What are the recommended shift points for max fuel economy on the SS/TC? Is it around 2000 or 3000 RPM?

I found that if I'm applying more load at 1000-1500 RPM, there's a lot of engine shake. It's enough to cause excessive rattling of the dashboard and interior.

 

I dont get this engine shake, but im not flooring it either at that rpm. I shift at 3000 rpms when going up hill, but shift at 2000 rpms when on a flat level surface. down hill I just let her roll.

I try never to get into boost above maybe 1psi.

 

The less engine load the better. I shift at 3500 in first and 3K in the other gears. You want to keep it at 2K and up or it bogs and loads up badly and gas mileage goes down. I average 32-33 MPG

 

I shift at 3k and cruise around 2200. I get about 25-28 mpg

 

This is exactly how I shift but I drive like an idiot and only average 27 MPG. Granted, I'm generally never on the interstate even though I live in Minneapolis, so it's not that bad really.

 

I drive a mix of local/highway driving. On pure highway cruising on flat roads, I get about 30-31 MPG consistently via the instantaneous MPG reading. So my mixed fuel economy comes to around 25-26 MPG overall, but I normally shift at 2000 RPM.

If I have to keep it at 2k or above, that means shifting at 2500-4000 RPM. I'll try it at 3500 in 1st and 3000 for all other gears. I'm not used to driving the inline 4, I always shift at 1500-2000 with my V8.

 

i shift at 3k on pretty much every gear!!!!!

 

its pretty much all about how much load you are putting on the motor... if u stay out of the boost and in the vacum you will get good fuel economy

 

I shift at 3K. Then engage clutch, let RPM completely drop off, then release clutch and slightly press gas, until the next 3K RPM mark. I also shift into neutral when possible. IE : Off ramps, parking lots, hills, etc. Use cruise control EVERYWHERE. I can usually average 35 MPG when needed. Could probably get more if I drove the actual speed limit. I always go 7-8 MPH over...under 9 ur fine, over 9 ur mine.

 

If you leave the car in fifth gear when slowing down to a stop and don't put the clutch in until you reach about 1100 rpm, the car will turn the injectors off while you are slowing. It works in other gears too, but best in 5th. When the load parameters are right, it just completely shuts off the injectors, so say going down a hill that's long enough, leave in in fifth and just take your foot off the gas..

Also, you can get better mileage not using the cruse control if you really concentrate - if you are going downhill but there is an uphill coming, slowly accelerate going down, and gradually let off as you go up the next hill. Use your momentum. The cruse control however just waits until you get below a certain speed then will accelerate harder and harder (going uphill) until you reach your set speed again, usually about the time you are getting ready to head downhill again..

 

It sounds funny, but definitely try shifting at a higher RPM. even 2000 rpm is much too low for these small engines, IMO. I shift between 3000-4000 and my DIC average displays 29.x mpg (lots of highay driving though). The car drives much smoother shifting a bit higher too.

 

when the cars cold i dont bring her past 2500rmp's but once shes warmed up i shift by 3000rpms for good gas milliage....

 

i shift at 3k rpms. but most of the time i drive my car fast so that kills my mpg. i average 22 mpg lol. idc bout fuel i just wanna have fun. i got an SS FOR A REASON!

 

I shift at 6500 every gear, I'm getting an avg of 16MPG



jk. I usually shift around 3-4k and on flat roads w/ cruise going 60mph in 5th gear my INST sits between 40-45mpg. I know its really odd, but I've calculated it manually and its right on! The biggest increase seem to come from my downpipe and intake.

 

When I'm just cruising around town, I usually shift at 3k. 2k RPM seems to be close to the point between useable power, economy, and bogging down.

I've noticed after my charge pipes and downpipe (installed within a short span of each other) that my gas mileage compared to stock form may have gone down during acceleration, but up when I'm cruising. This may be in my mind though, so I'm still testing it and the jury is still out on it.

 

You push the clutch in, let the rpm drop to idle, then rev match? Don't do that you are going to use more gas rev matching when you don't need to on normal upshifts. Plus your shifts are going to take a long time if you do that, more wear on the throwout bearing, etc. Don't shift into neutral when driving, it is illegal in many places for a reason. It is dangerous to be in neutral because you can't accelerate away from danger. When you are in neutral, the engine still burns fuel. If you leave it in gear and take your foot off the gas, the fuel will automatically cut off. Ever see your MPG INST Read 70-80 or 99? I do everyday, when in gear and off the gas. Maybe you haven't if you are coasting around in neutral. lol

 

I have had this car for 3 tanks of gas, now. I averaged 19/20/18 MPG. I'm not qualified to provide an answer to the original question.

 

I usually shift at around 3000 rpm.....but when highway cruising, I only put it in 5th at 65mph or more. I find that anything less then that actually gets far better mileage in 4th.

 

meh, I only avg 22.3 mpg overall. I have lots of hills near my house though, so I chalk it up to that.

 

I actually see 99MPG in neutral EVERY day as well. Maybe YOU havent watched your MPG INST go straight to 99 whenever you shift...And regarding rev matching, it helps with the syncros and the way I shift puts less strain on the clutch. I may have worded what I was trying to say wrong. I let my RPMs drop off to around 2K or so, making sure it stays in the correct range. This helps with smoother shifting, simply because our trannys are clunky little bastards. The reason I shift into neutral on off ramps, parking lots, or any other place where I will eventually shift anyways, it actually preserves the throw out bearing, simply because you are not holding down the clutch the entire time. I also put it in neutral at stop lights. It may be slightly more dangerous, put I have the reflexes of a marsupial, I'm fast, lol. Oh yeah and I still pump my brakes just to preserve my pads, off topic, but just showing my nifty thriftyness.

In regards to Isitfast, I get what ur saying about CC, and I totally agree, I use the CC on highways, and on hills I stop using it, and coast down the hill, then once the hill starts its upward approach, and I gently press gas, until desired speed is reached. The CC is purely for convenience for myself, because I tend to forget about MPG when I'm using my foot.

 

I tend to shift at about 2,600 RPMs while trying to keep the Boost Gauge reading at 10 in/HG of Vacuum or less, well more technically...er..eh...between 10 and 20 in/HG of Vacuum.

 

It takes forever to reach 2500-3000 RPM in 2nd, 3rd, and 4th gear unless I mash down the throttle, which causes the boost to pick up dramatically. Do you let it climb up slowly or do you rev it up as quickly as possible?

The GM Skip-shift generally wants you to shift into a high gear asap, but the low-end torque of that LS3 can allow you to do that. The unboosted LNF feels like a dog.

 

you drive like an idiot? i wonder what i am considered... my average is 19-21 usually...

 

I noticed that the injector shut off for coasting *seems* to only function in 5th gear, or possibly the load conditions are only present while coasting in 5th gear. The instantaneous MPG in anything under than 5th while coasting is never at 99 MPG (I was getting like 60 MPG in 4th). Once I shifted to 5th and coasted, it went up to 99.

I also observed that there wasn't a significant difference cruising at 2000 RPM in 4th versus 1500 RPM in 5th as long as it doesn't build up boost... but that K04 is easy to agitate and spool up.

 

It works for the other gears if you're above around 2200RPM.