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post #1 of 22 Old 01-23-2008, 04:17 AM Thread Starter
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tuning

where's the best tuning shop that knows how to tune with a tweecer r/t near north carolina or in noth carolina? thanks

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post #2 of 22 Old 01-23-2008, 09:50 AM
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Tuning Tweecer aint that bad. I am familiar with the A9L tune, I could build you a tune and send you the bin file in 10 mins. Or I could tell you the things your would need to change in the software. Either way you shouldnt need a tuner. Just get the R/T and a wideband unit and youll be G2G.


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post #3 of 22 Old 01-23-2008, 01:01 PM Thread Starter
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Tuning Tweecer aint that bad. I am familiar with the A9L tune, I could build you a tune and send you the bin file in 10 mins. Or I could tell you the things your would need to change in the software. Either way you shouldnt need a tuner. Just get the R/T and a wideband unit and youll be G2G.
give me some pointers i have 331 turbo w/t66 and 5speed trans so where would i start i'm using a9l computer
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post #4 of 22 Old 01-23-2008, 02:08 PM
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I have a 347 w/ T66, 5 spd trans, and a A9L so Im sure theyll be similiar. Im at work right now and will be able to look at my laptop when i get home. first off tell me what MAF your running and injectors your using. I can build 90% of the tune from that.

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post #5 of 22 Old 01-23-2008, 11:37 PM Thread Starter
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I have a 347 w/ T66, 5 spd trans, and a A9L so Im sure theyll be similiar. Im at work right now and will be able to look at my laptop when i get home. first off tell me what MAF your running and injectors your using. I can build 90% of the tune from that.
blow thru and 60lbs
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post #6 of 22 Old 01-24-2008, 02:44 PM
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Do you have a flowsheet that came with the MAF? You should have got one with the MAF. What type/brand is it? You need to either have a standardized meter such as a Pro-M that is less than a year old / SCT meter or have the flowsheet to properly tune with a Tweecer. It is very important to get the transfer function dialed in within 1-2% since it is your main determination in shooting from the proper A/F in open loop.

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post #7 of 22 Old 01-25-2008, 12:44 AM Thread Starter
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i have a 42 blow thru meter and using the flow chart w/tweecer
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post #8 of 22 Old 01-25-2008, 08:57 AM
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Those Tweecer MAF curves are general and might be off as much as 10% from your actual meter. Your MAF should have come with a flowsheet, without one your guessing that the function stored in the Tweecer is similar. As someone who has tried to use a generic function and failed, do yourself a favor and pay the $40 and have pro-m bench test it and provide you with a 9 point or 30 point flowsheet. Since you have no wideband to verify the results of the tune, this would be the4 safeest way to ensure you are not going leaner then you should.

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post #9 of 22 Old 01-25-2008, 11:40 AM Thread Starter
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i have a wideband just need some pointers on what to change
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post #10 of 22 Old 01-28-2008, 10:49 AM
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1. The cranking PW table: Multiple all values by 0.32 (19#/60#) this is a correction factor since your computer will need to pull a ton of fuel at startup due to the bigger injectors.

2. Put in the transfer function for the 42# flowsheet since you are using a MAF calibrated for 42#

3. Injector slopes - In scalars set your low injector slope to 66 and your high injector slope to 60.

4. change your CID to 331

5. Change your stablized Open Loop table in the high load portions (the top line) to 11.5 or whatever you want your AF to be under high load.

6. If you dont have anyway to pull timing out of the car you can set the WOT timing scalar to -6 or -8 until you get better at tuning.

7. In scalars set Thermactor Present Switch - 0(Disabled) (turns off your emssions pump which you have surely removed by now)

8. In scalars set EGR System Type - 2(No EGR) (tells your computer to ignore anything to do with the EGR, if its not removed you can now and put a blockoff plate without any CEL.

I would start with making these changes and see how well the car runs. I will try and find more changes to make to your tune when i go home today. Please dont do any wide open stuff yet till you get a better idea of how to setup the timing tables. For more specific answers go troll on http://eectuning.org/forums/ and you can find answers to everything for tweecer.


