lock

Ive got my car rolling again and I really need to start working on a custom chip. My first issue is cranking up the idle a bit. Ive been reading over the boards for awhile. Tunercat seems to fit what I want for an editor. question is my 86 IROC uses the $32 bin but Ive seen where the $6E can be used, only you have to disable VATS, 9th injector etc. Since I dont have VATS and I no longer have a 9th it should be no problem. Can someone verify this bin will work for me and why its better than the $32? Id hate paying $20 for the wrong one.

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Mark Lock
- 86 IROC-Z - SuperRammed 383/T56
- -= IROC Online =- - The site dedicated to the IROC-Z

GregWestphal

iTrader: (1)

I'm using the '89 $6E code in my '87 IROC with no problems. I took the ARAP bin, modified it to the stock '87 parameters, then started changing things, usually one at a time, until I was happy (for now). Since you disabled the 9th injector, you may need to change the values in the open loop AFR % change vs. temperature table instead of leaving them all the same number (1.56%) like the stock $32/32B bins do. You could probably just use the values in that table that are in the ARAP chip... I don't know of any reason why the $6E is better than the $32 or $32B bin since you'll be changing things anyways, except maybe Tunercat has more variables to play with for it.

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Greg Westphal
'87 IROC 305TPI/A4

InTech

Start with the 89 .bin and tune from there....forget all about the numbers in the 87 .bin. The algo in the 89 has already accounted for the loss of the 9th injector. The 89 .bin datastream is also 8192 baud instead of the crappy 160 baud in the 87. Disable the vats and never look back. You will be happy.
-Carl

lock

Ok, Where can I nab the 89 .bin? Also, are the tunercat guys on top of things? im probably a month away from burning anything but Id like to go ahead and grab the $6E and start learning all the values that can be modified.

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Mark Lock
- 86 IROC-Z - SuperRammed 383/T56
- -= IROC Online =- - The site dedicated to the IROC-Z

GregWestphal

iTrader: (1)

Go to:

ftp://ftp.diy-efi.org/pub/gmecm/bins/1227165/

and d/l the arap.bin file. From looking at the different variables that TC allows one to change, it looks like they've covered most of the good stuff, plus they update their TDF files with more things to change. I don't think I've ever heard anything bad about them or GMEPro either...

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Greg Westphal
'87 IROC 305TPI/A4

Blade

Hey Greg... What needs to be done to the car if a chip with 89 code is gonna be used on an 87 car ? Disconnect the cold start injector or something ? I need to burn a chip for a friend with an 87 IROC and quite a few mods. I might as well get the ARAP bin and work with that. What needs to be done ? Thanx

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92 Z28 L98 350
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Ported stock heads, XR270HR-10 cam, TES headers, Crane AFPR, Flowmaster catback, MSD ignition components.
Best ET 13.5@105 mph
"Take that auto, drop it in first, hold the brakes, stomp the gas and grin from ear to ear! :-)
Click here to see my car at Truspeed.org

Check out TruSpeed at http://www.truspeed.org
Check out the Bin Archive at http://www.truspeed.org/bins.html

Scott 87 IROC-Z

I am also interested in putting the 89 code in my 87 car. Can anyone answer this? Do you just put the 89 code on the 87 chip?


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87 IROC-Z 305 TPI gears, exhaust, converter
14.70 at 94.1 mph with 1.90 60'

TRAXION

Basically ... yes. Use the ARAP code and disconnect the Cold Start injector. The best thing to do would be to pull the CS injector entirely and use a CS injector plug kit. That way you eliminate another common vacuum leak, clean up the compartment, and make it easier to work on.

Tim

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TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's with bigger cam, bigger stall, and bigger exhaust.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

Scott 87 IROC-Z

Thank's Tim. That's what I was looking for.

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87 IROC-Z 305 TPI gears, exhaust, converter
14.70 at 94.1 mph with 1.90 60'

P J Moran

This looks like something I might consider doing, too. I printed out the parameter list from the TunerCat website and compared $32B to the $6E and found that they compare quite well except for "DFCO" and "Decel Enlean".

What is DFCO and how will Decel Enlean affect me? Also, what about the difference in baud rate mentioned above? Is that true? Does it matter?

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'87 IROC 5.7l TPI - original owner!

