SloGN said:
Sharif
Also sharif get the car tuned some what and take it back with race gas in the car. alcohol is nice but it's not like race gas. injecting to much alky can the car lazy.
when i dynoed my car i done some testing.while at 20 psi of boost with race gas tring to tune the car i got the tune where i wanted it A/F wise. then on my last pull i turned on my alky to pump speed # 4 where it runs on the street for 20 psi. when i made a pull with the alky injecting on top of the race gas. the car lost almost 15 hp thats a lot of power. so i will say it again there is no replacement for race gas when wanting max HP.
Then you should have raised the boost up to compensate for the extra added fuel being injected by the alcohol, you would have made more power with the addition of meth, IF it wasnt rich!
If you add more fuel, then add more boost to get it right.
seeyabye -
Seems you are doing everything right, you have a good 02 sensor but the numbers are really low.. It could be lean, but if its blowing black smoke, then its rich... Pull the plugs, are they black or white?
You say the fuel pressure rizes 1:1 ratio, but have you tested to see if its flowing enough fuel, pull the schreader out and do a GPM test to see if your getting correct flow from the pump, you have pressure, but do you have volume? Does the fuel pressure stay up during the pass every single time?
Low 02s could be loose grounds on the back of the pass side head, but ive seen them drop to the 300's and lower, just check to see if they are connected really well.
Even thou the dyno sniffer was showing 13.1 ratio, doesnt mean it was working correctly....
Last june we experienced 2 cars with lean Air Fuels but the scanmasters were showing different and the egts were actually showing they were extreemly rich, One on racegas, one on meth... both had the translator boxes on them without extender chips, both running turbo tweak chips... both ran fine off the dyno...
Mine was first on the dyno and scaled down to 11.4:1 between 3800 and 4800, mine has the stock MAF with one screen removed. I locked my convertor and set the boost to 21psi, 25° 92 octane and SMC set to 6, 365HP/556TQ stock turbo,ic and 30# injectors.
If you dont have your convertor locked, then you will loose tons of power to the rear wheels, probably close to 100HP and 140TQ
I would test the fuel pump for Gallons per minute, varify the tranlator box is set right and working correctly, and check to see what the WOT timing is set to. Seems like the issue isnt fuel pressure regulator,chips,02 sensor, coil pack and module.
Could be a combination of maf sensor setup and weak fuel pump, that or you are just missing some power because your convertor is not locked.
What does it do on the street?
BW