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cheat the hack!

Old 12-28-2003, 08:31 AM
  #1  
3.0 BAR
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Default cheat the hack!

is there a way I can cheat the hack to run about 20 psi? I will be running very low compression with je pistons, and I want to make at least 400whp, but I have afc hack, and word is 10-12 psi=CEL any ideas? extra injectors, fmu? cheap cheap
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Old 12-28-2003, 08:35 AM
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Default Re:cheat the hack!

I don't think you want "cheap cheap" if your planning on 400 hp... I'd say forget the hack, do it right and do some ecu tuning.
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Old 12-28-2003, 09:02 AM
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Default Re:cheat the hack!

I agree...you shouldnt cheat 400hp. But...If you wanted to you gould install a voltage divider out or your map sensor wire. Look up a "wheatstone bridge" ob google. By choosing different resistors you can choose what percentage your voltage is scaled down by. Im not sure if the sensor will physically max out at 20psi though. You could also install and GM MAP and use the resistors to scale 20psi to the fulll range of 5V
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Old 12-28-2003, 11:03 AM
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Default Re:cheat the hack!

what GM cars have a better map sensor? doesit have be off a turbo car? how does it work, or could do like cybernation and add FMU?
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Old 12-28-2003, 11:11 PM
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Default Re:cheat the hack!

umm a voltage divider will not work, even if you say divided all voltage by half, since the limit on the map sensor is 5v @ 12 psi, if you divide by 2 then @ 12 psi you would get 2.5v, but at any higher psi you would still get 2.5v because 5v is the output limit.

I have question, do the 2 and 3 bar map sensor still output from 0-5v?

the only way you could use a 1 bar map sensor to see more than 12 psi is basically to bleed boost from the sensor, maybe from a series of check valves. If the bleeding is linear to the boost then you should be fine, but you would probally have to do some serious fuel mapping. If not then you gotta have some mechanisim to calibrate for the non linearity, but you would still have to do some serious fuel remapping. In the end just get a 2 bar MAP sensor because there is no way to use it for 20psi without alot of freaking work.

A 2 bar map sensor from GM cars still cost as much as a honda map sensor, probally bout 200 bucks USD.
FYI.
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Old 12-28-2003, 11:19 PM
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Default Re:cheat the hack!

Don't even think about it. A friend of mine and I tried it on his Integra. It had JE Pistons and Eagle rods. He started running 15psi with the timing retarded. It seemed to be working pretty good, so we installed water/methanol injection and upped it to 20 psi. So as soon as we got it turned up we headed out to the club, made it about 10-15 miles and then it blew. After dissasembling the motor we found not only that a sleeve was cracked, but the pistons were destroyed from detonation.
JE Pistons are too expensive to waste with cheap fuel management.
Now I run the AFC hack in my civic at 8psi and swear by it, but it's not suitable for 20psi.
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Old 12-29-2003, 12:51 AM
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Default Re:cheat the hack!

a lot of guys on the honda-tech forum said the they use the missing link+fmu with the afc hack with no problems, so whats up?
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Old 12-29-2003, 10:21 AM
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Default Re:cheat the hack!

Ridiculous...


If you're spending money on your engine, what the hell would you not spend money on decent engine management. Come on now, ----.. there are VERY (FREE!!!) alternatives to "the hack" that will take care of your needs.

IT's not my motor but here's my advice: You are building a "real" race engine, use "real" management. Otherwise, you're going to pay more in the long run when you're repairing things.
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Old 12-29-2003, 02:00 PM
  #9  
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Default Re:cheat the hack!

its just suck that I spent all this money on vafc and components for the hack, but now its not worth it because I'm probably gonna have to buy hondata, and plus I dont have anywhere to tune anything, so I need something simple that works, I cant beleive the vafc is a piece of ----, why do people recomend using it? its not cheap! only 12 psi. sucks!!! plus I cut my dash and remove ac duct to install this, but there have to be a way to get away with it, HMT
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Old 12-29-2003, 02:10 PM
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Default Re:cheat the hack!

The AFC hack isn't that shitty, it's just not meant for high boost applications. I mean, c'mon.. 20psi? There is only so much you can expect. It's a hack.

Not to mention with 20psi, you'll have far more things to worry about than just your MAP Sensor code.. What about your MAP sensor's resolution? What about your fuel and timing tables based on that resolution?

What ECU generation are you running? OBD0 you can use TurboEDIT.. OBD1, use Uberdata. True ECU Engine Management is going to be your best bet.
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