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-   -   tuning question (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/tuning-question-884191/)

arghx 01-27-10 09:58 AM

In my (admittedly limited) experience the MS is more sensitive to electrical noise than some of the other options. I had the Zeal pnp kit a few years ago.

RotaryEvolution 01-27-10 02:27 PM


Originally Posted by Aaron Cake (Post 9765040)
The MS is a good ECU, but the DIY part of it scares a lot of people (or should scare them!). Quality writeups help control this but most people don't have the electronics skills necessary. In a way, this is good because it stops people from creating disasters of a MS install when they should go off the shelf and get a Haltech/Microtech/etc. But there is nothing inherently wrong with the Megasquirt.

Just this summer I tuned a Megasquirted 2nd gen with a 13B RE and a GT35R. Put down 380 RWHP and 320 FT-LBS of torque.

i'm sure it works, Icemark used it in his car for the longest time though he was having issues with timing becoming out of whack sometimes and i don't know of too many people who knew more about electronics than he did. simply put, it isn't for amateurs. i do plan on playing with one at one point but so far it is just easier to install one of the proven programmable ECUs and save the headache for another time.

Aaron Cake 01-28-10 09:31 AM


Originally Posted by arghx (Post 9765053)
In my (admittedly limited) experience the MS is more sensitive to electrical noise than some of the other options. I had the Zeal pnp kit a few years ago.

As long as shielded cable to the CAS is used, then there shouldn't be too many problems. The noise is really only an issue with high tooth count wheels and missing teeth (60-2, for example). The dual trigger 24-2 in the FC is pretty good. But shielded cable is a must, as well as bypassing the G+/G- line with a 0.01uF capacitor. The MSII also has a much better noise filter then the MSI.


Originally Posted by Karack (Post 9765643)
i'm sure it works, Icemark used it in his car for the longest time though he was having issues with timing becoming out of whack sometimes and i don't know of too many people who knew more about electronics than he did. simply put, it isn't for amateurs. i do plan on playing with one at one point but so far it is just easier to install one of the proven programmable ECUs and save the headache for another time.

I agree totally. Many amateurs get into the Megasquirt because it appears to be cheapest option, but it turns into nothing but a hassle. Being cheap is the wrong reason to go MS, unless that cheapskate also has a lot of electronics experience. :)

I am always torn on the MS. On one hand, it is a great ECU. On the other hand, in the hands of most people, it is a disaster...

Obligatory plug for my MS writeup:
http://www.aaroncake.net/rx-7/megasquirt

Tofuball 01-28-10 10:35 AM


Originally Posted by Karack (Post 9763079)
why do you think that is? i have seen many people build it, start using it and completely switch to another EMS. do those guys still even make the plug n play kits for em? yes i know they work, but can they work flawlessly for years on a turbo car? that's the question i would like to see someone prove.

Yeah, we still sell them.

I drove with the first one on my vert for a year or so till I sold it.
I had it on my modded TII for over a year with no issues.
And it's not related, but it's been in my Vanagon for years :)


Originally Posted by arghx (Post 9765053)
In my (admittedly limited) experience the MS is more sensitive to electrical noise than some of the other options. I had the Zeal pnp kit a few years ago.


Ken fixed that with a new design.


Originally Posted by Aaron Cake (Post 9767412)
I am always torn on the MS. On one hand, it is a great ECU. On the other hand, in the hands of most people, it is a disaster...

VERY TRUE.

Too many people just plug it in and expect that to be golden, and then start messing with the numbers randomly when they have no tuning experience. X_X

RotaryEvolution 01-28-10 01:19 PM


Originally Posted by Tofuball (Post 9767542)

Too many people just plug it in and expect that to be golden, and then start messing with the numbers randomly when they have no tuning experience. X_X

and then ask why their car is messed up and/or start asking for people to come out and help them because they can't afford a tow.

if you can't afford to play then you shouldn't be playing! i hate people who mod cars and do no research beforehand.. i'm rebuilding one of my old motors because someone with no experience started bolting things on with no experience.

Tofuball 01-29-10 07:35 AM


Originally Posted by Karack (Post 9767918)
and then ask why their car is messed up and/or start asking for people to come out and help them because they can't afford a tow.

if you can't afford to play then you shouldn't be playing! i hate people who mod cars and do no research beforehand.. i'm rebuilding one of my old motors because someone with no experience started bolting things on with no experience.

Oh, don't complain about it too much, I'm sure we've both gotten our share of super-cheap parts from such automotive abortions :)


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