carb swap question 84 auto
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Joined: May 2006
Posts: 97
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From: Panama City Florida
carb swap question 84 auto
I gotta 84 vette with the 700r I`m putting a carb on it ditching the missfire injection. Question is what do you think I gotta do for the trans to still work right? not worried about speedo just the shifting and converter lock up. Any ideas will be helpfull. Thanx
Safety Car
Joined: Dec 2002
Posts: 3,655
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From: Charleston SC
Do a search this has all been covered before. But for the 84 I believe all you have to do for the Trany is leave the ECM in place and it will control the lock up with out any feed back from the fuel injection. I did not know this when I swapped my 84 and I used a lock up kit from bow tie overdrive, $70. The 84 is the only ECM that will control the converter if the fuel injection is removed. As far as the Speedo and gauges, none of them use the ECM, other then the MPG. The temp, Oil, and Speedo are all feed directly from the sensor to the gauge.
Race Director
Joined: Feb 2004
Posts: 12,518
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It is very easy to do a 1 wire, 4th gear only lock up. It will not rely on the ecm at all. Street rod guys love it. Cheap, simply and nice drivability. Address this immediately before putting the car back on the road. No lock up will kill an 84 700 quickly.
New brackets are required to restore the tv geometry on the carb.
New brackets are required to restore the tv geometry on the carb.
Race Director
Joined: Dec 2000
Posts: 17,551
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From: El Paso Texas
Originally Posted by Pete K
700's have no provision of any kind for vacuum connections
Correct.
And why are you losing the crossfire? Just adding a carb isn't going to gain you much, if any performance. The crossfire can be made to run very nicely with some simple mods, and still retain fuel economy, low emissions, and driveability of an efi system CFI-EFI runs in the 13's with his.
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Safety Car
Joined: Dec 2002
Posts: 3,655
Likes: 24
From: Charleston SC
Originally Posted by Pete K
It is very easy to do a 1 wire, 4th gear only lock up. It will not rely on the ecm at all. Street rod guys love it. Cheap, simply and nice drivability. Address this immediately before putting the car back on the road. No lock up will kill an 84 700 quickly.
New brackets are required to restore the tv geometry on the carb.
New brackets are required to restore the tv geometry on the carb.
The one wire toggle SW works great and is a good idea even if just for a back up but On the 84 The ECM will lock up the converter with pin 19, converter lock up on the ECM, It uses pin 22, Fourth Gear discrete to activate it and both signals are from the trany and the reason it will work w/o the FI system. I thought the same thing and that is why I ordered the $70 kit From BowTie over drive. Patrick informed me after the fact that he did nothing other then leave the ECM in place and his converter locked up just fine after his carb conversion. If you need more info I think he still hangs out on Digital corvette quite a bit. As far as the TV geometry goes I
made my own but BowTie sells a kit, called TVmade EZ http://www.tvmadeez.com/
Last edited by FD2BLK; Jul 28, 2006 at 09:50 PM.
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
Originally Posted by FD2BLK
Pete,
The one wire toggle SW works great and is a good idea even if just for a back up but On the 84 The ECM will lock up the converter with pin 19, converter lock up on the ECM, It uses pin 22, Fourth Gear discrete to activate it and both signals are from the trany and the reason it will work w/o the FI system. I thought the same thing and that is why I ordered the $70 kit From BowTie over drive. Patrick informed me after the fact that he did nothing other then leave the ECM in place and his converter locked up just fine after his carb conversion. If you need more info I think he still hangs out on Digital corvette quite a bit. As far as the TV geometry goes I
made my own but BowTie sells a kit, called TVmade EZ http://www.tvmadeez.com/
The one wire toggle SW works great and is a good idea even if just for a back up but On the 84 The ECM will lock up the converter with pin 19, converter lock up on the ECM, It uses pin 22, Fourth Gear discrete to activate it and both signals are from the trany and the reason it will work w/o the FI system. I thought the same thing and that is why I ordered the $70 kit From BowTie over drive. Patrick informed me after the fact that he did nothing other then leave the ECM in place and his converter locked up just fine after his carb conversion. If you need more info I think he still hangs out on Digital corvette quite a bit. As far as the TV geometry goes I
made my own but BowTie sells a kit, called TVmade EZ http://www.tvmadeez.com/
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
Jegs and Sumit carries the carb linkage for the throttle and the TV cable at the carb.
I chose Jegs only 39.00 and I forget how much for the trans portion.
You will need the Holley carb and trans pieces for the throttle cable and trans .I got mine from NAPA.
Make sure when you set up the TV cable ,you can play a tune on the cable,otherwise you will burn up the 3-4 in a couple of miles.
Everything on my car works but the milage thing.
Oil temp may be a pain to hook up depending on what block you are using.
Just take pictures before you remove all the sensor Items.
I chose Jegs only 39.00 and I forget how much for the trans portion.
You will need the Holley carb and trans pieces for the throttle cable and trans .I got mine from NAPA.
Make sure when you set up the TV cable ,you can play a tune on the cable,otherwise you will burn up the 3-4 in a couple of miles.
Everything on my car works but the milage thing.
Oil temp may be a pain to hook up depending on what block you are using.
Just take pictures before you remove all the sensor Items.
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
You need the d44 bat wing and carrier.You can drill the c-beam and
some have been known to run the old drive shaft or cut it.
I would recomend you buy the c-beam drive shaft,that fits and be done with it.
some have been known to run the old drive shaft or cut it.
I would recomend you buy the c-beam drive shaft,that fits and be done with it.
Pro
Joined: Apr 2004
Posts: 533
Likes: 0
From: Akron Pa
Do a search for Rich & Lisa.
Rich has done this conversion to an 84 and is VERY helpful in talking you through some of the "other little things" that are often over looked.
If you dont find him here, he hangs out over at domesticmisfits.net a lot!
Rich has done this conversion to an 84 and is VERY helpful in talking you through some of the "other little things" that are often over looked.
If you dont find him here, he hangs out over at domesticmisfits.net a lot!
Burning Brakes
Joined: Jan 2005
Posts: 1,217
Likes: 0
From: Augusta GA
Originally Posted by padrummer1
Do a search for Rich & Lisa.
Rich has done this conversion to an 84 and is VERY helpful in talking you through some of the "other little things" that are often over looked.
If you dont find him here, he hangs out over at domesticmisfits.net a lot!
Rich has done this conversion to an 84 and is VERY helpful in talking you through some of the "other little things" that are often over looked.
If you dont find him here, he hangs out over at domesticmisfits.net a lot!
