How does one unclog catalytic converters most easily? - Page 3

crazypete · 01-24-2003, 09:38 PM

I think I'm all set with the lead, in that case, I sniff enough fumes as it is pulling heat off the top of the headers to heat the cabin

Whoa, having the airpump firing into the back of the heads changes the exhaust tone! It sounds like a constant growl. I might be mistaken, but it seems to be quicker on the uptake now...

ChunkFunky · 01-27-2003, 08:01 AM

They sell lead additive for OLD cars... anything before about 1970 in it's ORIGINAL form would be designed to run leaded gas... you can convert most engines to run on UNLEADED but using hardened valve seats and stuff.. but it you wanna "keep it real" you'd need that additive... now, weather it's actulay LEAD or a synthetic that ACTS like lead, I dunno.. it's basicaly there as a lubricant for engine components...

as for the exhaust grumble and poping... that's normal liek the other posts said... generaly its caused by oxygen getting into the exhaust system and re-igniting your exhaust...it's more previlant if you have bad exhaust leaks... if you are nice and sealed up you'll still get it cause of your air pump I guess.. though I kinda like that sound... but that's just me
-as

mpj76 · 01-27-2003, 08:36 AM

They sell (or use to sell) the 110 octane leaded stuff here at speedway (orlando, FL). They will only let you dispense into a container. A few times I mixed it with 93 octane (about 50/50) and cranked my timing to about 16 degrees. In cold weather it makes a very noticable difference. Never took it to the track this way.

crazypete · 01-27-2003, 01:56 PM

Well, funny thing is I tried setting the timing to 16 degrees, but the car just wont stay at 16 degrees!

I would set the distributor to 16 degrees with my light, tighten the hold down clamp, recheck and it would be at 16. I would drive it around, come back, check it and it would be back at 10. I set it again, reclamped, drove around and when I looked, it was back at 10!

The car is possessed!

I never knew these mechanical distributors were so stubborn.

I've always run 87 and never had any pinging at all no matter how hard I pushed it.

mpj76 · 01-27-2003, 02:30 PM

Did you remember to remove the SPOUT connector before setting base timing? If you don't, your changes won't hold. I have mine set at 14 degrees. If I put anything lower than 92 in my car, it pings. Removing the SPOUT severs the computer link during timing changes. Most cars running 93 octane can be bumped up to 14 degrees before they start to ping.

Nixon1 · 01-27-2003, 04:40 PM

Think I can get away with 12-13 degrees of timing running 89 octane?

crazypete · 01-27-2003, 10:44 PM

Before I had this possessed distributor and I actually had a computer, I would run between 14 and 16 degrees using 87 octane and never had any problems. I guess I dont beat on it hard enough to get good detonation going

Nixon1 · 01-28-2003, 05:01 PM

4-6 degrees advanced over stock on crap gas? You must be either deaf or very very lucky!!

01-28-2003, 05:28 PM

Quote:

Originally posted by Nixon1
Think I can get away with 12-13 degrees of timing running 89 octane?

If you advance the timing at all...you'd be stupid not to run at least 91 or higher octane.

Nixon1 · 01-28-2003, 07:34 PM

Gotta check my timing..don't know what it's set at but it's hard to start the thing, it misses when I punch the gas, and it's getting 89 octane.

crazypete · 01-28-2003, 08:59 PM

Like I said, I dont beat on it much.

The most I put the pedal in is 2/3 of the way in and that is if I'm really jettin around. I just casually let it spin up through the gears and this is usually enough to beat the "yo homey g" volkswagen jettas that prowl the streets around umass.

Nixon1 · 01-28-2003, 10:49 PM

It was funny..I had some 45 year old lady try me at a stoplight...my friend was with me and I looked at him as we were accelerating and I notice she was hanging right next to me and said "is she trying me???" and he was like "Yeah dude, her front end keeps getting up higher and higher"...so I'm at about half to 3/4 pedal and I think she's near or at wide open throttle and even with me until the car shifts into 3rd gear and pulls 2 car lengths out of nowhere in like 2 seconds...it was the funniest thing I swear...I just looked at him and said '.....what the hell was that....??'

Mach 1 · 01-28-2003, 11:31 PM

Quote:

Originally posted by Simi Stang
If you advance the timing at all...you'd be stupid not to run at least 91 or higher octane.

Not neccesarily. I used to run 14 - 17 degrees base advance with 87 octane and no problems at all.

It can be done. Depends on the particular engine combo and individual engine characteristics.

