MegaSquirt Acceleration Enrichment

[gavinc69]

Is anyone using MAP only MegaSquirt Acceleration Enrichment?

If so is there any chance you could post a screen shot of your settings please.

Cheers guys

[drl911]

I found this MAP curve to be satisfactory during the early days of tuning/experimenting, but as you can see I run full TPS accel now.

[Speedfab]

I've tuned a ton of MS stuff... Do it by TPS, or at least set the MAP/TPS bias slider to 75-80% TPS. MAP based always lags behind the engine's actual need during fast throttle opening transients.

[Tippy]

Originally Posted by Speedfab

I've tuned a ton of MS stuff... Do it by TPS, or at least set the MAP/TPS bias slider to 75-80% TPS. MAP based always lags behind the engine's actual need during fast throttle opening transients.

That's my experience too. But I blend 50/50. I use MAP for the smaller transients and TPS for really quick, very long transients.

I may expirement swapping said above thinking out loud.

[xbmwguy]

+1 on the TPS only. Waaaaay too laggy. Don't know what version you are currently running but here is mine. Works flawlessly

[flat6pilot]

Do you actually go lean on acceleration? Or do you just think you need it? I had the accelearion set up on mine when it was NA but when I converted to a boost motor I had to turn it off. It would OVER enrichen when I hit the gas. I tried tuning it down... and down...and down... but even a little was too much.

[flightlead404]

Originally Posted by xbmwguy

+1 on the TPS only. Waaaaay too laggy. Don't know what version you are currently running but here is mine. Works flawlessly

I was actually about to ask the same question as the OP for my FrankenCIS installation. Given that I have no TPS I'm forced to do it all with MAP. Would that curve be a reasonable place to start for a 3.3L stock engine running 1bar?

[drl911]

Any of us can offer a starting point curve, but none will be perfect for another's car. Find a dormant industrial park on a Sunday afternoon and do repeated (and variable) throttle hits in 1st or 2nd gear. If you have an AFR gauge, you can see if it is immediately going lean or rich. Slightly adjust accordingly. The best (and safest) way is to have someone else drive the car and you tweak the settings from the passenger seat until the gauge goes slightly rich and car pulls hard without hesitation.

[xbmwguy]

When I first started tuning megasquirt I thought I " needed" to use map and finally figured out it really sucked for initial tip in for rev matching and all around feel.when version 1.32 came out I got excited about the accelerator pump feature which was great but now with the newest version 1.40 this is the way to go.we will be utilizing wheel sensors on the front wheel and rear creating anti slip ( spin ) differential so now 2nd and most of 3rd will be utilized to the fullest with my high hp tune installed.cant wait.and to think we almost got the boost per gear figured out and working

[gavinc69]

Thanks all, I am using MS2 and only have MAP at the moment (no TPS installed).

I have it set to 100% MAP but when I try to adjust the MAP curve all the blue dots are just bunched up and I can't seem to move then to make a curve at all.

[drl911]

I only know MS3, but you should be able to change the X and Y axis scales of the graph to get a workable resolution.

[xbmwguy]

Gavin I believe you can add a " daughter card" to the ms2 thus making it a ms3. I would suggest also you try to obtain and use a TPS.grab one from the boneyard from a bmw 5 series.your drivability will be night and day

[gavinc69]

Originally Posted by xbmwguy

Gavin I believe you can add a " daughter card" to the ms2 thus making it a ms3. I would suggest also you try to obtain and use a TPS.grab one from the boneyard from a bmw 5 series.your drivability will be night and day

I have a Microsquirt V3 which is in a sealed case so I think I can't upgrade it.

I do have a TPS off a Carrera 3.2 (Part numer 0 280 120309) would this work?

I also did a firmware upgrade to v3.4.2 and great news I can now enter a MAP AE curve
So hopefully I can now get rid of the slight hesitation under very very light throttle only. I think its a little lean in the situation until I throttle it a little more and AFR drops and the hesitation goes. Its fine if I'm heavier with the throttle, no issues there.

The firmware update didn't fix the misfire at 3k rpm though

[dos531]

Originally Posted by gavinc69

I have a Microsquirt V3 which is in a sealed case so I think I can't upgrade it.

I do have a TPS off a Carrera 3.2 (Part numer 0 280 120309) would this work?

I also did a firmware upgrade to v3.4.2 and great news I can now enter a MAP AE curve
So hopefully I can now get rid of the slight hesitation under very very light throttle only. I think its a little lean in the situation until I throttle it a little more and AFR drops and the hesitation goes. Its fine if I'm heavier with the throttle, no issues there.

The firmware update didn't fix the misfire at 3k rpm though

I don't believe a 3.2 tps is going to work. You're going to need a real tps sensor. If you look at my efi conversion parts spreadsheet you can see the tps I used. You will need an adapter to fit it. Turbokraft sells one.

https://onedrive.live.com/view.aspx?resid=89033EA9FB01D9A0!911&ithint=file%2cxlsx&app=Excel&authkey=!AF3xZ4TG0wXhxq0

[drl911]

Originally Posted by dos531

I don't believe a 3.2 tps is going to work. You're going to need a real tps sensor. If you look at my efi conversion parts spreadsheet you can see the tps I used. You will need an adapter to fit it. Turbokraft sells one.

https://onedrive.live.com/view.aspx?resid=89033EA9FB01D9A0!911&ithint=file%2cxlsx&app=Excel&authkey=!AF3xZ4TG0wXhxq0

+1

The "3.2 stock TPS" is basically an on/off switch and not really a throttle position switch by today's definition.

Another excellent source is Clewett Engineering....

TPS Sensor, Adapter & Connector for 3.2, 930, 944, 914-4 [1001-70] - $159.30 : Clewett Engineering, The complete solution for ignition & fuel injection

[flightlead404]

Originally Posted by drl911

+1

The "3.2 stock TPS" is basically an on/off switch and not really a throttle position switch by today's definition.

Another excellent source is Clewett Engineering....

TPS Sensor, Adapter & Connector for 3.2, 930, 944, 914-4 [1001-70] - $159.30 : Clewett Engineering, The complete solution for ignition & fuel injection

Looking at the Clewett TPS it looks as though this could be used while leaving all the CIS in place without modification so that it could be used with FrankenCIS.

Can anyone comment on whether or not this is in fact the case?

Why does the throttle shaft need to be rotated 180?

[drl911]

Originally Posted by flightlead404

Why does the throttle shaft need to be rotated 180?

Unfortunately, the flat on the end of the throttle shaft is 180° out relative to the flat inside the new TPS when it is mounted

[dos531]

Originally Posted by flightlead404

Looking at the Clewett TPS it looks as though this could be used while leaving all the CIS in place without modification so that it could be used with FrankenCIS.

Can anyone comment on whether or not this is in fact the case?

Why does the throttle shaft need to be rotated 180?

Yeah it'll fit with the cis. Flipping the throttle shaft is super easy.

[gavinc69]

Thanks guys

Originally Posted by dos531

I don't believe a 3.2 tps is going to work. You're going to need a real tps sensor. If you look at my efi conversion parts spreadsheet you can see the tps I used. You will need an adapter to fit it. Turbokraft sells one.

https://onedrive.live.com/view.aspx?resid=89033EA9FB01D9A0!911&ithint=file%2cxlsx&app=Excel&authkey=!AF3xZ4TG0wXhxq0

dos 531, thanks for the info, I've ordered the same TPS as plus its connector.