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Registered
Join Date: Apr 2002
Location: Massachusetts
Posts: 45
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idle after ssi upgrade
Just got done with an SSI upgrade on my 81SC. I knew my engine would breath easier, but I did not expect my idle to jumped from 1000rpm to 1800rpm after the upgrade. Is this normal? I also removed the oxygen sensor, but I don't think it was working anyway. Just wanted get some feedback before I started adjusting things.
Revs quicker and sounds sweet!!!!!! 
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MAD4PORSCHE  81 911SC Targa |
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04-27-2003, 05:32 PM
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Senior Member
Join Date: Jun 2000
Location: N. Phoenix AZ USA
Posts: 28,969
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Sounds like you might have a vacuum leak that occured after the installation. Put the SSI's on my car and nothing changed but then I have the DME system on my car.
Joe
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2021 Subaru Legacy, 2002 Dodge Ram 2500 Cummins (the workhorse), 1992 Jaguar XJ S-3 V-12 VDP (one of only 100 examples made), 1969 Jaguar XJ (been in the family since new), 1985 911 Targa backdated to 1973 RS specs with a 3.6 shoehorned in the back, 1959 Austin Healey Sprite (former SCCA H-Prod), 1995 BMW R1100RSL, 1971 & '72 BMW R75/5 "Toaster," Ural Tourist w/sidecar, 1949 Aeronca Sedan / QB |
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04-27-2003, 07:14 PM
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Formerly bb80sc
Join Date: Aug 2001
Location: Hollywood Beach, CA
Posts: 4,361
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If I recall correctly, the O2 sensor will lean out the motor. So, in theory, with it removed, the motor would be running richer now, which could cause the increase in idle. Have you tried to either turn the idle adjustment screw, or adjust the mixture? Just a thought....
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Cheers -Brad 2015 Cayman GTS 2015 4Runner Limited |
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04-27-2003, 07:30 PM
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Registered
Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
Posts: 21,140
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Hey MAD... what size plug did you use on the SSI when you removed the sensor? .........Ron
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Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
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04-27-2003, 09:00 PM
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Senior Member
Join Date: Sep 2000
Location: planet earth
Posts: 2,256
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Don't have an O2 sensor on my SSI's but I know for a fact that a spark plug will screw right into the o2 bung on my old cat.
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78 Euro 911sc Targa 03 Hayden SCWDP |
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04-27-2003, 09:11 PM
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Registered
Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
Posts: 21,140
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Quote:
I got the SC SSI w/ the gasket protector because my heads are set up for it.........Ron
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Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
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04-27-2003, 09:18 PM
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Senior Member
Join Date: Sep 2000
Location: planet earth
Posts: 2,256
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No problem Ronin. Just went out to the garage to look to see what plug I used.
It is Autolite 45. Wanted to buy the cheapest thing I could to plug the hole and at <$1.00 it fit the bill. Anyone want to buy a good cat? $50 plus shipping
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78 Euro 911sc Targa 03 Hayden SCWDP |
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04-27-2003, 09:32 PM
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Registered
Join Date: Oct 2000
Location: agoura hills, ca 91301
Posts: 2,634
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How much would you think the shipping would be?
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04-28-2003, 08:40 AM
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