Caterham R400 K-engine MBE map Help

Caterham R400 K-engine MBE map Help

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Discussion

calimerus

Original Poster:

27 posts

115 months

Tuesday 12th August 2014
quotequote all
Hi all.

I'm having some problem finding someone (here in Italy) able to map my Caterham R400

I've got a year 2003 R400 Rover K 1800 cc minister engine with roller barrels and 4-1 exhaust without cat.

Verniers fitted and 120/100 timed.

MBE 967 ecu


The original map was not so goot at low revs.. and now that i removed the cat it's even worse, the cars pops and bangs and isn't drivable.


I would really appreciate if someone can give me a suitable MBE map that i can use to make my car run good (with my setup) and eventually bring it to make a map refinement.

Thanks in advice

IBDAET

1,655 posts

262 months

Tuesday 12th August 2014
quotequote all
Have you calibrated the throttle pot properly? Poor running at low revs is a key indication this is wrong.


calimerus

Original Poster:

27 posts

115 months

Tuesday 12th August 2014
quotequote all
Yes, I've done it... but if I put it on the right load site (site 0) 0,45v , the car doest run at all.. :-///

Now the only way to use it is to "cheat" the tps putting it into load site 3!


I need a better map to put on. I think the original Caterham map can't handle retimed verniers and cat removal..

IBDAET

1,655 posts

262 months

Wednesday 13th August 2014
quotequote all
There is often lots of issues around getting the initial settings right.

Have you checked in the "throttle index map" that load site 0 is at 0.45v? It varies depending on who mapped the engine.

If this is right, you need to balance the TB's as best you can (roller barrels are hard to get perfect, so +-1 0.5 kg/hr is OK.

Then check that at idle you are drawing around 5kg/hr through each throttle body with the TPS at the value for load site zero in the throttle index map.

If you have a wide band lambda, check that idle AFR is around 13:1.

If this does not fix it, try a new TPS. They can look fine on the PC and give loads fo trouble in use.

I strongly doubt it needs remapping - its normally just calibration issues.

Mellow7

219 posts

187 months

Wednesday 13th August 2014
quotequote all
Are your HT leads up to it? I've just changed my 13 year old ones and its been a transformation - previously low speed running (over the last 6 months or so) was rubbish.

calimerus

Original Poster:

27 posts

115 months

Wednesday 13th August 2014
quotequote all
Everything about leads and ignition is new.. the older part is one year old.

I've a new TPS, I fitted it and it gave me the same readings (so I thought the older one was good).. but i didn't drove the car with that, I should try...

I've also made a little balance of the TB'S, but I made it only without checking whit some instruments.

The story is:

The car was "perfect" (as much perfect can be an R400 with the original Caterham map), i had only problems on mountains where the engine frequently shouted off.

Than i fitted and timed vernier cam, the car became more solid on high revs.

Than i removed the catalitic converter and all became bullst... the car don't keep idle and goes even worse on high altitudes.. so I found that to make the car run, the only way was to "cheat" the TPS putting it on load site 3 instead of 0.

Than i brought the car to a "map specialist" that made a mess playing with the lambda control.. so I had to put the original map back.


Now I would like to try to put an optimized R400 map (since I know there are a lot of better map the the original one out there) to see if things goes better.



Any suggestions?

It looks strange to me that a cat removal made that mess.. but it should be, considering that i changed the cam timing (120/100 as DVA suggested to me)

IBDAET

1,655 posts

262 months

Wednesday 13th August 2014
quotequote all
OK, I just did a few moun tains in my car and it is clear the standard map is no good as the baromettric pressure drops.

There is a map in the MBE for barometric correction, but you will need to drive your car with a PC and Easimap connected up a mountain with a wide band lambda connected.

The std lambda is normally disabled in the map.

