Okay, here is the deal. I'm running a LSVTEC in my '91 Hatch. My ECU has been rechipped to delete rev limit. Every now and then I'll find myself over revving between shifts, or during a launch to 8500-9000 for a split second. I decided yesterday I need a rev limiter to prevent me from over revving.

What are my options? I've been thinking about looking into getting one of those "Spoon" chips from eBay and soldering it in my ECU (Is installation that simple?), just for the purpose of giving me a revlimit.. I don't really care if it makes my car run rich because I have an FPR and a VAFC to compensate.

How would an MSD unit work, and How do they work? What MSD product would I need to give me a rev limit? Any other options or opinions?

Thanks!

 

Just how is your ECU chipped? Does it have a ZIF socket? You could always buy some Atmel 29C256 chips and a burner (such as a willems unit) and burn your own programs, with Uberdata (OBD-I) or BRE (OBD-O). Check out http://www.pgmfi.org, it'll tell you all you need to know Personally,. I'm running a chipped Pw0 ecu with a program that I tweaked to give me an 8500 limit, with some fuel and timing changes.

 

I'm running Mac OS X Jag, I doubt there are burning programs for me. Can you burn me a chip? I'll open up the ECU today to find out if it is a socket, or if the chip is soldered in.

 

if you cant burn you chip, id get the msd rev-limiter you can controll your rev limit by using pills that come with the rev-limiter

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hatchinprogress &raquo;</TD></TR><TR><TD CLASS="quote">if you cant burn you chip, id get the msd rev-limiter you can controll your rev limit by using pills that come with the rev-limiter </TD></TR></TABLE>

Hmm, what all do I need for a setup like that?

 

msd sci ignition control with rev limiter. $239.95

 

Hmm, it seems ECU chipping would be a cheaper alternative... I've seen JDM Spoon ECUs go for less.

 

yeah probably but would one of those be a bit harder to get and not so easy to install?

 

FYI: I found an MSD Soft Touch Rev control, ($80)... Its a spark stopper basically... the best alternative I found.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSVTEC 91 Civic &raquo;</TD></TR><TR><TD CLASS="quote">FYI: I found an MSD Soft Touch Rev control, ($80)... Its a spark stopper basically... the best alternative I found. </TD></TR></TABLE>

This form is alot gentler on the engine than the Honda fuel cut rev limiter. Imagine your motor is tuned on the ragged edge for horsepower, and you hit the rev limiter, and the motor suddenly goes lean because the ECU decided to turn off the fuel, and BAM, you blow the motor because it went lean at just the wrong moment.

Now imagine you have the MSD soft touch rev limiter, and the same motor tuned on the edge hits the rev limiter, and the spark shuts off. So a little unburnt fuel goes through the motor. The rev limiter is so fast, that it fires every other rotation, just keeping it right there at the rev limit. No big deal, and no blown motor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jaker &raquo;</TD></TR><TR><TD CLASS="quote">This form is alot gentler on the engine than the Honda fuel cut rev limiter. Imagine your motor is tuned on the ragged edge for horsepower, and you hit the rev limiter, and the motor suddenly goes lean because the ECU decided to turn off the fuel, and BAM, you blow the motor because it went lean at just the wrong moment.

Now imagine you have the MSD soft touch rev limiter, and the same motor tuned on the edge hits the rev limiter, and the spark shuts off. So a little unburnt fuel goes through the motor. The rev limiter is so fast, that it fires every other rotation, just keeping it right there at the rev limit. No big deal, and no blown motor.</TD></TR></TABLE>

sounds like a winner, i would use both (and in fact i will soon) the spark-cut limiter and a chip, as the chip i use has a launch control which i find useful, even as traction control in first gear.
Stan

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jaker &raquo;</TD></TR><TR><TD CLASS="quote">This form is alot gentler on the engine than the Honda fuel cut rev limiter. Imagine your motor is tuned on the ragged edge for horsepower, and you hit the rev limiter, and the motor suddenly goes lean because the ECU decided to turn off the fuel, and BAM, you blow the motor because it went lean at just the wrong moment.

Now imagine you have the MSD soft touch rev limiter, and the same motor tuned on the edge hits the rev limiter, and the spark shuts off. So a little unburnt fuel goes through the motor. The rev limiter is so fast, that it fires every other rotation, just keeping it right there at the rev limit. No big deal, and no blown motor.</TD></TR></TABLE>

Thanks for the info! Can't go wrong for $80.

 

http://www.azparttrader.com/fo...=1946

get a rev speed meter, that link will show u one for sale by a local person (for me at least) in az, pretty nice, and good price

 

I already bought the MSD Rev control...

 

what is the name/specs of the msd thing? it sounds good but i dont know if i've seen it for sale. does summit sell it?

 

spark kill for rev limiter is good IMO one of my friends thinks otherwise becasue he has a turbo car and talks about all the raw fuel wreaking havok near/after the turbo, but whatever. i dont run rev limiters becasue i dont want my car hitting a fuel cut, but i almost blew up my spare stock b16 the other day from a throttle blip at8000rpm b/c it woudlnt get into 5th hit 9300

 

bump. please answer. hows it working for you?

 

bump.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by johnzm &raquo;</TD></TR><TR><TD CLASS="quote">spark kill for rev limiter is good IMO one of my friends thinks otherwise becasue he has a turbo car and talks about all the raw fuel wreaking havok near/after the turbo, but whatever. i dont run rev limiters becasue i dont want my car hitting a fuel cut, but i almost blew up my spare stock b16 the other day from a throttle blip at8000rpm b/c it woudlnt get into 5th hit 9300 </TD></TR></TABLE>

a lot of the older rally cars used to have a fuel injector mounted ON the turbo; when the driver let off the gas, the injector on the turbo would dump raw fuel into the exhaust turbine, where it would burn, maintaining the turbo's momentum, and keeping boost available for when he re-applied the gas.

looked really cool when they shifted.

i've seen (really fast, highly modded) road-going cars with this too.

so it shouldn't hurt his turbo any.

 

MSD soft touch rev limiter

 

Okay. I had my Soft Touch installed, but it doesn't work. Check this out...



I don't know what to do... I doubt the box is bad. My stock tach stopped working after the install FYI...


Modified by LSVTEC 91 Civic at 11:44 PM 10/10/2004

 

You've got it hooked up wrong. You need to open up the distributor, and use the 2 wires that are directly connected to the coil inside. One is plain white, and the other is the black/yellow. You've connected to the black/yellow and the blue rpm signal wire.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jaker &raquo;</TD></TR><TR><TD CLASS="quote">You've got it hooked up wrong. You need to open up the distributor, and use the 2 wires that are directly connected to the coil inside. One is plain white, and the other is the black/yellow. You've connected to the black/yellow and the blue rpm signal wire. </TD></TR></TABLE>

Hmm, okay thanks.. I was under the impression that the RPM signal was the coil negative... So both white and green wires from the MSD box need to be relocated to the plain white wire inside the coil, and the red wire from the MSD box to the black/yellow inside the distributor cap?

 

yah

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSVTEC 91 Civic &raquo;</TD></TR><TR><TD CLASS="quote">

Hmm, okay thanks.. I was under the impression that the RPM signal was the coil negative... So both white and green wires from the MSD box need to be relocated to the plain white wire inside the coil, and the red wire from the MSD box to the black/yellow inside the distributor cap?</TD></TR></TABLE>

Read the instructions that came with the unit.