[gpdriver17]

Originally Posted by JBA87

I think it's more like 8.3 or 8.5 on pump Gas


Could also humidity here in Florida ... it was 80% yesterday

I wish there was a good way to dilute the humidity with a modification

Originally Posted by JBA87

I think it's more like 8.3 or 8.5 on pump Gas


Could also humidity here in Florida ... it was 80% yesterday

I wish there was a good way to dilute the humidity with a modification

I know 2 people with comps that were in the 7s stock, I believe on pump gas. I did an 8.0 with a non comp stock on pump gas, but had a good DA. I don't know how much humidity can hurt. Water injection into the intake usually adds power lol. The heat can hurt though.

[JBA87]

Heading back I got one more 60-130 (this time valid)

Same time essentially 7.90


I feel like this should be mid to low 7s on pump? No?

[JBA87]

75% humidity .. f'in Florida

[JBA87]

About 36 hours after ECU flash .. and less than 24 since calibration =

Slowness

I didn't log

60ft meh
1/4 garbage for 22psi

0-60 pathetic



Trap ok for Florida .. maybe ?

But should be north of 130. No


How many days do you have to wait for these ecus to adapt

[Fuel-It!]

Trap is same as your JB4 only runs.

Did you try my idea of map1 or map2?

[JBA87]

I didn't do a 1/4 mile run with JB4 only

Not yet .. I will

Mo @ DME suggested I wait a little before changing To let adaptation finish

Random fuel question:

How safe is adding:


E30 ;
E85 ; or
Boostane

To 93 pump in our cars ? Any risks? Special considerations ?

Also, what about filling the whole tank with e30 or e85? Just curious what's safe?

[JBA87]

Originally Posted by limeypride

Lunges:convulses... we're on the same page —> it's using something ZF call QS3 shifting as it should during launch so you're good on that front.

I have nothing else to add I'm afraid. Timing and Terry are your path forward I think.

Limey

After turning with DMEs ECU Tune this QS3 shifting feels like it is no longer present .. could be in my head


Where can I read up about this system ?

[gpdriver17]

Originally Posted by JBA87

I didn't do a 1/4 mile run with JB4 only

Not yet .. I will

Mo @ DME suggested I wait a little before changing To let adaptation finish

Random fuel question:

How safe is adding:


E30 ;
E85 ; or
Boostane

To 93 pump in our cars ? Any risks? Special considerations ?

Also, what about filling the whole tank with e30 or e85? Just curious what's safe?

Do NOT do a whole tank of E85. That would be bad. I would start by adding 3-4 gallons of E85, then fill the rest with 93. You can go up to 5 gallons of E85 on a tank, but I wouldn't do any more than that without meth injection. E85 has a lower energy density than gasoline, the fuel injectors have to inject more of it. If you're spraying meth (another source of fuel) then you can increase past E30. Otherwise though, E30 is about the max the stock fuel injectors/map can compensate for. It will take a week to adapt to it at least.

Boostane, I would stay away from. I ran it for a while and had some performance issues after a bottle of it. My spark plugs were coated with MMT (what boostane uses to increase octane). Some octane boosters seem to be safe though.

[limeypride]

Originally Posted by JBA87

Limey

After turning with DMEs ECU Tune this QS3 shifting feels like it is no longer present .. could be in my head


Where can I read up about this system ?

I've never found a thing online which is why I don't bring it up much—sounds like BS without data. All I have is info from my local dealer that I trust (specifically from the shop foreman that has serviced my Ms for over a decade). You'll know, though—if it snaps or pops between shifts in the same way it does without launch control, then it's gone. With LC, and as we've discussed, it quietly and much more powerfully convulses/lunges/surges into the next gear with no apparent loss in forward propulsion.

The snaps/pops are the real giveaway.

I'd guess an M5 is down almost a full 1/3 second—perhaps a bit more—without it even on a 0-60 pull.

[limeypride]

Originally Posted by gpdriver17

Do NOT do a whole tank of E85. That would be bad. I would start by adding 3-4 gallons of E85, then fill the rest with 93. You can go up to 5 gallons of E85 on a tank, but I wouldn't do any more than that without meth injection. E85 has a lower energy density than gasoline, the fuel injectors have to inject more of it. If you're spraying meth (another source of fuel) then you can increase past E30. Otherwise though, E30 is about the max the stock fuel injectors/map can compensate for. It will take a week to adapt to it at least.

Boostane, I would stay away from. I ran it for a while and had some performance issues after a bottle of it. My spark plugs were coated with MMT (what boostane uses to increase octane). Some octane boosters seem to be safe though.

BOOSTane Pro is working for me like a champ so far. Do you recall any early indications of the bad symptoms you mentioned?

PS: can you quantify a 'while' for me, please.

[gpdriver17]

Originally Posted by limeypride

BOOSTane Pro is working for me like a champ so far. Do you recall any early indications of the bad symptoms you mentioned?

PS: can you quantify a 'while' for me, please.

It worked great for me, until it didn't. All of my 1/4 mile, 60-130 times, etc. increased by about a half of a second for several weeks. For example, my Map 0 60-130 was 8.00 when I started using Boostane. After a few weeks of it, it was 8.50. No matter how good the DA, I could not get an 8.0. Had the spark plugs changed, they were coated in Boostane. On the way home from the shop I did a 60-130 run with a high DA on Map 0, 8.01. My 1/4 mile times also dropped back into the low 10's from 10.6's.

