Hi All.

Can anyone tell me why the auto tt makes 280 bhp and the manual makes

300. what is the technical reason for this? does it make any difference

when tuning?

I'd have thought it was the other way round - aren't US regs the strictest in the world?

 

Richard :)

 

Well it won't be the Cat then so its got to be maping as they have the same tubs as UK and Jspec.

I Don't know the exact why's and wherefores but all this "well a standard Jap this is 310bhp" etc is poo because we can all find articals to vindicate or storys dependant on how biast you are. I read an artical last year in Banzi where they dyno tested peoples cars that where claiming big HP and they were all miles out. Most of the Scooby's That clained to be 550BHp were actualy more like 380bhp. They tested about Thirty different motors some of which were 20 to 30bhp down on what they were supposed to be as standard, because you just carn't bolt on any old tat and expect more. it has to be a proper tuning set up.

 

I'm sure the guys at thor will tell you what the true story is. I know this that. At billing last year the most powerful Scooby to be dyno tested was a black one. It only just topped 360 RWHP and that had bigger tubs intercoolers ECU chipped and boost controler.

 

(really does it mater if someone thinks its faster and that makes em happy)

Well it won't be the Cat then so its got to be maping as they have the same tubs as UK and Jspec.

I Don't know the exact why's and wherefores but all this "well a standard Jap this is 310bhp" etc is poo because we can all find articals to vindicate or storys dependant on how biast you are. I read an artical last year in Banzi where they dyno tested peoples cars that where claiming big HP and they were all miles out. Most of the Scooby's That clained to be 550BHp were actualy more like 380bhp. They tested about Thirty different motors some of which were 20 to 30bhp down on what they were supposed to be as standard, because you just carn't bolt on any old tat and expect more. it has to be a proper tuning set up.

 

I'm sure the guys at thor will tell you what the true story is. I know this that. At billing last year the most powerful Scooby to be dyno tested was a black one. It only just topped 360 RWHP and that had bigger tubs intercoolers ECU chipped and boost controler.

 

(really does it mater if someone thinks its faster and that makes em happy)

 

I think I agree with Mark here in that "who cares what the BHP is - if the car is fast, then that's all that matters"

 

Richard :cool:

Well it won't be the Cat then so its got to be maping as they have the same tubs as UK and Jspec.

 

The difference is actually the cam profiles. US cams accept a bit more air than the jap spec.Having said that like someoneponted out above, JDM car restricted first from the air intake box and once that is taken out the engine gains more.