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Old 21-01-08
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147 Gta Chip

Hi all first post so please be nice....

I have a 53 plate 147 GTA with 25k and was thinking of chipping the car, was just wondering if any of you guys had any experiance with this, eg good points bad points. I was talking to the guy from angel tuning he said he gets 18hp increase and about the same in torque but he said it increases the rev limit by 500rpm, which to be honest i think the car needs this as i am always hitting the rev limiter as the car stills pulls like hell...

Any advice...

MIke
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Old 21-01-08
newalfisti
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Re: 147 Gta Chip

Originally Posted by mickyt10 View Post
Hi all first post so please be nice....

I have a 53 plate 147 GTA with 25k and was thinking of chipping the car, was just wondering if any of you guys had any experiance with this, eg good points bad points. I was talking to the guy from angel tuning he said he gets 18hp increase and about the same in torque but he said it increases the rev limit by 500rpm, which to be honest i think the car needs this as i am always hitting the rev limiter as the car stills pulls like hell...

Any advice...

MIke
I would leave it as is to be honest. I'm not very keen on remaps especially ones that have been done not on a Dyno as you are in danger of having extremely high cyliner pressures that can eventually destroy your engine.
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Old 21-01-08
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Re: 147 Gta Chip

Mine was remapped by Angel Tuning by the previous owner on here (Troll). Cant compare before/after, but if he's around he'll offer his opinions.

I'd stick to the well known ones though - Angel Tuning and Autodelta.
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Old 21-01-08
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Re: 147 Gta Chip

Does everything seem ok with the car, has it upped your limiter, what about fuel consumption...Mike
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Old 22-01-08
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Re: 147 Gta Chip

Only heard good things on here about Red Dot in Watford, although there was me thinking an 18 bhp increase was overly optimistic, they have a graph boasting 272...

ebay offer
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Old 22-01-08
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Re: 147 Gta Chip

Originally Posted by newalfisti View Post
I would leave it as is to be honest. I'm not very keen on remaps especially ones that have been done not on a Dyno as you are in danger of having extremely high cyliner pressures that can eventually destroy your engine.
Inclined to agree with leaving it, if it ain't broke... but extremely high cylinder pressures, sounds ominous, can you elaborate a little on that?
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Old 22-01-08
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Re: 147 Gta Chip

Originally Posted by Caldo Bollente View Post
Only heard good things on here about Red Dot in Watford, although there was me thinking an 18 bhp increase was overly optimistic, they have a graph boasting 272...

ebay offer
Damn that is tempting!
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Old 22-01-08
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Re: 147 Gta Chip

Originally Posted by EddieGTA View Post
Damn that is tempting!
3 days, 22 hours and counting...


They've had this promo running before, whether they will again? You know being a club member you can get 10% off normally, probably cheaper than the stated £450 also, pm OperationAlfa for details.
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Old 22-01-08
newalfisti
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Re: 147 Gta Chip

Originally Posted by Caldo Bollente View Post
Inclined to agree with leaving it, if it ain't broke... but extremely high cylinder pressures, sounds ominous, can you elaborate a little on that?
Of course i can elaborate.
You see when engines are mapped during their development phase they are mapped according to cylinder pressure and detonation. Every engine can withstand a certain amount of combustion pressure depending to its specification and design. Therefore the engines are mapped on an engine dyno by using an in-cyliner pressure transducer(sometimes this is a special sparkplug) which allows the development engineer to determine what the best ignition timing settings are over a range of different load and different RPM by looking at the cylinder pressure values. In the engineering world there is an ideal ignition timing value for every mapping point which is called MBT timing(Maximum brake torque) this is the timing value that gives the highest torque output, usually the manufacturers try to map a little retarded ignition timing from MBT but as close as possible. If you go more advanced than MBT then you might gain a tiny bit in power but due to the A/F mixture igniting before TDC the combustion pressure can go sky high for example for a 3NM increase in torque you can get 10/20 bar pressure increase which will put some serious strain on the engine and it could also start to detonate. So what i want to say is that without cylinder pressure measurement equipment that cost about 500grand you cannot do this job properly as you have to do the job only by reading the dyno figures(that is if you use one) and then depending on the tuner you can get different results. Some tuners try to find MBT and then they map 2-3 degrees retarded(thats not a bad practice) some have absolutely no idea of what i just explained.
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Old 22-01-08
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Re: 147 Gta Chip

Starting to wonder if its worth it now, but i have always chipped my other cars, turbo ones too, with no probs. So when a manafacture has one engine with two different power outputs is one just simply chipped or mapped differently anyway...Mike
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Old 22-01-08
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Re: 147 Gta Chip

Remaps are obviously going to have an effect on engine life, but if you think about how many cars out there are remapped, if there was some serious problem doing it, you'd have known about it by now.

As for manufacturers mapping at the factory...don't think its quite that simple. The VAG 1.8T comes in 150, 180, 210 and 225 bhp 'flavours' from the factory, but there are some differences in the actual engine components - certainly the 225bhp, which is the popular one amongst the 'converters'
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