Elimination of CSV.
Thread Starter
Instructor
Joined: May 1999
Posts: 116
Likes: 0
From: Sandnes Norway
Elimination of CSV.
I'm going to eliminate the cold start valve om my 86. Is it possible to use the code from a 89 (no csv) without any (major) modifications ? The car is otherwise mostly stock.. Both is MAF and both is 165 ECU so it should work I think... If this will not work, what tabels would I have to modify to compensate for no csv ?
Instructor
Joined: Jul 2001
Posts: 130
Likes: 0
From: Torrance CA
Re: Elimination of CSV. (Roar Hansen)
Just unplug the 9th injector.
And make sure you change the "Crank Fuel Pulse Width Multiplier vs. Ref Pulses (1-16)" table or you will have extended cranking.
I changed 1-8 from 0.000 to 0.500 and it fires right up.
And make sure you change the "Crank Fuel Pulse Width Multiplier vs. Ref Pulses (1-16)" table or you will have extended cranking.
I changed 1-8 from 0.000 to 0.500 and it fires right up.
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: Elimination of CSV. (Kevin 88)
Just unplug the 9th injector.
And make sure you change the "Crank Fuel Pulse Width Multiplier vs. Ref Pulses (1-16)" table or you will have extended cranking.
I changed 1-8 from 0.000 to 0.500 and it fires right up.
And make sure you change the "Crank Fuel Pulse Width Multiplier vs. Ref Pulses (1-16)" table or you will have extended cranking.
I changed 1-8 from 0.000 to 0.500 and it fires right up.
00 : 0.996
08 : 0.996
16 : 0.996
.
.
.
128 : 0.996
....do you feel this might be why my first start of the day normally takes about 4-5 seconds of cranking? After that 1st start it fires right up without hesitation. My chip is based off of a 1988 BIN and I have deleted my cold start injector because of the Accel intake manifold.
Thread Starter
Instructor
Joined: May 1999
Posts: 116
Likes: 0
From: Sandnes Norway
Re: Elimination of CSV. (scorp508)
Scorp: Good question! I checked my stock bin and all values are just like yours (all values are 0.996).. (AANM)
Kevin 88: What year is your car (what bin) ? Was 0.000 the values from a stock bin ?
I dont have the TDF-file for the ARAP.bin so I colud not check the values in it. Anybody know the values in this tabel in the ARAP-bin ?
Thanks everyone for helping to figure this out !
Kevin 88: What year is your car (what bin) ? Was 0.000 the values from a stock bin ?
I dont have the TDF-file for the ARAP.bin so I colud not check the values in it. Anybody know the values in this tabel in the ARAP-bin ?
Thanks everyone for helping to figure this out !
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Taken from... http://www.jimsperformance.com/portinj.html
and.....
and....
I'd like to know if this was simply modification of some values I can alter for my now CSV-less system, or additional code.
[Modified by scorp508, 2:56 PM 7/23/2002]
In 1989 the cold start injector was deleted from the system. The primary injectors were used for cold starts via a fuel enrichment program in the newer EPROM calibrators.
When the starter is engaged and the coolant temperature is less than 100 deg F. The cold start injector provides a spray of fuel, of 8 seconds duration max, to each cylinder via a air distribution system built into the intake manifold. If the engine temperature is greater than 100 deg F, the cold start injector is disabled by the cold start switch.
In 1989 the cold start injector was deleted. The calibrator provides a wider pulse width on startup to provide a richer mixture for a cold engine.
I'd like to know if this was simply modification of some values I can alter for my now CSV-less system, or additional code.
[Modified by scorp508, 2:56 PM 7/23/2002]
Thread Starter
Instructor
Joined: May 1999
Posts: 116
Likes: 0
From: Sandnes Norway
Re: Elimination of CSV. (Hendej)
I assume you have aluminum heads. ARAP/APYP has agressive SA curves, probably way too much for 86E iron heads.
Oh well, I'le have to buy the tdf-file to read the ARAP-bin anyhow if I should do this..
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Pro
Joined: Jun 2000
Posts: 686
Likes: 0
From: Crystal Lake, IL USA
Re: Elimination of CSV. (Roar Hansen)
I pulled the ARAP advance curve out using WinBin. I should have said that ARAP is RUMORED to have a steeper curve. It is actually milder than what came with my '86E. Here are the values at WOT (LV = 208) along with my stock values:
RPM ARAP '86e
4800 35.2 32.3
4400 30.9 30.6
4000 27.1 29.9
3600 23.9 29.9
3200 22.9 29.9
2800 22.9 29.9
2400 25.0 28.5
2200 27.1 27.4
2000 26.0 26.4
BTW, I get 5-6 degrees of knock retard at 3000 - 3500 RPM with my stock chip. By shaving off a degree at a time I'm down to 1 degree retard and I'm still way more agressive than ARAP.
RPM ARAP '86e
4800 35.2 32.3
4400 30.9 30.6
4000 27.1 29.9
3600 23.9 29.9
3200 22.9 29.9
2800 22.9 29.9
2400 25.0 28.5
2200 27.1 27.4
2000 26.0 26.4
BTW, I get 5-6 degrees of knock retard at 3000 - 3500 RPM with my stock chip. By shaving off a degree at a time I'm down to 1 degree retard and I'm still way more agressive than ARAP.
