View Poll Results: Will polishing the inside of an intake manifold improve performance?
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D17VTECPOWER threads consolidated - how a member should not behave
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Can I use my AC for more power?
I came up with the idea of wrapping a copper tube around the low pressure AC line that comes out of the evaporator and running my fuel through that to cool the fuel. Basically a fuel to refrigerant heat exchanger. Would cooling my fuel gain any power? I know that this idea sounds dumb, but the Dodge Demon uses the AC to cool the air for more power. I can't cool my air with my AC, but I could definitely cool the fuel with it. Could I gain power by doing this?
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Rep Power: 119 Is my PCM going out?
My Civic has been setting a P0600 and P0602 code. It also sets random codes for no reason, flashes the engine light when there is no misfires, doesn’t always set an o2 sensor code anymore for the missing post cat o2 sensor, and the transmission has been acting strange. As you know, the trans wouldn’t go into 4th gear, but it would for about 5 minutes if I disconnect the battery to reset the system, then it would downshift back to 3rd gear. Then, for no reason, the trans downshifted to 1st gear going 50 on the highway, almost getting me rear ended. After that, the trans wouldn’t shift out of first gear unless I put the shifter in 2. I turned the engine off and back on, and it shifted fine. It went into 4th gear no problem for several days. But then I reset the PCM, and now it won’t come out of 3rd gear again. But sometimes, the transmission stays in 2nd gear until about 45, then skips right to 4th, then harshly downshifts back to 3rd for no reason after a few seconds. What does this mean? Could something else besides the PCM be bad causing this? All the grounds are good. Thanks in advance for the help!
Last edited by D17VTECPOWER; May 7, 2018 at 10:06 AM.
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Re: Is my PCM going out?
If it quacks like a duck it might be a duck. If it acts like a bad PCM and is installed on a civic from a generation of civics known to have burned PCMs it is likely a bad PCM. You could have a bad trans, but if it is setting PCM fail codes then there's your sign.
Don't worry when your car knows there is a problem a brightly colored light will turn on and it will tell you where to start looking. If the PCM says "hey I am broken" you should probably listen to it.
Don't worry when your car knows there is a problem a brightly colored light will turn on and it will tell you where to start looking. If the PCM says "hey I am broken" you should probably listen to it.
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Rep Power: 119 Re: Is my PCM going out?
If it quakes like a duck it might be a duck. If it acts like a bad PCM and is installed on a civic from a generation of civics known to have burned PCMs it is likely a bad PCM. You could have a bad trans, but if it is setting PCM fail codes then there's your sign.
Don't worry when your car knows there is a problem a brightly colored light will turn on and it will tell you where to start looking. If the PCM says "hey I am broken" you should probably listen to it.
Don't worry when your car knows there is a problem a brightly colored light will turn on and it will tell you where to start looking. If the PCM says "hey I am broken" you should probably listen to it.
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Rep Power: 211 Re: Can I use my AC for more power?
Probably wouldn't be worth the trouble. Running a copper line in parallel touching the AC tubing would be much easier than trying to finesse copper to coil around it without damaging the copper tubing.
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From: MURICA
Rep Power: 143 Re: Can I use my AC for more power?
No, you will not gain any power.
The hellcat uses the AC as an aftercooler to cool the intake air charge after it passes through a positive displacement supercharger. Your car doesn't have a positive displacement supercharger between its heads.
Your car has around 120 hp stock (revised 2006) and driving an AC compressor likely requires about 10 HP. You are not going to gain 10 HP from a fuel line mod to offset the lost power. Also rerouting fuel lines is potential very dangerous since gas is extremely volatile and flammable(great combo there). Think about AC compressor location in the front of the car, this is NOT where you want fuel lines to be located in the event of a crash.
Honestly if you want more power your best bet is to start with a car designed with power in mind. Pick up a 2006 Si and you will be light years ahead of anything you can do to a 1.7 civic. The money spent on adding power to a D engine is adds up fast, or you could just start at 200 hp with a properly designed factory vehicle that will last 200k miles.
The hellcat uses the AC as an aftercooler to cool the intake air charge after it passes through a positive displacement supercharger. Your car doesn't have a positive displacement supercharger between its heads.
