DriBak

I'm new to LS1 took my car 2000 A4 Z28 to get dynoed, I'm running lean 13.9 all the way across. What do I need to do to "richin" up before I go with a dry kit?

Matt@HSW

iTrader: (14)

Are you throwing any OBD2 error codes (SES Light lit up)?

gollum

iTrader: (1)

Nothing, the NOS 125 hp Dry kit was designed to work with stock tuning. Your tune is stock right?

charlie c5

iTrader: (6)

A good tuner can richen you up a lttle..

DriBak

I'm not throwing any codes. I don't think my "tune" is stock because my car has gears 4.10's and the speedometer is accurate, and also my AIR and EGR are gone and no codes are present, so wouldn't someone have to tune those mods ? would a stock tune run that lean? I have a lid, exhaust cut out, 4.10's emissions delete, SFC's and "shift kit" The broker I got my car from didn't know any history of my car or didn't want to admit it. I know my car was "raced" B4 because it had shitlods of rubber behind both rear tires it has all the free mods + gears and shift kit and it has an air bag in the right rear spring, kind of think she has already been sprayed because she had NGK TR6 plugs and the jack and spare were MIA. Me and some friends are gonna install a dry nitrous kit, but I'm concerned with the "lean" factor right now.
Thanks feels free to email me off board to conserve bandwidth
deucetorres@gmail.com

gollum

iTrader: (1)

Moderator Robert56 has lots of know how concerning dry systems. You can PM or Email him your questions.

white2001s10

iTrader: (4)

There may be a problem. First find out if anything is wrong, and why you're running so lean.
Normal stock falls between 11.5 and 12.5 range for the AFR.

Matt@HSW

iTrader: (14)

Yeah, your PCM has a tune more then likely. It could be from a handheld (predator, hypertech) or done via edit or HP tuners. At this point who knows what has been done to it. You could take it in and see if the PCM can be read and then go through and see what has been changed. Or you could start from scratch, take it to a dealer and have it re-flashed to stock and then get it retuned for the mods you have, hopefully you know about most of them.

Matt

strokedls1

iTrader: (1)

I would take it to someone and get it tuned before you spray it. If it is that lean on the dyno it is even leaner on the street with a real load. Check the fuel pressure under load and check to see what the injector duty cycle is before adding on nitrous. I would think some bigger injectors would be a good idea with a dry shot. The 2000's came with the smallest stock injectors 25lb/hr. They are not enough to support a bolt on car with nitrous on top of it. Had to have been tuned to delete those codes with a real tuner cable. Did you try to dyno through full exhaust to see the a/f difference?

Robert56

iTrader: (2)

I agree with whats been said. You need to data log and find out whats been changed. If it's a handheld tune it prob had timing added (which is not good on the spray). 13.9:1 is to lean even n/a imo. The simple way is to set your WOT Power Enrichment Mulitplier to end up with a/f you want. Any good tuner can do this. Like was said make sure your not running out of injectors. What HP did you get and we can tell what size injectors you'll need with the spray on top of that.
Robert

DriBak

Thanks for the input, I don't want to TNT by newest toy, I expected more from the dyno, put out 300.2 HP and 327.1 TQ

strokedls1

iTrader: (1)

Well at almost 14.1 a/f you are not going to make good numbers. You probably had a good amount of detonation and lost timing from knock retard. You have to get the car straightened out before adding on new problems. I would swap to some ford svo 30 injectors and tune it. You'll be amazed at the difference in response with a proper a/f and timing. Maybe someone local with an hp tuner cable can help you out.

gollum

iTrader: (1)

1998 GM F Body service manual states "when LS1 engine is fully warm the AFR is 14.7 to 1".

Matt@HSW

iTrader: (14)

Correct, that's optional A/F for part throttle. IE: driving around town (all production EFI engines are set up for 14.7). It's not normal for WOT A/F.

gollum

iTrader: (1)

What is stock WOT A/F ?

Matt@HSW

iTrader: (14)

Bone stock low 13's.

00formLs1

i did mine at wot around a week ago and it was 13.5 -13.9, and driving around it was 14.9-15.0, my mods in sig.

Robert56

iTrader: (2)

The rule used to be 12.6:1 was optium a/f. Some of the top tuners are saying the ls1 makes more power with a 13 to 1 ratio n/a of course.
Robert