The Capristo on my Testarossa sounds same as OEM

that sounds very off. even at high revs?

 

If you have both precats and cats still in place (or maybe even precats that have broken up internally and are blocking things up) = yes, it probably will still be pretty muted.

 

Gotta see if your precats are partially melted.

 

I don’t have cats nor precats and I had an Ansa exhaust before and now a Capristo level 3 and the sound is WAAAY louder than the Ansa (and the Ansa was already louder than stock) so yes most likely you have your precats clogged.

 

You've got the cart before the horse. It will come to life once you get rid of both the cats and pre cats.

 

I have the electric valved Capristo exhaust, and when fully opened up sound mega and I have cats removed

 

Along the same conversation, can someone tell me why the Tubi exhausts have a different design for cat and non cat? If you have a California car with a Tubi exhaust can you pull the cats off and find some kind of pipe to take its place?

 

Because on a TR there are different length headers for the TR that came "without catalytic converter" and those that came "with catalytic converter".. Look at the two exhaust systems in any? TR SPC -- not only are the headers different, virtually everything else is too.

On the "with catalytic converter TR", there are F bypass pipe available for replacing the precats (and aftermarket versions), but you'd need something aftermarket to replace the cats -- but you'd still buy the Tubi "for cat".

 

Better to remove the precats so that you can look into the inlet side as well -- however (if you don't need to be strictly legal) they should either be "cleaned out" completely or replaced with precat bypass pipes IMO. (If they are still intact and OK, might be best to get the precat bypass pipes so that a still-intact precat can be sold/preserved.)

Too loud or not loud enough is subjective, but I preferred an exhaust configuration of bypassed (or cleaned out) preacts + cats + Tubi. In this configuration, the thermocouples need to be moved to the exit side of the cats. Doesn't make sense to me to have intact precats + bypassed cats + Tubi.

 

My 91 came with a Capristo Exhaust. No way a stock exhaust is that loud. No sneaking out of the Neiborhood in the TR! I have been forbidden to remove it by the wife who loves the gurgle it makes when you de-accelerate.

 

Do you have intact precats and intact cats? My guess would be "no" .

 

loud pipes save lives

 

My UK Testarossa with no cats and a stage 3 Capristo is full on 80's F1 - Ear plugs on a long run - its amazing!!

 

Funny. I don't know. But I am guessing that you are right.

 

This is always the problem when talking about, or trying to compare, the sound of the various manufacturers silencers/mufflers on TR -- very dependent on what's between the header exits and the silencer/muffler inlets.

 

Was reported on this forum that pre-cats are bad for performance?

 

Any extra obstruction in the exhaust flow path is technically bad for performance, but doubtful that anyone could detect it with their butt-dyno, and, if you were operating in a way that you noticed a performance difference = you'd probably be in jail . IMO, one significant downside is the location of "hot" precats being sort of under/next to the powerplant. Of course, if the precat catalytic structure has melted, or broken up, that's a bigger problem (and that does happen). The precats were a (desperate?) afterthought to minimize cold-startup emissions more quickly. When the engine is up to operating temperature, the main cats work just fine.

(Anyone who has ever used a private jet - even one time -- has released far more "pollution" than a TR without precats will release over its whole lifetime vs a TR with precats.)