111R / Elise R engine mods

[Kal-El]

Has anyone had any success in increase the power by removing the cat, and upgrading the induction and exhaust?
If so what products did you use, and where can you get them?

P

[NathanE]

AFAIK the 111R ECU learns if the power has increased and then tunes the engine back down to 189hp. Ain't like the modding hey-day of the K series I'm afraid

[Gooby]

NathanE said:

AFAIK the 111R ECU learns if the power has increased and then tunes the engine back down to 189hp. Ain't like the modding hey-day of the K series I'm afraid

Not quite the engine learning cycle examines how the engine runs at its best (optimum) and then stays at that setting.

I have a 2bular zorst and the cars throttle responce is very crisp. Not sure about the power (never dyno'd) but on a 3rd gear shoot out with a SR @7k miles, I am significantly faster. Within 4-500 yards I had 2 car lengthes.

[Scuffers]

NathanE said:

AFAIK the 111R ECU learns if the power has increased and then tunes the engine back down to 189hp. Ain't like the modding hey-day of the K series I'm afraid

that's actually just a sympton of what your dealing with here...

In the K days, you had a 118Bhp start point with a 1.8 engine, so improvements were not hard to get, the start point now is 189 with the same 1.8L, gains are far harder to achive at this level.

realistically, without engine work, you not going to get any big gains with bolt-ons even if you had an ECU solution (leaving asside Turbo/SC bolt on's!).

[21TonyK]

I've got an ITG Maxogen induction kit and have just gone from a Lotus Stage 1 with Cat to a de-catted Larini Sport exhaust.

If there is a difference in performance it's very difficult to tell. Be interested to know how mine stacks up against a stock 111R though. Any dyno's local to me? (South Devon)

[Boggy]

Had two R's now comb's as follows:

2004 54 R tried ITG and Quicksilver, actually seemed quicker with standard Pipe & Filter

2005 55 R tried Pipercross & both Quicksilver then stage 1 about the same much more noise no power gain

You've got to do a fair amount to this engine to get more power, S/C change/upgrade Ecu, Cooling (Charger) different injector's, Exhaust I'm sure I've missed a few bit's and bob's. I've also looked at the turbo's but decided to go the Exige S route, only trouble is now is I'm probably going to want more power in a year or so

Boggy

[Gooby]

It is worth noting that some dyno work was done on the R comparing air filters. It was found that many of the commonly available set ups had little or no gains and most were detrimental. The gains / losses were insignificant. 5-7bhp can just be atmospherics. It seems the ECU did not go through a learning cycle so this can be a good reason fo no significant gains.

The bottom line is that air filters should be added for the "sound/audio" gains, not power as the lotus designed set up is very good.

For a look at what has been done, view fensports website. Of course the car is a celica but the engine is the same.

Edited by Gooby on Wednesday 10th October 05:26

[zebra]

my 111r with hurricane, stage II exhaust and toyota remap delivers 160 bhp at the raod - loss of 29 bhp

zebra

[garylythgoe]

You will not gain any power unless you modify the ECU by either replacing it with a standalone, or replacing the map on the current ECU. Fact.

[tuscan_thunder]

garylythgoe said:

You will not gain any power unless you modify the ECU by either replacing it with a standalone, or replacing the map on the current ECU. Fact.

No it's not.

The ECU has a learning facility as noted by numerous Toyota tuners - if TVR can engineer a learning facility into their AJP8 then Toyota can do it with their 4 cylinder.

Granted, gains will be small and up to a threshold point but gains are possible without ECU replacement.

Edited by tuscan_thunder on Wednesday 10th October 11:17

[garylythgoe]

garylythgoe said:

You will not gain any power unless you modify the ECU by either replacing it with a standalone, or replacing the map on the current ECU. Fact.

To turn off the 'defaulting back to 189hp' feature... You will need to modify the ECU as i said above...