Anyone running megasquirt with A/C?

A section dedicated to Engine Mangement Systems & Engine Tuning. Megasquirt, SMS, Haltek, ect.
User avatar
onlytrueromeo
Senior Member
Posts: 2756
Joined: May 16th, 2007, 10:05 pm
Location: Albany, NY

Re: Anyone running megasquirt with A/C?

Post by onlytrueromeo »

I just remember reading a bunch by Shaodome that said he recommends keeping the IAC and the stock ECU to control it. :shrug:

If it truly gets rid of the IAC w/o the consequences then that is a good thing, but I'm still not convinced. I would either need to try it myself or have it tested in the severe cold, since I use my car as a DD I would not want it to break, or be stuck for not being able to start.
Dark_Rider2k3
Regular Member
Posts: 1603
Joined: March 6th, 2007, 1:17 pm
Location: Pittsburgh, Pennsylvania (USA)

Re: Anyone running megasquirt with A/C?

Post by Dark_Rider2k3 »

Well is there any benefit to removing the IAC? (other then being fully standalone.).

I think (for now) I'll keep my IAC. Since I'll be keeping the A/C, I'll need the ECU, so why not run the IAC as well...
User avatar
onlytrueromeo
Senior Member
Posts: 2756
Joined: May 16th, 2007, 10:05 pm
Location: Albany, NY

Re: Anyone running megasquirt with A/C?

Post by onlytrueromeo »

It should clean up the engine bay, and lower the intake air temps, if you have phenolic spacers, since the coolant that runs through the IAC will heat up the TB. The IAC also causes problems when it gets gunked up, there is a large benefit to having it removed via a block off plate in warm weather.

The reason I do not believe removing it will work well in super cold temperatures is because the IAC actually regulates the AIR going into the engine rather than just controlling fuel/spark like megasquirt.
Dark_Rider2k3
Regular Member
Posts: 1603
Joined: March 6th, 2007, 1:17 pm
Location: Pittsburgh, Pennsylvania (USA)

Re: Anyone running megasquirt with A/C?

Post by Dark_Rider2k3 »

onlytrueromeo wrote:It should clean up the engine bay, and lower the intake air temps, if you have phenolic spacers, since the coolant that runs through the IAC will heat up the TB. The IAC also causes problems when it gets gunked up, there is a large benefit to having it removed via a block off plate in warm weather.

The reason I do not believe removing it will work well in super cold temperatures is because the IAC actually regulates the AIR going into the engine rather than just controlling fuel/spark like megasquirt.
okay I see what you mean. Interesting..
User avatar
fowljesse
Supporting Member
Posts: 5676
Joined: March 17th, 2006, 2:59 pm
Location: portland, OR
Contact:

Re: Anyone running megasquirt with A/C?

Post by fowljesse »

I'm very interested in the outcome of this. I've started mine in just below freezing (around 29 degrees) several times. I can see how it could be a problem in colder weather.
'93 GS - P&P DE w/ ZE exh. cams/ pistns, KLG4 IM, 65mm TB, MSnS, Phenos, K&N RAI, UDP, Grnd wires, rear batt, filld MM, torq strt, TWM short shftr, Exedy, Lng tube hdrs 2.5" Side exhaust, H&R sprngs, Poly bushngs, strutbars, Alum. crss mmber&tiebar, 22mm swybar, solid links, Direzzas, leather int, Alpine 9805 stereo & alrm, keyless entry, 10 Boston Accoustics spkrs, Prjectrs, Blaster2, CF hood, FG hatch, Lexan
nolig2278
Regular Member
Posts: 417
Joined: July 27th, 2003, 2:01 am
Location: miami
Contact:

Re: Anyone running megasquirt with A/C?

Post by nolig2278 »

what feeds air into the engine if the idle pipe is not used?

can i just connect my coolant lines by connecting the 2 lines with a hose and bybassing the TB?
this can be done to any BPT setup right? I live in South Florida so it will never be freezing down here.

thanks
94 RS to BPT
2.5 FMIC
MicroSquirt
2.5 Exhaust
[url=https://gilon.levinsonltd.com/mx-3.html[/url]
Post Reply

Return to “Engine Electronics/Tuning”