considering CFI to TPI
Thread Starter
Heel & Toe
Joined: Jan 2012
Posts: 16
Likes: 0
considering CFI to TPI
after spending the past few days (literally) reading for hours and hours. I think i've decided on converting my crossfire '84 to TPI. Most of the parts I can get for next to nothing. (my buddy changed his trans am to carb, i'd be getting his stock stuff).
My understanding is that I use the TPI intake manifold, throttle body, all sensors, find a TPI ecu and wire harness? Am I missing anything. I know the power increase wont be huge, but I'm looking for a better "base" to start from. Possible future boost plans.
Also, I've been throwing the idea of converting to a carb but I really dont like the idea of going backwards technology wise. I'm very open to opinions.
Any incite would be appreciated, thanks
My understanding is that I use the TPI intake manifold, throttle body, all sensors, find a TPI ecu and wire harness? Am I missing anything. I know the power increase wont be huge, but I'm looking for a better "base" to start from. Possible future boost plans.
Also, I've been throwing the idea of converting to a carb but I really dont like the idea of going backwards technology wise. I'm very open to opinions.
Any incite would be appreciated, thanks
Last edited by blackc4xfire; Jan 23, 2012 at 11:17 PM.
Melting Slicks
Joined: Jan 2005
Posts: 2,658
Likes: 4
From: Clifton Park NY
after spending the past few days (literally) reading for hours and hours. I think i've decided on converting my crossfire '84 to TPI. Most of the parts I can get for next to nothing. (my buddy changed his trans am to carb, i'd be getting his stock stuff).
My understanding is that I use the TPI intake manifold, throttle body, all sensors, find a TPI ecu and wire harness? Am I missing anything. I know the power increase wont be huge, but I'm looking for a better "base" to start from. Possible future boost plans.
Also, I've been throwing the idea of converting to a carb but I really dont like the idea of going backwards technology wise. I'm very open to opinions.
Any incite would be appreciated, thanks
My understanding is that I use the TPI intake manifold, throttle body, all sensors, find a TPI ecu and wire harness? Am I missing anything. I know the power increase wont be huge, but I'm looking for a better "base" to start from. Possible future boost plans.
Also, I've been throwing the idea of converting to a carb but I really dont like the idea of going backwards technology wise. I'm very open to opinions.
Any incite would be appreciated, thanks
Now if you want to do something thats worthwhile and inexpensive to do it such as a hsr,superam or miniram lets talk.
Melting Slicks
Joined: Jan 2005
Posts: 2,658
Likes: 4
From: Clifton Park NY
Took me a few min's to find this. You will definetly want to read this thread. It will save you hours of changing your harness out. This thread is mine ....CFI to HSR
http://forums.corvetteforum.com/c4-t...fi-to-hsr.html
http://forums.corvetteforum.com/c4-t...fi-to-hsr.html
Thread Starter
Heel & Toe
Joined: Jan 2012
Posts: 16
Likes: 0
Took me a few min's to find this. You will definetly want to read this thread. It will save you hours of changing your harness out. This thread is mine ....CFI to HSR
http://forums.corvetteforum.com/c4-t...fi-to-hsr.html
http://forums.corvetteforum.com/c4-t...fi-to-hsr.html
Melting Slicks
Joined: Jan 2005
Posts: 2,658
Likes: 4
From: Clifton Park NY
My HSR is full height since I have a scoop.
Now... the key to your conversion is the ECM. By using EBL/Flash/Ham/Multiport upgrade it will allow you to plug in to your existing ecm location. Then relocate 1 wire at the ecm plug location. Go to the engine bay spend about 20 min's make a few minor changes and your done. No need to run any new wires,harness, tear out and reinstall. You'd be using your existing harness to do this. You will also now have the ability to completely tune your car with a laptop. No prom burning...its a flash system. The best thing is it won't looked all hacked up.
The only things you want off his setup is the TB,sensors,Injectors. You will want his injectors plugs and IAC plug. Thats it.
Now put on any intake you want. Find a used HSR,Miniram,or Superam.
Search me at youtube.. slrvette ...tons of videos of driving the car
Gains...well on my stock bottom 350 it has a lot of spirit, but I also was camed,geared and had dual exhaust. Best mod you'll ever do is the ecm change...
Now... the key to your conversion is the ECM. By using EBL/Flash/Ham/Multiport upgrade it will allow you to plug in to your existing ecm location. Then relocate 1 wire at the ecm plug location. Go to the engine bay spend about 20 min's make a few minor changes and your done. No need to run any new wires,harness, tear out and reinstall. You'd be using your existing harness to do this. You will also now have the ability to completely tune your car with a laptop. No prom burning...its a flash system. The best thing is it won't looked all hacked up.
The only things you want off his setup is the TB,sensors,Injectors. You will want his injectors plugs and IAC plug. Thats it.
Now put on any intake you want. Find a used HSR,Miniram,or Superam.
Search me at youtube.. slrvette ...tons of videos of driving the car
Gains...well on my stock bottom 350 it has a lot of spirit, but I also was camed,geared and had dual exhaust. Best mod you'll ever do is the ecm change...
Last edited by qws; Jan 24, 2012 at 11:18 AM.
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Melting Slicks
Joined: Sep 2010
Posts: 2,422
Likes: 202
QWS... my HSR is full height to... and we will both have A huge gain. over the cut and welded vette version
but other onlookers. will have sticker shock. when they see the vette specific HSR
but other onlookers. will have sticker shock. when they see the vette specific HSR
Last edited by THE 383 admiral; Jan 25, 2012 at 09:15 PM.
