MD Racing Chip....
 

Anyone have an 86-88 NA with one of these? How good is it? How's the price? Does it do EVERYTHING it claims to? Thanks alot people....

What is this MD Racing Chip you speak of, and what does it do? Sorry Im so dumb. Where can I find more info on it. Thanks

Well, the MD racing chip is a chip that is added onto your ECU for the purpose of modifying the fuel maps in order to create more power for MODDED vehicles (in this case an FC I assume). I don't know the specifics on it, as I've not gotten one yet. I would really recommend that you WAIT to get it until you've done all the other mods you plan on doing to the engine. Otherwise, you will have the chip programmed for you car, and then you'll need to have it reprogrammed if you mod it any further. I'm sure it does work well as it's supposed to, though when used with the correct application. My car is very heavily modded and I still don't have one, as I'm planning on doing further modification. I'm not trying to discourage you from doing what you like with your car, but rather attempting to help ya do what's in your best interest. There are quite a few different chips available. Do a search on the forum and you are bound to find some different brands. Good Luck.

-Derek

A search should yield several good thread.
Their website is www.mdrace.com

The chip is PROM (Programmable ROM) the takes the place of the existing ROM chip which has your fuel & spark maps.

You don't have to worry about changing mods requiring new programming. It's basically optimized fuel and spark. Someone did a G-tech before and after and got ~12hp at the wheels.

I had one and know 2 other people who did the upgrade as well. We were all :D with it.

kinda wondering,here..how much can you gain with messing around with the ignition maps?would it not be better to just buy a s-afc,then you can fine tune your fuel,and change it if you do major mods..i dont know how much the chips are,but i bet they are at least as much as a s-afc..right?anyway.later.
d

You gain a lot more torque at lower revs.
With the MD chip, your spark is advanced ~15 degrees at idle and is gradually backed up to ~5 degrees at redline.

I'm not sure, but I think the stock ECU has more RPM mapping points than the Apex fuel & spark products.

I'd imagine you could get similar results with both Apex units combined & a lot of dyno time, but you'd also probably be spending more than the $300 that the MD chip would cost you.

Some people prefer the AFC, also I prefer it. This because you have more option for tunning. If you want search for this in the forum archives. I believe some month ago this was argued in some post about chips.:)

go_speed_go....how much did you pay?

Timing
 

Isn't it usually a good idea to retard the timing at higher boost levels to prevent detonation. I was kinda under the impression that the MD chip did this, or at least brought them back to normal levels.

I was planning on getting the chip now with my minimal mods, and then using a s-afc to tune my fuel once I got more mods, but if the chip is going to advance my timing to the point where it would be unsafe to use on a more modded car, I'll probably skip it.

Does anyone know exactly how the MD chip changes the timing? And am I right about not wanting too much advance with higher boosts, or am I just being overly cautious?

Re: Timing
 

Boost levels? They are talking about NA cars so you know.

Price anyone? I'm just too lazy to call them....Thanks for reminding them that we're talking about NA cars here....Not that I wouldn't mind a turbo....

Oh ya, I believe they are $400. I was thinking of getting one but have gone against it because I believe once well modded you can get the S-AFC & possibly larger injectors if needed and get more than 12HP and have your car running at its prime.

BTW, I'm going all motor(when I get the $). I want to do a rebulid with a somewhat tame street port and polish. Plus, I'm moving to Nevada fairly soon, and I know NO ONE out there. I would getter a more wild port if I knew someone out there that could get me past inspection. That's one thing I'll miss about Jersey. An inspection sticker is a phone call away....lol....OH, before I forget....How much power can an FD fule pump handle? I can one for dirt cheap in great shape....Thanks again people....

The last thread about this said they were $350. I paid $400 for mine ~3 years ago and still thought it was worth the money.

That's ~12 gain peak at the wheels with just doing the ECU.

I agree that you can get more power if you tune on a dyno and mess with the fuel and spark, but unless the dyno time is free, it going to cost a lot more money. At that point, you might as well go with a full EMS.

from: http://www.rx7forum.com/showthread.p...MD%2A+AND+chip

yeah i had one of those for like 6 months, it was great. it improved my 1/4 mile time by .4 second(on average) and 0-60 by .1 second (average) i was impressed, never clocked MPG. the car in general ran alot better b/c the timing i think.
the low end was quite a bit better, and the upper end was a bit better, and the mid area was awesome, like from 3k to 5800 rpm

I will have one for sale for an 88 TII in a couple of months. I'm going Haltech. $400 complete with ECU.

Boost
 

Yeah I did know that he was talking about NAs, but I was asking the question in refernce to the TIIs as well.

Is it the same chip for both (I assume it is) and if it is, is it safe to advance the timing as much on the TII as onthe NAs? OR to put it another way, would you get more power out by having more advance for the NAs? Or to put it yet another way, is this a chip made for TIIs that can also be used in NAs, or the other way around?


is Advancing the spark 15 degrees at idle and backing off to 5 degrees adance at redline safe for Both NAs and TIIs, what about more heavilly modded ones?

I'm not for sure, but I'd assume there is a different one for TIIs than for NAs.

Ya it should be a totally different one I would think.

Yup, they're are two different chips....I'm still wondering why Superchips doesn't make one for us NA people....I think they might have a long time ago, but I'm not sure. Does Jacob's provide you with a chip? That's the ignition I want to go with. Thanks people.

No Jacob's doesn't make any computer chips that I know of. They just do the ignition.

OH OK...thanks alot....

My question deals with the 91 automatic my wife and I bought back in 96. Does anyone know if MD RACE offers one for the 1991 auto tranny? I'll e-mail them to see, but you know how long it normally takes to get a response.

Tim Benton

Yeah, I guarantee they make one for a 91' automatic. It doesn't make any difference which transmission you have (auto or manual) My car is technically an automatic. I did a tranny swap and now have a TII 5-speed in it. I did not swap ECUs though. The automatic ECU can be used with a manual tranny, (but NOT vice versa). I know they make a chip for my car, and therefore they've gotta make one for yours, because mine is a 91' NA with the same ECU as yours.


Derek

Is it the FD that the ECU controls the shift points of the auto tranny? That's the main reason I asked since I didn't know if it did or not. Most FD chip makers don't have one for the auto tranny, Pettit, M2 etc.

Tim Benton