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post #11 of 22 Old 01-29-2008, 07:53 PM
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9. In scalars Time at High Load to force OL = 0 secs (gets you into OL sooner)

10. in scalars WOT TPS breakpoint voltage = 2.09 volts (gets your WOT recognized earlier in your MAF range.

11. MAF voltage maximum = 4.99 volts (gives your more room in your MAF)

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post #12 of 22 Old 02-01-2008, 01:18 AM Thread Starter
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working on this but i got another question my car when i crank it up the volt meter goes down and when i turn lights on or a/c it goes down. i have a new battery and 140 amp alternator what do i need to do to keep this volts correct this causes the car to not idle at all.
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post #13 of 22 Old 02-01-2008, 01:24 AM Thread Starter
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also i dont have a flow sheet for mass air meter, i can send this meter back to pro-m to be recalbrated then i will have a flow sheet
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post #14 of 22 Old 02-01-2008, 09:25 AM
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working on this but i got another question my car when i crank it up the volt meter goes down and when i turn lights on or a/c it goes down. i have a new battery and 140 amp alternator what do i need to do to keep this volts correct this causes the car to not idle at all.

There should be an idle RPM scalar, actually theres two of em, like idle in gear and idle in neutral. Raise both of those to like 850 and see if that clears any of those problems associated with the alt not spinning fast enough.

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post #15 of 22 Old 02-01-2008, 09:33 AM
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also i dont have a flow sheet for mass air meter, i can send this meter back to pro-m to be recalbrated then i will have a flow sheet
how old is the meter? the ones they have produced within the last year or so are all standardized which mean they are a true ratio'd meter from the stock transfer function, and all you'll need to do is go along each point of the transfer function and multiply each point by (60/19) 3.157. If its an old meter you really need to have it flowed or sell it and buy a new meter that has a flow or is standardized. The problem is old meters try to manipulate the transfer function to get proper AF ratio. The SC curved meter knows that your stock high load open loop is like 12.5-13.0 AF so it builds in an extra rich function into the meter to trick your computer to actually giving a final output of 11.5 AF. Another thing I thought about is are those injectors low impedence, because if they are im not sure how you figure that into the tune.
I have personally never used above 42# injectors. You might be able to call pro-m and give them the serial numbers on your meter and give you some info on that meter.

1995 Mustang GT - 347 - PT7576
2004 Mazda RX8 - 13B-REW BWS362
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post #16 of 22 Old 02-02-2008, 01:19 AM Thread Starter
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the 60lbs are high imp but i got a set of 42's was unsure if they will work with my setup. as in power that this car should make, just wanted to have no fuel issues.
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post #17 of 22 Old 02-03-2008, 07:28 PM
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You can use 60# injectors with a 42 calibrated MAF, you just have to make sure your not going above about 4.7 volts on the meter because your computer will not read any additional flow and you will go lean.

1995 Mustang GT - 347 - PT7576
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post #18 of 22 Old 02-07-2008, 01:12 AM Thread Starter
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hey its finally gone the info u gave was great but i was using this on a stock 302 with 165 heads and cobra intake, i got dss motor on stand and getting all parts ready to exchande motors, so when i get this 331 in i will be contacting u on tweecer help u r da man when it comes to this. hope ican count on u for help?
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post #19 of 22 Old 02-07-2008, 01:13 AM Thread Starter
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the info u gave i just changed a few things. what kind of times r u getting with your car?
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post #20 of 22 Old 02-07-2008, 09:38 AM
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yeah no problem. I haven't been able to run my car yet with the turbo. I need a electronic boost controller to maximize my turbo performance. Boost is dropping off in the high RPMs due to the waste gate signal line being attached to the compressor of the turbo. I also get no traction when the turbo spool so im gonna have to program in some negative gain on the EBC so it spools slower but has a higher boost in the high RPMs. I'm hoping for high 11's @122-124 on street tires.

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2004 Mazda RX8 - 13B-REW BWS362
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post #21 of 22 Old 02-07-2008, 10:10 AM Thread Starter
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thats nice hope to get mine da same, just keeping it street but if any ??? talking i will have to represent. but thanks for the help in the future.
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post #22 of 22 Old 05-13-2008, 09:27 PM
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Nice, maybe ill go with a tweecer now... lol

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