Your ideas on performance mods

The only performance mods I've used in the past are:

on my first car (Vauxhall Belmont SRi): K&N Cone filter, either 2.5" or 3" (can't remember now) Exhaust to the manifold and Splitfire spark plugs (hey - I went for the sales pitch..).  Not much but I'm convinced it made a difference.  Certainly pulled better in the top range.. and was smoother.. and LOUDER  

On my last car (Audi A4 1.9TDi 90Bhp): Chip.  Took it to 120Bhp.  Huge difference in drivable power.  Pulled in every gear right through the rev range whereas before it would die after about 3500rpm.  I would say it was better on the M'way than my 328 after the chip.  didn't lose much in fuel economy either.  Only loss was probably due to the more enthusiastic driving....

pegsta what type of 'chip' are you refering to? a 30bhp gain is massive, considering your engine only produces 90bhp stock thats 1/3 of the engines power output gained just by replacing the chip, i find this a little hard to believe, have a look on www.gmcmotorsport.co.uk and they tell you how it is, the dastek unichip is a piggyback ecu which is programmed on your car whilst its on the rollers so maximum gains can be had, pre-programmed chips arent mapped to the individual engine so i dont see how it knows to adjust what,

and GT6-M3:

Im looking at a throttle body conversion for mine, but an exhaust and manifold that is designed for your car will give you a noticable gain, providing your putting an air filter on [try a bmc enclosed carbon one there supposed to be good might have to modify it to fit tho,] more air in more bang more power = more gasses coming out the other end so the after market manifold should have a slightly larger bore in the pipes, encouraging the gasses to get out! im having one made for my 318ti, il let you know how she gets on

i still cant see anyone getting 30bhp for £225 ish,when tested by gmc the majority of them showed a loss when tested correctly on the rr,and i believe this,they do enable your car to rev higher but low down power is what you want!

cheers

Pegsta wrote: edit - Just had a quick look at ccctech.  Site doesn't appear to be there anymore.  Either that or it's just down at the moment.  D'oh.

It's because it's http://www.ccctech.co.uk/ matey and not .com

I might have a look at what they can do for my audi

Must admit I've always been a bit sceptical about these 30bhp chip mods. Seems to me that if the manufacturer didn't want it to make the 30bhp, there was a reason.

Having said that, glad to see no one sighted the examples of ebay resistor "chips" etc as having any beneficial effect!

Does anybody do a throttle body conversion for the E30 325, or am I going to have to make my own?

Good GOD! That's nuts!

Think I'll make my own when I finally get around to it!

I got an extra 28+bhp when i chipped my last car a Fiat coupe Turbo , and that chip only cost me £100, certianlly one of the cheapest performance mods around for turbo cars no matter what fuel they use.

Haigys.Hog wrote: Phil-D, do you have the dyno sheets you could post, where was the work carried out? again 28bhp for £100 i find extremely hard to believe, if it was that cheap to make 28 extra we would all be driving fire breathing monsters! check out the website i posted in one of my last threads, and youl find you have been blinded by bull****,gmc tell it as it is,changing the inlet manifold now theres a worthy modification

28 bhp from a chip on a turbocharged car is quite believeable, especially since it has 220bhp as standard anyway. Thats only a 13% increase. Chips are an effective and cheap way of liberating more power from turbocharged petrol and diesel cars.

All the chip did to my old fiat was adjust the fueling and boost , instead of boosting at 1 bar i got a max boost of 1.3 bar that used to over boost to 1.6 bar, i then removed the ecu's control of the boost as it was too erratic and put in a manual boost controller which i set to 1.3 bar sustained boost. The chip in this case was made by a company called Novitec (Italian tuning company) who were having a special offer on them when i bought it, i did however change it to another chip which was made by a guy in the Fiat coupe Club which cost me twenty quid (£20) and it was better than the novitec as he had altered the fueling, all this messing about with chips and boost controllers brought the car from 220 hp as standard to close to 270 bhp all for the price of a couple of nights out on the town.

Chipping on turbo cars is a very easy and cheap way of extracting more power up to a certain point, then you have to start looking at hybrid turbo's , larger inter-coolers , water injection etc.......