[tomato]

I just spent some good time under my new truck and noticed a couple of interesting things. Maybe someone out there has some answers...

Why 4 catalytics? I'm in CA, so it would be tough for me to eliminate any.

What the heck is that large black box with tubes and wires located inside the frame, between the front and rear doors???

They split the darn drive shaft! There is a CV joint bringing 2 sections together. A big power-robber

 

[Hamrhead]

I just spent some good time under my new truck and noticed a couple of interesting things. Maybe someone out there has some answers...

Why 4 catalytics? I'm in CA, so it would be tough for me to eliminate any.

Manufacturers have been doing this for years, 4 clean better than 2. Obviously, it has to do with 'cleaner' exhaust emissions, but I think the forward cats heat up faster, therefore start cleaning the exhaust sooner.

I have no idea if eliminating the rear cats would affect emissions, but I'd like to know if anyone has done it, and PASSED a smog test since??

 

[SNCBOOM]

Yep, the ol' lightning has 4 as well

 

[Rainman15]

Yep, the ol' lightning has 4 as well

I removed my back two which they refer to as resonators not converters and still passed E-test in Ohio (sort of). I'm not sure how much different the CA emissions test is but they take a mirror and inspect the entire pipe here in Ohio. Even though I passed the pipe check they failed me because part of the ystem had obviously been replaced with pipe so I had to re-register the truck back in my old home town in SC where they don't have emissions checks. Big time PITA!

 

[alextaylor29]

I'm curious as well. Why the two part drive shaft? That's a bit unique? My guess is that is has something to do with the massive HP and TQ the V10 generates.

Was watching a thing on Speed last week where Leno was building a 1,000 TT car and they installed a one piece carbon fiber drive shaft!

 

[Hamrhead]

I'm curious as well. Why the two part drive shaft? That's a bit unique? My guess is that is has something to do with the massive HP and TQ the V10 generates.

Doubt it has anything to do with the V10's power. There are many vehicles, both cars and trucks, easily making twice the power (and beyone ) and using a single shaft.

It's got to be length. Maybe something to do with the U-Joints on too much of an angle, I'm not sure?

If I'm not mistaken, the Ford Harley Davidson Super Crew, with the DE-Tuned Lightning engine, also had a two-piece shaft.

 

[9 seconds]

You're probably right about the pinion angle. The QC isn't lowered.

 

[B.Exxon]

i agree with hammerhead i see alot of vehicles with 2 piece driveshafts usally trucks

 

[Wikdsvt]

correct me if I'm wrong,

but in california you don't need to hbe tested for emissions until the car is 4 years old.

That is why all the ricers buy new cars and immediate mod them. once they hit the age when they need emission testing, they sell it out of state.