Ok, I have been nozing around here for a few weeks, and I am eventually going to get off my can and actually buy the stuff so I an start to do some porgramming.

My situation is this: I am currently running a reasonably modified .040 over 305. (You can see my mods in my sig) I am currently running a stock 1986 chip in this not so stock 87 Firebird. I know that there is a difference between the $32 & $32B, but since NO one wants to tell me what the difference is, I am going to ask a diffferent question.

My Question is this: Will a stock 350 chip from an 87 GTA or 88 GTA work better for me?, since I still have a 305, will this be a big problem with running ritch (outside of closed loop). Or should I go with a stock 87 305 Automatic trans chip and go from there because it is closer to my displacement.
The reason I ask is my cam specs are closer to the 350.

I want to use an 88 chip if I can because they had more horsepower. Since they both use $32B it should work..right???

Help

------------------
87 Formula 5.1 converted to TPI Yellow/Black
SLP Dur 206/212, Lift 480/487, Cent Line 112 cam, SLP headers, SLP cat-back exhaust
K&N Airfilter
Modified Stock cold air intake
Ported & polished Stock TPI intake
Holley Adjustable Fuel Press regulator
AC Rapidfire Spark Plugs.
Gil Younger (no yo-yo) Shift Kit
Aluminum Driveshaft
3.73 Posi gear
Baer 12" brakes 4 wheels
KYB AGX Adjustable Shocks & struts
Hotchkis strut tower brace
South side machine frame connectors
Custom reinforced control arms and pan hard bar.
Custom Leather interior
CUSTOM Yellow Gauge Faces

87 Formula TPI (5 Speed) Yellow/Gray STOCK

1967 Buick Riviera 430hp Turns high 14's (Not bad for 4300 lbs)

83 Camaro (Parts)
83 T/A (parts)

http://www.3rdgenformula.com

 

You should start with '89 6E code IMO. '89 305 automatic. APYM3493 is the one.

If you have a 5speed you want a 305 5speed bin.

 

Why go with the 89?, does it not eliminate the cold start injector?? which I have, no biggie, the other injectors would compensate.

What is the advantage of the 89 Chip over the 87-88 chips? Does it perform better? Will I get any trouble codes??

And with my mods, could I go with the 350 Chip? because it would be closer to my cam specs.

And Yes I HAVE an AUTOMATIC, so I cant go with the M5 chip.



[This message has been edited by okfoz (edited June 21, 2001).]

 

A "subject only" search for 6E will answer all your questions.

Start with the 305 bin. Cams specs are only part of the equation.

 

How is your cam more like a 350s? I know that in my 91 camero manual the 305 tpi and 350 tpi have the same cam.

 

How about the ARAP chip? You only need to change injector constants, fan control and possibly VATS to make it work.... And of course unplug the coldstart injector, since the '89 ARAP code does not need that.

Of course you have some tuning to do even after that, but just to get you started!


------------------
ZaphodB a.k.a Carl Andersson - zaphodb@faxancruisers.org
'89 Camaro IROC-Z 5.7L TPI - Mods under construction :-)
Custom ARAP Chip Under Development/180 t-stat, Edelbrock TES Headers,
SLP Airfoil, K&N Filters, Accel 8mm wires, Relocated MAT, AFPR @ 45 PSI

[This message has been edited by ZaphodB (edited June 24, 2001).]

 

Thanks, I appreciate the suggestion, I think that is where I will start. With the ARAP.

I did a subject only search on the ARAP and the only thread, that I found, with a link to get the ARAP, was broken, any other places.

John

------------------
87 Formula Yellow/Black
Engine & Transmission
.040 over 5.0 converted to TPI, 9.5:1 Compression, SLP Cam Dur 206/212, Lift 480/487, Cent Line 112, SLP headers, SLP cat-back exhaust, K&N Airfilter, Modified Stock cold air intake, Ported & polished Stock TPI intake, Holley Adjustable Fuel Press regulator, AC Rapidfire Spark Plugs.
Gil Younger (no yo-yo) Shift Kit, Aluminum Driveshaft, 3.73 Posi gear
Suspension & Brakes:
Baer 12" brakes 4 wheels, KYB AGX Adjustable Shocks & struts, Hotchkis strut tower brace, South side machine frame connectors, Custom reinforced control arms and pan hard bar.
Interior:
Custom Leather interior, CUSTOM Yellow Gauge Faces, Kenwood Receiver, Pioneer Speakers, Kicker Substations, Kenwood 10 Disk Changer, Pioneer Amp.

