maf transfer question for dale/qwksnake

sinistercoupe · 12-22-2005, 09:26 AM

since you guys seem pretty knowledgable on the tweecer i'll ask you guys this. I don't have a flowsheet for my current meter (pro-m 75mm bullet blowthru caled for 50s). I looked in the caledit files and they have a pro-m50 TF in there (i assume for drawthru though) but it looks real weird. It only goes to 1.5 volts. All the other functions even for the 60 and 62 pro-m go to 5 volts.

just curious if there was a real big difference in the TF for blowthru compared to drawthru for the same style meter? I have my old flowsheet for my blowthru 42# bullet and it looks very similar to the numbers in the pro-m42 TF and Incon 42 files.

Also i think i raced Qwksnake years ago at FFW in montgomery true street. I had my white lx hatchback at the time. 93 teal cobra with qwksnake on the tag. i think my car was running very low 12s then...like 12.1 ish.

QWKSNKE · 12-22-2005, 09:51 AM

Quote:

Originally Posted by sinistercoupe

since you guys seem pretty knowledgable on the tweecer i'll ask you guys this. I don't have a flowsheet for my current meter (pro-m 75mm bullet blowthru caled for 50s). I looked in the caledit files and they have a pro-m50 TF in there (i assume for drawthru though) but it looks real weird. It only goes to 1.5 volts. All the other functions even for the 60 and 62 pro-m go to 5 volts.

The file is screwed up more than likely. I don't really trust the MAF files that are programmed in the Tweecer. The voltage/flow points should be a good bit different between a draw through meter and a blow through. (blow through meter see a higher velocity of air)

Quote:

Also i think i raced Qwksnake years ago at FFW in montgomery true street. I had my white lx hatchback at the time. 93 teal cobra with qwksnake on the tag. i think my car was running very low 12s then...like 12.1 ish.

That was me and that was probably on 2002. I don't think I had that tag in 2001 when I ran at the Montgomery FFW.

Where are you from?

sinistercoupe · 12-22-2005, 10:29 AM

Quote:

Originally Posted by QWKSNKE

The file is screwed up more than likely. I don't really trust the MAF files that are programmed in the Tweecer. The voltage/flow points should be a good bit different between a draw through meter and a blow through. (blow through meter see a higher velocity of air)

That was me and that was probably on 2002. I don't think I had that tag in 2001 when I ran at the Montgomery FFW.

Where are you from?

i live in atlanta. If i don't have a flowsheet for my meter should i just leave the transfer stock then and try to tune it with the wot fuel multiplier? should i mess with the injector slopes without a new transfer loaded in?

QWKSNKE · 12-22-2005, 10:44 AM

ehh. I don't think I would leave the stock transfer in.

Give us more info on your combo. Also are you running a R/T or a base tweecer

sinistercoupe · 12-22-2005, 11:32 AM

Quote:

Originally Posted by QWKSNKE

ehh. I don't think I would leave the stock transfer in.

Give us more info on your combo. Also are you running a R/T or a base tweecer

i just have a base since i got it for 200 bucks used and i have a plx m300 wb on the car now to monitor a/f ratio.

basic setup is

87 notch 5 speed
351w w ported TFS tw heads,ported edel perf rpm,f303,1.6RR
75mm tb (made 339 rwhp/376tq) n/a

fuel system is 360 lph kinsler external pump,-8 feed,-6 return,aeromotive rails,
a1000 boost referenced regulator,50lb holley injectors

turbo kit is a B&G headers,3 inch downpipe,T-76 turbonetics q-trim dual ball bearing turbo,24x12x3 air to air intercooler,tial 38mm gate,greddy profec b EBC

running the pro-m bullet blowthru calibrated for 50s. This is mounted after the IC outlet.

QWKSNKE · 12-22-2005, 12:33 PM

I would seriously entertain the thought of changing out the Pro-M 75 and go to at least an Pro-m 80 or a univer.

At the very least, send the 75 back for a flow test so that you could get a data sheet.
Getting your tune dialed in without having an R/T is going to be a nightmare with an unknown MAF transfer curve

93Cobra#2771 · 12-22-2005, 12:35 PM

Quote:

Getting your tune dialed in without having an R/T is going to be a nightmare with an unknown MAF transfer curve

Dale McPeters · 12-22-2005, 01:40 PM

Quote:

Originally Posted by QWKSNKE

I would seriously entertain the thought of changing out the Pro-M 75 and go to at least an Pro-m 80 or a univer.

At the very least, send the 75 back for a flow test so that you could get a data sheet.
Getting your tune dialed in without having an R/T is going to be a nightmare with an unknown MAF transfer curve

Or one of the C&L tuner maf's. They seem to work well in blowthru app's on the EEC-IV's.
Lee is correct it will be very time consuming getting the meter dialed in without the ability to datalog. You really need to see what the lambse1, maf voltage etc. is doing base on rpm, AFR etc.. If you have access to a breakout box you can use it and a digital volt meter and eyeball maf voltage.
You at least have to know what the maf voltage is at certain rpm's etc. so that you know where to adjust the maf transfer curve....
You really can not guess at this.

Quote:

Originally Posted by 93Cobra#2771

By the way Richard where are the pictures of those new tires?

93Cobra#2771 · 12-22-2005, 01:53 PM

Planning on driving it to work tomorrow and snapping a few then.

Dale McPeters · 12-22-2005, 01:57 PM

Quote:

Originally Posted by 93Cobra#2771

Planning on driving it to work tomorrow and snapping a few then.

'bout time....

12-22-2005, 09:26 AM	#1
sinistercoupe Junior Member Join Date: Dec 2005 Posts: 23	maf transfer question for dale/qwksnake since you guys seem pretty knowledgable on the tweecer i'll ask you guys this. I don't have a flowsheet for my current meter (pro-m 75mm bullet blowthru caled for 50s). I looked in the caledit files and they have a pro-m50 TF in there (i assume for drawthru though) but it looks real weird. It only goes to 1.5 volts. All the other functions even for the 60 and 62 pro-m go to 5 volts. just curious if there was a real big difference in the TF for blowthru compared to drawthru for the same style meter? I have my old flowsheet for my blowthru 42# bullet and it looks very similar to the numbers in the pro-m42 TF and Incon 42 files. Also i think i raced Qwksnake years ago at FFW in montgomery true street. I had my white lx hatchback at the time. 93 teal cobra with qwksnake on the tag. i think my car was running very low 12s then...like 12.1 ish.

12-22-2005, 10:44 AM	#4
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	Re: maf transfer question for dale/qwksnake ehh. I don't think I would leave the stock transfer in. Give us more info on your combo. Also are you running a R/T or a base tweecer __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

12-22-2005, 12:33 PM	#6
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	Re: maf transfer question for dale/qwksnake I would seriously entertain the thought of changing out the Pro-M 75 and go to at least an Pro-m 80 or a univer. At the very least, send the 75 back for a flow test so that you could get a data sheet. Getting your tune dialed in without having an R/T is going to be a nightmare with an unknown MAF transfer curve __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

12-22-2005, 01:53 PM	#9
93Cobra#2771 The Kocky One Join Date: Dec 2004 Location: Yeah, but those cutters won't bust any walnuts.â„¢ Posts: 1,948	Re: maf transfer question for dale/qwksnake Planning on driving it to work tomorrow and snapping a few then. __________________ *For Sale: Reproduction Window Stickers, 87+ Mustangs, Cobras, Lightnings, and HD F150!* Richard White 93 Cobra Kocky will be back!