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#626258 - 11/29/08 01:14 AM Re: Removing the Monte Carlo SS computer [Re: rob65]  
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ken87aero Offline
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Bay Area, CA
Hey guys, figured i'd let all of you know what i found out the other day. You may already knwo this but-

I was talking to a smog ref (in cali) about getting my car to pass smog, and he mentioned to me i should just go to a TPI setup, and get rid of teh comp. carb/distributor and computer system cuz i was having problems.. i thought this was illegal but He said-
As long as you have a smog ref. inspect the new system and have him sign it off (and give you a little sticker for your door panel) its ok. It will now just be smogged as "that car". but the new system has to be same year or newer than your car.

please lemme know if something about this is not true.
thanks.


87 ss aero coupe. rebiult bored out gen1 350, vortec heads, "zz4" style rollers, performer cam, rebiult 200-4r + shift kit. "it's got a little giddy-up to it"
#629441 - 12/11/08 05:30 PM Re: Removing the Monte Carlo SS computer [Re: 06mcss]  
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1stCarMonteSS Offline
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1stCarMonteSS  Offline
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Posts: 49
Marlboro Massachusetts
This is really imformative thanks everyone


88 SS. Got a 383 coming soon. No rear tires. Looks like a lion and it pulls like a fire ant!
#637802 - 01/13/09 01:54 AM Re: Removing the Monte Carlo SS computer [Re: 06mcss]  
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Urawsomejac Offline
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Urawsomejac  Offline
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Yardley, PA
why do people remove the computer?

#637817 - 01/13/09 02:40 AM Re: Removing the Monte Carlo SS computer [Re: Urawsomejac]  
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Gruvin Offline
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Gruvin  Offline
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Texas
Originally Posted By: Urawsomejac
why do people remove the computer?
good question... most common listed reason is something is not running right with the computer controlled carb system. I personally believe that keeping the stock computer controlled carb system intact and running is the best way to go for any monte that sees lots of street action. It is more than capable of running on a mild 454 with a little retuning.


My first SS! Sold Jan 2004
[Linked Image]
87 SS bought 9-5-04: Sold 6-18-2010 - project 87 finds a new home with another undisclosed MonteCarloSS.com member!
#637820 - 01/13/09 02:44 AM Re: Removing the Monte Carlo SS computer [Re: Gruvin]  
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85_SS Offline
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85_SS  Offline
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Ontario, Canada
Most people simply want to clean up the engine bay, prefer the old school way of doing things, and/or don't understand how the system works and think it hinders performance. IMHO, it's a great/simple system that is quite versatile, offers mileage about equal to TPI, helps diagnose problems through trouble codes, and best of all is free smile


[Linked Image]
1985 Chevrolet Monte Carlo SS
5.7 LITRE / TES Headers / SShaker Hood / WC T-5 5-Speed
1970 Pontiac GTO
Orbit Orange Judge Re-creation / YZ RAIII 400 / M21 4-Speed
#646391 - 02/07/09 02:45 PM Re: Removing the Monte Carlo SS computer [Re: 85_SS]  
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jarid Offline
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calgary, alberta
wow wow wow, I need more info! on the computer there is two plugs , one has 90% of its wires running into the engine bay, (i asume this is the engine harnes)it also has two wires running into the other harness. What are they for and what do i do with them, ----The other harness splits in half , 50% gos under the dash and 50 % go,s out the gromet. In the expanation it says replace gromet is that around that 50% split. my car is an 87 and its waiting till i can get answers


87ss 85ss 87ls all blended together to make 1 ss . 450hp 383ci , tci200r4 , 8.5"w/3.42 , all the suspension goodies. 13"baer brakes , nexxus guages, custom GSI int.no paint yet
#648347 - 02/12/09 10:09 PM Re: Removing the Monte Carlo SS computer [Re: jarid]  
Joined: Oct 2008
Posts: 571
AndreB Offline
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AndreB  Offline
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Posts: 571
Milwaukee, Wi
so how hard is it to install the tci lockup kit. i jes got mines today from summit.
Its not alot of parts, just some electrical wires and some aluminum valve looking thingy.





85SS 350v8, 200-4r, bodywork and H4 upgrade coming soon
dreday1062000@yahoo.com
#651459 - 02/21/09 12:27 PM Re: Removing the Monte Carlo SS computer [Re: AndreB]  
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bronk57 Offline
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custer wisconsin
Very informative post, thanks to all who posted!

#651686 - 02/22/09 01:29 AM Re: Removing the Monte Carlo SS computer [Re: bronk57]  
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gg Offline
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gg  Offline
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gadsden alabama
i have a stupid question someone explain, pull the cc carb,and the cc distrib.put on a holley or edelbrock and a hei vac dist. leave the computer hooked up and you dont loose anything like trans lock-up and whatever else you loose when remove computer,i was just wondering,anybody done this???will it work and run ok?

#651845 - 02/22/09 04:43 PM Re: Removing the Monte Carlo SS computer [Re: gg]  
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85_SS Offline
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85_SS  Offline
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Ontario, Canada
No - the CCC system is all or nothing. It will run fine, but the lockup won't work and the CCC system will be doing nothing. You will get nothing by an orange light shining in your face if you leave the ECM in place with a yanked CCC carb/distrib.


[Linked Image]
1985 Chevrolet Monte Carlo SS
5.7 LITRE / TES Headers / SShaker Hood / WC T-5 5-Speed
1970 Pontiac GTO
Orbit Orange Judge Re-creation / YZ RAIII 400 / M21 4-Speed
#652535 - 02/24/09 02:30 AM Re: Removing the Monte Carlo SS computer [Re: 85_SS]  
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Posts: 33
gg Offline
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gg  Offline
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gadsden alabama
ok i just put a edelbrock carb on and left everything hooked up but the wires to carb "of course" ,this car runs better than it ever has, so you can leave everything hooked up but the carb.wires i plugged the map vac line up, and thats all, advance to dist. and trans ,and everthing else working perfect. pulled orange ck engine bulb, i am well pleased, thanks for all the input.

Last edited by gg; 02/24/09 02:31 AM.
#652726 - 02/24/09 06:47 PM Re: Removing the Monte Carlo SS computer [Re: gg]  
Joined: Feb 2009
Posts: 13
stallion Offline
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stallion  Offline
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Posts: 13
New Bavaria Ohio
I have an 87 ss and the person who had it before me put a 350 out of a 93 caprice. The caprice was tbi and they converted back to carburated. They pretty much just swapped the intake and carb over. It ran ok the way they had it set up. I just currently rebuilt the quadrajet and i had it running. Now its not wanting to start now. Will the computer know the difference from the 305-350? should i eliminate the computer with this set up ???

#665128 - 03/28/09 08:45 PM Re: Removing the Monte Carlo SS computer [Re: 85_SS]  
Joined: Jan 2009
Posts: 83
Trevor Johnson Offline
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Trevor Johnson  Offline
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Posts: 83
Roanoke, Texas
Originally Posted By: 85_SS
No - the CCC system is all or nothing. It will run fine, but the lockup won't work and the CCC system will be doing nothing. You will get nothing by an orange light shining in your face if you leave the ECM in place with a yanked CCC carb/distrib.


That is exaclty true! The previous owner had a holley carb on my SS with everything else stock. The torque Converter wouldn't lock up it was eating gas throwing codes. Wouldn't pass emissions and ran like crap. I have now figured it out and will be putting a stock rebuilt carb back on there and getting this thing back to normal. I think that the Computer is a great tool and should definally be left in. I have to pass emissions and you can't pass with out the computer. If I ever upgrade the motor in the car I will leave the Computer still in there and have a tune wrote for it. But now I am going to be leaving it stock and restoring it.

#675170 - 04/22/09 12:47 AM Re: Removing the Monte Carlo SS computer [Re: Trevor Johnson]  
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Posts: 41
grvyrd Offline
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grvyrd  Offline
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Posts: 41
Stillwater, ok
need/want some input on the ss ccc system.
first off i am building an sbc 406 for my monte,emulating the impersonator buildup in chp a few years ago.
my specs are as follows;
200-4r trans,stock stall,less than 500 miles on a rebuild.
3.73 gears in rear;stock
edelbrock TES headers;
stock exhaust from the cat. convertor back
(that will change one day , (but first things first)
400 SBC- bored .030 over for an actual c.id. of 406
stock crank;3.75 stroke
5.7 rods
KB 168 pistons,22cc dished
64cc stock vortec heads
9.5 -9.8:1 C.R
lunati hydraulic flat tappet cam,290/290
i want to keep the stock carb/computer setup if possible, what steps should i take to do this?
the carb rebuilt/ adjusted i know ,but what about a reflashed chip?
i have also heard to replace the stock knock sensor w/ one from/for an 454?
any input out there?

#677349 - 04/27/09 04:13 AM Re: Removing the Monte Carlo SS computer [Re: grvyrd]  
Joined: Jan 2009
Posts: 12
ccrise85 Offline
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ccrise85  Offline
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Posts: 12
Greesburg Pa
I have ripped everything to do with the computer off of my car in the engine bay and replaced carb with 600 manual choke edelbrock and vacumn advance dist. everything is fine. disabled check engine light. only thing is i can not remember if i have had it in high with it locked up yet due to the fact that i have not had it on the road yet but occasionly take it for a spin


1985 Monte Carlo SS 305 200R-4 tranny eldelbrock 600 cfm maual choke all emissions stuff ripped off. HEI with vacumm advance....needs lots of love
interior is not bad though
#677956 - 04/28/09 09:10 PM Re: Removing the Monte Carlo SS computer [Re: ccrise85]  
Joined: Apr 2009
Posts: 33
chevy85monteSS Offline
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chevy85monteSS  Offline
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Joined: Apr 2009
Posts: 33
Sioux City, Iowa
I too would like to know at what point you need to get into having the chip reprogrammed, I have seen jetting changes mentioned for the carb and found some good info on that (see below) but the purpose of reprogramming the chip is for timing- correct? Is there much benefit from going with a hotter coil (I.E. ACCELL or MALLORY performance coils) or an ignition box (MSD or something similar) or is the chip the place to start??

Carb tuning info...

found this info on another board, this may be common knowledge for some of you but may help the other newbies like myself

info on tuning & modding the CCC for performance...
http://www.thirdgen.org/quadrajet

this page may be useful after reading the above link...
http://www.thirdgen.org/rods


1985 Monte SS (basket case) 406 SBC coming soon!
#677960 - 04/28/09 09:28 PM Re: Removing the Monte Carlo SS computer [Re: chevy85monteSS]  
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Gruvin Offline
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Gruvin  Offline
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Texas
John(and Dustin), you want the engine to idle at less than 750RPMs in gear. The chip is timing and there are a few other little things like an idle table that will throw a code if the engine is idling at higher RPMs than the table allows. I have been told by the guy that made my chip to make sure that my engine would idle at less than 750RPMs and 700 is better. I am running a Comp Cams XR270 roller in my 350 and it idles slightly above stock.

Biggest needs for a new chip are: adjust timing curve, remove EGR, change table to allow for a bigger cam. You will do much more to the carb itself to run the larger engine than you need to do to the chip.


My first SS! Sold Jan 2004
[Linked Image]
87 SS bought 9-5-04: Sold 6-18-2010 - project 87 finds a new home with another undisclosed MonteCarloSS.com member!
#677963 - 04/28/09 09:38 PM Re: Removing the Monte Carlo SS computer [Re: Gruvin]  
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chevy85monteSS Offline
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chevy85monteSS  Offline
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Sioux City, Iowa
So as long as there are no codes, don't worry about the chip? Or is there a performance gain to be had by reprogramming when modifications are made?


1985 Monte SS (basket case) 406 SBC coming soon!
#677964 - 04/28/09 09:45 PM Re: Removing the Monte Carlo SS computer [Re: chevy85monteSS]  
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Gruvin Offline
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Gruvin  Offline
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Texas
As long as there are no codes and the engine runs strong with the stock timing curve then you don't need a chip change. The timing curve is the advantage in a new chip.


My first SS! Sold Jan 2004
[Linked Image]
87 SS bought 9-5-04: Sold 6-18-2010 - project 87 finds a new home with another undisclosed MonteCarloSS.com member!
#677970 - 04/28/09 09:56 PM Re: Removing the Monte Carlo SS computer [Re: Gruvin]  
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chevy85monteSS Offline
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chevy85monteSS  Offline
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Sioux City, Iowa
Thanks, that's good to know- what do you think about using an MSD box or "performance coil". Do these help with the CCC?


1985 Monte SS (basket case) 406 SBC coming soon!
#689953 - 06/03/09 05:31 PM Re: Removing the Monte Carlo SS computer [Re: chevy85monteSS]  
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pacheco Offline
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pacheco  Offline
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Spring Hill,Fl
i had a msd box and performance coil with no problems


Bust your asx during the week..bust your knuckles on the weekend
350 with vortec heads,Edelbrock intake,headers with 2.5"exhaust,SS sway bars,SS rims,spoiler,3:73 wit a POWERTRAX,tubular rear control arms,JEG'S trany,GBODY front brace,umi rear chassis brace.
http://www.cardomain.com/ride/3193776
#701885 - 07/09/09 08:43 PM Re: Removing the Monte Carlo SS computer [Re: pacheco]  
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Purple87SS Offline
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Purple87SS  Offline
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South Jersey
I removed the quadra jet and distributor and put in a vacum lock-up kit for the trans. I hate how soon the kit locks up engages. I've tweaked it a few times to engage later, but it seems to lock and lock the TC at part throttle. Prob gonna wire a switch to lock it manualy when I want.


84 SS- Needs some parts!
87 Buick Regal Turbo T WE4-1 of 1547
#708850 - 07/31/09 02:21 AM Re: Removing the Monte Carlo SS computer [Re: Purple87SS]  
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Xracer44 Offline
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Xracer44  Offline
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Sioux Falls, South Dakota
I need help!!!

I have an 87 Monte Carlo SS with a older 350 in it. I'm removing the quadrajunk carb and hei and computer system. I'm going to put a Holley 670 Street Avenger and the old sytle MSD street fire HEI.

I'm in the process of removing the computer wire harness but I have a couple questions. I'v also read all the info in the post.

1. I unplugged the the connector that goes into the water neck on the intake. Is that the water temp wire for the guage? Do I have to run a new wire from the guage?

2. When I took the new sytle hei out there was 1 connector left over that was still there. Is that my tack wire and hot wire? When I put the new hei in I need a hot wire and tack wire or do I need to run new wires?

3. My tranny has "Metric" stamped on the pan. Is that the metric 200(200-r4)?

Ant help would be great.

Thanks

#713707 - 08/14/09 01:14 AM Re: Removing the Monte Carlo SS computer [Re: Xracer44]  
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supernova455 Offline
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supernova455  Offline
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tampa, fl usa
I know there are reasons for removing the computer, but I just can't seem to understand them, I don't know if it is because I am a slow learner and have to read things over many time to grasp them, or it's out of my comprehension. I just wish the title to this subject read "Retaining the Monte Carlo SS computer", and listed the appropriate content to match.

Supernova455

#720905 - 09/06/09 12:03 AM Re: Removing the Monte Carlo SS computer [Re: grvyrd]  
Joined: Jun 2009
Posts: 194
Partsguy19 Offline
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Partsguy19  Offline
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Posts: 194
Kernersville, NC
Originally Posted By: grvyrd
need/want some input on the ss ccc system.
first off i am building an sbc 406 for my monte,emulating the impersonator buildup in chp a few years ago.
my specs are as follows;
200-4r trans,stock stall,less than 500 miles on a rebuild.
3.73 gears in rear;stock
edelbrock TES headers;
stock exhaust from the cat. convertor back
(that will change one day , (but first things first)
400 SBC- bored .030 over for an actual c.id. of 406
stock crank;3.75 stroke
5.7 rods
KB 168 pistons,22cc dished
64cc stock vortec heads
9.5 -9.8:1 C.R
lunati hydraulic flat tappet cam,290/290
i want to keep the stock carb/computer setup if possible, what steps should i take to do this?
the carb rebuilt/ adjusted i know ,but what about a reflashed chip?
i have also heard to replace the stock knock sensor w/ one from/for an 454?
any input out there?


I'll be doing this soon.. How did it work out for you. PM me..


Work in progress!!!! 406, Flat Tops, 5.7 rods, 650 Double, 70cc heads, Summit 1105 Cam, Intake, 3:73, TH400, No-Hop bars, Headers and exhaust.. etc..
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