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SVTPerformance's Chain of Restaurants
Tuning À la carte
Is Your Car Tuned Correctly?
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<blockquote data-quote="blackshelby" data-source="post: 12512465" data-attributes="member: 83686"><p>QUOTE=itzl0l You do realize (you do right?) that no1 buys a Cobrajet and then goes immediately to the track and expects to be competitive in their class. Many of these cars run full standalone ECU's...Bigstuff...fast...whatever. I know Kurgan has tuned his fair share. </p><p><span style="color: Yellow">You do realize the fastest cobra jet in the country (TASCA Ford ) has gone deep in the seven second zone at 170+ uses the same setup the car was delivered with?</span></p><p><span style="color: Yellow">You also realize if the cobra jets want to run and be legal they must retain the setup the way the car was delivered with (IF running NHRA classes)</span> </p><p></p><p>OEM, mass produced cars like the Shelby's, Roush, Saleens, Focus, Rapors ect (that you named) CERTAINLY do have their mass air curves created on a flow bench (per the OP)...thats how oems do it. (where nearly every combination is identical)</p><p><span style="color: yellow">Doesn’t matter if mass produced or one off setups are used all MAF should be calibrated on a flow bench. That is the only true correct method acceptable to calibrator a MAF.</span></p><p><span style="color: yellow"></span></p><p> <span style="color: yellow"></span>The AFTERMARKET ....changes all that around....you start running one-off combinations of MAF housings/intakes...you change anything that effects flow across the sensor and guess what...your curve is off. There is no feasable way to take my exact intake combination to a flow bench and get exact numbers. So you do what any competant tuner does....you adjust the mass air xfer to correct for these variations. Why would you change the fueling side of things? Those are known/good values? </p><p><span style="color: yellow">Who says there is no feasible way to get a one off setup flowed? That is wrong and simply a false statement trying to justify the other method.</span></p><p><span style="color: yellow"></span></p><p> <span style="color: yellow"></span>Again...this is EXACTLY what the most highly regarded tuners do. </p><p> <span style="color: Yellow">I wouldn’t consider any tuner highly regarded if they are tuning the way you described and neither would the calibrators at Ford think so. </span></p><p><span style="color: Yellow"></span></p><p> <span style="color: Yellow"></span>The OEM calibrators use a known curve for their exact, repeatable situation.....as soon as that changes it is up to us to make the corrections to the curve for our application. Simple. </p><p><span style="color: yellow">So that justifies calibrating a MAF in a non preferred method?</span></p><p> </p><p>Granted, you cant get all willy nilly with the corrections.....I've seen some hacked up maf curves. This is bad. You cant tune around a mechanical issue. But to say that adjusting the MAF xfer is wrong...its well....wrong. end QUOTE</p><p><span style="color: yellow">I would consider every maf transfer function hacked if not flowed.</span></p></blockquote><p></p>
[QUOTE="blackshelby, post: 12512465, member: 83686"] QUOTE=itzl0l You do realize (you do right?) that no1 buys a Cobrajet and then goes immediately to the track and expects to be competitive in their class. Many of these cars run full standalone ECU's...Bigstuff...fast...whatever. I know Kurgan has tuned his fair share. [COLOR="Yellow"]You do realize the fastest cobra jet in the country (TASCA Ford ) has gone deep in the seven second zone at 170+ uses the same setup the car was delivered with? You also realize if the cobra jets want to run and be legal they must retain the setup the way the car was delivered with (IF running NHRA classes)[/COLOR] OEM, mass produced cars like the Shelby's, Roush, Saleens, Focus, Rapors ect (that you named) CERTAINLY do have their mass air curves created on a flow bench (per the OP)...thats how oems do it. (where nearly every combination is identical) [COLOR="yellow"]Doesn’t matter if mass produced or one off setups are used all MAF should be calibrated on a flow bench. That is the only true correct method acceptable to calibrator a MAF. [/COLOR]The AFTERMARKET ....changes all that around....you start running one-off combinations of MAF housings/intakes...you change anything that effects flow across the sensor and guess what...your curve is off. There is no feasable way to take my exact intake combination to a flow bench and get exact numbers. So you do what any competant tuner does....you adjust the mass air xfer to correct for these variations. Why would you change the fueling side of things? Those are known/good values? [COLOR="yellow"]Who says there is no feasible way to get a one off setup flowed? That is wrong and simply a false statement trying to justify the other method. [/COLOR]Again...this is EXACTLY what the most highly regarded tuners do. [COLOR="Yellow"]I wouldn’t consider any tuner highly regarded if they are tuning the way you described and neither would the calibrators at Ford think so. [/COLOR]The OEM calibrators use a known curve for their exact, repeatable situation.....as soon as that changes it is up to us to make the corrections to the curve for our application. Simple. [COLOR="yellow"]So that justifies calibrating a MAF in a non preferred method?[/COLOR] Granted, you cant get all willy nilly with the corrections.....I've seen some hacked up maf curves. This is bad. You cant tune around a mechanical issue. But to say that adjusting the MAF xfer is wrong...its well....wrong. end QUOTE [COLOR="yellow"]I would consider every maf transfer function hacked if not flowed.[/COLOR] [/QUOTE]
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Is Your Car Tuned Correctly?
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