04-02-2007, 08:48 AM | #1 |
Member
Join Date: Aug 2005
Posts: 53
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94 GT Vs Cobra tunes
Hi wise ones!
I'm comparing the tunes and what I see is the MAF is almost the same. The injectors are different, 19 vs 24 . The big difference is the injector offset vs voltage. It seems to me, this is how Ford matched the 24# injectors to the standard MAF used for both cars. I have seen published offset tables, for the 24# injectors and they were from the Cobra which are not typical due to the MAF not being calibrated for the injector size. I don't see any big differences in the tune A/F tables except the Cobra tune is a little fatter and the GT tune has a little more timing. The Cobra tune uses the same number for high/low injector slope. I'm thinking I will start with the GT tune and build from there. I don't see any advantages to using the Cobra tune. I run a C&L, 73 MM with Orange tube, 24#. I'm thinking I will just ratio up the flow numbers for the stock MAF curve, new value = old *24/19 for a starting point. I see someone has posted a ProM flowed 73 MM 24# C&L but they didn't identify the cal tube that was used. C&L doesn't use the same tube for every 24# application. Comments? Thank, Eric
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TT331FB - T3/.6/.63 turbos, Spearco intercooler, 302/331 Mexican Block,AFR 185 heads, 80mm MAF, 75mm TB, 50# injectors, Tweecer, Track Heat intake, Comp cams roller blower grind, MSD BTM, DIY-WB, Yokogawa video display,T-56 tranny, 9" 3.5:1 Traclock, 4x disk brakes, TCP most everything, shelby roll bar. First fire up 2/14/2004. |
04-02-2007, 06:05 PM | #2 |
3v's are slow
Join Date: Dec 2004
Location: Here and There
Posts: 17,152
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Interesting about the OEM MAF tables.
I figure timing would be the biggest difference between the 2 processors along with a possible speed limiter |
04-08-2007, 12:08 AM | #3 |
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Join Date: Mar 2005
Location: Sacramento California
Posts: 449
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The timing tables and fuel tables may look close but make sure to look at the multipliers for each table. I believe they are different.
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EEC Analyzer A9M, TwEECer, 306ci, 73mm C&L w Tuner Tube, Cobra Intake, 42# inj, Edelbrock 6037, E303 cam, 155 fuel pump, FPR, 70mm TB, E-Fan, 3.55 gears, Powerdyne 9psi actual 5psi...way more. |
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