New Product: Performance Chip with Matched Injectors for 3.2L Carrera
 

Before I begin, I have cleared this posting with Pelican staff.

I have a new performance product offering for the 84-89 Porsche 3.2L Carrera.
I've been tuning and developing Motronic based solutions for these cars for years now, I have several cars running my true MAF system with flawless results. I've also done a lot of research on improving Air Metering and Fuel Metering for these cars.

I've had many requests for finding suitable replacement fuel injectors, a set of 6 stock injectors cost about $800 if you can even find them. I've had success with some drop in replacements and have shared that info in other threads. But even those lo-imp dropins are getting very hard to find.

Then I had the idea that I could easily use much better modern day 4 or 6 hole disk type injectors, these atomize fuel far better than the 1980s era single pittle injectors. Injectors have come a long way in the last 30 years so why not properly model modern day injectors with a performance chip perfectly matched for use in the stock 3.2L cars? I've already done this with my full MAF system so it was not all that much work to simply make an offering much like my MAF system but this new offering would work with the stock AFM and cost significantly less than MAF.

Price point for the 6 injectors with the custom chip will be at about $800. So for the price of just stock replacement injectors you get a performance chip matched to better modern day injectors. Keep in mind that most stock injectors are now 30 years old and often have compromised flow rates and spray patterns.

Here's what the injectors look like:
http://forums.pelicanparts.com/uploa...1446131951.jpg

These injectors will idle better and fuel better at low flow rates, should have improved fuel economy. To be honest the injectors alone will not improve peak Torque or HP because at those very high flow rates the stock injectors operate well. But at the lower lo-load and idle flow rates these modern disc injectors simply flow much better. Here's a video showing the side by side results for old-school vs disc injectors:
<iframe width="420" height="315" src="https://www.youtube.com/embed/bHf-6ohkgbA" frameborder="0" allowfullscreen></iframe>
This is not my video nor my injectors but it compares disc (on the left) with old-school single pittle (on the right), nice visual aid.

The performance chip has many features with features no one else offers, here's a list:
- Improved cold start
- Prime fuel pump for 3 seconds before cranking
- Optimized ignition coil dwel times
- Major improvements in throttle response
- Better management of the O2 sensor closed loop mode
- All new fuel model, total re-write of the fuel model using modern day practices
- Dyno tuned ignition maps
- Custom tune to meet YOUR particular motor if needed.

As part of the offering you MUST send your DME to me, I copy protect all my chips so they only work in your DME. But the bonus is that I fully inspect your DME for common problems and also convert it to 28 pin chip, it 's returned to you with the custom chip installed for the new injectors. You also get a factory 89 28pin chip as well in case you wish to go back to stock. You can just put back stock injectors and install the 89 chip. The 89 chip is the very best FACTORY tune.

This system is currently installed and running in my car.
You simply mail your DME and you get it back with chip pre-installed and the 6 injectors. Remove the stock injectors install the new ones and snap the DME back in place.
Anyone interested?

If you are going to be a customer you MUST get a decent WidebandO2 gauge installed I recommend the AEM gauges since these are very well made, use the LSU 4.9 sensors and have a output that mimics a narrowband O2. This NBO2 signal can be feed back to the DME so it sees O2 feedback. Basically you take out your existing NBO2 put the WBO2 in it's place and run 1 wire from the gauge back to the original NBO2 harness.

I'm interest.
I am going to be in the market for new injectors and have also thought of purchasing a chip.

Have you run a smog check before and after your injector and chip install? Here in CA smog checks not fun but are a reality. I wonder if your system is CA smog friendly.

This is a great deal, considering the new injectors and the free DME health-check! Were I not putting together a set of ITBs and leaving Motronic, I would be all over this.

What's the spec of the high-imp injectors?

I have not smog checked this setup, but my guess is it will pass without issues so long as the original configuration also passes. The product is new and I can't make promises, I'd prefer first customers not be in CA.

I have full specs on these injectors, I only work with injectors that come fully speced.
High level spec at 36PSI (2.5bar) these are 170g/min about 22lb/hr injectors at that flow rate. All calcs have been properly done to insure they work in a stock 3.2L US or Euro. They are hi-impedance injectors and work flawlessly in our DMEs.

Well, my 85 Carrera starts from cold and idles well. Got 24 mpg on my long road trip. Does not stumble. And you said your items will not improve H.P.? I'm sure you have a fine product but I think I will stay with my $10.00 bottle of Techron every few months vice your $800.

If ever my AFM goes south, I'd be completely ready to go with the MAF setup he offers. But I have my SW chip and the current setup runs fine, and I have no desire to fix something that's not broken.

Nick,

You can certainly stay with stock as is. But do not dismiss the gains that can be had with a well tuned performance chip. Usually about 10-20HP depending on what year the car is and what other changes you may have made. The other bigger advantage is far better throttle response. Of course if your happy with what you have then by all means stay with what you have.

