1985 supercharged
Thread Starter
Intermediate
Joined: Jul 2011
Posts: 28
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From: Rochester New York
1985 supercharged
Thanks for welcoming me to your forum, I just bought at auction a 1985 that is supercharged with an accel computer 6 speed trans and borla exhaust, can I run this on pump gas with no issues? I have not even seen the car in person but price is good enough that I could not pass it up. I know it is built by a local vocational school and everything by the pics look brand new, it has been sold by the school to me and by the looks of the tires has not been driven since mods. Please send an e-mail and I can respond with pics so maybe get more info to help me out. I really like this car but still may have an interest in selling in the near future. Help is much appreciated
http://i1109.photobucket.com/albums/...8/corvette.jpg
http://i1109.photobucket.com/albums/.../corvette1.jpg
http://i1109.photobucket.com/albums/.../corvette2.jpg
Many of my questions have been answered on thread posted below
http://forums.corvetteforum.com/c4-t...ercharged.html
http://i1109.photobucket.com/albums/...8/corvette.jpg
http://i1109.photobucket.com/albums/.../corvette1.jpg
http://i1109.photobucket.com/albums/.../corvette2.jpg
Many of my questions have been answered on thread posted below
http://forums.corvetteforum.com/c4-t...ercharged.html
Thread Starter
Intermediate
Joined: Jul 2011
Posts: 28
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From: Rochester New York
I finally got it home, it has a accel DFI part number 77022, intercooled procharger supercharger. half of everything is not wired up so I may need some help. Pictures are coming.
Thread Starter
Intermediate
Joined: Jul 2011
Posts: 28
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From: Rochester New York
My pics
http://i1109.photobucket.com/albums/...orvette002.jpg
http://i1109.photobucket.com/albums/...orvette009.jpg
http://i1109.photobucket.com/albums/...orvette010.jpg
http://i1109.photobucket.com/albums/...orvette016.jpg
http://i1109.photobucket.com/albums/...orvette005.jpg
http://i1109.photobucket.com/albums/...orvette001.jpg
http://i1109.photobucket.com/albums/...orvette007.jpg
http://i1109.photobucket.com/albums/...orvette007.jpg
http://i1109.photobucket.com/albums/...orvette006.jpg
http://i1109.photobucket.com/albums/...orvette009.jpg
http://i1109.photobucket.com/albums/...orvette010.jpg
http://i1109.photobucket.com/albums/...orvette016.jpg
http://i1109.photobucket.com/albums/...orvette005.jpg
http://i1109.photobucket.com/albums/...orvette001.jpg
http://i1109.photobucket.com/albums/...orvette007.jpg
http://i1109.photobucket.com/albums/...orvette007.jpg
http://i1109.photobucket.com/albums/...orvette006.jpg
Thread Starter
Intermediate
Joined: Jul 2011
Posts: 28
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From: Rochester New York
I do not know much about these and although it appears to have been driven at one time it appears that some things are out of place, under the dash on the passenger side there are some wires hanging out, looks like from when the harness for the accel was hooked up. some power wires are just hanging around the battery area, all for the ignition and fuel control. when hooked up I can hear the pump start and when I turn it over it gets spark. not sure where the accel computer gets signal to power on from ignition, the only power wire I found goes to the battery. Please let me know if there are certain things I should check on the wiring for the injection. Also I took a picture of a aluminum part bolted to the fire wall to the right of the AC unit and I can't figure out what its for. All help would be appreciated and if anyone knows someone around the Rochester NY area that may know more about this car it would be great. From what I hear the previous owner ir a foot doctor and used the car to race at Watkins Glen.
Le Mans Master
Joined: Oct 1999
Posts: 6,366
Likes: 34
The aluminum thing is an FMU
it increases fuel pressure based on boost.
It looks like one of the bolts are missing from the superram lid. This will create a vacuum leak.
The amount of silicone sealant used on the lid.. I wonder if he lost the gasket, or sealed it up real good to keep the boost in. None the less... Sloppy mess. No big deal though.
Without prefect pics of the wires... we are all going to be clueless about what you need help with.
it increases fuel pressure based on boost.
It looks like one of the bolts are missing from the superram lid. This will create a vacuum leak.
The amount of silicone sealant used on the lid.. I wonder if he lost the gasket, or sealed it up real good to keep the boost in. None the less... Sloppy mess. No big deal though.
Without prefect pics of the wires... we are all going to be clueless about what you need help with.
Thread Starter
Intermediate
Joined: Jul 2011
Posts: 28
Likes: 0
From: Rochester New York
I will post better pics tomorrow
The aluminum thing is an FMU
it increases fuel pressure based on boost.
It looks like one of the bolts are missing from the superram lid. This will create a vacuum leak.
The amount of silicone sealant used on the lid.. I wonder if he lost the gasket, or sealed it up real good to keep the boost in. None the less... Sloppy mess. No big deal though.
Without prefect pics of the wires... we are all going to be clueless about what you need help with.
it increases fuel pressure based on boost.
It looks like one of the bolts are missing from the superram lid. This will create a vacuum leak.
The amount of silicone sealant used on the lid.. I wonder if he lost the gasket, or sealed it up real good to keep the boost in. None the less... Sloppy mess. No big deal though.
Without prefect pics of the wires... we are all going to be clueless about what you need help with.
