FREE MPI help!

[Crazee D]

Crazee D -- how's the progress after you got accurate instructions from Nick?

I returned my unit with 1 brown and 1 white wire and got one from nick with 2 brown wires and new instructions that say 'long and short brown' where it used to be white.

Re-installed NA module and tried to find good places to mount the MPI and NA units and still be able to properly return the ECU to its home.

I hooked up laptop 1st time and could not get comm ports set up.
When I tried later I just needed to change the advanced settings on the USB to Serial adapter driver to look at port 1 or 2 since it said 3 and 4 were in use. Selected port 1 and then opened MPI tuner and set it to port 1 also.

Bada bing...live data!
Which I hope means we hooked everything up right.

Yesterday I noticed a sound that I assume was misfiring. Like pop, pop pop from the engine. I can really feel it too now with the motor mounts in!

I did 7 datalogs, mostly at idle and a few driving around and sent them off to Nick. He sent me a new fuel map to load. Now I gotta mess with that.

1st attempt to load map failed, I think file was renamed with wrong extension (.smt.txt) need to modify and re-attempt

 

[Bigg Tim]

If renaming that file didn't work, have him send you a .zip file with it in it, I know aol screws with attachments sometimes.

 

[MSP608]

i just recently picked up a used mpi tuner and i plan to have it installed/tuned by kooldino. how hard would it be for me to learn to tune it myself so down the road when i make further modifications i could compensate for them? i have done all my own mods but never messed with fuel/timing. i skimmed thru my friends 'maximum boost' by corky bell and was familiar with most of what i was reading. any books you guys recommend for tuning? please dont treat me as a noob, i really want to learn this stuff. a mature helpful response would be awesome.

 

[terbow]

in a nutshell, the initial tune is the hardest part. Since dino is doing it youll have a good tune and alls you have to do is basically add numbers or subtract them based on your fuel requirements. Its not hard, you just see where your lean or rich (theres a box that follows the rpm and throttle position), and change the numbers accordingly. I would get a wideband if your going to tune it yourself. Timing is a little trickier but its the same idea (you have to be more careful with timing though)

 

[MSP608]

in a nutshell, the initial tune is the hardest part. Since dino is doing it youll have a good tune and alls you have to do is basically add numbers or subtract them based on your fuel requirements. Its not hard, you just see where your lean or rich (theres a box that follows the rpm and throttle position), and change the numbers accordingly. I would get a wideband if your going to tune it yourself. Timing is a little trickier but its the same idea (you have to be more careful with timing though)

k thanks alot for the response, doesnt sound too bad. i have all the supporting mods so i figure a tune of 10-11 psi high boost isnt too bad at this point. but as soon as i can save up i plan on getting new rods/pistons and of course will want more boost. would tuning for say 15 psi be almost like initial tuning all over again? or would i be able to reconfigure my previous high boost map?

i figured out a long time ago what i wanted with this car so fancy light show wouldnt cut it for me. ive got the aem wideband and it works great...cept i need a new sensor right now. ill definitely have a new one before i go to get the mpi installed/tuned. thanks again for the advice.

 

[terbow]

well if ur just upping the boost, and not changing the whole setup then u can just up it a psi or 2 at a time and see where you need fuel. if u change alot of the setup then the areas of fuel / timing will change.

k thanks alot for the response, doesnt sound too bad. i have all the supporting mods so i figure a tune of 10-11 psi high boost isnt too bad at this point. but as soon as i can save up i plan on getting new rods/pistons and of course will want more boost. would tuning for say 15 psi be almost like initial tuning all over again? or would i be able to reconfigure my previous high boost map?

i figured out a long time ago what i wanted with this car so fancy light show wouldnt cut it for me. ive got the aem wideband and it works great...cept i need a new sensor right now. ill definitely have a new one before i go to get the mpi installed/tuned. thanks again for the advice.

 

[MSP608]

k...another thing. im sure my stock injectors will run out of steam past 10-11 so what should i go with: 440's or an extra 750cc injector? ohyea after forged internals i plan on going with a gt28rs. but this is lookin like quite far down the road, so whats my best option for injection?

 

[terbow]

that depends if dino allows u to use the turbo moduole. most likely hes gonna make u use extra injectors, so you have your answer there. besides the mpi is best used with extra injectors rather than larger primaries. if u go standalone then go for larger primaries.

 

[MSP608]

allow me?...yea he mentioned the one extra injector, i just wanted to figure out my different options.

 

[terbow]

Yea hes not a fan of the TM so i dont know if he even installs it with them. youd have to ask him, extra injectors are the way to go anyhow since ur gonna be goin big later.

 

[bazooka joe]

in a nutshell, the initial tune is the hardest part. Since dino is doing it youll have a good tune and alls you have to do is basically add numbers or subtract them based on your fuel requirements. Its not hard, you just see where your lean or rich (theres a box that follows the rpm and throttle position), and change the numbers accordingly. I would get a wideband if your going to tune it yourself. Timing is a little trickier but its the same idea (you have to be more careful with timing though)

haha tony, some of us don't see the world like you do!! hey, more more crack at the mpi before you leave town??? let me know if you can...thanks!! i'll by you a going away dinner??

 

[Bigg Tim]

Actually on the MSP's it's real easy to tune it via O2 tuning and you don't have to spend money on anything else. But Dana won't do that. If you actually are going bigger later, go with 2 xtra injectors. Then later when you go big, you will need to have it tuned with the stock injectors as well if you start to run out of fuel.

 

[bazooka joe]

Actually on the MSP's it's real easy to tune it via O2 tuning and you don't have to spend money on anything else. But Dana won't do that. If you actually are going bigger later, go with 2 xtra injectors. Then later when you go big, you will need to have it tuned with the stock injectors as well if you start to run out of fuel.

this is my last try, if i can't get enough fuel i'm going with the extra injector setup (like bigg tim suggested)

 

[Bigg Tim]

this is my last try, if i can't get enough fuel i'm going with the extra injector setup (like bigg tim suggested)

Stock injectors plus xtra's is the way to go man. If you continue to use the stockers, then 1 xtra injector should be fine with the auto you have.

 

[bazooka joe]

Stock injectors plus xtra's is the way to go man. If you continue to use the stockers, then 1 xtra injector should be fine with the auto you have.

just like you told me last year!!

 

[Bigg Tim]

just like you told me last year!!

So how lean are you running without them?

 

[bazooka joe]

So how lean are you running without them?

it's weird becasue in second gear i can go all out and run 11.5 at 5psi..in 3rd gear all out it goes to 12.5-13ish...

 

[Bigg Tim]

it's weird becasue in second gear i can go all out and run 11.5 at 5psi..in 3rd gear all out it goes to 12.5-13ish...

Damn auto's

 

[bazooka joe]

Damn auto's

i agree, but it is fun just the same...with the extra injector my prob should be resolved...i think the problem is load based?

 

[GMalatrasi]

Damn auto's

Not saying autos dont have a BIG disadvantage but I dont understand how it would cause the a/f ratio to change like that from one gear to the next...?