87 Formula TPI (5 Speed) Yellow/Gray STOCK

1967 Buick Riviera 430hp Turns high 14's (Not bad for 4300 lbs)

83 Camaro (Parts)
83 T/A (parts)

http://www.3rdgenformula.com

 

You could try this one:

http://www.area51.org.il/~zaphodb/gmecm/



------------------
ZaphodB a.k.a Carl Andersson - zaphodb@faxancruisers.org
'89 Camaro IROC-Z 5.7L TPI - Mods under construction :-)
Custom ARAP Chip Under Development/180 t-stat, Edelbrock TES Headers,
SLP Airfoil, K&N Filters, Accel 8mm wires, Relocated MAT, AFPR @ 45 PSI

 

Yes, you correct, partially. The 350 TPI & the 305 TPI with the M5 transmission DID have the same cam, The 305 with an A4 Trans used the same cam as the TBI (LO3) engine. The biggest difference between the 305 TBI & the TPI were the heads, other than the induction system of course.

lets not get off PROM topic.

 

Hey ZAPHODB,
Is that a ARAP 305 BIN without the VATS that I see? Who did the programing?

THANK YOU for the link

 

I have an 89 Auto bin file that was for a 305...if I had it to do all over again, I'd have saved my 35 bucks and gone with a known 350 bin and worked from there.

ARAP is a 350 bin.

Huh...looking at your sig, our cars are almost identical...

And for your reference...maybe no one knows what the difference between the 32 and 32B code is...


GregF
87 IROC
http://www.geocities.com/gsfranks/irocz.html

 

Greg,
Thanks, I was wondering if anyone did know what the diff was between 86 & 87-88 BINs. I went to Tunercat's web site & he had NOTHING diffferent between the two. Which, in reality is puzzling, why have seemingly identical PROMS but have differnt decoders.

If you don't mind me asking, what do you run in the 1/4 & Trap speed.

Thanks

John

new sig:

------------------
87 Formula Yellow/Black
Engine & Transmission
.040 over 5.0 converted to TPI, 9.5:1 Compression, SLP Cam Dur 206/212, Lift 480/487, Cent Line 112, SLP headers, SLP cat-back exhaust, K&N Airfilter, Modified Stock cold air intake, Ported & polished Stock TPI intake, Holley Adjustable Fuel Press regulator, AC Rapidfire Spark Plugs.
Gil Younger (no yo-yo) Shift Kit, Aluminum Driveshaft, 3.73 Posi gear
Suspension & Brakes:
Baer 12" brakes 4 wheels, KYB AGX Adjustable Shocks & struts, Hotchkis strut tower brace, South side machine frame connectors, Custom reinforced control arms and pan hard bar.
Interior:
Custom Leather interior, CUSTOM Yellow Gauge Faces, Kenwood Receiver, Pioneer Speakers, Kicker Substations, Kenwood 10 Disk Changer, Pioneer Amp.

87 Formula TPI (5 Speed) Yellow/Gray STOCK

1967 Buick Riviera 430hp Turns high 14's (Not bad for 4300 lbs)

83 Camaro (Parts)
83 T/A (parts)

http://www.3rdgenformula.com

[This message has been edited by okfoz (edited June 26, 2001).]

 

I did, there was really not much to it, the only modifications from the stock ARAP is the injector flow rate, VATS flag and FAN N/O (Normally Open) Flag.

You'll probably want to change some more things, but this I believe is a good starting point, because the car will run - And I haven't changed anything critical in it.

------------------
ZaphodB a.k.a Carl Andersson - zaphodb@faxancruisers.org
'89 Camaro IROC-Z 5.7L TPI - Mods under construction :-)
Custom ARAP Chip Under Development/180 t-stat, Edelbrock TES Headers,
SLP Airfoil, K&N Filters, Accel 8mm wires, Relocated MAT, AFPR @ 45 PSI

 

ZaphodB,
I basically used the chip as-is and it works wonderfully. The onlly thing I played with was the Fan temp setting. I lowered it to around 100°C on & 97°C Off. This past weekend, I went to St. Ignace for a car show, its about 230 miles from where I live and I got a solid 23.5 MPG, (Consider I dont think we ever were going slower than 70-75 MPH.

Thanks again, I think it is a great start. I chose NOT to change the Spark timing variables for 2 reasons, 1) high 3.73:1 gear, & 2) I have a slightly hotter cam than stock. It does seem to run great though, thanks...