Melting Slicks
Joined: Jan 2005
Posts: 2,658
Likes: 4
From: Clifton Park NY
Race Director
Joined: Apr 2003
Posts: 17,700
Likes: 1,667
From: moraga ca
My HSR is full height since I have a scoop.
Now... the key to your conversion is the ECM. By using EBL/Flash/Ham/Multiport upgrade it will allow you to plug in to your existing ecm location. Then relocate 1 wire at the ecm plug location. Go to the engine bay spend about 20 min's make a few minor changes and your done. No need to run any new wires,harness, tear out and reinstall. You'd be using your existing harness to do this. You will also now have the ability to completely tune your car with a laptop. No prom burning...its a flash system. The best thing is it won't looked all hacked up.
The only things you want off his setup is the TB,sensors,Injectors. You will want his injectors plugs and IAC plug. Thats it.
Now put on any intake you want. Find a used HSR,Miniram,or Superam.
Search me at youtube.. slrvette ...tons of videos of driving the car
Gains...well on my stock bottom 350 it has a lot of spirit, but I also was camed,geared and had dual exhaust. Best mod you'll ever do is the ecm change...
Now... the key to your conversion is the ECM. By using EBL/Flash/Ham/Multiport upgrade it will allow you to plug in to your existing ecm location. Then relocate 1 wire at the ecm plug location. Go to the engine bay spend about 20 min's make a few minor changes and your done. No need to run any new wires,harness, tear out and reinstall. You'd be using your existing harness to do this. You will also now have the ability to completely tune your car with a laptop. No prom burning...its a flash system. The best thing is it won't looked all hacked up.
The only things you want off his setup is the TB,sensors,Injectors. You will want his injectors plugs and IAC plug. Thats it.
Now put on any intake you want. Find a used HSR,Miniram,or Superam.
Search me at youtube.. slrvette ...tons of videos of driving the car
Gains...well on my stock bottom 350 it has a lot of spirit, but I also was camed,geared and had dual exhaust. Best mod you'll ever do is the ecm change...
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
BTW, I like QWS' better than mine!
And, this fall, mine might be for sale.
Last edited by LD85; Jan 24, 2012 at 12:08 PM.
Racer
Joined: Oct 2011
Posts: 312
Likes: 0
From: state of insanity
Question for the pros,i was once told by a local vett shop that the injection set -up from a 85 is basically a direct bolt on for the cfi. you can get away with the 84 ecm or 85. is this so and how much of a gain would smeone expect. i like our cfi but reading your thread just got me thinking about what they told me.
Melting Slicks
Joined: Jan 2005
Posts: 2,658
Likes: 4
From: Clifton Park NY
Question for the pros,i was once told by a local vett shop that the injection set -up from a 85 is basically a direct bolt on for the cfi. you can get away with the 84 ecm or 85. is this so and how much of a gain would smeone expect. i like our cfi but reading your thread just got me thinking about what they told me.
84 is a MAP car
85 is a MAF car
What they told you is BS..an a vette shop told you that.
Pro
Joined: Jul 2002
Posts: 703
Likes: 0
From: Milwaukee Wi
If you want to ditch the CF induction there is another option.
1. single plane manifold. Weiand low profile, pro products, or the one I see on EBay(Pro 1 or something) cheap. rails FP reg and lines to stock fuel hardline
2. adapter neck to a LS TB see Summit.
3. reconditioned injectors(FIC)
4. EBL with Ham board(see DCS) to mate to your stock harness. Or stock GM ECM with Ham Board.
5. A TPI pump
6. Spectre induction tube to a cone filter placed in a decent spot or right on LS TB..
1. single plane manifold. Weiand low profile, pro products, or the one I see on EBay(Pro 1 or something) cheap. rails FP reg and lines to stock fuel hardline
2. adapter neck to a LS TB see Summit.
3. reconditioned injectors(FIC)
4. EBL with Ham board(see DCS) to mate to your stock harness. Or stock GM ECM with Ham Board.
5. A TPI pump
6. Spectre induction tube to a cone filter placed in a decent spot or right on LS TB..
Racer
Joined: Oct 2011
Posts: 312
Likes: 0
From: state of insanity
Thread Starter
Heel & Toe
Joined: Jan 2012
Posts: 16
Likes: 0
since i read your response this am ,i tried calling this shop to verify,what or how. after several tries i made other calls and found out that they are out of business. wonder why. i'm no injection expert,so thanks for your info. by the way whats the diff. betweeen MAP and MAF in a thousand words or less.lol
maf= mass airflow sensor (located before throttle body).
Pro
Joined: Jul 2002
Posts: 703
Likes: 0
From: Milwaukee Wi
MAP is manifold absolute pressure or manifold vacuum. Same. Uses a pressure/vac sensor. Helps calibrate fuel needed. Less Vac more fuel in general.
MAF is mass air flow. A sensor after the throttle body. Has a heated wire to montor air flow. More air sensed more fuel flows.
MAF is mass air flow. A sensor after the throttle body. Has a heated wire to montor air flow. More air sensed more fuel flows.
Thread Starter
Heel & Toe
Joined: Jan 2012
Posts: 16
Likes: 0
MAP is manifold absolute pressure or manifold vacuum. Same. Uses a pressure/vac sensor. Helps calibrate fuel needed. Less Vac more fuel in general.
MAF is mass air flow. A sensor after the throttle body. Has a heated wire to montor air flow. More air sensed more fuel flows.
MAF is mass air flow. A sensor after the throttle body. Has a heated wire to montor air flow. More air sensed more fuel flows.