01-24-2003, 09:38 PM	#41
crazypete Registered Member Join Date: Sep 2002 Location: Boston Posts: 592	I think I'm all set with the lead, in that case, I sniff enough fumes as it is pulling heat off the top of the headers to heat the cabin Whoa, having the airpump firing into the back of the heads changes the exhaust tone! It sounds like a constant growl. I might be mistaken, but it seems to be quicker on the uptake now... __________________ 91 GT Carb conversion, holley 600 double pumper, edelbrock performer intake, FMS "C" drop springs, march 1000 underdrive pullies, crane 1.7 roller rockers, GT-40P headers, bassani x pipe, american thunder catback, FMS 4.56's, msd aL6, trunkmount battery, A/C eliminator kit, 3000 stall tci streetfighter, AOD with transgo kit, A+ servo, 300M hardened lockup shaft, kevlar bands and 28,000 gvw trans cooler, 3 core radiator, 300 lbs stripped with a full interior

01-27-2003, 08:01 AM	#42
ChunkFunky Registered Member Join Date: Apr 2002 Location: Tustin, CA Posts: 465	They sell lead additive for OLD cars... anything before about 1970 in it's ORIGINAL form would be designed to run leaded gas... you can convert most engines to run on UNLEADED but using hardened valve seats and stuff.. but it you wanna "keep it real" you'd need that additive... now, weather it's actulay LEAD or a synthetic that ACTS like lead, I dunno.. it's basicaly there as a lubricant for engine components... as for the exhaust grumble and poping... that's normal liek the other posts said... generaly its caused by oxygen getting into the exhaust system and re-igniting your exhaust...it's more previlant if you have bad exhaust leaks... if you are nice and sealed up you'll still get it cause of your air pump I guess.. though I kinda like that sound... but that's just me -as __________________ '89 GT Convertible: TFS TW Heads, TFS Street Intake, TFS Stage 1 Cam, FMS 1.6 RRs, 24# Injectors, Pro-M 75mm MAF, No Name CAI, 3.73s, O/R H-Pipe, FlowMasters, AOD w/ Trans-Go Shift Kit

01-27-2003, 01:56 PM	#44
crazypete Registered Member Join Date: Sep 2002 Location: Boston Posts: 592	Well, funny thing is I tried setting the timing to 16 degrees, but the car just wont stay at 16 degrees! I would set the distributor to 16 degrees with my light, tighten the hold down clamp, recheck and it would be at 16. I would drive it around, come back, check it and it would be back at 10. I set it again, reclamped, drove around and when I looked, it was back at 10! The car is possessed! I never knew these mechanical distributors were so stubborn. I've always run 87 and never had any pinging at all no matter how hard I pushed it. __________________ 91 GT Carb conversion, holley 600 double pumper, edelbrock performer intake, FMS "C" drop springs, march 1000 underdrive pullies, crane 1.7 roller rockers, GT-40P headers, bassani x pipe, american thunder catback, FMS 4.56's, msd aL6, trunkmount battery, A/C eliminator kit, 3000 stall tci streetfighter, AOD with transgo kit, A+ servo, 300M hardened lockup shaft, kevlar bands and 28,000 gvw trans cooler, 3 core radiator, 300 lbs stripped with a full interior

01-27-2003, 04:40 PM	#46
Nixon1 Registered Member Join Date: Jan 2003 Location: Palm Bay, FL Posts: 432	Think I can get away with 12-13 degrees of timing running 89 octane? __________________ '91 Mustang GT 5.0 AOD Daily Driver Current stats: NEW 302 short block, E-303 cam (@.050, 220/220, .498/.498, 110 degrees), 1.6 roller rockers, Performer RPM heads (aluminum, 1.9/1.6, 60cc chambers), Cobra intake, Granatelli 75mm MAF, Billet AFPR, Equal-Length Shorty Headers, Off-Road X Pipe, Flowmasters, 4.10 POSI 13.73 at 103.8, ~2.2 60'

01-27-2003, 10:44 PM	#47
crazypete Registered Member Join Date: Sep 2002 Location: Boston Posts: 592	Before I had this possessed distributor and I actually had a computer, I would run between 14 and 16 degrees using 87 octane and never had any problems. I guess I dont beat on it hard enough to get good detonation going __________________ 91 GT Carb conversion, holley 600 double pumper, edelbrock performer intake, FMS "C" drop springs, march 1000 underdrive pullies, crane 1.7 roller rockers, GT-40P headers, bassani x pipe, american thunder catback, FMS 4.56's, msd aL6, trunkmount battery, A/C eliminator kit, 3000 stall tci streetfighter, AOD with transgo kit, A+ servo, 300M hardened lockup shaft, kevlar bands and 28,000 gvw trans cooler, 3 core radiator, 300 lbs stripped with a full interior

01-27-2003, 08:36 AM	#43
mpj76 Registered Member Join Date: Sep 2002 Posts: 158	They sell (or use to sell) the 110 octane leaded stuff here at speedway (orlando, FL). They will only let you dispense into a container. A few times I mixed it with 93 octane (about 50/50) and cranked my timing to about 16 degrees. In cold weather it makes a very noticable difference. Never took it to the track this way.

