to almost 1 degree per psi.
I already said few times, and - unfortunetely for you - you are proof of AFC advancing timing.. and rpm's (3500-4500) at which that happens only prove that
.... seems at end you'll have to invest into 'real' management (AEM, hondata....) to get rid of it in proper way... or atleast get BTM, and set it to almost 1 degree per psi.
I already said few times, and - unfortunetely for you - you are proof of AFC advancing timing.. and rpm's (3500-4500) at which that happens only prove that
03-01-2004, 12:35 PM
#9
1.5 BAR
Join Date: Dec 2002
Location: Nashville
Posts: 807
Re:Problem with detonation HELP!!!
That sounds like my case too.
I was using TurboEdit and richened the fuel 8% over normal boost bin with 1.00 degree retard and it barely cut the detonation out. I'm using a starion FMIC too.. Here's a list of things I think is causing it:
1. Fuel Pump
2. Fuel Filter
3. High Compresssion (over 200psi in each cyl.) (186k miles)
4. HF Manifold not pumping the heat out properly
5. 2" exhaust
anything else? My distrib is turned FULLY towards the radiator and that's fully retarded... wow.
Spring break I'm replacing fuel filter, fuel pump, upgrading 2.5" race exhaust out the side and tuning it right... I should get it running right after all that's been done.
I was using TurboEdit and richened the fuel 8% over normal boost bin with 1.00 degree retard and it barely cut the detonation out. I'm using a starion FMIC too.. Here's a list of things I think is causing it:
1. Fuel Pump
2. Fuel Filter
3. High Compresssion (over 200psi in each cyl.) (186k miles)
4. HF Manifold not pumping the heat out properly
5. 2" exhaust
anything else? My distrib is turned FULLY towards the radiator and that's fully retarded... wow.
Spring break I'm replacing fuel filter, fuel pump, upgrading 2.5" race exhaust out the side and tuning it right... I should get it running right after all that's been done.
