From knowing nothing to having a Thunderbird supercharger on an m20b27i

[whodwho]

Does the MS have DFCO (Deceleration Fuel Cut Off)? I vastly prefer aggressive DFCO settings over continuing to inject fuel on overrun/deceleration.

+1 and if you start trying to leaning out the lower VE bins on decel it messes with your free rev AFRs

It does have it under extended > overrun fuel cut

[The Dark Side of Will]

Mmmk, a couple more questions. When I go from coasting to super light throttle, I see the AFR flash quickly to 17-18 for just a blink, then down to 13.xx for the rest of the acceleration. Is this bad?

At light throttle, no. Do the engine buck, snort or hesitate?
Basically, the problems with lean mixture relate to either detonation or exhaust temperature. Detonation can be detected immediately (assuming you have the equipment). Just a blink to a lean mixture does not give exhaust temperature enough time to damage anything (you probably couldn't even detect that on an EGT probe, if you were running one).

Also, now at just enough throttle to maintain speed, I'm at AFR 15.3-5. No surging, no pinging. Are these numbers dangerous? And finally, when decelerating, AFRs are in the 12-13 range. Normal?

Sounds fine... as long as the engine has enough torque and is responsive to throttle inputs, that's fine.
Does the MS have DFCO (Deceleration Fuel Cut Off)? I vastly prefer aggressive DFCO settings over continuing to inject fuel on overrun/deceleration.

[Ether-D]

Twin charging is a turbo and a supercharger on the same motor.

[Ether-D]

Mmmk, a couple more questions. When I go from coasting to super light throttle, I see the AFR flash quickly to 17-18 for just a blink, then down to 13.xx for the rest of the acceleration. Is this bad? Also, now at just enough throttle to maintain speed, I'm at AFR 15.3-5. No surging, no pinging. Are these numbers dangerous? And finally, when decelerating, AFRs are in the 12-13 range. Normal?

[Q5Quint]

Brodeo.... my god. I am in. Thanks for the heads up on my springtime goals.
There is also a springtime meeting literally this weekend. Cant make it but now I know to check. Thanks!

MS does seem expensive... but my god the plug and play is so worth it. I probably spent 300-400 my first time around buying a used one and splicing everything into a relay board to make it work. You know, just in case I ever wanted to go back?

I then spent probably $10,000 in hours trying to figure out what the hell I had soldered wrong, or what connection was loose, or why 1/2 my injectors were just open 100% of the time spraying fuel onto my turbo and melting my cat (cracked relay board, heh).

It was a great learning experience sure, but once you call Keith you never want to go back.

Is "twin-charging" anything like "night crawlers"? If so then yes.

[MaxBell]

That's funny that MS was almost half your cost.

[Ether-D]

Oh snap- I keep forgetting you are in TN as well. I am about 20 minutes from the boarder in NC, but I just realized how long TN was and that you might be 5 hours away hah!

We should do a e30 campout in the mountains or at a lake or something this summer. That will give me motivation to finally slap the charger on mine.

Congrats on everything working- and also votes for some video/pics asap.

Dude, keep an eye on the Southeast sub forum. Have you been to a Brodeo? It's a big camping trip/fast driving weekend for e30 owners here in the southeast. The spring one is in May. I'll be going. You should definitely go.

[TheTacoMan]

Oh snap- I keep forgetting you are in TN as well. I am about 20 minutes from the boarder in NC, but I just realized how long TN was and that you might be 5 hours away hah!

We should do a e30 campout in the mountains or at a lake or something this summer. That will give me motivation to finally slap the charger on mine.

Congrats on everything working- and also votes for some video/pics asap.

Are you too pursuing twin charging?



Also I await more videos ;D

[Q5Quint]

Oh snap- I keep forgetting you are in TN as well. I am about 20 minutes from the boarder in NC, but I just realized how long TN was and that you might be 5 hours away hah!

We should do a e30 campout in the mountains or at a lake or something this summer. That will give me motivation to finally slap the charger on mine.

Congrats on everything working- and also votes for some video/pics asap.

[Ether-D]

All in good time, all in good time...

[TheTacoMan]

Good job. Now Id like to see some pulls :D

[Ether-D]

Depends on whose swap it was. ;)

Congrats man, I know you're stoked!

Thanks Chris.
You know I have a smaller pulley for later...

[agent]

A local e30 guy took a ride with me and said it felt like his s50 swap. Idk what that means, but some will.

Depends on whose swap it was. ;)

Congrats man, I know you're stoked!

[Ether-D]

And Quint, that little clip you put up is perfect. That's exactly how I feel.

A local e30 guy took a ride with me and said it felt like his s50 swap. Idk what that means, but some will.

Drum roll please…..

Supercharger Project:

Blower - $100 (CL)
Intake intercooler - $80 (Ebay)
Aluminum plate - $70 (Ebay)
Weld up manifold - $156 (local dude)
Radiator - $80 (Ebay)
Fittings - $15 (Ebay)
Pump - $26 (Ebay)
Bypass valve - $46 (Ebay)
S/C Belt $30 (O'reilly)
Hose - $15 (O'reilly)
Tube and air flow - $9 (Ebay)
Megasquirt - $705 (Whodwho)
Wideband O2 sensor - $160 (Ebay)
Injectors $8 (Pull-A-Part)
Adapter for P/S pulley $35 (Thatphysicsguy)
have crank pulley turned $0.00 (me)
IAT $7 (Ebay)


Running total $1542

[Ether-D]

Damn guys. I can't tell you how good I feel right now. This bitch is on fire. In a good way. Real good. Thank you so much.