Not sure exactly how long it was. Maybe 4-6 weeks of use. I was mixing enough with E30 to get up to 98-100 octane. If you're just mixing to get to 93-94 maybe it wont be as bad.

[JBA87]

I continue to experience some strange issues

So I went to test the DME this morning to see if there was any improvement (yesterday was raining most of the day).

0-60s continue to get noticeably worse. All runs were north of 3.5sec.

I am noticing that in first gear car feels very slow. Almost like a semi-limp mode on reduced power / boost / acceleration .

I was able to get a log of one of the weird runs that exhibits this issue of reduced power. To be clear: launch control was engaged, there was no noticeable wheel slippage, so those are not explanations

What I did experience was a 3.94 0-60 .. (wtf?).. and acceleration in first gear was noticeable very very slow. Dragy indicates that I barely broke 0.5gs when normally this is closer to 1g

The log shows a very weird boost curve .. with virtually not boost until car shifts into 2nd

[onfireX5]

Ask DME about Throttle Closure.

[JBA87]

Not sure why that dragy says 20% slope

Here is another

[MNoob]

Originally Posted by gpdriver17

It worked great for me, until it didn't. All of my 1/4 mile, 60-130 times, etc. increased by about a half of a second for several weeks. For example, my Map 0 60-130 was 8.00 when I started using Boostane. After a few weeks of it, it was 8.50. No matter how good the DA, I could not get an 8.0. Had the spark plugs changed, they were coated in Boostane. On the way home from the shop I did a 60-130 run with a high DA on Map 0, 8.01. My 1/4 mile times also dropped back into the low 10's from 10.6's.

Not sure exactly how long it was. Maybe 4-6 weeks of use. I was mixing enough with E30 to get up to 98-100 octane. If you're just mixing to get to 93-94 maybe it wont be as bad.

Wasn't there also a gap issue? Could the boostane have caused the gap to increase? Or did a more aggressive tune (piggy, etc) affect gap? The replaced plugs had a correct gap and were free of boostane gunk. Totally could have been boostane. But, not definitely.

[gpdriver17]

Originally Posted by MNoob

Wasn't there also a gap issue? Could the boostane have caused the gap to increase? Or did a more aggressive tune (piggy, etc) affect gap? The replaced plugs had a correct gap and were free of boostane gunk. Totally could have been boostane. But, not definitely.

I don't think anything can cause the gap to increase once they are installed. You have to pull on those things pretty hard with pliers to open it up at all. Yeah, I don't have any proof it was Boostane. But after paying $550 to get new plugs and seeing the performance come back immediately, I'm done with it.

[gpdriver17]

Originally Posted by JBA87

Not sure why that dragy says 20% slope

Here is another

Yeah something's wrong with that. I ran Map 4 (valet mode), without launch control, once for fun and got high 3's 0-60. Timing is low again. Are you running Map 6 to add boost to the DME tune? Please get some better gas today! A few gallons of E85 or 260GT.

[onfireX5]

Originally Posted by gpdriver17

Yeah something's wrong with that. I ran Map 4 (valet mode), without launch control, once for fun and got high 3's 0-60. Timing is low again. Are you running Map 6 to add boost to the DME tune? Please get some better gas today! A few gallons of E85 or 260GT.

I went back and pulled some of my old JB4 logs to compared.

This last log he posted is wacked everywhere .

As you noted timing is dropping to the basement again up top.

Launch RPM is too low.

Throttle opening is compromised down low.

Boost command is wayyyyy low at the launch...partially due to a partially closed Throttle.

After he releases the brake, the Boost should hit FAST....but it slow slopes due to everything...

I still wonder if JB4 is incorrectly installed and causing conflicts...

[JBA87]

It's DME with Map 3 but Mo made some temporary adjustments in the universal settings while the car adapts (see pic below)

He said boost is low because he purposefully made it that way as car adapts

While it's possible something is installed improperly w JB4 I think I would have throw an error

I'll have a shop look

Plus car is pulling strong on highway

Raced a ZL1 LE today on highway and (in wrong gear 6th vs 5th) I was riding with him and once shifted into correct gear pulling on him

[JBA87]

Originally Posted by onfireX5

I went back and pulled some of my old JB4 logs to compared.

This last log he posted is wacked everywhere .

As you noted timing is dropping to the basement again up top.

Launch RPM is too low.

Throttle opening is compromised down low.

Boost command is wayyyyy low at the launch...partially due to a partially closed Throttle.

After he releases the brake, the Boost should hit FAST....but it slow slopes due to everything...

I still wonder if JB4 is incorrectly installed and causing conflicts...

What does your launch RPM look like

Do you have a comp?

[gpdriver17]

Why are you running map 3 and a DME tune? Map 2 alone seemed like it was making too much boost for pump gas. I've never heard of running a map, other than 0, with a tune. It does look like it's taking a long time to build boost. Not sure why that would be. I feel like you're changing too many things too fast. I'd go with just the DME tune and get better gas for a week and see what happens.

[onfireX5]

Originally Posted by gpdriver17

Why are you running map 3 and a DME tune? Map 2 alone seemed like it was making too much boost for pump gas. I've never heard of running a map, other than 0, with a tune. It does look like it's taking a long time to build boost. Not sure why that would be. I feel like you're changing too many things too fast. I'd go with just the DME tune and get better gas for a week and see what happens.

+1