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Thread Starter
Intermediate
Joined: Jul 2011
Posts: 28
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From: Rochester New York
OK, I ran the standard ram air 350 program on it, it fires but won't start. As you see by the pictures the intake is missing a few bolts. through those holes it is blowing fire out every once in a while like the timing is off. I told the program its 1200 cfm but Im not sure. tried adjusting time but nothing would make it any better. put engine at TDC and rotor is in position. Checked compression and its 120 psi on all cylinders. Any help would be great. Car has MSD ignition and gets great spark. Pulled plugs and they are all very wet like its flooding out also.
Thanks for all the good input.
Thanks for all the good input.
Thread Starter
Intermediate
Joined: Jul 2011
Posts: 28
Likes: 0
From: Rochester New York
Thread Starter
Intermediate
Joined: Jul 2011
Posts: 28
Likes: 0
From: Rochester New York
got it running
As it turns out the distributer is 180 out, I put in a standard superram intake program on my accel dfi with sequencial injection, seems to be starving for fuel when I hit the gas but it idles nice.
Instructor
Joined: May 2001
Posts: 186
Likes: 0
From: Midwest
The aluminum thing is an FMU
it increases fuel pressure based on boost.
It looks like one of the bolts are missing from the superram lid. This will create a vacuum leak.
The amount of silicone sealant used on the lid.. I wonder if he lost the gasket, or sealed it up real good to keep the boost in. None the less... Sloppy mess. No big deal though.
Without prefect pics of the wires... we are all going to be clueless about what you need help with.
it increases fuel pressure based on boost.
It looks like one of the bolts are missing from the superram lid. This will create a vacuum leak.
The amount of silicone sealant used on the lid.. I wonder if he lost the gasket, or sealed it up real good to keep the boost in. None the less... Sloppy mess. No big deal though.
Without prefect pics of the wires... we are all going to be clueless about what you need help with.
If you are starting from scratch and have to have it custom tuned, I would get rid of the FMU and upgrade your fuel injectors to a larger flow so you do not need one, then have it custom tuned. The Accel Gen 7, with proper injectors and tuning, is very adequate for the management of your boost system without an FMU. The Gen 7 usually has a few left over wires because there are several options that can be added, such as 3 stage nitrous control, service engine light, error reset button etc. Because I see that you have an HEI distributor you most likely do not have sequential fuel injection, requires a special distributor to replicate a cam position sensor, you should run in staggered batch mode without it. To set the timing you need to sync the distributor timing to your harmonic balancer timing mark with Accel's software with their timing proceedure and a PC with serial communications, you will need Accel's Calmap software version 3.2.
Thread Starter
Intermediate
Joined: Jul 2011
Posts: 28
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From: Rochester New York
I cant find version 3.2, can I run version 6 and use the same set up? It now will start but stalls the second I hit the gas.
If you are starting from scratch and have to have it custom tuned, I would get rid of the FMU and upgrade your fuel injectors to a larger flow so you do not need one, then have it custom tuned. The Accel Gen 7, with proper injectors and tuning, is very adequate for the management of your boost system without an FMU. The Gen 7 usually has a few left over wires because there are several options that can be added, such as 3 stage nitrous control, service engine light, error reset button etc. Because I see that you have an HEI distributor you most likely do not have sequential fuel injection, requires a special distributor to replicate a cam position sensor, you should run in staggered batch mode without it. To set the timing you need to sync the distributor timing to your harmonic balancer timing mark with Accel's software with their timing proceedure and a PC with serial communications, you will need Accel's Calmap software version 3.2.
Instructor
Joined: May 2001
Posts: 186
Likes: 0
From: Midwest
No, not only what you read from the ECM with V6 be corrupt, if you do a 'send' with it, the data that was once written to your ECM will now be corrupt. I'm not sure if you can do a save with V6 software on a V3 hardware ECM or not, I don't think you can hurt anything by trying and obviously this is the first thing you need to do, assuming that the data now in the ECM is useable. Forgot to mention, in order to use Accel's Calmap software, you need to acquire a "key" that plugs into the printer port of your PC.
Last edited by dynocar; Jul 10, 2011 at 05:36 PM.
Thread Starter
Intermediate
Joined: Jul 2011
Posts: 28
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From: Rochester New York
I have the key, and have downloaded software from v6 to my ECM already, the engine will start and idles fine but when I
try to hit the gas it stalls out. Can you send me V3 software?
try to hit the gas it stalls out. Can you send me V3 software?
No, not only what you read from the ECM with V6 be corrupt, if you do a 'send' with it, the data that was once written to your ECM will now be corrupt. I'm not sure if you can do a save with V6 software on a V3 hardware ECM or not, I don't think you can hurt anything by trying and obviously this is the first thing you need to do, assuming that the data now in the ECM is useable. Forgot to mention, in order to use Accel's Calmap software, you need to acquire a "key" that plugs into the printer port of your PC.
Thread Starter
Intermediate
Joined: Jul 2011
Posts: 28
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From: Rochester New York
OK Im actually using a USB adapter to run, now that I have V3 software on my computer I see what your talking about. it says I need a certain key, can you please let me kno0w the part number of the key that I need to use?
Thanks again for all the help.
Thanks again for all the help.
No, not only what you read from the ECM with V6 be corrupt, if you do a 'send' with it, the data that was once written to your ECM will now be corrupt. I'm not sure if you can do a save with V6 software on a V3 hardware ECM or not, I don't think you can hurt anything by trying and obviously this is the first thing you need to do, assuming that the data now in the ECM is useable. Forgot to mention, in order to use Accel's Calmap software, you need to acquire a "key" that plugs into the printer port of your PC.