My tuning stuff

[kverges]

PS I have a Hydra sitting awaiting install in my project car (which has gotten a bit out of hand, as I have now found a crack in the transmission case due to its former tought life), but I have not spliced it into the wiring harness yet. I am just too busy getting the mechanical issues worked out. I'd frankly perefer a tunable stock ECU, but the Hydra works GREAT in the Miata turob track cars - got 300 rwhp in the last lowly STOCK 1.8 liter miata we built based on the Flyin Miata kit. A FM kit, with Hydra, turbo, intercooler, the works is about $5500 and makes good power and reliability on a stock engine. If there was an easy transaxle solution I'd put a Miata motor in the Elise! Oh shame on me this is getting all hijacky so I'll stop.

[charliex]

agreed you're a lunatic, thread jacks don't fuss me any.

get an xede, it works, its cheap and you can tune at will.

[Lotus F1]

Originally Posted by charliex

agreed you're a lunatic, thread jacks don't fuss me any.

get an xede, it works, its cheap and you can tune at will.

An Exede wouldnt be so bad.. if it had connectors. The idea of cutting a stock or new harness makes me a little ill.

[charliex]

well if he's going with a hydra it'd be a lot worse.

[Lotus F1]

Originally Posted by charliex

well if he's going with a hydra it'd be a lot worse.

Actually that's what is a little confusing to me. The Hydra comes with the proper Tyco connectors. There is no cutting required. Don't ask me how Andrew got them as they are so impossible to get. Maybe kverges is getting the non connector type because his harness is already cut from the eManage Ultimate installation.

The idea of the the reflash really is soo appealing..nice and clean.

Charlie, does the reflash disable the cars ability to adaptive to winter driving compared to hot summer driving. Can I tune this thing and not have to worry about seasonal changes?

[charliex]

can't see why it would, (most) people didn't retune their carbs for winter, but we haven't tried it in very cold conditions yet.

maybe he is getting the connectors, so i guess i'm even more confused as to why he needs ecu tuning if the hydra works ?

i still think the xede is a simple solution for tweakers, its not that many wires, apparently the emanage ultimate is a real pita to wire in and remove.

[Westrock]

Originally Posted by kverges

I assume tuning spark in the Lotus ECU is a bit trickier for turbo, as there is no positive pressure MAP signal, right? For the S/C apps I have tuned, you know what manifold pressure will be at WOT and rpm, but the same is not necessarily true of turbo. You can basically estimate the spark retard you need at WOT with rpm and a given S/C pulley, but with variable wastegate control it is probably not so easy, and the temptation to have different boost is out there.

If you plan on going with an aftermarket mapping hardware (Hydra, Xede, whatever) you can attach a MAP sensor for it to use. The ECU wouldn't know about it, but your aftermarket hardware could use it to adjust trims.

I could dig up a graph that shows PSI readings versus voltage readings for the MAP sensor off the Dodge SRT-4's. They read up to 18 PSI and then there is one that reads up to like 30 PSI.

[kverges]

Don't get me wrong, the emanage works really fine for almost everything. I have what I think is a timing retard issue over 6500 rpm and I want to experiment with taking timing out of the Lotus ECU maps above 6500, as I think the Ltous ECU is overriding my existing timing retard. I have enough other projects that this is not that urgent for me and as Charlie said, I will probably try the XEDE as it appears to adjust timing by intercepting the CAS sensor instead of the coil output.

Charlie's solution is far more elegant and why I'd prefer to try it.

[Dave]

Originally Posted by Lotus F1

An Exede wouldnt be so bad.. if it had connectors. The idea of cutting a stock or new harness makes me a little ill.

You're only spicing 4 wires, if I remember right, so it's not exactly a butcher job. The Xede works fantastic...my car runs like it's stock.

[xtn]

Gosh I hope not. My stock car runs like crap.

xtn

[Dave]

Originally Posted by xtn

Gosh I hope not. My stock car runs like crap.

xtn

Then get it fixed

[Westrock]

Didn't see it posted in the intial list, but if the torque was there you could extend the rev limiter and associated maps?

[charliex]

aye laddie ah cuhd

Gosh I hope not. My stock car runs like crap.

try the chicken!


i'm in cali at the moment prepping for a new tuning session.

[kotten]

I have now read this threadand someone has told me that you should discuss the new track ecu which lower the power cam rpm. The new ecu lower from 6200 to 5750.

I have this fitted recently and someone at seloc forum says that this is a learning ecu, which means if you have uprated the engine with induction kit, exhaust, sports cat and so on, the ecu is lower the hp so it is still 189 bhp.

Anyone know anything about this?

I had done a dyno before and after and before i had 188 hp and after 208 hp. This mean that now after i fitted the new ecu, this ecu is lower my hp in the engine back to 188 hp.

[mike55]

Am I correct in assuming that if anything is done to my ECU then I will not pass the CA smog test?

TIA

[charliex]

kotten, my stuff still learns if you want it, i can also set the cam anywhere.

the learning ecu will correct for emissions , not power, so if that means dropping power for emissions (typical) it will.


legally this is not approved for road use, so it will not pass , although there is no way to know its there, and it will still pass an emission sniffer test and OBD2.

[ewalberg]

For background, i'm in california and it's my daily. I've a couple questions for charlie...

so if I wanted cam switchover at 4.5k to 5k is there any reason not too? Would that still be an off the shelf change?It's my daily and i just wouldn't mind the cams switching earlier so i can get that extra power without having to really make it scream.

Also, can the Traction control switch be tweaked to also kill the ABS? On the lotus and on my g-wagen i've observed that ABS can be scary, scary, scary on bumpy roads becuase it drastically increases stopping distance. Off the shelf feature? I'm not a big fan of ABS.

If my car gets re-flashed by the dealer, i lose the tune correct?

Thanks ahead of time.

[charliex]

i can disable the dealers ability to reflash either with a new program or a simple electrical modification to the car ( a hidden switch )

ABS is something i'd be very cautious altering, its also seperate to the ECU, you could probably disable it by wiring a switch to the speed sensors, however i can't recommend it. never mind all the legal ramifications.

The ABS in the elise is different to most of them, its pretty well done and you can definetely shorten braking times with it, i'd suggest looking at andy walshes DVD that shows how to shorten abs by modulating the brake and letting the ABS kick in too.


bending the rules,
http://www.carlimits.com/shop/catalogue.php?c=6

http://www.youtube.com/watch?v=1L2syqeCS5Y

http://www.youtube.com/watch?v=BBvI9...related&search

=

just don't lend him your car

[lancer360]

Originally Posted by lancer360

Charlie,

I have a question for you regarding the new reflash from S111. It says it is good for an 8 hp gain, yet Larini claims that just installing the sport cat is good for a 7 hp gain. Is the intake, exhaust, and de-cat only good for 1 hp more than the sport cat or is Larini not telling us that they did the testing with an intake and exhaust? How much more power will the headers be worth, either the existing FF or the new Larini's? I assume you have tuned a car with a FF header, de-cat, exhaust, and intake. I was hoping that this combo was going to get a little more power, or are the Lotus parts really that good to begin with?

Also, do you have a recommendation on an intake?

Charlie,

Do you have any comment on the above?

Thanks!

[charliex]

Simply answer, we went with a safe, conservative tune.

re intakes, the stock one, it works great