S60 2.4T 200bhp AFR befor and after remap

**smithy** · Monday 2nd January 2012, 00:01

Originally Posted by bomb192uk

Tell me about it, wish I had a redblock. Just found out my headgasket has gone (3rd time now)

must be doing something wrong mate never had a headgasket go on a volvo yet

**jardon** · Monday 2nd January 2012, 10:44

AFRS around stoich (14.7) or Lambda 1 are common in stock/mild turbo cars - they will run richer if component protection is required. Mapping will include running more boost and this is a useful article on fuelling - fundamental stuff. Not sure how experienced you are with this so forgive me if it's patronising.

http://www.volvoclub.org.uk/air-fuel-ratios.shtml

**fassi1** · Monday 2nd January 2012, 17:51

Originally Posted by jardon

AFRS around stoich (14.7) or Lambda 1 are common in stock/mild turbo cars - they will run richer if component protection is required. Mapping will include running more boost and this is a useful article on fuelling - fundamental stuff. Not sure how experienced you are with this so forgive me if it's patronising.

http://www.volvoclub.org.uk/air-fuel-ratios.shtml

Good job mate. This article is the answer to my question.
I specialize in LPG installation so there was no problem with understanding this article, very useful.
Most of the cars i met run with lambda a lot less than 0.9 (0.8 or even 0.7) so what i've experianced with 2.4T (LPT) whas not what i was expecting.
When i tune LPG conversion i always do it to the same lambda or AFR as on the petrol.
When i unpluged MAF, AFR droped down to even 10.8 so it was the reason of component protection.
You've done a really god job mate, many thanks.

**fassi1** · Tuesday 3rd January 2012, 13:33

Got the confirmation from HLM Hamish and they run with lambda 0.9-1
and booked in for tuning this saturday.
Interested whats gonna look like after tuning????
Cant wait.

**MattM** · Tuesday 3rd January 2012, 13:47

Enjoy mate

let us know how you get on.

**smithy** · Tuesday 3rd January 2012, 13:47

Originally Posted by fassi1

Got the confirmation from HLM Hamish and they run with lambda 0.9-1
and booked in for tuning this saturday.
Interested whats gonna look like after tuning????
Cant wait.

weldone you wont be disappointed mate say hi from me smithy he knows quite well

**fassi1** · Tuesday 3rd January 2012, 14:02

Yeah, i will say.
Very very interested how is it gonna perform on lpg.
At the moment i cant feel any differance between petrol and lpg.

**fassi1** · Saturday 7th January 2012, 19:10

Hi everyone.
Some new boost been achieved on my 2.4T and from standard 1.31bar reached max 1.72bar.
Running full boost and max 6200rpm on lpg without noticeable power difference.

Very satisfied from car performance and HLM service.

**smithy** · Saturday 7th January 2012, 19:16

a nice 50 whp there mate and alot more talk but i think the boost levels you are talking about are abit conserative lol

**fassi1** · Saturday 7th January 2012, 19:26

That"s with standard air induction.
Maybe could achieve slightly better result with custom cold air induction?
What do u reckon?

**T5frankie** · Saturday 7th January 2012, 19:31

Originally Posted by fassi1

Hi everyone.
Some new boost been achieved on my 2.4T and from standard 1.31bar reached max 1.72bar.
Running full boost and max 6200rpm on lpg without noticeable power difference.

Very satisfied from car performance and HLM service.

your car didnt boost at 1.31 mate and wont be 1.72 now
maybe 0.31 and 0.72

**smithy** · Saturday 7th January 2012, 19:35

Originally Posted by fassi1

That"s with standard air induction.
Maybe could achieve slightly better result with custom cold air induction?
What do u reckon?

i recon an exhaust and racecat would be better mate but the cone filters do sound nice though even though a panel performance filter will do fine mate

**fassi1** · Saturday 7th January 2012, 19:37

MAP befor 1.31bar, after 1.72bar
Everyone knows what does LPT can do.

**T5frankie** · Saturday 7th January 2012, 19:39

Originally Posted by fassi1

MAP befor 1.31bar, after 1.72bar
Everyone knows what does LPT can do.

a low pressure turbo does not boost at 1.31 bar mate thats 19 psi the clue is in the name low pressure a t5 standard is only 0.8 bar which is a high pressure turbo, 1.72 bar = 25 psi

**Al115** · Saturday 7th January 2012, 19:40

Nice result, but suggest you edit your post above to remove a reference to the speed you were doing on a particular public road.

**Pinup_gal** · Saturday 7th January 2012, 19:44

Guys can we refrain from posting about speeding on public roads/highways.

**T5frankie** · Saturday 7th January 2012, 19:46

Originally Posted by Pinup_gal

Guys can we refrain from posting about speeding on public roads/highways.

can we? lol

**Santa** · Saturday 7th January 2012, 19:49

Originally Posted by t5frankie

can we? lol

Yep, you can ;-)

**fassi1** · Saturday 7th January 2012, 19:51

Originally Posted by t5frankie

a low pressure turbo does not boost at 1.31 bar mate thats 19 psi the clue is in the name low pressure a t5 standard is only 0.8 bar which is a high pressure turbo, 1.72 bar = 25 psi

The max MAP value on NA engines is 1bar so on turbo engines max MAP is >1bar
following that im not wrong.
I agree that extra boost i got before was 0.31bar and after 0.72.

**T5frankie** · Saturday 7th January 2012, 19:51

Originally Posted by Santa

Yep, you can ;-)

no i did 71 the other day (in a 30 lol) only kidding it was 80 lol

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