I sold my Trans Am and got this...

[wowsers]

Famine, heat is a bi-product of combustion and the amount of heat created is relative to the amount of power produced. Dūšbāg.
And, with the chip, you can control the air intake as well, afaik.

The reason why a 20$ resistor isn't built into the car at the factory is because of:
1. Marketing. You pay more for the same engine to produce more power.
2. Because the engine and other parts of the car would need to be more durable, hence rising production cost.

The day a resistor adds 40 hp to a 135,000 mile 1997 ford diesel, is the day i will go into the resistor selling business. you should buy a tornado and an electric supercharger on ebay.

 

[LSX]

Man don't knock the E-Superchargers, I got gains of over 190 IRWHP.

 

[bin0]

Haha, Cool new truck!

 

[Prosthetic]

Guys I think hes thinking of Type-R badges that give an instant 40HP... Jebuz..


Grats on the truck! I've fancied that generation F Series.. I had a model of one that was dark green that I fell in love with as a kid.

 

[wowsers]

Man don't knock the E-Superchargers, I got gains of over 190 IRWHP.

I must of hooked mine up wrong then

 

[nitrorustler41]

stage 1 injectors, plus a custom tuned chip, 17* HPOP and a home made water-meth system will dyno at around 33-350 hp, and 600tq

pretty cheap mods, and you can make that power on a stock turbo.

I know how they "work". Problem is that they don't.

More fuel + same air = less power = more unburned fuel = emissions fail

diesel is completly different then gas car.

when you add more fuel, you load the engine more, and the turbo makes more boost automatically to compensate. diesel engines make power with fuel...end of story. the boost is just there to keep EGT's down.

btw, my truck is 100% emissions exempt. so I can roal a huge cloud of smoke out, and nobody can say a word

the resistor I put in goes in the injection control pressure sensor (ICP)

it tricks the computer to boost pressure to the high pressure oil pump, and its makes more power.

google 10k mod

its a big craze with the powerstroke guys. I am running a 15.6k to make more power

 

[Famine]

diesel is completly different then gas car.

No, really?

Not quite.

Diesel combustion may be different from gasoline combustion (May, Famine? May? It IS different!) but it still requires an appropriate air/fuel ratio. What exactly IS appropriate depends and the governer decides.

You start ramming more fuel in there and the first three side effects are:

* More noise
* More emissions
* More heat

You're more likely to make more power as well than in a petrol engine because of stoichiometry - the petrol just won't burn and you'll have a rich-running car - but it'll do way more harm than good.

Ultimately, if a 20 cent resistor made cars faster, it'd be on there from the factory.

Having a large amount of accumulated fuel in the combustion chamber when combustion commences is a bad thing, for a number of reasons:

I) It increases emissions, particularly NOx. Generally speaking, NOx is created when an oxygen/nitrogen mixture is subjected to high temperatures and pressures. At the start of combustion, the combustion chamber on a diesel engine is filled with air, which is a mixture of oxygen and nitrogen. It is under high pressure. It is fairly hot. If a large amount of accumulated fuel suddenly ignites, creating a very hot flame front, the process will probably create a large amount of NOx as well.

II) It makes the engine noisy. When the fuel does combust, the more there is of it, the bigger the bang. Technically speaking, a large amount of accumulated fuel quickly combusting will result in a rapid increase in cylinder pressure, something which humans perceive as the characteristic diesel knock sound.

III) It provides localized heating of the combustion chamber. If a small amount of fuel is accumulated when combustion starts, it will more easily mix with the air in the combustion chamber to minimize combustion chamber hot spots. When a large amount of accumulated fuel is present and burns quickly, there is less time to mix with the air and localized heating is more prevalent.

 

[Jay]

diesel engines make power with fuel...end of story

As does any engine, but you need the air (oxygen to be exact) to produce any combustion in the first place. Diesels are throttleless (no butterfly) and the engine is controlled by fuel metering and governers so in a diesel playing with the fuel controller can increase power throughout the rev range to a point. That point is when it can't provide anymore air to burn.

the boost is just there to keep EGT's down.

Are you saying turbocharger boost is there to keep EGT's down? A Turbocharger is there to supply air so you can burn more fuel hence make more power.

it tricks the computer to boost pressure to the high pressure oil pump, and its makes more power.

Oil pump? I assume you mean fuel pump.

 

[Jim Prower]

Have you seen diesel fuel in winter? There's not much difference.

 

[niky]

stage 1 injectors, plus a custom tuned chip, 17* HPOP and a home made water-meth system will dyno at around 33-350 hp, and 600tq

pretty cheap mods, and you can make that power on a stock turbo.

Injectors, yes. Water-meth, yes. Custom chip, yes. None of the above are a resistor mod.

diesel is completly different then gas car.

when you add more fuel, you load the engine more, and the turbo makes more boost automatically to compensate. diesel engines make power with fuel...end of story. the boost is just there to keep EGT's down.

