I know this is ******* but lets say you are going on a 600 mile trip with your TPI V8, could you disconnect an injector or two to save gas, it is all highway driving so no need for outragious power........would the car run really rough?

 

I'm not sure what the technical explaination for it is, but I'm sure it's not good for it. I went about 500 miles from Midwest City, Oklahoma(about OKC area) to St. Louis, Missouri. Only had to fill up like once, but ended up like twice cause i was calculating mileage. Got 28mpg on one leg of it, then 26, and 22, but it was a DOWNPOUR, so I slowed down...

 

NO, NO, NO, NO, NO !!!!!!!!!

 

Just in case you didn't here me the first time.

NO, NO, NO, NO, NO !!!!!

 

I know if you make it miss on both sides of the engine they will kinda cancel eachother out and the engine still runs halfway smooth.......... I bet if you took out the spark plugs on these cylinders it wouldnt cause any harm!!

 

Please Tell me your Kidding...

 

try driving around town first, I'd say for the $5 you might save, it's not worth the effort or risk of F -ing up. I've driven a while on 7 cylinders and the engine is not happy at all.

 

Mabe I didn't make myself clear enough.

NO, NO, NO, NO, NO, NO, NO, NO, NO, NO, NO, NO, !!!!!

If you want to conserve fuel on your trip, take a different car
that's easier on the gas.

 

Cadilac tried this years ago, its a great thought, but it was a nightmare for the cars, it worked in theroy, the car would shut down 2 cylinders then 4 total and you would highway cruise on 4 cylinders, the problem is the sytem was not always working, or the system would flood the cylinfders, injectors would have horrid spray patterns from the constan cycling of them on and off etc etc. As said before, do not try this at home. Your car was designed to run on 8, let it do its job.

Sean

 

Hey Hg you actually live where I do....that's cool! I finally found somebody that lives in the same city as me..... Hit me up if you get this msg...maybe we can do some 3rd Gen tag team action on all these rice burners/mustangs around here......

 

I think gm is working on the idea once again to build a v 8 that can run on 4/6/8 cyl depending on needs. I also think this is going to be for the trucks for the most part. If am wrong im sure i will be corrected.

 

Nope thats not a good idea and you probably won't save any gas. Newer cars that you're hearing about that have this system also have a way of "venting" the cylinders they "turn off" so the engine isn't wasting energy compressing air in a few cylinders...your sbc doesn't. If you wanna save gas, buy an econobox. Thats what hondas are for.

 

ummm no...i don't want a *****, i want an f-bodie but i wanted a temp way to get better fuel mileage on a trip then switch back. what could happpen tho? beside the engine being alittle rough? I don't see how you could burn something up by not giving it fuel, and like the other guy said, if you remove the spark plug then you don't have to worry about compressing air......just stick a little filter over the hole....i dunno, i was just curious.

 

If you want to improve your gas mileage, do it the right way by keeping your car in good running order, get the chip dialed in, and enable highway mode in the chip. The say hello to 30mpg or more.
Of course that makes too much sense and is way too straightforward.

 

Bwahahahahahahahhahahahahahahahahahahaha!!!

Wait... *wheezing*

BWAHAHAHHAHAHAAHHAAHA!!

 

ok relate it to this, lets cut off all your toes! the half a pound it saves in dead weight will save you that much energy in walking! but oh wait!!! those toes are what keeps your balance, the motor was designed to run on 8 cylinders thats why it has them all there, same with a 6 cylinder, 4 etc etc
like swap said
NO!! NO!! NO!! NO!! NO!! NO!!

and just to reiterate that

NO!! NO!! NO!! NO!! NO!! NO!! NO!! NO!! NO!! NO!! NO!! NO!!

 

I accidentally left my #4 plug wire off the plug one day after a spark plug swap and started my car. I didn't even notice it. The car ran as smooth as with 8 plugs. The only thing I noticed was that it obviously didn't have the same power and didn't rev as quickly. I didn't even think anything was wrong but when I went up front to put the hood down I check all my wires as I always do to make sure they weren't touching the headers and that's when I noticed it was unplugged.

