Mr GRADY.........and all (Tweecer)

[Darek78]

Ok i just got my 24lb injector's installed and i got a C&L 73mm and i put in a calibrated tube orange color ( using a stock maf sensor)
My Q is do i have to change injector slopes on my Tweecer R/T or i can leave it on the 19lb one's????? or it would be better to change them
does the computer think that i'm running 19lb instad of 24lb??????
plus what maf volts should be for the 24lb do i have to change them to??????

Thank's
Derek.N

 

[CManT1914]

Go into the maf transfer function, and open a new maf file, load the 73mm C&L 24 file. Then enter 24 as your injectors slopes. If your computer knows what BOTH pieces actually are, it's gonna run a lot smoother.

 

[Darek78]

but if i use that maf transfer for the 24lb inj i still have to change the slopes in the scalar section in the tweecer???????


Derek.N

 

[CManT1914]

Yes, enter both your new maf transfer, AND your injector slopes, that way the computer knows exactly what hardware is in there, and isn't being "tricked". FWIW, you can run the J4J1 (Cobra) tune since it's already set up for 24lb injectors, all you'd have to do is enter your new maf slope.

 

[Methodical]

FYI. The J4J1 slopes (stock) are both set at 24.8397. I used the ProM24 MAF transfer and adjusted the MAF to the stock slopes. I experimented with changing the stock slopes with not much success. Rememer, when tuning the MAF curve do not change both the slopes and MAF curve at the same time - do one or the other. I'd suggest that you either put the slopes at 24 or stock J4J1 setting and just adjust the MAF curve to the slopes. This has worked for me but as you know things can be different for others. My car does not surge, pulls strong and as I drove the car more and more it no longer stalls. I guest adaptive has gotten used to my MAF curve and other settings. I am know tuning for more power. Good luck and Have fun. I'm sure you are aware of the EECtuning.org website. If not check them out. Peace

 

[Darek78]

Ok thank's guy's i will try doing that see how it will work on my car plus i know that there is that setting for C&L 73mm but if i remember correct it said for green tube
will it make any diffrence???????????

Thanks
Derek.N

 

[CManT1914]

What setting for a C&L? You need to put in the injector slopes (24, could just start with a Cobra (J4J1) tune to be close already) and then enter the C&L maf transfer file in the functions tab. Don't worry about the sample tube in the maf, you don't need to mess with it. All your tuning will be done via the twEECer now.

 

[blksn955.o]

In all honesty you will prob. be just as happy with the stock MAF...its a 70mm unit and the transfer will work with either the j4j1 or the t4m0 with far, far less hassle than messing with the 3mm larger MAF that will have to be totaly started from scratch as far as the transfer goes most likely.

 

[final5-0]

Derek

I've had no experience with the C&L mafs.

Chris, Greg, and Al all do have good points.

Your Q about which sample tube is intriguing but I don't know the correct answer.

You can find lots of info to help you with your C&L at http://eectuning.org/forums/

Happy Self Tuning

Grady

 

[Darek78]

Ohhhhhh well i tryed to put injector slope's for 24 lb on the tweecer and when i starded the car it ran like crap i could floor it and would not go any were it mad some poping noise and bug down very bad
so after that i added maf calibration for cobra and still no luck
y is this thing happening like that i'm trying to let the eec know what's there and its giving me crap HELP !!!!
then i made a new setting hawink a 19lb injector slope's on 24lb and i load the cobra 24lb maf setting and i advance the timing in global to 4 so i got 14 deg and it runs pretty good but sometimes when i drive the car for 30 minut drive then shut it off and iget back in to it for a drive back it runs like crap again for 3 minut's and then start's to run normal again what the hell and when i put stock setting on then the car is not driveable at all
i need some one to help me with a tune of my car

thanks
Derek.N

 

[Darek78]

it's a 95 GT 5 speed with ,BBK shorty's, Mac X pipe,flowmaster cat back,Steeda #19 cam ,1.6 roller rockers, adj fuel pressure reg,BBK 190lb fuel pump,cobra intake, 70mm T-body, bbk cold air intake,24lb injector's, C&l 73mm with a calibrated orange tube for the injectors and a good tune up and
Tweecer that i can't figure it out

Derek.N

 

[CManT1914]

You need to put the correct maf transfer in. I was looking through the maf transfer files that came with CalEdit, and I couldn't find a C&L 73mm orange tube, so you might have to search the internet for one.

http://tweecer.oplnk.net/
http://autos.groups.yahoo.com/group/tweecer/

Try those websites. They are both set up for twEECer users, and have a ton of good information.

Or you could try putting your stock maf back in, and load the stock maf transfer with 24 injector slopes and see what happens then. If it still runs like crap, it's probably something else.

 

[blksn955.o]

I would say to put your stock MAF in until you get things were you want them...then deal with getting the C&L to work properly after you have some more seat time with the tweecer....

FWIW- I was in the exact same boat...I had a 73mmC&L and a stock MAF and 24#inj. I asked a sim question on the tweecer forums and everyone said to just put the stock MAF on until your ready (your ability) to tweec for the C&L...


