little help with FWD

[tgriffith]

on the computer system,,,,I havent took the dive for a stand alone system just yet,,,,,I may not,,,it just depends on testing Ive got to do,,,,,,,,,If I understand correctly,,the computer I have (ODB ) decideds what fuel curve to give based primarily on the water sensor so...... I borrowed a high dollar snap on scanner,,,,,unhooked the water sensor and hooked the wires coming from the computer up a 2 step module and started putting in different resistors to see what water temp it thought the computer was seeing,,,,,after i got a few done from 100 to 220,,,,,,I started making runs. I also hooked up an EGT guage to see how hot the exhaust was,,,,,,the reason I used a 2 step module was so later, I could put a swith on the shifter OR use an RpM activator to switch fuel curves in high gear......it seems to work fairly well,,,,,,,the one thing I did notice, at least on mine,,,is that its extremely consistent if and ONLY IF actual water temp is in the 125 range,,,,if it climbs past 140, it slows .10 and does not repeat, even if you try to run it at 140, it wont run the same thing twice,,,,,,,,,also ,,,it doesnt appear that weather bothers the car,,,,last run 2 weeks ago was 15.57,,,,,,,,,1st run this week was 15.57 with a 7 or 800 difference in adjusted altitude,,,,,,,,the egt was reading 1335@ the 1/8 and 1475 or so @ the 1/4 mark,,

[GarysZ24]

Originally Posted by tgriffith

on the computer system,,,,I havent took the dive for a stand alone system just yet,,,,,I may not,,,it just depends on testing Ive got to do,,,,,,,,,If I understand correctly,,the computer I have (ODB ) decideds what fuel curve to give based primarily on the water sensor so...... I borrowed a high dollar snap on scanner,,,,,unhooked the water sensor and hooked the wires coming from the computer up a 2 step module and started putting in different resistors to see what water temp it thought the computer was seeing,,,,,after i got a few done from 100 to 220,,,,,,I started making runs. I also hooked up an EGT guage to see how hot the exhaust was,,,,,,the reason I used a 2 step module was so later, I could put a swith on the shifter OR use an RpM activator to switch fuel curves in high gear......it seems to work fairly well,,,,,,,the one thing I did notice, at least on mine,,,is that its extremely consistent if and ONLY IF actual water temp is in the 125 range,,,,if it climbs past 140, it slows .10 and does not repeat, even if you try to run it at 140, it wont run the same thing twice,,,,,,,,,also ,,,it doesnt appear that weather bothers the car,,,,last run 2 weeks ago was 15.57,,,,,,,,,1st run this week was 15.57 with a 7 or 800 difference in adjusted altitude,,,,,,,,the egt was reading 1335@ the 1/8 and 1475 or so @ the 1/4 mark,,

I'm glad you're able to make a 2 step work in your car...I can't even afford the part, which now that I understand my set-up (my challenges in the 90's and early '00's, has created a car that if I lose a race it's primarily the fault of my judgement skills (which was how I managed to lose a race that I had a slight reaction-time advantage .057 vs .060), by taking too much win light.

[tgriffith]

larry,,,thanks for the "little gift " in the mail,,,,,,,,,,,,Please email me your address,,,,


I also want to thank everyone for their input and ideas .......I sometimes have a REAL problem in just overthinking my problems........

[larry dowty]

he you go pamlarrydowty@msn.com hope it works for you.

[Jim Wahl]

tgriffith,
Please email me at jimwahl@embarqmail.com. I hadn't seen this thread until today. I can help you a bunch I believe. I ran the Caddy for 18 years and had consistent 1.72 -1.75 "60 times with a best of 1.67. mine was an '88 2.8 LB6 125hp aluminum head motor. I have some things you might be interested in. Jim