Lund Racing Flex Fuel Tunes now available!!!

I have received my revised flex tune from Lund after getting the go ahead from my 93 base tune logs.

It seems the drivability is better, yes. Noticeably smoother off-on throttle.

I did notice a jerky 1-2 shift at part throttle a couple times, but that may go away as the car adapts. It could idle a bit smoother to my liking but we'll see what Lund says after I get them some more logs.

So far I'm pleased with how it drives compared to my previous flex tune.

lugz said:

Update- the 93-only tune Lund sent me is now all green in the OBDII section. They said there was nothing that could be done to get the Flex Fuel tune to pass inspection. Bummer. Heads up for anyone who is considering the FF tune and has to deal with OBDII inspection.

BTW, Lund also said they could NOT adjust the speedo for shorter tires via the tune, which was a bit of a surprise.

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Can't you just load the stock tune back on for the inspection, and switch back to the flex after you pass?

MX5Racer said:

Can't you just load the stock tune back on for the inspection, and switch back to the flex after you pass?

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I was also wondering why you couldn't do that :shrug:

MX5Racer said:

Can't you just load the stock tune back on for the inspection, and switch back to the flex after you pass?

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JLT intake. Yeah, yeah could swap intake back to stock, retune to stock, drive for a week while the OBDII relearns, then change it all back after inspection, but I'm too old for that bullsh*t. Looks like the Lund 93 tune will pass inspection, so that's what I'm going to do. Not crazy about swapping tunes (since there's a record left in the computer of how many times it's been programmed, at least so I've heard.) May just delete the FF tune and try to get my money back on it. I swear the car runs better on 93.

I just put in more E85, and now the AFR on my car dash screen is reading 9.3-9.6. Is this something I should be concerned about? Does the car read the actual AFR or is it just an inferred value and should be more less ignored? Lund is gonna be be busy for awhile with Mod Nationals so I thought I would ask here to see if anyone knows about this.

My understanding is E85 is 9.8:1 stoich isn't that right?

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Is it worth $200? Do existing customers get any kind of break?

The Flex tune is totally worth the extra $200. The responsiveness and power are obvious with a tank of e85. In colder months I ran straight 93 or a mix equal to E-40 to E-60. Cold weather + pure E85 caused starting issues and some hesitation.

Sighlense said:

Is it worth $200? Do existing customers get any kind of break?

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I don't feel the $200 is a good price, should be $100. However, the gains are better than the $300 some people feel like spending on intake tubing...

DarkestHour said:

I don't feel the $200 is a good price, should be $100. However, the gains are better than the $300 some people feel like spending on intake tubing...

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Yeah, last fall when i put the car away it was +$100. Don't know why the increase. Seems like existing customers should get some kind of discount. Those that were existing when it first came out got it free!

the first time you hafta put 93 back in the car, you will be so glad you paid $200 for the ability to take advantage of the corn

I didn't feel that much of a difference with the flex fuel tune, then when I figured out that it wouldn't pass an OBDII inspection (systems not ready) backed out the tune and have been running 93 tune since. My experience is anecdotal - never did a back to back on the track or dyno, so YMMV.

lugz said:

I didn't feel that much of a difference with the flex fuel tune, then when I figured out that it wouldn't pass an OBDII inspection (systems not ready) backed out the tune and have been running 93 tune since. My experience is anecdotal - never did a back to back on the track or dyno, so YMMV.

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Can just flash back to the 93 tune when taking it in for inspection, no?

Sighlense said:

Can just flash back to the 93 tune when taking it in for inspection, no?

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only takes a couple minutes to flash back to stock:cheers:

Sorry I posted. This was hashed and rehashed above in this thread. It's all good. :cheers: