Go Back   LS1TECH > SBC-BBC-LT1-LT4 PERFORMANCE > LT1-LT4 Modifications
Sign in using an external account
Register Forgot Password?
Register iTraderTimeslips Photos Members Search Today's Posts Mark Forums Read Used CarsVendor Directory
Search

LT1-LT4 Modifications
1993-97 Gen II Small Block V8

Welcome to LS1Tech.com!
Welcome to LS1Tech.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join LS1Tech.com today!


Reply
 
Thread Tools Search this Thread
Old 04-09-2010, 12:37 AM   #1
Staging Lane
Garage is empty, add now
 
Trader Rating: 1
Join Date: Nov 2008
Location: Lynchburg, VA
Posts: 65
Default isopropy (rubbing) alcohol and the emissions test...

I have to run my car through the emissions lane this weekend and do a sniffer style emissions test. I have herd if you run your gas tank low, but two of the bigger bottles of the 91% isopropy alcohol in your tank, run it hard for a few mins that you will have a greater chance of passing. Now im not as concerned about if this will work, im worried about putting all of this in my fuel system... can I damage anything doing this? and has anyone ever done this before? did it work?

Also, I have herd of people using denatured allchol for this and i have herd a similar effect can be obtained by using HEET, but thats a much more expensive way, isopropy alcohol is a lot cheaper.

thoughts?

Something like this...
http://www.thirdgen.org/techboard/ex...emissions.html
__________________
94 Z28 6-speed, SPEC 2 clutch, ZR-1 wheels, magnaflow exhaust, K&N intake, Trick Flow Intake Elbow, SLP Air Foil, Motive 3.73 gears, Oil leak, 13.71 @ 104.41 mph

-Aaron-
94Zstangwalker is offline   Reply With Quote
Old 04-09-2010, 01:14 AM   #2
TECH Addict
Garage is empty, add now
 
jaycenk's Avatar
 
Trader Rating: 1
Join Date: Jun 2009
Location: Holiday, FL
Posts: 2,160
Default

It burns hotter and burns more of the fuel mixture. If you have cats it heats the cats up so hot that they work with no problem but if you don't have cats I don't see it helping much. not to sure about that.
jaycenk is offline   Reply With Quote
Old 04-09-2010, 01:26 AM   #3
TECH Resident
Garage is empty, add now
 
Bowtie Boy's Avatar
 
Trader Rating: 0
Join Date: Dec 2005
Location: In a house
Posts: 856
Default

Why are you worried about not passing emissions?
__________________
Some kind of vehicles with some kind of mods making some kind of power.
Bowtie Boy is offline   Reply With Quote
Old 04-09-2010, 06:18 AM   #4
Launching!
Garage is empty, add now
 
gixxer75094lt1's Avatar
 
Trader Rating: 8
Join Date: Sep 2005
Location: CHITOWNRACING
Posts: 237
Default

Quote:
Originally Posted by Bowtie Boy View Post
Why are you worried about not passing emissions?
lol.. u serious?? ummm then he cant like umm drive his car and umm they will suspend his plates or license depending which state he lives in. i think thats a good reason to be worried... thankk god illinois doesnt do 95 and pre cars anymore my car sat for awhile during those times lol.
gixxer75094lt1 is offline   Reply With Quote
Old 04-09-2010, 06:28 AM   #5
TECH Apprentice
1993 Pontiac Firebird
My Garage
 
Trader Rating: 1
Join Date: Feb 2009
Location: PSL, FL
Posts: 398
Default

My concern with alcohol, especially straight like that, in the fuel system is not so much how it burns as what it breaks loose and get clogged up in injectors and filters and such. If the car is older and has never had the entire fuel system gone through or cleaned before, the alcohol can break down any varnish or built up fuel sludge that has sort of solidified or accumulated over the years. In itself that's a good thing as it would be cleaning the fuel system. The problem is it tends to gum up or get stuck in filters, injectors, etc. if there was a lot of varnish to break down.
__________________
1993 Trans-Am, A4, 3.73 gears, MSD wires, Electric Water pump, Long Tubes, Magnaflow, K&N, 285 rwhp...still working out the issues...
creepingdeath94 is offline   Reply With Quote
Old 04-09-2010, 11:58 AM   #6
TECH Senior Member
Garage is empty, add now
 
RamAir95TA's Avatar
 
Trader Rating: 2
Join Date: May 2005
Location: South Jersey
Posts: 9,482
Send a message via AIM to RamAir95TA
Default

I don't see why your car WOULDN'T pass. You've got intake and exhaust...did you delete your emissions components (EVAP, AIR, EGR)?
__________________
95 T/A AI 200cc stock castings, 383, Performabuilt 4L60E, Ford 9", Tuned by PCMforless 3340#,
10.81 @ 124.16, 1.43 60' Video of 10-second pass 455whp, 445tq - Dyno Vid

LT1 PARTS For Sale, MSD Opti, steam crossover tube, BMR swaybar, MAF, etc.
RamAir95TA is offline   Reply With Quote
Old 04-09-2010, 12:31 PM   #7
TECH Resident
Garage is empty, add now
 
Bowtie Boy's Avatar
 
Trader Rating: 0
Join Date: Dec 2005
Location: In a house
Posts: 856
Default

Quote:
Originally Posted by gixxer75094lt1 View Post
lol.. u serious?? ummm then he cant like umm drive his car and umm they will suspend his plates or license depending which state he lives in. i think thats a good reason to be worried... thankk god illinois doesnt do 95 and pre cars anymore my car sat for awhile during those times lol.
Yeah but I dont see a reason why he would fail.
__________________
Some kind of vehicles with some kind of mods making some kind of power.
Bowtie Boy is offline   Reply With Quote
Old 04-09-2010, 12:40 PM   #8
Staging Lane
Garage is empty, add now
 
Trader Rating: 1
Join Date: Nov 2008
Location: Lynchburg, VA
Posts: 65
Default

Quote:
Originally Posted by Bowtie Boy View Post
Yeah but I dont see a reason why he would fail.
Last time I tested I put out almost 3X the legal limit... I DO have a cat and working EGR...

If the car is not tested by the 24th ( I have gotten all of the extensions the state will give me) they are going to pull the registration on the vehicle.
__________________
94 Z28 6-speed, SPEC 2 clutch, ZR-1 wheels, magnaflow exhaust, K&N intake, Trick Flow Intake Elbow, SLP Air Foil, Motive 3.73 gears, Oil leak, 13.71 @ 104.41 mph

-Aaron-
94Zstangwalker is offline   Reply With Quote
Old 04-09-2010, 08:09 PM   #9
TECH Apprentice
1993 Pontiac Firebird
My Garage
 
Trader Rating: 1
Join Date: Feb 2009
Location: PSL, FL
Posts: 398
Default

If you have access to a good dyno tuner, you could always down tune the hell out of it so it runs like crap but passes emissions and then go back it get it tuned back properly after you pass? Just a shot in the dark though...used to work with the older air cooled Porsches and Motronic/Motec/etc.
__________________
1993 Trans-Am, A4, 3.73 gears, MSD wires, Electric Water pump, Long Tubes, Magnaflow, K&N, 285 rwhp...still working out the issues...
creepingdeath94 is offline   Reply With Quote
Old 04-09-2010, 08:14 PM   #10
TECH Fanatic
Garage is empty, add now
 
Trader Rating: 5
Join Date: May 2009
Posts: 1,129
Default

Get a few cans of Seafoam and put one in a full tank of gas and pour the other thru the tb with the engine running then let the car sit for 15 minutes and restart and rev the engine and watch it smoke all the carbon and gunk out.
97Z28SS is offline   Reply With Quote
Old 04-09-2010, 09:27 PM   #11
LS1TECH Sponsor
2010 Chevrolet Camaro
My Garage
 
Lonnies Performance's Avatar
 
Trader Rating: 16
Join Date: Feb 2007
Location: Pittsburgh, PA
Posts: 2,577
Default

remember with 90% mixtures of iso alcohol, the other 10% mixture is usually water. Do not put this stuff in your car.
__________________
Lonnie Pavtis - Lonnies Performance Automotive
http://www.lonniesperformance.com
Providing High Performance Products & Services since 1999

Specializing in custom fuel systems, fuel injection components, suspension & your supercharging needs.
(724) 322-8505 9:00am-11:00pm (eastern time)weekdays & weekends.

