raverx3m

iTrader: (1)

my friend that builds hot rods ordered one custom made for his car.
but he said i can still find them on ebay for decent deals.
the one he got is pretty small and he got it on a big block v8 with bunch of acessories and decent sound system.
i dont know where exactly he got it from tho.

GagnarTheUnruly

iTrader: (3)

With Neptune you can switch maps with an input switch. It would be cool to rig a toggle switch that let you go back and forth between fuel economy maps and performance maps.

raverx3m

iTrader: (1)

would be cool if the map would switch automatically above certain speed
that way it would only switch in 5th gear for freeway cruising

mpgmike

Usually map switching is reserved for different fuels, where timing maps would be different. You can tune for economy in the cells where you would drive for economy, and tune for power in the appropriate cells. It only takes one tune.

Mike

raverx3m

iTrader: (1)

but when tuning for freeway economy im gonna have that lean area on my map from 3000 to 3500rpm when city driving and accelerating i would still pass that area wouldnt that be bad for the motor?
whats the typical vaccum read for freeway cruizing?

GagnarTheUnruly

iTrader: (3)

Ah I guess that should've been obvious.

mpgmike

With your X-Y load/RPM map, when you're accelerating, you will be in a higher load cell than when you are cruising. If not, add resolution in that area.

Mike

raverx3m

iTrader: (1)

good idea lol i blew out my tune to 24x24 and it got a bit crowded lol
is it harder to tune full resolution on a dyno or easier?

and also since most of the tunes are 10x20

how should the extra tables be used?
i just expanded every other column and every other RPM row.

i know its not "i used just because theres 24x24 tables" the right way to go about it.

and i wanted to ask about your head porting experiences.

when doing head work does the MPG work get in the way of performance porting or does it compliment the porting by adding better MPG
and also im assuming that having the engine ballanced and blue printed would help MPG by how much?

mpgmike

Pardon me while I jump around a bit, raverx3m. Balancing enables high RPM stability without grenading parts. Blue printing assures clearances are all within tight specs.

As for head porting, high velocity rules! If porting for high-RPM power, then large ports will allow high flow and still maintain velocity in the high-flow range. If porting for economy, smaller ports will deliver the velocity where you would drive for economy. When I did the X-Prize Sonata, I used 5 tubes of epoxy in the intake ports. The compromise is Powre Lynz. I can hog out a port, load it with screw threads (Powre Lynz), and still get awesome torque and fuel economy.

As for table resolution, if you are getting smooth transitions in a block area, your resolution is fine. You may even be able to reduce it some. When you get glitches, then higher resolution is needed. Frankly, I've used Motec, Link PC, and MegaSquirt. I tuned a 2001 Dodge Van, the 2008 Sonata, and an engineering project stationary engine (permanently a dyno queen). To tune a cell, you have to get into that cell. To know what to do with that cell, you must have "eyes" that tell you what the results are. Eyes would be gauges, a data logger, etc.

Hope this helps.

Mike

98vtec

you can. you can load and switch to up to 3 tunes.

www.hrtuning.com

sweesiong78

Hi mpgmike, I have a question on your powerlynz, will this work on a D16y7 multipoint type fuel injection engine? I read somewhere your method is meant for carb or throttle body EFI, so just want to clarify.

Also how much work would this take? can it be DIY, or does it have to be sent out to a machine shop with your power lynz tool? and can any headwork machinist to the powerlynx threads?

pkopalek

I got 35-38 on the highway with my 92 GSR tranny (4000rpm @ 70mph, I ran 15.5-16.0:1 with E10 93 octane), and I melted my exhaust manifold apart as well.

EGT's will ruin your day!

98vtec

Not enough advance

tianporn

Can someone post a generic target a/f ratio table and timing table. I just want to get an idea of how lean and what timing you're running on a lean burn tune.

Thanks

theYBLEGAL

It depends on your motor.

But I was getting 40mpg, in my flat indiana environment. Stock timing, b16, just leaning the fuel, 15.5-16s for afr, had no cooling issues. Have intercooler, ramhorn (heatwrapped), turbo (water/oil), and half size aluminum radiator. Stock hood, bumpers, grill.

Just make small changes and test a lot. Street tuning is only way to go for mpgs. I spent over a month foolin with temperature tables, and coolant tables, to make it stable/predictable. Different day, different readings. Always.