 914 megasquirt info- Scott's 1.7 |
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| Scott-thundercat |
 May 14 2007, 11:31 AM
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#1
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Member  Group: Members Posts: 159 Joined: 16-October 06 From: Reno, NV Member No.: 7,049  |
hey, just bought a megasquirt complete kit from DIYautotune. saw a few good threads about em with 914's on here. any other suggestions? i have a stock 1.7 liter. reason i bought it is that my fuel trigger points went out, so 195 vs 145 it wasnt a tough decision since i've been wanting to build one for a few years now.
anyhow any help or tuning tables would be appreciated! i saw the 2 liter tuning tables. anything for a 1.7? |
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| yarin |
May 14 2007, 11:55 AM
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#2
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'14-X'in FOOL Group: Members Posts: 988 Joined: 13-May 03 From: Guttenberg, NJ Member No.: 693 Region Association: North East States |
Check my sig for pics of my install. I posted a lot of info on my install, questions, etc..
I converted from MS to carbs for about a grand all inclusive: stock 2.0L parts, MS II V.3.0, relay board, relay box, wibeband O2 sensor. Without a wideband sensor you are realyl tuning by ear. Checkout msefi.com and megasquirt.info for instructions. I don't have 1.7 tables, sorry. There are a few guys that might, send toon1 a message. Feel free to post questions. Don't expect to have your car converted and driving in a weekend though (IMG:style_emoticons/default/smile.gif) Have fun! |
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| toon1 |
May 14 2007, 12:12 PM
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#3
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Senior Member Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022 |
which version did you buy? MS-I, 2 , V-2.2,3.0? Did you buy a relay board? What TPS are you going to use.
Get a 02 sensor, the LC-1 it will make tuning easier and give you constant feedback and AFR adjustment. The conversion is not that hard to do, ask alot of questions. I have mine running on a 1.7, the constants and AE tables are close.let me know when you are ready for them. |
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| Scott-thundercat |
May 14 2007, 03:49 PM
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#4
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Member Group: Members Posts: 159 Joined: 16-October 06 From: Reno, NV Member No.: 7,049 |
thanks for the quick response guys. version 3 PCB, megasquirt I. can i use a 5 wire wide band O2 sensor without the wideband controller? i saw there are some cars that use these- and much cheaper than wide band kit! no relay board- just the MS itself. yeah i'm expecting this to take a bit of time- but i prefer DIY stuff to paying serious money to do similar things.
thanks yarin- i liked your info on it- some very helpful stuff! |
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| toon1 |
May 14 2007, 05:18 PM
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#5
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Senior Member Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022 |
MS-I V.3 three is a good buy. It has alot of options avial. fo future upgrades.
You will need a controller for the 02 sensor as it is what sends the signal to MS. MS only makes the adjustments not the calculations. LC-1 is the one to get, most of the defaults are set for the LC-1. Register on the MS site if you havn't already. you will get good advice from the guy's there. Keep an eye on the calssified section , every once in a while there are some good deals 02 sensors. |
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| rfuerst911sc |
May 14 2007, 05:43 PM
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#6
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Advanced Member Group: Members Posts: 2,158 Joined: 4-May 06 From: Dahlonega , Georgia Member No.: 5,980 Region Association: South East States |
If anyone needs the LC1 O2 sensor itself I have two of them from a failed EFI attempt. PM me if interested. Also have 30 lb. per hour injectors ( 6 ) and 23 lb. per hour ( 6 ). Also have a relay board.
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| brer |
May 15 2007, 03:01 PM
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#7
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Advanced Member Group: Members Posts: 2,555 Joined: 10-March 05 From: san diego Member No.: 3,736 Region Association: None |
I'm working on a MSI v3.0 right now as well.
still building the kit actually. (IMG:style_emoticons/default/tongue.gif) I'm starting off using the stock plenum and injectors and ignition, then moving on slowly to control the whole lot. TPS is not totally necessary from the information I've been given. Apparently MS can calculate what it needs from the pressue sensor alone. Might not be optimal but it will work it out according to the guys at DIYAutotune. I'd be keen to see your tables guys. (IMG:style_emoticons/default/clap56.gif) |
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| bd1308 |
May 15 2007, 03:05 PM
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#8
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
brer,
the MS will actually calculate FI fuel amounts, etc from the TPS alone if needed. Granted its not as accurate as the MAP sensor, but in the event of an emergency, it could come in handy. |
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| toon1 |
May 15 2007, 04:01 PM
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#9
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Senior Member Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022 |
the MAP sesnor is the most important item in the MS system for reading the amount of fuel to be delivered. It acts the same as the MPS in the stack 914 system.