www.lonniesperformance.com/logo3.jpg
Lonnies Performance is offline   Reply With Quote
Old 04-09-2010, 09:44 PM   #12
TECH Resident
Garage is empty, add now
 
Bowtie Boy's Avatar
 
Trader Rating: 0
Join Date: Dec 2005
Location: In a house
Posts: 856
Default

How about that guaranteed to pass stuff?
__________________
Some kind of vehicles with some kind of mods making some kind of power.
Bowtie Boy is offline   Reply With Quote
Old 04-09-2010, 10:47 PM   #13
TECH Senior Member
Garage is empty, add now
 
RamAir95TA's Avatar
 
Trader Rating: 2
Join Date: May 2005
Location: South Jersey
Posts: 9,482
Send a message via AIM to RamAir95TA
Default

Quote:
Originally Posted by 94Zstangwalker View Post
Last time I tested I put out almost 3X the legal limit... I DO have a cat and working EGR...

If the car is not tested by the 24th ( I have gotten all of the extensions the state will give me) they are going to pull the registration on the vehicle.
3x the legal limit of what? That will help.
__________________
95 T/A AI 200cc stock castings, 383, Performabuilt 4L60E, Ford 9", Tuned by PCMforless 3340#,
10.81 @ 124.16, 1.43 60' Video of 10-second pass 455whp, 445tq - Dyno Vid

LT1 PARTS For Sale, MSD Opti, steam crossover tube, BMR swaybar, MAF, etc.
RamAir95TA is offline   Reply With Quote
Old 04-10-2010, 12:05 AM   #14
TECH Addict
Garage is empty, add now
 
jaycenk's Avatar
 
Trader Rating: 1
Join Date: Jun 2009
Location: Holiday, FL
Posts: 2,160
Default

The cat is the key. All the other **** really wont make a damn bit of difference beside the visual to make sure it's there. The cat may need to be replaced thats what cleans up the amount of hydrocarbons seen on the test.
Did you have a tune done?
jaycenk is offline   Reply With Quote
Old 04-10-2010, 09:28 AM   #15
TECH Regular
Garage is empty, add now
 
Trader Rating: 0
Join Date: Jan 2007
Posts: 484
Default

just find a couple of guys that you know have cars that get passed but you know are not legal. see if you know them though other people that they trust and find out who inspects them and get them to call the inspector. when we had the sniffer test i would have the probe in the tail pipe of a honda. i had to have had the cleanest running lt1 in the country by that test
__________________
Pistons for sale
http://www.ls1tech.com/forums/parts-...l#post15183065
jasonisdn is offline   Reply With Quote
Old 04-10-2010, 11:50 AM   #16
TECH Junkie
Garage is empty, add now
 
Puck's Avatar
 
Trader Rating: 13
Join Date: Oct 2006
Posts: 3,421
Default

Instead of trying questionable tricks and gimmicks, you should find out why it is failing so bad in the first place.

Your combo with cats and EGR should pass with flying colors. Datalog it to check for any clues. Did you do the exhaust yourself? Your cat may be a gutted or bypassed piece from the previous owner.
__________________
93 Medium Patriot Red Z28(Drags): Craig Gallant ported AFR headed LE Solid Roller 383. My Porch Ornament.
95 Bright Red TA(Turns):Full suspension($4k worth!), Eibach Prokit, 6LE Seats, BBK Mids, Chrome Z06s, 275 Nittos, Fresh Built Trans w/FTI 3200($3k worth!), OEM WS6 Hood+airbox, etc...For Sale 5k!!
2012 Metallic Spark Black ZX-14R Ninja: 148mph trap first time out, stock w/ONLY slipons. (New lowered times soon)
*RIP Sikora, You will be missed!*
Puck is offline   Reply With Quote
Old 04-10-2010, 11:50 AM
LS1Tech
Pontiac Firebird




Paid Advertisement
Reply

Tags
alcohol, car, cleaning, emissions, gas, isopropyl, kn, pass, put, rubbing, run, tank, test, testing, virginia


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off



All times are GMT -5. The time now is 01:00 AM.


Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.5.2
Advertising - Terms of Service - Privacy Statement - JOBS
Emails & Contact Details