TorqueFlow TF500 Induction

[Mellow Yellow]

I’ve just bought a Griff fitted with the TorqueFlow TF500 induction kit. TBH I’d have preferred a standard car as I live in the South and, if anything goes wrong with it, I don’t fancy multiple trips to Cheshire to get it fixed. However, after a few hundred miles I’m very pleased with the car and the only complaint I’d have with the TF500 system is that it seems to significantly reduce the amount of noise. It’s not easy to put my finger on it but, I’d say it has the same volume as a standard car but for a far narrower rev range, outside of which it’s much smoother and quieter. Driving through the narrow streets of Petworth on the way back from Goodwoods Supercar Sunday I felt embarrassingly quiet in the company of 450SE and Tuscan. It’s certainly much happier at slow speed lower revs than other Griffs I’ve driven.

On the plus side, I picked up the car from “up North”, dropped straight onto the motorway and did just shy of 240 miles nearly all at typical, rather than fast, motorway speed. Probably 30 miles of 50mph roadworks in that. When I brimmed the tank it took exactly 8 gallons, that equates to 29.75mpg! It also seesm to gives a healthy extra bit of grunt at around 4000rpm which I’ve not noticed in other Griffs.

Are any other owners with TF Induction able to tell me if the economy and noise are typical?

[blitzracing]

You cant fundimentally change the fuelling on a catalyst fitted car- whatever you do with the AFM, the ECU will still control the fueling to run at lambda 1 below 3400 RPM- so 90% of the time. So if you are getting better then avarage MPG, it more likely to be down to the engine being in good condition, and the ignition timing being correct. Having said that you do however have the option on the TF to tweek the AFM output to match the ECU mapping,(which is done on each unit fitted) so it means the ECU has to do less correction if the origional mapping did not suit the engine -so basically the reverse of what Mark Adams does to make the map suit the engine- but its a horribly analogue process with lots of variable resistors, so if its working for you- best left untouched.