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Tried multiple chips? Which is the best for an '88 924S?

It seems like there's a lot of choices out there, i.e. Weltmeister, Authority, Max HP, etc. Has anyone tried more than one? I've tried the Weltmeister but noticed hardly any difference. Just wondering.

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Old 05-25-2010, 04:02 PM
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I've got the 944MAX 91 octane chip tuned by Russel Berry and they're sold over on Lindsey Rancing's site. It brings the part throttle maps alive, more low end torque, a little more power up top, and a 7K rev limit. The first chip I've tried and I have no interest in trying anything else it's that good. I don't see it listed on the site anymore, but they used to offer a race fuel tuning that was for 93 octane and higher. Might be worth calling them if you're interested.
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Old 05-25-2010, 07:06 PM
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I don't know what you are expecting, but a chip will only net you about a 10% increase in hp and torque, along with the higher rev limit. That should be noticeable though. But I suppose that the more aggressive timing curve of a "high octane" chip would get you a bit more than that, at the cost of spending more at the pump.
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>gray 89 951S - K27/8, MAF, 3" intake, 3" exhaust w/separate waste pipe, 55# inj, late cam; >red 87 924S - chip, K&N, punched-out cat&muffler >black 80 924 - (sold) >maroon 77 924 - auto (sold)
Old 05-26-2010, 06:17 AM
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Let me add that the 928 is the only exception to the the 10% rule, that I am aware of. This is because it uses separate ignition and fuel computers. In the case of the 928, you can gain up to about 20% with a pair of chips.
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>gray 89 951S - K27/8, MAF, 3" intake, 3" exhaust w/separate waste pipe, 55# inj, late cam; >red 87 924S - chip, K&N, punched-out cat&muffler >black 80 924 - (sold) >maroon 77 924 - auto (sold)
Old 05-26-2010, 06:23 AM
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Bear in mind, the '88 924S had higher comp pistons, so the chips may not be set up properly for that version of the motor, may have been specifically for the earlier setup...might see if you can find a chip that is specifically designed for the ~160HP '88 motor.
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Old 05-26-2010, 07:12 AM
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Yea, that might gain you another full horsepower! Sixteen versus 15.
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>gray 89 951S - K27/8, MAF, 3" intake, 3" exhaust w/separate waste pipe, 55# inj, late cam; >red 87 924S - chip, K&N, punched-out cat&muffler >black 80 924 - (sold) >maroon 77 924 - auto (sold)
Old 05-26-2010, 09:21 AM
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My point was, I wouldn't assume the '88 DME and the earlier DME have the same maps. It's quite likely that the '88 DME is optimized for the higher comp pistons, and may be equal to (or even better) than the aftermarket chips, at least in terms of fuel maps and ignition curves, if not the redline. So putting in an aftermarket chip might have negligible or negative impact on an '88.
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Old 05-26-2010, 09:45 AM
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Thanks for the input. I'm not expecting huge increases in anything... but for the cost of some of these chips, I'd expect to notice a little something. Like I said about the Weltmeister chip, I didn't notice much of anything.
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Old 05-26-2010, 09:53 AM
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Are you running premium fuel? Required by most of these chips, AFAIK.
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Old 05-26-2010, 10:15 AM
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Quote:
Originally Posted by wild man View Post
In the case of the 928, you can gain up to about 20% with a pair of chips.
Jesus, that's ridiculous.
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Old 05-26-2010, 10:15 AM
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Quote:
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Jesus, that's ridiculous.
Sure is. That'll put a GTS WELL over 400hp.
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>gray 89 951S - K27/8, MAF, 3" intake, 3" exhaust w/separate waste pipe, 55# inj, late cam; >red 87 924S - chip, K&N, punched-out cat&muffler >black 80 924 - (sold) >maroon 77 924 - auto (sold)
Old 05-26-2010, 10:23 AM
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Quote:
Originally Posted by ideola View Post
Are you running premium fuel? Required by most of these chips, AFAIK.
I'll be using 91 octane.
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Old 05-26-2010, 05:53 PM
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Is that the best octane you can get?
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Old 05-26-2010, 07:11 PM
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944MAX chips include the 88 in the late tuning so I don't know if there's a difference for the high CR motors. I almost remember there was a specific chip for 88 back when I ordered mine, but I can't remember. Give Lindsey a call, or even PM Russel...he's around here somewhere, rberry I think. He's extremely helpful if you have any questions.
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Old 05-26-2010, 08:03 PM
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Quote:
Originally Posted by ideola View Post
Is that the best octane you can get?
That's the best I plan on using. This car is just gonna be a daily driver. I'm only looking to make it a little more fun to drive. Most of my time and energy will be spent on my 911s. Not that I consider the 924 to be a second-class citizen or anything...
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Old 05-26-2010, 09:00 PM
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Quote:
Originally Posted by HondaDustR View Post
944MAX chips include the 88 in the late tuning so I don't know if there's a difference for the high CR motors. I almost remember there was a specific chip for 88 back when I ordered mine, but I can't remember. Give Lindsey a call, or even PM Russel...he's around here somewhere, rberry I think. He's extremely helpful if you have any questions.
I'll do that. Thanks!
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Old 05-26-2010, 09:02 PM
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Russell was happy to do RoW 1985.5< cars which I enquired with him embarassingly 18mths ago (cos I'm still classing it as a low priority upgrade for now). They are higher compression than the '88 engines.

