i have an 01 L with x pipe flowmasters and k and n. can i just put a 4 lb pulley on it and be alright? and also if i get a chip what all would i have to do to the chip.

 

nope 4# pulley needs a chip burned for that mod....JR

 

You had better buy a chip if you get a pulley. Pulley alone will cause a lean condition. BAD Order a chip and tell the tuner you pick your mods, all of the Big three tuners are very good about asking your mods and what you want. If you still have $ left over buy the pulley, you'll love it.

 

You will need the chip for a 4# pulley.Some say you can get away with a 2# with no chip but I would not risk it.
The reason why so many guys on this board risk there warrantee for a chip is because THEY WORK AWESOME. It is like a whole new truck.It is a decision you will have to make.

VINNIE

 

I just put a 4lber and Superchip from Mike Troyer in my 2kL. Worth every penny. Best bang for the buck. You need a breather cap and boost bypass, too.You can search and find them pretty inexpensive or just hit up the vendor you get your other stuff from. Whoever you buy the stuff from, I think you'll be impressed.

 

I still don't know why everyone says....."You gotta have a chip for a pulley"

A chip will lean out your program more than any other pulley out there........even a 6#'er

--Joe

 

I respect your posts, especially when you correct one of mine .

I dynoed my L back in Feb. Ran two different chips and a 5 lber. Now I know the 'tail pipe sensor' method is not the best and may not be accurate as to A/F ratios but it's all I can do now. On the dyno, it showed both chips to have been tuned to be "pig-rich"(IMHO) with a 11.2-11.3 ratio??? Maybe I'm missing something..................

Dan

 

I agree with Joe that we are fine with any size pulley on our trucks without a chip on stock computer.I have monitored my airfuel many times with all size of pullies 2,4,6 and upper and without a chip the highest reading i ever saw was a 11.9 on the airfuel with the 6# pulley on which is in a safe area,also are timing is considerably lower also on stock computer.I know of other members that have tested this also and with big pulley they were at 11.8 on the airfuel with no chip and with the chip installed it rose to 13.0 that was programmed for a big pulley People are wasting tuners time on reburns that are not neccessary sometimes,get your airfuel and see where it is before you assume it needs a reburn.

Matt

 

Sorry Dan not trying to ruffle any feathers just posting my opinion if I dissagree with something

As for your A/F.......I am in awe. I am not sure why you got such a high ratio. I ran my 4# with all other mods in my sig (except chip) for a while with no problems at all. I am going to get dynoed this weekend, then I will have some definate numbers to talk to you about

Only thing I can think of is that you have a lot of timing in your program and it was compensated for with a lot of fuel. Either way you are definately running a very conservative program.

--Joe

 

I had access to a Wide Band last week so I pulled my chip and ran my truck with just the 6# pulley on it. The A/F was a 14.8/1 Thats getting pretty lean in my eyes. This was done with a real Wide Band with the sensor screwed into the exhaust where the factory snesors normally are. We ran the truck on the road not in a hot building with little air current. Just sharing the info not trying to tell anyone how to do anything.
By the teblmm if you want a 3# pulley and a diablo chip for a 2001 L I have them both, I'll make you a good deal. email me if your interested. With this combo and a shift kit I ran a 12.6 thru the 1/4 with no other mod's.

 

Not saying your numbers are wrong at all but I am just curious if you cleared your PCM after pulling the chip.

--Joe

 

Everything was cleared, Chris Johnson of JMS was actually doing the testing for me. After getting the base line we programed a 4 way chip to run pump gas and a few race programs to try out next time I go to the track. He has done many L programs and he said the 4 pound and lower pulleys are usually still a little rich but the 6 has enough boost to make it run lean and it may also depend on where you live and what type intake set up you have. Where I live the Alt. is about 12'.

 

FYI guys, at WOT the a/f seems to be dead nuts same either at a bung in the headers or in the tailpipe. The exhaust is moving so dang fast that the cats don't really have any opportunity to exert any influence. I saw it with my own eyes at a local shop, they were curious as to the difference pre and post catalytic converter.

A tuner told me that 13.0-13.1:1 is about perfect for a Lightning. I would be very leery about running anything much leaner, and 11s seems piggy rich. 14.xx sounds like a recipe for disaster.

 

If a certain tuner told you that 13.0-13.1 airfuel is about perfect that is down right scary that is entirely way to lean for our motors especially with the added timing they put in from the chips! If you want a safe but aggressive program i would request to your tuner to set your airfuel from 11.6-12.0 which is not a bad idea for guys running alot of boost on a stock bottom end!This is why it is so important for everyone to have there truck airfuel checked out because every truck is a little different and your tuner can adjust it to where your comfortable with.

Matt

 

I agree with you SMJayman the 14 is way too high, that was without a chip at all. We tuned the chip for a 12.1 and hopfully that left a litttle fat for a less humid day.