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New muffler is in and the exhaust is still loud as hell, but much better than before. Spintech added steel wool sound deadening on the inside and a merge plate so the exhaust doesn't flow straight through like before. Very happy with the result.
Still having tune issues where the rpm's hang at about 2,500 when coming to a stop. Once I start going it levels out, but definitely need to resolve this. Hit up DJwade as his setup is very similar to mine and he is going to look over his tune and see if there is anything different that stands out. Need to get an alignment soon and then the car is ready for the track.
Got my son's power wheels dune racer extreme in for christmas and couldn't resist putting it in the garage next to the exo. Walmart has these on sale for $200 and I was pretty happy with it for that price. Already looking at modifying it with the milwaukee 18v batteries.
Still having an issue with the car hanging at a higher rpm when I am coming to a stop and then continues when stopped. Wouldn't be too bad, but it is at 2,500 rpm's. At this point I believe the lack of a clutch switch sensor is causing it.
I remember asking V8R about a clutch switch when I started the build, and I think I remember Shandelle saying some of the lfx swaps they have done had this issue. Can't remember if he had a solution for it, but I'll reach out this week. Griff had mentioned he had the same issue and had to start from scratch on his tune to get rid of it.
In the mean time, I ordered an oem camaro clutch switch since they are only $9 (GM #20995840).
My LFX Miata has a similar issue except for me it's when I am entering the hot pits and it hangs at like 2k-2.5k rpm. I end up using first gear and braking to bring it down. I was thinking it had more to do with a vacuum leak through the pcv system or something so I was going to modify my catch can system and VTA through a can instead of returning it to the intake manifold to see if that cures it.
Not really seeing how lack of a clutch switch would cause it to hang high in the rpm range. I can open up the tune in HPtuners and see if there are any settings related to that.
I have a similar issue on my lfx car as well. Usually when the car is warm and I’m coming to a red light. It hangs for a second so I usually just engage the clutch and brake to a stop while the engine settles. It seems to be pretty random. I haven’t found a way to make it happen. My car was the lfx demo car for V8R so I’m assuming they haven’t found a fix for it yet.
For me it happens every single time I come off the track and head into the pits. My guess is it's related to spirited/race driving and then coming back into the pits/red light on the street. Could be excess crank case pressure bleeding through the pcv system? Our V8 car does it as well when coming off the track. Hangs at 2-2.5k before taking 15 seconds or so to come back down.
Interesting, you both are describing the issue exactly. It tends to settle down, but for me it takes about 10 seconds. Brakes, putting the car in or out of gear and revving have no effect on it for me. Still does it regardless.
My thought was that if the oem camaro has a clutch switch and it goes to the ecu, it must be doing something when the clutch is depressed. Not sure what, but figured it was worth a test.
DFCO is the phrase you're looking for - deceleration fuel cut off (in megasquirt, fuel overrun). I thought about installing the clutch switch to see if it helps, but never got around to it. Looking through some DFCO threads on the forum makes it seems like it's almost black magic to get the thing to idle down without acting like a hung dashpot.
Great looking piece of hardware! It would be nice to see someone with the original shifter in an actual miata chassis try one to see if it fixes the 2nd / 3rd gear issues. Can't wait to see some video of it in action!
Mine is arriving Friday so I will get it installed in the the next week or so.
I hope yours works! Mine did not work in my unmodified NA6 unfortunately. It would not fully engage 3rd or 6th and reverse was a complete no-go.
What didn't work about it? were there interference issues that we causing it to short stroke? i was excited about this since the feel of the modified OEM one is crap, but now I am 2nd guessing my decision.....
Mine works perfectly, but obviously in an exocet and not a miata. I've had a few people comment now that it is the best feeling shifter they have ever touched.
Mine works perfectly, but obviously in an exocet and not a miata. I've had a few people comment now that it is the best feeling shifter they have ever touched.
Yea I REALLY wanted like hell for it to work because the shifter really is almost like a piece of artwork. I'm sure I could get it to work with some modification, but I was holding off on that until I have the time.
Thanks Griff! Car still needs an alignment, but it drove really well. Was a little sketched out with cold tires and didn't get on it too much. The 3.91 gears actually do very well, even on the highway because of 6th gear. And the tires spin in 1st through 3rd if you want, but the roll-ons in this car are just insane. Very driveable all considering. Can't even imagine what yours is like with the turbo. We need to get to the track!
And not to rub it in, but that shifter is friggin amazing! I'd be curious to see why it works so well in the exo and the miata guys are having issues.
Small update but a big deal. So Griff managed to figure out the idle hanging issue so many of us are dealing with. The car is now running like a dream!
Pretty simple but fixed it immediately.
HP Tuners->Engine->Idle->RPM->Adaptive Idle->Max VSS-> change from 4.3 to 300 (mph)
Great job finding this Griff. Thanks as always Brother!
12-23-2019, 10:33 AM
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