Your car has around 120 hp stock (revised 2006) and driving an AC compressor likely requires about 10 HP. You are not going to gain 10 HP from a fuel line mod to offset the lost power. Also rerouting fuel lines is potential very dangerous since gas is extremely volatile and flammable(great combo there). Think about AC compressor location in the front of the car, this is NOT where you want fuel lines to be located in the event of a crash.
Honestly if you want more power your best bet is to start with a car designed with power in mind. Pick up a 2006 Si and you will be light years ahead of anything you can do to a 1.7 civic. The money spent on adding power to a D engine is adds up fast, or you could just start at 200 hp with a properly designed factory vehicle that will last 200k miles.
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Rep Power: 119 Re: Can I use my AC for more power?
Thread Starter
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Rep Power: 119 Re: Can I use my AC for more power?
No, you will not gain any power.
The hellcat uses the AC as an aftercooler to cool the intake air charge after it passes through a positive displacement supercharger. Your car doesn't have a positive displacement supercharger between its heads.
Your car has around 120 hp stock (revised 2006) and driving an AC compressor likely requires about 10 HP. You are not going to gain 10 HP from a fuel line mod to offset the lost power. Also rerouting fuel lines is potential very dangerous since gas is extremely volatile and flammable(great combo there). Think about AC compressor location in the front of the car, this is NOT where you want fuel lines to be located in the event of a crash.
Honestly if you want more power your best bet is to start with a car designed with power in mind. Pick up a 2006 Si and you will be light years ahead of anything you can do to a 1.7 civic. The money spent on adding power to a D engine is adds up fast, or you could just start at 200 hp with a properly designed factory vehicle that will last 200k miles.
The hellcat uses the AC as an aftercooler to cool the intake air charge after it passes through a positive displacement supercharger. Your car doesn't have a positive displacement supercharger between its heads.
Your car has around 120 hp stock (revised 2006) and driving an AC compressor likely requires about 10 HP. You are not going to gain 10 HP from a fuel line mod to offset the lost power. Also rerouting fuel lines is potential very dangerous since gas is extremely volatile and flammable(great combo there). Think about AC compressor location in the front of the car, this is NOT where you want fuel lines to be located in the event of a crash.
Honestly if you want more power your best bet is to start with a car designed with power in mind. Pick up a 2006 Si and you will be light years ahead of anything you can do to a 1.7 civic. The money spent on adding power to a D engine is adds up fast, or you could just start at 200 hp with a properly designed factory vehicle that will last 200k miles.
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From: MURICA
Rep Power: 143 Re: Can I use my AC for more power?
So how do you plan on tapping into the special quick connect high pressure fuel lines? No easy to modify hose clamps (or rubber lines) on these cars.
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Rep Power: 211 Re: Can I use my AC for more power?
If you're going to do it (and doubt you will) try parallel first for ease, wrap aluminum foil around both pipes and use a foam insulator around the aluminum foil. Will at least give you an idea of benefit.
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Rep Power: 103 Re: Can I use my AC for more power?
hot fuel and warm humid air are better for fuel economy. if you did end up making any more power, it would come while the car was cruising with the AC on and the engine was not needing any more power, and all you would get is worse fuel economy.
you'd be better to leave the fuel alone, and have the car suck your cold a/c air from the cabin when you floored it, IMO. like if you had a duct running through the firewall with a vaccum operated flap like a 1979 camaro z28 used for the air induction hood.
i thought it was funny that the first time you posted it they locked it before anyone had a chance to respond. i mean, it made me giggle.
you'd be better to leave the fuel alone, and have the car suck your cold a/c air from the cabin when you floored it, IMO. like if you had a duct running through the firewall with a vaccum operated flap like a 1979 camaro z28 used for the air induction hood.
i thought it was funny that the first time you posted it they locked it before anyone had a chance to respond. i mean, it made me giggle.
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Rep Power: 119 Re: Can I use my AC for more power?
hot fuel and warm humid air are better for fuel economy. if you did end up making any more power, it would come while the car was cruising with the AC on and the engine was not needing any more power, and all you would get is worse fuel economy.
you'd be better to leave the fuel alone, and have the car suck your cold a/c air from the cabin when you floored it, IMO. like if you had a duct running through the firewall with a vaccum operated flap like a 1979 camaro z28 used for the air induction hood.
i thought it was funny that the first time you posted it they locked it before anyone had a chance to respond. i mean, it made me giggle.
you'd be better to leave the fuel alone, and have the car suck your cold a/c air from the cabin when you floored it, IMO. like if you had a duct running through the firewall with a vaccum operated flap like a 1979 camaro z28 used for the air induction hood.
i thought it was funny that the first time you posted it they locked it before anyone had a chance to respond. i mean, it made me giggle.