There might possibly be averse affects, other than power loss, by running on 6 or 7 cylinders but I'm not sure anyone has actually tried it out to say for sure. Camaro6spd ... you could be the first to try it out and let us know.

 

Do it, Do it, Do it, Do it. Then you can write a tech article about what happens when you have a V8 harmonic balancer on a V6 engine!
j/k. Not a good idea. I think the Highway mode in the chip would be more advisable.
Now maybe an electric leaf blower you could turn on running down the highway as a supercharger effect.....

 

Hey! That's been tried before. In an import if I remember correctly. Saw it here on thirdgen sometime last year.

 

:sillylol: :sillylol: :sillylol:
HELP!!! I CANT CATCH MY BREATH!!!

Dude, Im not tryin to flame you in any way, but that has to be the funniest thing I have heard in a long time!

 

ROTFL!! :sillylol:

Me neither, but that was good!!

 

post *****




I'm sorry but I really don't think that would work 6speed

hehe nice idea I give you that but it would really throw the system out of whack

just to test it out and see how it would work kinda

remove two of your spark plugs and see how smooth the motor would run

you would put uneven loads on the motor and put a lot more stress on the bearings

 

That would be you. Crazy import driver.

 

You wanna save money on gas? There are two things you can do (that I can think of right now):

(1.) Buy a 4 cylinder economy car, in addition to your thirdgen
(2.) Get a 4 cylinder economy car instead of your thirdgen

 

(3. ) Put a 4 cylinder in your thirdgen.

 

Unplugging an injector ?? In theory the other 7 cylinders would have to work that much harder & also drag a dead cylinder to boot. Can't see any benefit there, not to mention potential engine damage.

 

Hehe, I went from my fireturd-like mid 14s to mid 16s runs in the 1/4... Wasn't pretty a 302 vert stang whooped me. Anyways, turned out I had 2 spark wires fall on the header and roast almost in 1/2. Anyways make a long story short, car died all the time... I got about 10 mpg instead of 18 and it blew out collector gaskets all the damn time. So I would probably say to not a good idea.

 

4-6-8? Leaf blower? Filters in the spark plug holes? I gotta print this thread and save it, just in case the board crashes.

I can see where it's going already:

 

IROC Deville LOL

 

 

I tried to tell e'm.

Nobody listens to me.

 

Yes it does, but because it's not a good idea. The ECM will keep the fuel/air ratio correct at highway speeds. Keep the engine tuned, drive smoothly and let the ECM do it's thing.

To improve highway mileage:
-cut back the spark plug ground electrodes (you'll pick up 8-10hp and improve mileage due to better charge burn)
-inflate tires to 35-37psi cold
-remove spare & jack (I carry a puncture repair kit, credit & cell)
-set cruise or run at steady speed, remember the ECM shuts off the injectors going down hill (the instantaneous mileage reading on my '88 Vette can go to 80mpg down hill).
-take it easy on the On ramps (a short burst of WOT will kill mileage, especially on a shor trip).

I recently made a trip in the IROC between NY & OH (750mi) in open loop on the outgoing leg due to a faulty O2 sensor. I picked up 1-2mpg on the return trip with a new O2 sensor installed.

 

Like Ede said, get after the PROM and you can get upwards of 30 mpg with a V8 TPI motor with ease. Heck I ran a few numbers on my car after the last couple days and I got about 22 mpg overall and that was maybe half highway - half city driving.... I would say my highway mileage is somewhere in the upper 20s at this point but I am definately not done with my PROM (then again, who really is ever done with their PROM when they have the ability to change it at a whim???.....lol). Highway mode RULES!!!

 

I def need to get into that.......one quick question... is there a difference between the 87 and 88 PROM...i have both computer and which would be better for re-programming if there is a difference.

-Tom