Vehicle & Technical > Discovery
TD5 Chip - Anyone done one?
landyman Ash:
Has anyone donw a chip?
Any companies you've bought one from???
Eeyore:
I have experience of several JE Engineering chip 'enhancements'. 180bhp in a TD5 90 (with appropriate intercooler and plumbing upgrades) was quite something.
Not cheap, but it seems to work without overfuelling.
Costs a fortune in rear drive members.......... :shock:
cheers
8)
Eeyore
landyman Ash:
Thats great, I'll give them a call and get some advice.
I'll buy some half shafts too ;)
thermidorthelobster:
Tried Superchips, van Aaken, Autologic. CBA to go into the detail but I settled on the Autologic! One question I would ask is, what parameters is the chip actually modifying; some chips just change the injector pulse length, which is a very simplistic way of looking at things, whilst others take a lot more control over what's going on.
I have a spreadsheet which compares the "before" and "after" curves on lots of different chips from the manufacturer's data, if anybody wants a copy I'll dig it out. One interesting thing is that the "after" curves on some chips are smaller than the "before" curves on others, which suggests to me that the dynamo operators' data is essentially worthless; also below 1,000rpm the torque curves and power curves behave in a way which breaks the laws of physics, but who am I to criticise the dynamos.
Finally, beware of a couple of chippers who give you oodles of performance at the expense of your exhaust manifolds, which are virtually guaranteed to warp and need repair/replacement quite frequently. There was one in particular which used to come up all the time on Usenet.
By the way, I'm talking Disco TD5 here, but although there are minor differences with the Defender it's essentially the same argument. My torque curve comparison has some of each.
thermidorthelobster:
Ah, here's my spreadsheet:
http://www.lobsternet.org/discoveryii/perf.xls
David
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