smoke show??

rogers250 · #1 Sun, June 14th, 2009, 10:46 PM

hey guys im ordering one of the 6 postion switch on the fly tomorrow morning. i was wondering if the smoke show really works? and wats the 100 and 140 like? btw im new to this site guys!!! i got a 1996 f250 7.3 ps turbo diesel. 4 in lift, sliverline stacks, 35" BFG's

***cleatus12r*** · #2 Sun, June 14th, 2009, 11:04 PM

The smoke show is sure to really tick off a whole lot of green peace nazis.

You will only get about 70 HP out of an early powerstroke no matter what horsepower level you get above that. It takes a lot more fuel than the stock 90cc injectors are capable of delivering to get any more than that.

rogers250 · #3 Mon, June 15th, 2009, 01:01 AM

well should i go ahead and get the 100 and 140 so when i put bigger injectors in it? or just get up to the 80 for now?

***cleatus12r*** · #4 Mon, June 15th, 2009, 08:27 AM

The thing is that larger aftermarket fuel injectors are going to require slightly different programming than your stockers. For example, you could go to "Stage 1 injectors" (160 cc injectors with factory size nozzles) and using tuning for 90cc injectors would give you NOTHING in terms of performance. Stage 2s would be pretty radical (read: close to undriveable and not real healthy for the crank and rods) at low RPM using factory-injector tuning without correcting for the larger nozzles.

It all depends on what you plan on doing with the truck and its' modifications down the road. The fueling will be a little heavier at the bottom (while there's enough fuel left to be injected) with the higher HP tunes but for the most part, you'd just be throwing money away.

Hope this helps.

rogers250 · #5 Tue, June 16th, 2009, 12:42 AM

well then wat else could i do to the truck to get the max hp out of the chip?

***cleatus12r*** · #6 Tue, June 16th, 2009, 08:43 AM

Injectors, larger high pressure oil pump, and tunes to run them.

It shouldn't be too hard to lay down 350 RWHP with the right combination of parts, but 250 RWHP is about all you'll get with stock injectors and good tuning on an early PSD.

nine5flareside · #7 Tue, June 16th, 2009, 11:37 PM

Quote:

Originally Posted by cleatus12r

Injectors, larger high pressure oil pump, and tunes to run them.

It shouldn't be too hard to lay down 350 RWHP with the right combination of parts, but 250 RWHP is about all you'll get with stock injectors and good tuning on an early PSD.

so ive got a 95 302 5.0 with 19lb injectors... if i go up to lets say 24lb injectors and proper maf sensor i will see better performance?

***Jackpine*** · #8 Wed, June 17th, 2009, 12:34 AM

I'm going to come back to the OP's original post. Why pi$$ off the environmentalists? The whole idea of "smoke show" seems ridiculous to me.

A few years ago, we rode the Silverton train from Durango to Silverton and back. We were fortunate to have the CEO of the train line on board and he talked to us. This is a coal burner, and environmentalists have been giving him trouble from day one. He's done everything possible (clean burning coal, etc, etc) to minimize the impact. But, if they had their way, this wonderful piece of American history would be shut down.

Here's a link to a picture I posted in a thread for Wil Cohron: http://dygytalworld.ehost-services13...81&postcount=5

This engine has POWER! It doesn't need to advertise that ability with black smoke, in fact, when it is running properly, the smoke is a nice, soft gray color.

I honestly believe diesel is the way to go, but it won't be if people pump black smoke out of their tailpipes! Please, try to go with the flow. Don't be obnoxious.

- Jack

***cleatus12r*** · #9 Wed, June 17th, 2009, 08:12 AM

Quote:

Originally Posted by nine5flareside

so ive got a 95 302 5.0 with 19lb injectors... if i go up to lets say 24lb injectors and proper maf sensor i will see better performance?

Here's the deal with a gasser and larger injectors.....bear with me

The short answer is "no" and this is why.

A gasoline engine relies on a constant 12.5:1 (very rich) and 15.5:1 (very lean) with 14.7:1 being considered "stoichiometric" (perfect) air/fuel ratio to run. Air and fuel are both metered to always arrive at this number no matter the load, RPM, or temperature. Slightly richer mixtures are going to produce more power, run cooler, and occur under load. Leaner mixtures are going to be hotter, more prone to detonation, and occur under light loads (cruise).

One would think that putting larger injectors would get more fuel out and make more power. This is absolutely almost never the case because.........

The stock injectors will be able to deliver enough fuel to maintain the air/fuel ratio on an engine that has quite a few modifications without retuning the PCM to compensate. By compensate, I am referring to the fact that a "19 lb." injector will put out less fuel than a "24 lb." injector given the same fuel pressure, same injector on-time, and same firing frequency. To compensate for this, the PCM would have to be programmed to command the injectors on for far less time at idle and through the midrange. It is also very certain that with a near stock engine that the ENTIRE range of operation be "pulled-back" because there is simply too much fuel across the board.

You mentioned a MAF/injector combo. Ok. Well, that includes a MAF sensor that is calibrated to send a signal back to the PCM indicating that there is not as much load on the engine (not as much mass air flow through it) so the PCM automatically cuts back the injector on-time anyway. Can I ask what the point is? It's like giving a kid a Snickers bar and then getting mad that he starts eating it.

It's almost certainly something I wouldn't spend my money on.