305tbi to 350 card..just a few ?'s
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Junior Member
Joined: Jan 2006
Posts: 6
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From: Wyoming
Car: 95 Chevy 1/2ton, 91 Geo metro, 89 Camaro
Engine: truck and race car have 350's, geo has a 1.0L
Transmission: truck is 5spd, race car is auto, geo is 5 spd
305tbi to 350 card..just a few ?'s
Ok, I have a 1989 camaro RS. The 305 tbi is getting pretty weak and I just got done building a 420hp 350. I want to put it in the camaro. I want to get rid of the tbi and egr systems. The 350 has a carb on it. Some one was telling me that the speedometer is controlled by the computer system and will not work when I do the conversion. I was just wondering what you guys do. Is there a harness I have to buy cause I want to get ride of the computer and all.
thanks,
Justin
thanks,
Justin
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Joined: Jun 2000
Posts: 350
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From: Madison, WI USA
Car: '89 Camaro Convertible
Engine: LB9 Heads/LT1 Cam Holley 670 Carb
Transmission: T5 Manual
Axle/Gears: 3.73
My 89 Camaro (Formerly LO3 TBI) has a gear driven speedometer not at all controlled by the combuter. Here is what it looks like after the switch to carb:
Lance
Lance
Last edited by Max; Feb 3, 2006 at 11:26 PM.
Joined: Mar 2000
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
hilliusracing31, welcome aboard.
The VSS is separate from the ECM. Those cars with a transmission-mounted VSS have a module that is not dependant upon an operational ECM.
The VSS is separate from the ECM. Those cars with a transmission-mounted VSS have a module that is not dependant upon an operational ECM.
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From: Hickory, NC
Car: 1991 Camaro RS, 1993 Camaro Z-28
Engine: what engine, LT1
Transmission: did it come with one, 4l60
Axle/Gears: They spin (most of the time)
i did a swap on mine, never even thought about it, but yea it works fine, other than its off a little because of the 3:73's
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From: murphy,n.c
Car: 88iroc
Engine: 355 blueprint engine
Transmission: raptor built 700r4
Axle/Gears: 373
speedometer
i have a 88 iroc and i guess you answered my questions with the speedo but i have 29 inches in the back plus i will be putting in 342s in the rear so i have no choice but to get a programable speedo right?autometer is the only one i could find since i need a three and five eighths hole.
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: speedometer
i have a 88 iroc and i guess you answered my questions with the speedo but i have 29 inches in the back plus i will be putting in 342s in the rear so i have no choice but to get a programable speedo right?autometer is the only one i could find since i need a three and five eighths hole.
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Joined: Dec 2003
Posts: 192
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From: Va
Car: 92 camaro
Engine: 355
Transmission: 700r4
Re: 305tbi to 350 card..just a few ?'s
Your going to have to find out if your car has A speed buffer box that is seprate or if its built into the ecm. If it built into the ecm you going to have to get a speed buffer.
http://www.hioutput.com/tech/speedo.html
http://www.hioutput.com/tech/speedo.html
Last edited by Toxinz; May 9, 2007 at 08:02 PM.
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