HoW will the use of a Premuffler or cat bypass affect your system. Would the use of your suggested O2 sensor still be necessary?

If you do not have a CAT then you really don't need to have O2 feedback, the DME will run just like the Euro Rest of World cars. My system will work with or without the O2 feedback.

The reason I want you to have a WBO2 is simply because we need to verify and observe the AFRs, it's the best $160 you'll spend on any Air Cooled engine! Knowing exactly what the fuel mixture is at all times is very valuable. I also use this data before we alter anything, I must verify that what you have in stock config has no issues, I can't tune around problems. Even if you purchase nothing from me I highly recommend a WBO2 AFR gauge in our cars.

Sal, does your chip still have the fuel shut-off on off-throttle decel (coasting) that the factory chip has? I find that feature highly annoying, that would be another reason fo this package in my mind.

I can set that fuel cut at any RPM you like or remove it completely. The stock chip cuts the fuel on decel till about 1200RPMs when the injectors come back on. My chip does alter this value and as I said I can tune it as you desire. Can you articulate what you don't like about the decel fuel cut and why? I'm just curious.

And if you want just that area tuned in your current setup I can do that for you as well. I have full understanding of the entire program code in these chips. I've tuned simple things like:
- Decel Fuel Cut
- Rev Limits
- AC on idle speed, can be bumped up if AC is on
- Exhaust popping on decel with open exhaust
and a boat load more.
My chips already improve these areas, especially for non stock motors.

Where is the proof of improvement compared to the competition (stock and aftermarket chips) ?











...

Fair question, I don't work the way most do, I rather have customers do the testing. Here's a few threads of work I've done for customers, some with side by side dyno runs. I have proof points of chip tunes on my car but that's my car. Here's the thing, I offer my customers 100% satisfaction period!

Few customer jobs documented by customers not me:
http://forums.pelicanparts.com/porsche-911-technical-forum/851912-my-87-3-4-maf-project.html
http://forums.pelicanparts.com/porsche-911-technical-forum/864317-amazing-what-difference-professionally-designed-custom-chip-can-do.html
http://forums.pelicanparts.com/911-engine-rebuilding-forum/871561-1985-3-4-build-using-maf-279-56-hp-237-63-rwhp.html

Feel free to contact any customer I've worked with.

I'm looking for folks willing to try the solution and do their own testing.

And if you care to see results on my 3.2L Euro with mods I have this available, just done with these exact injectors and setup:
https://network.perfexpert-app.com/myperfexpert/comparison/wicmMYKZDw+uaH1vrc6hH

My car on this setup is in the 230 WHP area. But the torque improvements at lower RPMs really shine.

But here's the thing, you can't judge a solution by dyno results only. I've seen plenty of tunes with good dyno numbers but horrible street behavior. Most decent tuners know howto extract WOT power but you need more than just this to make a good drivable car.

Euro models?

Yes, actually my personal car is a Euro engine with mods.
No problem building a solution for Euro cars.

Sal, my '84 is quite stock other than having one of Steve's chips in it. I don't track the car, in fact it gets some commuter work as well as weekend drives.

My experience is that the resumption of fuel on my car comes at a somewhat higher RPM that is highly problematic while commuting on surface streets - when trying to flow with traffic smoothly, it seems I frequently end up trying to maintain a speed that is right on the cusp of the cutoff. So any minute change in throttle position to try to adjust speed tends to deliver a surge one way or the other. Makes it look like I don't know how to drive. I wouldn't need to have it completely removed, but moving it to a much higher engine speed (say, 2200 or so) would be ideal.

And I do like the idea of the newer type injectors, especially for the non-WOT driving that I do.

In short, I'm interested, but it might be a few months before this rises to the top of my list.

Hi Arne,
My 84 with Steve Wong chip behaves the exact same way. I notice it in parking lots, on and off the throttle jerks me forward and back. I wouldn't be surprised that Steve could fix the fuel shut off, but a more complete approach might be much better. Also it sounds like low throttle drivability would be enhanced with Sal's injectors as well. Interesting.
Dave

I will vouch for Sal on this one.

Believe when I say, going from 80's era injectors to modern makes idle much better and "around town" drivability much better.

I had 55lb old school low-impedance injectors, and tuning my aftermarket EFI at idle and part throttle was a nightmare.

Went to 80lb new high-impedance injectors, and the idle was leaps and bounds better over the old ones and part throttle was much smoother.

If the 55 and 80lb doesn't register with you what I'm talking about, it's how much fuel delivery they will put out at a given pressure in an hour. The bigger the lb injector, the smaller the opening tImes (PW for pulsewidth) at idle and part throttle. What happens is the super short PW's causes erratic fuel delivery as the injector misfires.

Point is, I went up a huge amount in injector size requiring an even tinier PW, but due to the modern injector design, the idle and part throttle areas greatly improved and smoothed out.

Your car will be transformed.