All he wanted to know was the # on the chip in my DME to know if i had an o2 sensor or not and what fuel I intended to use (98 ron).
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Old 05-26-2010, 10:43 PM
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Quote:
Originally Posted by ideola View Post
My point was, I wouldn't assume the '88 DME and the earlier DME have the same maps. It's quite likely that the '88 DME is optimized for the higher comp pistons, and may be equal to (or even better) than the aftermarket chips, at least in terms of fuel maps and ignition curves, if not the redline. So putting in an aftermarket chip might have negligible or negative impact on an '88.
I apologize for putting it in the context that I did, but no matter what your compression is, it's STILL a 10% gain. I think that the 88 924S's still ran 24-pin, so a 85.5-87 944 chip WILL get you your 10%. BTW, I still have an extra one, if anyone interested.
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>gray 89 951S - K27/8, MAF, 3" intake, 3" exhaust w/separate waste pipe, 55# inj, late cam; >red 87 924S - chip, K&N, punched-out cat&muffler >black 80 924 - (sold) >maroon 77 924 - auto (sold)

Last edited by wild man; 05-27-2010 at 07:33 AM..
Old 05-27-2010, 07:25 AM
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The pinout is irrelevant as far as mapping goes. My car was technically supposed to have a 24 pin chip (unless all 924S's are the exception to the rule) but it had a 28 pin chip inside. The knucklehead that is the PO included a Weltmeister chip with the car and I ended up selling it for $20 since I thought I couldn't use it. There is a way to use a 24 pin chip in a 28 pin DME. The mappings change only as needed for the model of the car...the physical differences in the two chips are purely hardware.

http://www.the944.com/88_to_86.htm

Anyway, the point is, I needed a low compression tuning in essentially a 88 version DME, and the LR website wasn't specific about if there were exceptions or differences for the 924S, 87 cars, etc. I emailed LR and described the situation and he had Russel make me up a pre 88 tuning in a 28 pin chip. Now there's a comprehensive list of all the combinations in the dropdown menu on the product page. Know what pin count you need and what map you need and you'll probably get one.

Actually, just go right to the source. http://www.maxhpkit.com/

He's been tweeking the 944MAX for awhile and it's at version 7 now. Tuned both on the dyno and in extended field testing. Really reworked the midrange and part throttle maps. There is a tuning offered specifically for the 88, available in 91, 93 and 100 octane tunings. The chip was tuned for a test pipe, so although the midrange and low end will fatten up, the top end won't really gain as much with a cat in place. Russel just advised to run -3% on the FQS (which I haven't yet tried). I have run mine both with and without (especially with a higher flowing muffler) and yes, it seems a bit quicker without one, but still noticably better from stock either way.
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Last edited by HondaDustR; 05-27-2010 at 10:14 AM..
Old 05-27-2010, 10:02 AM
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Some of that newer hardware such as the multiboard DOES have it's advantages, as does firmware for 100 octane fuels. There is also the tweaks for individual years and compression levels, fuel injector sizes, ect. But as said, these are only tweaks. I don't think they gain you all that much over the more broadly tuned EARLY aftermarket chips, unless you are also raising boost, in order to take full advantage of the higher octane fuel and larger injectors. It may sound like I'm talking turbo here, but it applies to the N/A realm, just as well. If it sounds like I am biased towards the older ones, let me just slide it in here that in fact I do have some AES, weltie, and even some stock chips, that would be willing to part with. It's nice to know that 24 boards can go 28 chip without much hassle, and 28 boards can go 24 chip, with practically no effort. Thank's for listing that 1st page, I've never seen it before.

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>gray 89 951S - K27/8, MAF, 3" intake, 3" exhaust w/separate waste pipe, 55# inj, late cam; >red 87 924S - chip, K&N, punched-out cat&muffler >black 80 924 - (sold) >maroon 77 924 - auto (sold)
Old 05-27-2010, 11:47 AM
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