Scott 87 IROC-Z

I almost forgot about this post. Where can you get a CS injector plug kit, or do you just make one? I will be swaping a 383 Miniram in the spring and just thinking of all the other little stuff to do. Thanks.



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87 IROC-Z 305 TPI gears, exhaust, converter
14.70 at 94.1 mph with 1.90 60'

TRAXION

Scott....

Good question. Now, I am not a MAF guy but I thought that I remembered that you could get one from Arizona Speed & Marine.

Tim

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• Program your own PROMs!. Read my article to get started!
• Research and Experiment before asking questions.
• This is not a chip store. Go to the classifieds if you want someone to sell you a chip or give you a BIN.

TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's with bigger cam, bigger stall, and bigger exhaust.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

Scott 87 IROC-Z

Thanks again Tim.

Grumpy

DFCO
Deccleration Fuel Cut Off

One on those things you just have to play with.
On my turbo, everyone, with no exceptions uses it. Sept me, I use it to keep some EGT, and thus can spool up the turbo instantly from an overrun condition. Kinda a personal driving style thing. It's just for fuel economy. In car terms, it's like playing with the idle air bypass, and idle channel restrictor on a Q-Jet

Desert86Roc

Please clarify "The 89 .bin datastream is also 8192 baud instead of the crappy 160 baud in the 87" comment.

I thought the 160 baud computers were in the 85's ...not the 165's in the 86 on up computers?

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Mike Metzler (Desert86Roc)
Mike@SpeedworldMotorplex.com [*] Webmaster: SpeedWorldMotorplex.com[*] Click Here For My Racing Page[*]86 IROC 305 TPI (406 build in progress)
ET's @ 1250 ft[*] 14.28 @ 95.461 mph (uncorrected, NOS, no headers)[*] 15.365 @ 86.785 mph (uncorrected, Headers, no NOS)

[This message has been edited by Desert86Roc (edited February 21, 2001).]

TRAXION

Desert86Roc .... you are correct. The 85 was 160. '86 through '89 165 ECMs are 8192.

Tim

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TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's with bigger cam, bigger stall, and bigger exhaust.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

leirch

Tim/anybody that can help,
Could somebody send me a picture of the cold start injector or where it goes? I'm going to need a plug for it. I don't have a ton of experience with the TPI setup quite yet. I think the previous owner left the cold start opening unplugged!

Brendan

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1987 IROC-Z L98,SuperRam,EB 6085's,LPE 219/219 Roller, Crane 1.6RR, EB TPI Base, 58mm TB, ADS 24#, AFPR, K&N, EB TES, Catco Cat, 3" Borla Cat-Back, Accel cap,rotor,distro/other crap, MSD 6AL, MSD Blaster 3, Aluminum DS, 94 Disk Rear, Adjustable Valve, Precision 3.73 Gears, Sub-Frame Connectors, Hotchkis Lower Control Arms, KYB Shocks/Struts, Suspension Techniques Lowering Springs, Polyurethan Bushings all over the place, Moog Upper/Lower Ball joints and Tie Rods ends/Idler Arm,

To see the ROC, Check out the webpage Here

GregWestphal

iTrader: (1)

Brendan (leirch), you've got mail. BTW, if anyone needs a picture of the cold start injector, I have 2 pix, one of the injector and tubing by itself and the other showing it attached to the intake manifold.

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Greg Westphal
'87 IROC 305TPI/A4

IrocStan

My friend has a Edelbrock Hi-flow base that he bought for his 92 that I may buy from him for my 87. I Was wondering if my runners will bolt up to this manifold since my SLP runners have the hole for the cold start valve and I imagine that the Edelbrock manifold doesn't. Would this be a problem?

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87 IROC 350
Mods: 3:42 Torsen, pocket ported 083 heads, complete Edelbrock exhaust, Most free mods, Most little mods, aluminum d/s. Edelbrock STB, boxed rear suspension pieces, urethane bushings everywhere.
Stock cam, chip, runners, base, and trans
13.94@103mph, 2.25 60'
Recent stuff: SSM sfc's, Homemade relocation brackets, Ported SLP runners, ported base, EGR!
Current/future projects: homemade torque arm, and 27x10 Hoosiers (need wheels!), and Prom Burning
Planning new engine build, possibly 383 w/ TFS 23*

IrocStan

Ok, I answered my own question. There is one part number and it fits 85-92 engines.