I ended up selling the C&L...the Stock MAF has very very good drivability, I will prob. end up getting a 90mm LMAF now anyway after seeing how the factory MAF curves work/ease of tune with them. After I finish shaking down/sorting out some issues.

 

[final5-0]

I would say to put your stock MAF in until you get things were you want them...then deal with getting the C&L to work properly after you have some more seat time with the tweecer....

FWIW- I was in the exact same boat...I had a 73mmC&L and a stock MAF and 24#inj. I asked a sim question on the tweecer forums and everyone said to just put the stock MAF on until your ready (your ability) to tweec for the C&L...


I ended up selling the C&L...the Stock MAF has very very good drivability, I will prob. end up getting a 90mm LMAF now anyway after seeing how the factory MAF curves work/ease of tune with them. After I finish shaking down/sorting out some issues.

Listen to Greg

I remember all the stuff he went through with his C&L.

Over the years, I've seen quite a few peeps go through similar issues with the C&L.

The C&L is not a monster or demon that can't be made to behave but here is the thing about using the C&L or any other part that is not from the main stream of parts most peeps use.

You get no or hardly any benefit from the main stream of peeps knowledge or experience cause they are not familiar with what your trying to accomplish cause they did not use the part you are using.

As for mafs and our 94-95 cars ......................

The maf is one of those parts that you don't wanna scrimp on cause the load the pcm sees is derived from the air flow through the maf.

Accuracy in this instance is CRITICAL!

You need a transfer curve that is accurate for a stable C L tune period!

Here are the known facts about mafs in general and these facts are all over this site and all the other sites as well:

Most accurate and trouble free maf is oem
Next ProM
Next C&L

Some peeps use the C&L with no probs of any kind and that also is a fact.

If you go to the tuner sites you will find more peeps who have used the C&L with sucess but you are gonna have to do the research to find those facts.

One last thing Derek

I wanted to give you some more specific info but you post with no sig giving the details about your combo.

If you would go to your profile page and envoke the ...... auto sig include with post thingy ...... it would help all members to be able to help you more in the future.

Grady

 

[Darek78]

so i should take off the C&L maf of put on the stock one and load the cobra 24lb maf transfer or should just leave the stock maf transfer and try changing the injector slope's ???

Thanks
Derek.N

 

[final5-0]

I have no way I can correctly answer a Q like that cause the first thing I would wanna know is ........

how much air flow are you now making?

Grady

 

[CManT1914]

Remember, GT and Cobra maf's are the same. Here's my suggestion. Since you have 24lb injectors, and the cobra came with 24's, put the stock maf back on, and load the Cobra (J4J1) tune. That will have the right maf transfer, and the right injector slopes. I see you have a Steeda #19 cam with a Cobra intake, but no heads right?

 

[blksn955.o]

I have done it a few ways...but I am sorting out a few issues (valvetrain is my #1 suspect at this time)

I have had this

1. J4J1 base with the T4M0 MAF transfer, stock J4J1 slopes (same for high and low), stock j4j1 breakpoint, stock j4j1 inj. offsets.

2. j4j1 base with everything the same as the j4j1.

3. J4J1 base with the t4m0 MAF transfer, t4m0 breakpoint and diff. high/low slopes, j4j1 inj. offsets. ---current setup from trac testing on #4 findings

4. got P!$$ed at the track and just changed the slopes in the t4m0 base to run the 24#inj. with the t4m0 breakpoint and picked up 2mph with 8 or so less * in timing

all had fairly good drivability around town, The t4m0 base file setup I ran I quickly went back to the j4j1...for some reason it got funky after adaptive got back to adj. things...I just never had this issue with the j4j1 base so I never looked back from what peeps on the forums have said about this topic. But the car runs better, drivability wise, with the t4m0 MAF transfer than with the j4j1.

Perf. wise like I said I am sorting out some issues, mostly the valvetrain...I realy think I am floating the valves due to too long of a pushrod...heads are shaved .065 and my blocks deck was also milled (DSS shortblock).

 

[final5-0]

Remember, GT and Cobra maf's are the same. Here's my suggestion. Since you have 24lb injectors, and the cobra came with 24's, put the stock maf back on, and load the Cobra (J4J1) tune. That will have the right maf transfer, and the right injector slopes. I see you have a Steeda #19 cam with a Cobra intake, but no heads right?

OK Chris

Your gonna have to clue me in buddy as I am not afraid to say it.

I'm not the sharpest tool in the shed at times.

Where are you getting all this info about Derek's combo?

Grady

 

[CManT1914]

OK Chris

Your gonna have to clue me in buddy as I am not afraid to say it.

I'm not the sharpest tool in the shed at times.

Where are you getting all this info about Derek's combo?

Grady

Post #11! I missed it a few times myself.

it's a 95 GT 5 speed with ,BBK shorty's, Mac X pipe,flowmaster cat back,Steeda #19 cam ,1.6 roller rockers, adj fuel pressure reg,BBK 190lb fuel pump,cobra intake, 70mm T-body, bbk cold air intake,24lb injector's, C&l 73mm with a calibrated orange tube for the injectors and a good tune up and
Tweecer that i can't figure it out

Derek.N