A turbo isn't simply there to keep EGTs down. It's there to make power. Ever driven a non-turbocharged high-compression diesel? They make no power... and they make no torque. The only reason you get anything at all out of a diesel is due to the turbocharger. And the reason diesel works nicely with a turbocharger is due to the awfully strong bottom-end required to put up with twice the compression of a gasoline engine.

Diesel engines make power with boost, end of story. It seems what your resistor mod is doing is simply allowing the turbo to spool up faster by creating load (as an interesting by-the-bye... this is one good argument against using a dynojet to measure whp for turbos... inertial load will not allow as much boost as a power-brake).

btw, my truck is 100% emissions exempt. so I can roal a huge cloud of smoke out, and nobody can say a word

It's your air. Help yourself.

the resistor I put in goes in the injection control pressure sensor (ICP)

it tricks the computer to boost pressure to the high pressure oil pump, and its makes more power.

google 10k mod

its a big craze with the powerstroke guys. I am running a 15.6k to make more power

Unless you have bigger injectors and other mods, you're not really going to make much power with a resistor... definitely not as much as you can make with an actual chip-tune. From feedback from those who've actually tested resistor mods (and, interestingly enough, I was actually re-reading an old article on this on autospeed.com this morning), there are some gains in response... but nothing in the region of 40 hp... usually gains are more like 5%... or zilch.

Without tuning on a dyno, and without a way to control injection timing, as with a chip (this is the big ticket for extra power on turbodiesels, besides more boost), you're really not going to get that much in extra power from your engine. With chip-tuning, gains are more like 16% to 20%... (chip only) or more... depending on how inefficient the stock tune is. Add meth and some basic breathing mods to that and you can be making around 50% more power.

Don't cheap out. Get the real thing... ...accurate engine control beats a simple injector overdriver anyday.

 

[Cano]

trans am for diesel truck? fail of the year. nice truck, though.

 

[TorqueHappenS08]

Exactly.

You don't measure torque at the wheels. Why? Because your gearbox multiplies torque!

Do you by any chance own, drive, or operate a bob standard Fiat panda? Do you also act weird and Generally come off as a know it all spouting logical rubbish no one want's hear about?






















May?

 

[Jim Prower]

No. Wrong Gender, if I remember correctly. ;3

 

[homeforsummer]

Someone enlighten me on diesel exhausts. The OP says he's chopped the exhaust off after the downpipe. This I'm sure will be brilliant for creating lots of noise, but with diesels does it create the same problem it would with a petrol car and kill the power and torque? Would it have the same issue where reduced backpressure will let a higher proportion of air into the combustion chamber and cause leaner running?

I don't know much about diesels so this is a genuine question.

 

[niky]

With turbos, you can never have too little backpressure... but this will depend on the ECU controlling the turbo... some turbo cars will sense the quicker spool-up of the turbo and limit it, anyway... giving you no gains... (hell... some modern turbo cars do their darndest to negate any gains from breathing mods) but from what I recall... almost all turbodiesels can do with less exhaust restriction.

Naturally aspirated cars lose power with too much exhaust not due to reduced backpressure... but because you have too little airflow to ensure the exhaust goes out the other end... an analogy would be trying to blow spitballs through a straw... too big a straw, and it would take too much air to get the spitball moving at any speed. With turbos... the turbine is the spitball. Anything that gets past it doesn't matter, anymore... oh... and a turbo acts as a pretty good muffler, too... uncorked turbo cars aren't anywhere near as annoyingly loud as uncorked naturally aspirated motors.

Now... if you simply removed the exhaust completely... no problem with airspeed... then your naturally aspirated engine will make a heck of a lot more power... of course, a properly tuned exhaust can make almost as much, or probably more, thanks to the scavenging effect of tuned exhaust runners...

 

[nitrorustler41]

the resistor is temporary. and yes, i meant high pressure oil pump. powerstrokes use a high pressure OIL pump to fire the injectors.

the resistor can cause a rougher idle due to the higher firing pressure. just google 10k mod. trust me, it will show you what you want to see


also. i noticed a decrease in spool time, and dropped EGT's with the removed exhaust. my dowpipe is flatteded like a pancake, so it doesnt move much air. i am upgrading to a 3" mandrel bent one come spring time


btw, there are proven chassis dyno tests, where a memeber of a different forum took a few resistors to his dyno session did several pulls. the 15.6k resistor showed a gain of 40+ WHP

 

[Jay]

Now... if you simply removed the exhaust completely... no problem with airspeed... then your naturally aspirated engine will make a heck of a lot more power... of course, a properly tuned exhaust can make almost as much, or probably more, thanks to the scavenging effect of tuned exhaust runners...

Yeah removing the exhaust completely (on NA) would reduce power over a tuned system due to the lack of scavenging effect and due to the likely hood of reversion exhaust on overlap (due to the lack a low pressure behind a higher velocity mass of escaping gas).