Can you email me your map and I can take a look at a few parameters - I've sent you a PM with my email address.

calimerus

Original Poster:

27 posts

115 months

Wednesday 13th August 2014
quotequote all
Thanks :-)


email sent

calimerus

Original Poster:

27 posts

115 months

Wednesday 13th August 2014
quotequote all
Anyway, talking about lambda.. do you know which kind of lambda is fitted?

I see there's a choice between LSEU3 AND LA2/3.

When i start easy map, i see in green "lambda control active" an I've also a target lambda map that i can't understand (you will see it in the file).

But if I open the lambda control choice i find : activated, deactivated and "ffh=?" that I don't know what it means.

Standard is on ffh=? and if I put to deactivated or activated, I lose the option to go back to ffh=?, really strange...

IBDAET

1,655 posts

262 months

Thursday 14th August 2014
quotequote all
Set the lambda control to deactivated. You could have a defective lambda sensor, its not uncommon.

Do youhave a synchometer and what kh/hr reading do you get on the throttle bodies at idle?


Also, at what altitude are you doing all of this?

johnvthe2nd

1,285 posts

196 months

Thursday 14th August 2014
quotequote all
I probably have pretty close to the map you need in mine .. if somebody (Arnie?) could get it out for you .. mapped without lambda, 1800K roller barrels (basically R400 VHPD 210bhp), new TPS, 4-2-1, no cat by the infamous 2 Steves
It does stall on tickover on top of the Pyrenees though

Edited by johnvthe2nd on Thursday 14th August 10:07


Edited by johnvthe2nd on Thursday 14th August 10:09

calimerus

Original Poster:

27 posts

115 months

Thursday 14th August 2014
quotequote all
I will try again with the lambda.

When I was at the shop and we putted on "deactivated", the correction started to work! It's a lot strange, if I look at that with easymap 5.5

If I open the map with easymap 4 it seems different. May be theres something wrong whit the software?

calimerus

Original Poster:

27 posts

115 months

Thursday 14th August 2014
quotequote all
John, your map is exactly what I need to try If my setup works :-)

calimerus

Original Poster:

27 posts

115 months

Thursday 14th August 2014
quotequote all
Playing with easymap I just noticed that opening an making changes on lambda control on easymap 5.5 and than opening the same map again with easymap 4, shows me different results :-OOO

May be there's something wrong with the software? (or my ecu software is older/newer than the one on easymap)

Which one I should use?

IBDAET

1,655 posts

262 months

Friday 15th August 2014
quotequote all
johnvthe2nd said:
It does stall on tickover on top of the Pyrenees though
John, I can upload it if you like. Where in Surrey are you?

IBDAET

1,655 posts

262 months

Friday 15th August 2014
quotequote all
calimerus said:
I will try again with the lambda.
No, unplug it.

calimerus said:
May be theres something wrong whit the software?
5.5 is better than 4, both are a bit buggy if you try to run them on XP or anything newer.



Its critical to get the idle set properly. I think this is where your issue is. Your map looks to be OK.

Do you have one of these?

calimerus

Original Poster:

27 posts

115 months

Friday 15th August 2014
quotequote all
.... no

What's that thing? :-)

IBDAET

1,655 posts

262 months

Friday 15th August 2014
quotequote all
OK buy yourself a Carburettor Synchrometer.

Then we will set up your throttle bodies and throttle pot properly and everything will run fine.

They are about £30 - try to avoid a really cheap Chinese one as they are not very accurate.

calimerus

Original Poster:

27 posts

115 months

Friday 15th August 2014
quotequote all
Clear !

I'll buy one.

Back from vacation I'll do the job :-)

calimerus

Original Poster:

27 posts

115 months

Friday 15th August 2014
quotequote all
Which is the right size for roller barrels?

I see there are for 48 or 50/55... or anyone is good the same?

http://www.ebay.it/sch/i.html?_trksid=p2050601.m57...

Edited by calimerus on Friday 15th August 13:52


Edited by calimerus on Friday 15th August 14:12