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Rep Power: 367 Re: Can I use my AC for more power?
aluminum foil is supposed to go on the head (yours, not the engine's)
chemically speaking, why cooling fuel would even increase power?
chemically speaking, why cooling fuel would even increase power?
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Rep Power: 119 Re: Can I use my AC for more power?
I did that before, like I said. The noise was too much. Also, I didn't gain a noticeable amount of power. Probably because of the extra length of piping. The pipes I used weren't very large either, so I'm sure that didn't help.
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Rep Power: 211 Re: Can I use my AC for more power?
Here's another suggestion: run an additional intake from front of car directly in to your cabin so, we can collectively fart in your general direction and hot-box you while your windows are up...lol.
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Rep Power: 119 Re: Can I use my AC for more power?
Funniest thing I have read in days... virtually every post of yours is about non-noticeable performance gains on our car.
if it’s not Kturner/turbo/cam then your not going to notice it, except ripping out all the non essential interior / exterior pieces.
You would be surprised how much dead weight there is in all that trim..
if it’s not Kturner/turbo/cam then your not going to notice it, except ripping out all the non essential interior / exterior pieces.
You would be surprised how much dead weight there is in all that trim..
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Rep Power: 119 Re: Can I use my AC for more power?
Funniest thing I have read in days... virtually every post of yours is about non-noticeable performance gains on our car.
if it’s not Kturner/turbo/cam then your not going to notice it, except ripping out all the non essential interior / exterior pieces.
You would be surprised how much dead weight there is in all that trim..
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Rep Power: 103 Re: Can I use my AC for more power?
you realize since it's a civic and not a forced induction fed racecar tuned to the ragged edge of having detonation, you could very likely just add a resistor to the IAT sensor and get the same result as actually having colder air.
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Rep Power: 119 Re: Can I use my AC for more power?
I doubt it. Dumping in more fuel does no good if you don’t have the oxygen to burn it. Colder air is more dense, so it contains more oxygen.
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Rep Power: 119 Which pistons should I get?
The wrist pin for cylinder 1 is clacking. I guess that’s what happens when you get pistons from a junkyard and run the s*** out of the engine. So I am going to be replacing at least that piston before something fails and ruins the engine. I probably should quit flooring it until this is fixed also. My question is should I replace just that piston with another D17A1 piston, or should I replace them all with D17A2 pistons? Once the head and oil pan is off, it’s not much more work to change all the pistons, so I think I’ll replace them all with the higher compression D17A2 pistons. What would you do?
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Rep Power: 103 Re: Can I use my AC for more power?
more fuel? ... are you sure about that? o2's should keep that inline. on mine Air Charge Temp effects timing quite a bit:
but ACT does not effect my fueling(unless i change something):
ECT effects fueling. mostly to help with startup enrichment, or to cool the motor when temps get too high. ...but not ACT. i think people mix them up
i'm playing with 1992 ford stuff though, maybe a honda is different/smarter
but ACT does not effect my fueling(unless i change something):
ECT effects fueling. mostly to help with startup enrichment, or to cool the motor when temps get too high. ...but not ACT. i think people mix them up
i'm playing with 1992 ford stuff though, maybe a honda is different/smarter
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Rep Power: 119 Re: Can I use my AC for more power?
more fuel? ... are you sure about that? o2's should keep that inline. on mine Air Charge Temp effects timing quite a bit:
Attachment 112186
but ACT does not effect my fueling(unless i change something):
Attachment 112187
ECT effects fueling. mostly to help with startup enrichment, or to cool the motor when temps get too high. ...but not ACT. i think people mix them up
i'm playing with 1992 ford stuff though, maybe a honda is different/smarter
Attachment 112186
but ACT does not effect my fueling(unless i change something):
Attachment 112187
ECT effects fueling. mostly to help with startup enrichment, or to cool the motor when temps get too high. ...but not ACT. i think people mix them up
i'm playing with 1992 ford stuff though, maybe a honda is different/smarter