01-27-2003, 02:30 PM	#45
mpj76 Registered Member Join Date: Sep 2002 Posts: 158	Did you remember to remove the SPOUT connector before setting base timing? If you don't, your changes won't hold. I have mine set at 14 degrees. If I put anything lower than 92 in my car, it pings. Removing the SPOUT severs the computer link during timing changes. Most cars running 93 octane can be bumped up to 14 degrees before they start to ping.

01-28-2003, 05:01 PM	#48
Nixon1 Registered Member Join Date: Jan 2003 Location: Palm Bay, FL Posts: 432	4-6 degrees advanced over stock on crap gas? You must be either deaf or very very lucky!! __________________ '91 Mustang GT 5.0 AOD Daily Driver Current stats: NEW 302 short block, E-303 cam (@.050, 220/220, .498/.498, 110 degrees), 1.6 roller rockers, Performer RPM heads (aluminum, 1.9/1.6, 60cc chambers), Cobra intake, Granatelli 75mm MAF, Billet AFPR, Equal-Length Shorty Headers, Off-Road X Pipe, Flowmasters, 4.10 POSI 13.73 at 103.8, ~2.2 60'

01-28-2003, 07:34 PM	#50
Nixon1 Registered Member Join Date: Jan 2003 Location: Palm Bay, FL Posts: 432	Gotta check my timing..don't know what it's set at but it's hard to start the thing, it misses when I punch the gas, and it's getting 89 octane. __________________ '91 Mustang GT 5.0 AOD Daily Driver Current stats: NEW 302 short block, E-303 cam (@.050, 220/220, .498/.498, 110 degrees), 1.6 roller rockers, Performer RPM heads (aluminum, 1.9/1.6, 60cc chambers), Cobra intake, Granatelli 75mm MAF, Billet AFPR, Equal-Length Shorty Headers, Off-Road X Pipe, Flowmasters, 4.10 POSI 13.73 at 103.8, ~2.2 60'

01-28-2003, 08:59 PM	#51
crazypete Registered Member Join Date: Sep 2002 Location: Boston Posts: 592	Like I said, I dont beat on it much. The most I put the pedal in is 2/3 of the way in and that is if I'm really jettin around. I just casually let it spin up through the gears and this is usually enough to beat the "yo homey g" volkswagen jettas that prowl the streets around umass. __________________ 91 GT Carb conversion, holley 600 double pumper, edelbrock performer intake, FMS "C" drop springs, march 1000 underdrive pullies, crane 1.7 roller rockers, GT-40P headers, bassani x pipe, american thunder catback, FMS 4.56's, msd aL6, trunkmount battery, A/C eliminator kit, 3000 stall tci streetfighter, AOD with transgo kit, A+ servo, 300M hardened lockup shaft, kevlar bands and 28,000 gvw trans cooler, 3 core radiator, 300 lbs stripped with a full interior

01-28-2003, 10:49 PM	#52
Nixon1 Registered Member Join Date: Jan 2003 Location: Palm Bay, FL Posts: 432	It was funny..I had some 45 year old lady try me at a stoplight...my friend was with me and I looked at him as we were accelerating and I notice she was hanging right next to me and said "is she trying me???" and he was like "Yeah dude, her front end keeps getting up higher and higher"...so I'm at about half to 3/4 pedal and I think she's near or at wide open throttle and even with me until the car shifts into 3rd gear and pulls 2 car lengths out of nowhere in like 2 seconds...it was the funniest thing I swear...I just looked at him and said '.....what the hell was that....??' __________________ '91 Mustang GT 5.0 AOD Daily Driver Current stats: NEW 302 short block, E-303 cam (@.050, 220/220, .498/.498, 110 degrees), 1.6 roller rockers, Performer RPM heads (aluminum, 1.9/1.6, 60cc chambers), Cobra intake, Granatelli 75mm MAF, Billet AFPR, Equal-Length Shorty Headers, Off-Road X Pipe, Flowmasters, 4.10 POSI 13.73 at 103.8, ~2.2 60'

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