so i took my boost up from 3 psi (i know hardly anything) to 7 and put alot more fuel into it via my SAFC well i was running WOT and around 5500 i heard a big bang and black smoke came out... car runs fine i checked the plugs seem to be ok. then i retarted the time a couple of degrees and still detonated could i have put to much fuel into it or do you guys have any other suggestions

 

fryed the ringlands, sounds like...... try a compression test.

 

i just changed the pistons and rings just last winter could they go bad already at 3 psi when i ran it at the track at 3 psi i had no problems at all soon as i boosted to 7 then i started to have a problem

 

afc's have adverse ignition effects that are increased when u "add fuel" ie. trick the map sensor,

and manually retarding the distributor wont solve that shizzzz.

time for uberdata or crome?
likely ur engine is wrek

 

how would i go to stop this problem....... ill do a compression check here later this week..... all i wanna do it get it through the summer because im going to strenghten bottom end

the only tuning thing i have is the safc
no crome or anthing

 

Detonation sounds like metal ***** bouncing around in your cylinders not a big bang. More than likely (Since the car is running OK) is that you heard a large under load misfire (I.E. Spark being blown out from incorrect gap). Close the gap on the plugs and ditch the AFC asap. Although I've seen BTM/AFC setups yield decent results there are way to many options for you to be using a POS hack.


Cliff Notes: Regap plugs to .030 and report back. Ditch Hack for freeware ASAP!

Phil

 

what do you think i should run instead of the SAFC i have a vortec fmu with the vaccum lines running from the FMU t-ed off to teh fuel regulated and intake manifold... will that suffice for only 7lbs of boost and me not using the SAFC

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94siludeturbo &raquo;</TD></TR><TR><TD CLASS="quote">what do you think i should run instead of the SAFC i have a vortec fmu with the vaccum lines running from the FMU t-ed off to teh fuel regulated and intake manifold... will that suffice for only 7lbs of boost and me not using the SAFC</TD></TR></TABLE>

I would buy a socketed ecu and run Uberdata or Crome. If you don't have the money for the socketed ECU or the means to tune the vehicle or at least put a safe basemap in it at least buy an MSD BTM. You need some means of controlling the amount of timing your engine is seeing.

Phil

 

i forgot to mention i have a MSD SCI ingnition system with blaster 2 coil and msd plug wires would that have any affect

 

where can i get crome or urberdata

 

http://www.pgmfi.org

 

ok i DLed it now how do i use it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94siludeturbo &raquo;</TD></TR><TR><TD CLASS="quote">ok i DLed it now how do i use it</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondaguyef &raquo;</TD></TR><TR><TD CLASS="quote">http://www.pgmfi.org </TD></TR></TABLE>

Read. All your answers + tutorials are there.

Phil