You can get the car to run OK without a TPS, you have to richen the bins in the AE tables at the different RPM ranges. Retro fitting a TPS was one of the easiest things to do on the coversion. I can take some pics of what I did if you like (IMG:style_emoticons/default/biggrin.gif) Keith |
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| hex123 |
May 15 2007, 06:27 PM
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#10
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Newbie Group: Members Posts: 34 Joined: 4-April 07 From: Los Angeles Member No.: 7,644 |
(IMG:style_emoticons/default/agree.gif)
The tps is very easy I grabbed one from the junk yard off a 88 nissan 200sx it has the same D shaped hole that mounts into the existing throttle body shaft. Someone here I think used one from a 88 mazda mx6. you just need a tiny bit of 1/4 in aluminium plate drill some alternate holes to be able to mount it. if you dont want to go to the junk yard I think nissan one is only 60$ or less new at the FLAPS This mod is popular enough that we need to keep this thread going. no surprise but the MS forums dont have much with regard to installing and tuning on a 914, |
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| Scott-thundercat |
May 21 2007, 02:15 AM
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#11
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Member Group: Members Posts: 159 Joined: 16-October 06 From: Reno, NV Member No.: 7,049 |
thanks for all the input guys! so far i am on step 50- just started tonight. built the stim first- then started on the megasquirt. all the tests have come back A okay- good stuff! i'm just going to trigger off the coil- so i guess i can leave the VR circuit out? i will for now- and worst comes to worst will install it later. this thing is pretty fun to build! my soldering iron has made it a bit difficult as it is one of the "gun type" so the tip is too bulky for my needs and i keep touching the board- no real damage though. any how- if anyone else has any info- please post up! please post some pics of the TPS sensor! thanks guys!
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| Scott-thundercat |
May 21 2007, 02:18 AM
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#12
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Member Group: Members Posts: 159 Joined: 16-October 06 From: Reno, NV Member No.: 7,049 |
nevermind forgot i put pertonix in it! so a hall effect sensor it is!
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| Scott-thundercat |
May 21 2007, 02:34 AM
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#13
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Member Group: Members Posts: 159 Joined: 16-October 06 From: Reno, NV Member No.: 7,049 |
hmmmm. so i have a hall sensor- but i am going to be triggering off the coil for now (one thing at a time- i'll do ignition timing later), so i guess i assemble if for off the coil triggering- and then later i can go back and remove the components i need to to control ignition timing when i get brave?
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| mrhurtalot |
May 21 2007, 02:49 AM
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#14
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VRRRRRRROOOOOOOOOM! Group: Members Posts: 323 Joined: 5-October 06 From: Yukon, Oklahoma Member No.: 6,996 |
whats the cost for a system fora 2.0? id love this. maybe id put that ol pocket pc to use finally!
(my new phone does everything the ppc was purchased for LMAO!) |
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| Mueller |
May 21 2007, 03:32 AM
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#15
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914 Freak! Group: Members Posts: 17,155 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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QUOTE(mrhurtalot @ May 21 2007, 01:49 AM)  whats the cost for a system fora 2.0? id love this. maybe id put that ol pocket pc to use finally! (my new phone does everything the ppc was purchased for LMAO!) I too bought another MS last week, I "think" it's fully assembled...still need to load the latest software on my laptop....I got the V3 MSII version as well, went thru "glens garage" bare minimum MS runs about $150 (fuel only, unless you want to cut and add jumpers here and there) the next step for fuel and spark is about $247 (I think that is what I paid for mine) at that price you have to solder it yourself, and that does not include the wiring harness that you must build yourself.... add another $200 or so and you should be on your way to MS depending on what other parts you have at home !!!! |
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| DNHunt |
May 21 2007, 08:48 AM
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#16
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914 Wizard? No way. I got too much to learn. Group: Members Posts: 4,099 Joined: 21-April 03 From: Gig Harbor, WA Member No.: 598 |
Mike, I think for $247 you get to solder. Not bad but it does take a while.
