Discussion
You really only have a need to upgrade if you can prove the origional fuel map is so far out its either limiting your power output, or making the car hard to drive. A rolling road session would be needed for accurate measurement to measure the mixture at full load. The addition of a variable fuel pressure regulator can provide some nice mixture trimming, for much less than some aftermarket chips. TVR have already upgraded the chip, and unless you have significantly altered the engine theres not much point. Having said that I think there has been some further development work done on the bigger engines to improve the airflow scaling by TVR power, best speak to them on that one. An upgrade chip wont suddenly liberate an extra 20 hp !
Mark
Mark
why does rpi try to talk you in to the ecu chip every time you call them .they said a 15%increase fuel economy and explained tvr did not spend enough money and time developing the chip .they explained the engine runs to rich on the standard chip , allso it gets rid of that petrol smell on start up and lifts the rev range .i would go for the chip but i think mark adams is making to much money , they should be around £80 not £400.why is he the only one in the country who can re chip these engines ? there must be some one else who can do it .i was adviced to have a full rolling road session £600 to £800 .its a joke what an easy way to rip us off .
You can't expect someone to travel to a client site, spend a day with you giving you the benefit of their expertise (on which their livelihood is based) and then deliver an enhanced solution to your problem for £80. A plumber wouldn't would he?
Anyway TVR Power do off the shelf chips for £80 or so the last time I enquired, so you could give them a call and see what they say.
Anyway TVR Power do off the shelf chips for £80 or so the last time I enquired, so you could give them a call and see what they say.
daz the plumber said:
why does rpi try to talk you in to the ecu chip every time you call them .they said a 15%increase fuel economy and explained tvr did not spend enough money and time developing the chip .they explained the engine runs to rich on the standard chip , allso it gets rid of that petrol smell on start up and lifts the rev range .i would go for the chip but i think mark adams is making to much money , they should be around £80 not £400.why is he the only one in the country who can re chip these engines ? there must be some one else who can do it .i was adviced to have a full rolling road session £600 to £800 .its a joke what an easy way to rip us off .
You need to read the small print on exactly what these chips do. A lot of the claims are for the Range Rover mapping and pre cat cars. As RPI sys it reduces the cold start fueling, as this is very rich, it also inceases the tickover slightly, but really you cant do b*gger all with the closed loop area. The open loop area can be tweeked with fuel pressure. Its very easy money for them, and they are really not that technical and are just trying to sell something! TVR power dont use the RPI chip, and have their own man (sub contractor) to do the programming, but you dont hear much from him.Mark
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