Danno

Danny, reverse your loops and you'll be right on! Looks like at full-throttle/high-RPM, the DME really does consider the air-flow signal in its injector duty-cycle calculations. One, because signal-massagers DO affect the air-fuel ratio under those conditions. And two, how is it that people are maxing out their injectors at 100% duty-cycle when those settings aren't even programmed into the chips? Like the post TT made elsewhere, there's a two-step decision making process with modifiers laid on top of the chip's data.

Anyway, I just got back from installing Travis's (Superjet.1) MAP conversion. The thing went together pretty easily, much easier than a MAF kit actually. The tuning will take some time, but at least he got the laptop interface with Windows software.

Anyway, now we'll be able to do testing of each individual component to determine their contribution to power output. We'll do dyno tests with the stock AFM & airbox in place (purely as a restrictor since the MAP sensor will be controlling the car). Then we can do a test with the AFM & airbox replaced with a K&N cone filter. Or we can test with just the stock AFM but no airbox. Or a stock AFM with K&N cone filter, etc...

Finally we'll be able to separate the sensor upgrades from the turbo upgrades that typically occur at the same time and muddies the water of performance upgrades so much.

CS Mende

Can't wait to see how the tuning goes!

superjet.1

just pulled the air flow meter danno and i am trying to reprogram the system it does take some time because their is so many perametrs but its starting to come togeather it sounds awesome but i need bigger injectors now!!hey danno email me your phone number i lost it.its realy easy to tune though once you get the drift of it.

superjet.1

just got back from boosted run.Running at 15 pounds of boost feels like 20 pounds its crazy.Way to much wheel spin.I did notice something weird when shifting under boost when the recirculation valve opens(and its loud now)the car jerks real hard and the waste gate makes a tremidus clank!??

Rob

[quote]Originally posted by superjet.1:
<strong>just got back from boosted run.Running at 15 pounds of boost feels like 20 pounds its crazy.</strong><hr></blockquote>

Nice work Superjet.1,

Keep us posted after you get it all tuned in.

Also, What did the total system run you and what all did you get?

Thanks,
Rob

superjet.1

you can get every thing you need for $700.00 what you get is a signal converter with a map sensor built in a computer link box that lets you tune from your lap top and displays it in a graph for and additional 260 dollars you can get a hand tuner that is very nice and compact and has great data streaming.it installs all under the dash 7 wires then toss the afm.

CS Mende

That's awesome superjet!

I'm pretty dern interested in going the route you have. My 87 specs out about the same as yours: testpipe, chips, dualport waste, afpr, ... with 4 discovered cracks in the intercooler tubing and intake tubing. <img src="graemlins/cussing.gif" border="0" alt="[grrrrrrr]" />

From the link: <a href="http://www.carmodifications.com/Link_Poducts_files/products-index-link-tuning.htm" target="_blank">http://www.carmodifications.com/Link_Poducts_files/products-index-link-tuning.htm</a>

Is it correct that what you ordered was the AFMLINK for $560 and the SerialLink for $70? It claims that a remote tuning module is required for the AFMLINK, but I'm assuming that using a laptop is an acceptable substitute.

I'm definitely interested in taking this route in the coming week, and greatly appreciate the input (as I'm sure others do as well!)

~C
<img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />

superjet.1

yes thats all you need but i have yet to use the lap top because i havent a computer cable yet to tie them togeather.im still tuning but im getting closer.i will have a fuel map soon this will help greatly in the future for others going this route.

Paul Bloomberg

I personally know of 3(2.5ltr's) in Phx that make close to or above 400RWHP. Lindsey racing has some charts posted. Gillies car was way above 400 if I remember correctly. If you guy's or is it, the same guy with a different identity, keep saying over and over nobody can make over 350RWHP with a MAF. BS!
If you guys own stock in some engine mgmt company great, but after a while it doesn't look right. All somebody has to do is look in the archives to see this over and over.
As far as people questioning data, How about All the experts post their racing and engine building resumes along with their posts so everyone knows all the track records they or their customers have!

M Danger

well I'll tell you for one, I always thought it was possible and now that we have more proof If i do go with a aftermarket computer, ill certainly be expecting atleast another 50hp atleast.

You said that the exhuast system is making you lose 14hp???
do you have headers/3"downpipe/exhaust,
whats the gt25 turbo equivalent to??

RAD951

I have been reading up this posts, and it sounds pretty good. I am also interestd in doing the MAP sensor conversion. What are all of the mods you currently have on your 951, and are the injectors stock along with turbo. After you get done programming. I will be interested on what settings you are using. $700 is awsome. I was going to put an MAF and future modifications, but this is certainly the best route. Keep us informed.

Danno

" Gillies car was way above 400 if I remember correctly..."

Yes, but it was a 2.8l with all-out mods. It only lasted a month or two before it blew up. Then he tried to go back and sue Huntley. I guess the real problem with most MAF kits is the imprecise ARC2 and inaccurate LED air-fuel ratio meters. There really isn't much of a restriction difference between a MAF and MAP set-up, both are way more free-flowing than the stock airbox & AFM configuration.

So the secret is in pin-point tuning with dyno runs and dialing in the proper air-fuel ratio and ignition timing. Can't do that with an ARC2/ARM1 combo, no way! You can do dyno tuning and burn custom-chips. Or dyno tuning with computer-programmed EFI systems, etc.. Whatever, as long as you can finely tune the system incrementally in multiple zones in different directions. Can't quite do that with an ARC2...

CS Mende

Once again, very very cool. It looks like I'll be putting together a purchase for the system this week.

What are you using for turbo intake piping to replace the stock config? I imagine a housing intended to fit a MAF would work with a silicone hose segment in place of what would be the MAF.

~C

Russ Murphy

Paul,
Point well taken. I'm relatively new to the board and had never seen any evidence of DME car over 400 rwhp. With all the smack-talk that goes on in the hopped-up auto world, you can imagine why I might want to hear some of it backed up and not just third party improvisation. Congrats on your beast!

superjet.1

for the intake im simply using a 10 inch long by 3 inch outside diameter stainless pipe with a k&n filter on the end shoved in the stock intake boot.