Dave |
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| toon1 |
May 21 2007, 09:46 AM
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#17
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Senior Member Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022 |
QUOTE(Scott-thundercat @ May 21 2007, 01:15 AM) thanks for all the input guys! so far i am on step 50- just started tonight. built the stim first- then started on the megasquirt. all the tests have come back A okay- good stuff! i'm just going to trigger off the coil- so i guess i can leave the VR circuit out? i will for now- and worst comes to worst will install it later. this thing is pretty fun to build! my soldering iron has made it a bit difficult as it is one of the "gun type" so the tip is too bulky for my needs and i keep touching the board- no real damage though. any how- if anyone else has any info- please post up! please post some pics of the TPS sensor! thanks guys! QUOTE(Scott-thundercat @ May 21 2007, 01:34 AM) hmmmm. so i have a hall sensor- but i am going to be triggering off the coil for now (one thing at a time- i'll do ignition timing later), so i guess i assemble if for off the coil triggering- and then later i can go back and remove the components i need to to control ignition timing when i get brave? Hey Scott, build thew board with every componenet, do not OMIT anything because you are not using it. I think the hall sensor input and triggering off the dizzy points (not the stock FI trigger points) to drive the coil for timing are the same circut. they are both sqare wave signals. It explaines in the MS assembly. If you decide to use something later, it will be there , all you have to do is make a couple jumpers and your set. I put everything in mine, even the coil driver. I'm not using it right now but it's there, a couple jumpers and I have spark control. BTW.... when you get to the step of installing the TIP transistors, it's going to be a PITA with a solder gun. It was hard enough tih a small iron. |
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| yarin |
May 21 2007, 09:03 PM
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#18
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'14-X'in FOOL Group: Members Posts: 988 Joined: 13-May 03 From: Guttenberg, NJ Member No.: 693 Region Association: North East States |
QUOTE(toon1 @ May 21 2007, 11:46 AM) QUOTE(Scott-thundercat @ May 21 2007, 01:15 AM) thanks for all the input guys! so far i am on step 50- just started tonight. built the stim first- then started on the megasquirt. all the tests have come back A okay- good stuff! i'm just going to trigger off the coil- so i guess i can leave the VR circuit out? i will for now- and worst comes to worst will install it later. this thing is pretty fun to build! my soldering iron has made it a bit difficult as it is one of the "gun type" so the tip is too bulky for my needs and i keep touching the board- no real damage though. any how- if anyone else has any info- please post up! please post some pics of the TPS sensor! thanks guys! QUOTE(Scott-thundercat @ May 21 2007, 01:34 AM) hmmmm. so i have a hall sensor- but i am going to be triggering off the coil for now (one thing at a time- i'll do ignition timing later), so i guess i assemble if for off the coil triggering- and then later i can go back and remove the components i need to to control ignition timing when i get brave? Hey Scott, build thew board with every componenet, do not OMIT anything because you are not using it. I think the hall sensor input and triggering off the dizzy points (not the stock FI trigger points) to drive the coil for timing are the same circut. they are both sqare wave signals. It explaines in the MS assembly. If you decide to use something later, it will be there , all you have to do is make a couple jumpers and your set. I put everything in mine, even the coil driver. I'm not using it right now but it's there, a couple jumpers and I have spark control. BTW.... when you get to the step of installing the TIP transistors, it's going to be a PITA with a solder gun. It was hard enough tih a small iron. Agreed.. I built every option in to mine. Here is a pic of my $10 junkyard mazda TPS and adapter plate I machined. (IMG:http://farm1.static.flickr.com/53/193061236_8649d5f42e_o.jpg) |
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| Rick_Eberle |
May 22 2007, 01:31 AM
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#19
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Member Group: Members Posts: 390 Joined: 14-January 04 From: Geelong, Australia Member No.: 1,558 |
(IMG:style_emoticons/default/agree.gif) I'm with the other guys, build it with everything.
I'm doing a 1.7, with a Web 86, but I need to pull the motor again to fix a leaking main oil seal. I have it idling, beautifully, but that's it at the moment. The tables for stock engines are probably pretty similar, just adjust the ReqFuel to suit, maybe? |
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| brer |
May 22 2007, 11:05 AM
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#20
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Advanced Member Group: Members Posts: 2,555 Joined: 10-March 05 From: san diego Member No.: 3,736 Region Association: None |
Hey, I've created a public folder for megasquirt files on my Esnips.
The address is http://www.esnips.com/web/914megasquirt I'm not sure if anyone is interested, but i thought it might be useful for people to post tables and files for sharing there. It is accessible to anyone, and if I add you as a member then you can upload files for others to download. A repository of MS files maybe? I'll leave it up as a resource if others are interested and it gets some files added. Let me know what you think. |
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