 

[homeforsummer]

Invisible rep for Niky and Jay, thanks for the info 👍 I tried to have a look myself but couldn't really find anything that explained it to me simply.

Incidentally, performance or no performance, is it not rather stupid hacking off the exhaust so soon after the engine bay? I do know that one of the jobs an exhaust serves is to carry poisonous gasses under and away from the car... rather than it just seeping straight back up through the engine bay and into the car...

nitrorustler41 - how abouts you give us a nice, solid link to this "10k mod" thing? I'm sure you have better sources on the information than I could find from a random google hit.

 

[Tornado]

Incidentally, performance or no performance, is it not rather stupid hacking off the exhaust so soon after the engine bay? I do know that one of the jobs an exhaust serves is to carry poisonous gasses under and away from the car... rather than it just seeping straight back up through the engine bay and into the car...

What is typically done with big diesel trucks in America is hacking off the exhaust right behind the cab and then running it up through the bed into stacks instead. I've never understood why it is done (I'd rather have side pipes if I was going to cut the exhaust in that location), but that is typically how it plays out.

 

[Jim Prower]

Well, Pullers like to run it through the hood, too, even on street-driven vehicles.

 

[niky]

Like I said... with a turbocharger, you can never go too big. And nothing is bigger than having nearly no exhaust at all. Yes, a hacked exhaust like nitro has will give you faster spool and more power.

Well, of course the other guy got more power... he dyno'd and tested and found the right resistor for his particular truck. Experimentation is the key, as even stock, not all set-ups will react the same way to the same mod... which is why I have little faith in "out-of-the-box" chip-tunes... some that we've tested have done nothing but belch black smoke. Good power, but not very good for emissions, particulate filter life or oil life.

You might want to look up autospeed.com, there's a how-to on how to make a tuning pot that will allow you to "tune" your resistor for the desired effect (heck... this is how the cheaper chips on the market work)... the writer uses it for a gasoline engine, but the principle is the same. But of course, for this type of experimentation, you must be careful not to exceed what your pump or injectors can handle. Still, it's a fascinating littlle project, and something that'd be more fun and functional... you'd be able to compensate for temperature and conditions, while retaining the ability to "return to stock" on the fly.

 

[nitrorustler41]

update.

i am gonna buy a horn relay, and wire that with my resistor inline. i will make better power, and when the relay clicks over, it will idle like stock, but when the throttle is increased, it activates the resistor to boost pressure, and see the power gains.

http://www.powerstrokenation.com/forums/showthread.php?t=41192

i cant wiat to get it installed

 

[Jim Prower]

So...you're basically building your own cheap chip.

 

[niky]

Pretty much... ...I wish I could do that with my car... electronic ignition systems, though... so damn picky...

 

[Sniffs]

hold it right there, son.
don't hack that thing up too much, you got a collector's peice. that's the last year super dutes were in the same bods as regular F's. and you got a damn well cared for piece right there. it's rare to see a 94 body in that good a shape (by then all of the 94's around here have been utility beaten to death)

 

[buickgnx88]

Actually '96 was the last year the 1/2 ton and super duties shared the same body, but I agree with the rest of your statement!

 

[nitrorustler41]

hold it right there, son.
don't hack that thing up too much, you got a collector's peice. that's the last year super dutes were in the same bods as regular F's. and you got a damn well cared for piece right there. it's rare to see a 94 body in that good a shape (by then all of the 94's around here have been utility beaten to death)

its got the heavy duty option package, and a 5 speed

4.10 gears, heavy duty front suspension, gvwr 8500+ lbs

this baby was made to rip stumps outta the ground, and you better beleive shes gonna get a work out.

im lookin at wheels and tires right now. some nice 33's

 

[Keef]

Exactly.

You don't measure torque at the wheels. Why? Because your gearbox multiplies torque!

Chassis dynos compensate for gear ratios. You know that. What is so questionable about 600 pound-feet? Would you like him to take the engine out and measure it on an engine dyno?

Today's HD engines all have over 600 lb-ft from the factory. Slap some simple electronic tuners on them and you can gain a hundred or more horses and bazillions of torques instantly. And make it adjustable on the fly. The big diesel trucks here in the States are gaining ground on those Nissan Patrols from the desert pretty darn quick.

 

[homeforsummer]

What is so questionable about 600 pound-feet?

I don't think Famine was questioning the figure itself. He was just commenting that torque is normally quoted at the crank as by the time it hits the wheels it's multiplied by the gear ratio. I didn't think his comment was that hard to follow or that ambiguous...

 

[Sniffs]

i ain't protesting 33's super dutes are about the only truck that looks right jacked up for a ladder.

it's just nice seeing a Dute that isn't...
beat to death
badly camoed
monster trucked
red
beige!