Hey guys, name is Justin and I am from Middletown, DE. I have a 93s10 with a lt1/t56 swapped into it. I am excited to be here and hope I can meet some new ppl and all. Heres a pic of my truck and the motor.
Now i have just recently had trouble with the truck, took it to the dyno today and it put out 250hp/300tq to the wheels but the air/fuel ratio is not where its supposed to be, it idled at 16.1 and at 4k+ it really leaned out, if i can get a pic up i will of the chart, but I am not sure if the fuel pump is not effecient enough for the lt1 (i have my stock 2.8v6 pump in the tank still) or if injector(s) are bad. If anyone has input please let me know.
And if there are any guys around the DE area that tunes LT1's please let me know, i need to tune this baby, it shoudl be way more than those numbers are putting out.
Last edited by llorracs93s10; 10-30-2009 at 05:35 PM.
__________________ Justin
93s10 - 355lt1 - t56 - ported intake - erson 218/226 .510 cam - 1.6 pro mag RR's - 8.5 rear - more to come this winter (maybe a posi or gears or DR's or exhaust??? I dunno) ...
photobucket link-->http://s257.photobucket.com/albums/h...tor/?start=all
meh...lol. Thanks, if 15.1 on the 1/4 mile is fast, lol. that was my first pass ever and it was in this and the truck was not in a ny condition to run. I hope its a fast truck wheni am done wwith it, lol.
__________________ Justin
93s10 - 355lt1 - t56 - ported intake - erson 218/226 .510 cam - 1.6 pro mag RR's - 8.5 rear - more to come this winter (maybe a posi or gears or DR's or exhaust??? I dunno) ...
photobucket link-->http://s257.photobucket.com/albums/h...tor/?start=all
We can probably help with the tuning issues. Best thing you could do would be upgrade the dyno sheet scan to a larger size. What was the A/F ratio when it kicked into PE mode?
Looks like a good topic for LT1 Based Engine Tech forum. I'm going to copy your post there.
We can probably help with the tuning issues. Best thing you could do would be upgrade the dyno sheet scan to a larger size. What was the A/F ratio when it kicked into PE mode?
Looks like a good topic for LT1 Based Engine Tech forum. I'm going to copy your post there.
Good luck!!
Thanks man, I am going to try to get a bigger pic of it as soon as possible. what do you mean though by PE mode?
__________________ Justin
93s10 - 355lt1 - t56 - ported intake - erson 218/226 .510 cam - 1.6 pro mag RR's - 8.5 rear - more to come this winter (maybe a posi or gears or DR's or exhaust??? I dunno) ...
photobucket link-->http://s257.photobucket.com/albums/h...tor/?start=all
When you put the throttle close to the floor, it enters "power enrichment" (PE) mode. Instead of using the 14.7:1 stoichiometric ratio that it uses for part load/part throttle driving (good gas mileage, low emissions), it sets a richer target A/F ratio, as required to make more power and torque. Some people just call this "wide open throttle" (WOT), but the PCM will actually switches to the richer target A/F ratio based on a table in the PCM of throttle position vs. RPM.
Linear Mode
