The cats are in! So is the tubi

Okay, I'm pleased to report that I have completed installing my Tubi and the hyper flow cats on the 360. Many thanks to Lou at Tubi and the guys at T. Rutlands for the Tubi. Also to Kevin at MVP for the cats and to Troy at hyper-flow.com for his follow up calls.. all you guys were great and the customer support, etc. was awesome.

I did the job myself and it took about 15 hours. It would have been less (maybe 3 or 4 hours less), but I ran into a few problems with adjustments and clamping problems. Re-aligning the rear bumper perfectly was a pain.

The clamps between the Tubi and the hyper flow cats gave me some problems. I think if I had been using the stock cats, it would have not been an issue, but because the hyper flow cats and the tubi were both highly polished, the clamps had a difficult time working (although once everything heated up, I think it sealed up more). It's a long story; one I don't want to re-live - just let me say it's best to install the clamps with the screws facing up, not down, as you aren't always going to have that rear bumper off!

I'll attach a few photos here.

Getting the proper alignment on the tail pipes was a trick also - and that's a polite way to put it. I ended up having to wedge some wood on the left side, then once it was set correctly, I re-tightened everything down. That did the trick. Getting the cats on can be a little bit of a hassle, but you can work via the wheel wells if you don't feel like taking the bottom areo panel off the car.

Here is a break down of the weight on everything.

STOCK:
--------------------------------------------
Exhaust canister - 52.5 lbs
Exhaust tips - 8.5 each (17 lbs total)
Factory Cats - 13.25 each (26.5 lbs total)
Total weight of factory system = 96.0 lbs

TUBI and HYPER FLOW CATS:
--------------------------------------------
Exhaust canister - 40.0 lbs
Exhaust tips - 13.25 lbs (total)
Hyper Flow cats - 6.5 lbs each (13 lbs total)
Total weight of Tubi & hyper flow system = 66.25 lbs

Total weight savings = 29.75 lbs

The sound is amazing. Sort of sounds like a cross between an F1 car and a helicopter. It's a hair louder than I was hoping for at idle, but I'll live. The people who live around me might not like it rattling their windows, but if you want absolute quiet, buy a farm. I noticed it set off a car alarm the other day when I was going down the block! There is a bit of a resonance at 2500 to 3000 which is a touch annoying, but again, nothing you can't live with. Once you get rolling, it's fine and goes away. The sound is as good, although different, than my 355 with a tubi and stock cats. The 360 now has more of a powerful sound and there are no more valves to open up, so the exhaust note is constant as you accelerate. The car sounds great compared to stock. It has an amazing exhaust note. When you decelerate, there is a little bit of a burble, but not too much.

HP gains.. no way to know unless I put it on a dyno. I'm going to guess 20 or so mid-range based on what I've been told and maybe 10 at top end. From what I understand the cats add more power mid-range, as compared to top end. I don't know how much the Tubi and cats together add, maybe it's 20 maybe it's 30. I really would only be guessing. I believe I have heard 15 or 20 on the Tubi from customers who have dyno'd it and reported back to Tubi, so 30 for both seems pretty reasonable in the mid range.

It seems like there is more heat in the engine compartment. The cats have already turned a cool blue/golden color. The tubi looks great sitting in there as well. I have the challenge grill, but still, it seems a bit hotter when I get back from a drive.

I'll get some more photos when I have a chance. In the meantime, here are some from installing it. I'll also see if I can get an audio or video clip happening in the near future. The sound is something else!

Ray
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btw, I meant to mention that the car was too low to get the jacks under it. So what I ended up doing was driving the rear wheels up onto a a couple of pine 2x10's. That lifted it up just enough so that I could get the jacks under both sides. I had to cut little wood square also to fit in the wholes where the jack goes. Then I just went back and forth jacking the car up a little on each side.

 

I just get a kick out of doing the work myself. I used to build motors and modify cars when I was younger.. 360 is just a real fancy Datsun if you ask me

it's rewarding to do the work yourself and become more familiar with the car.

Ray

 

Rev off idle is a little quicker. Seems like there is a little smoother take away from a stop. Power is good.. it's difficult to tell if there is more power. Sound is great.

 

I believe Tubi mentioned some customers had dyno'd their cars and saw a 15 or 20 HP gain. Hard to say without doing a run before/after yourself. I tend to believe Tubi knows what they are doing when it comes to building exhausts.

 

hard to say, I haven't driven the car all that much since the install or really had a chance to open it up. On the 355, it was easier to notice, since I had driven the car a lot previously, then install the Tubi and drove a lot from there.

 

I find it hard to believe a louder exhaust means less power.. just based on the fact that if more noise is getting through, it probably means it flows more freely. In any event, I'm just passing along what Tubi says. I have no dyno sheets either way.

Ray

 

The Tubi is a little ligher than the stock (as outlined above) - when I removed everything, I used a shipping scale to weigh the light parts and a regular scale to weigh the cans.

I don't have dyno sheets, nor am I putting my car on a dyno to find out. Tubi stated that several of their customers had installed Tubi exhausts and gained 15 or 20 HP (if I recall the #'s correctly). I think they indicated 3 customers had reported back. So it's difficult to say. I don't believe ferrari is known for their exhaust systems. Tubi (from what I am told) works closely with Ferrari. The 355 tubi I had did seem to make the car a little more snappy through the gears. As far as the 360, I couldn't tell you either way.

I agree that the Cats probably are the 'weak link' in the exhaust system and upgrading those is money well spent. The hyper flow cats are really a work of art and I like how light they are compared to stock. They look great in there and I bet they do improve the flow quite a bit.

If anyone has a photo of a Tubi cut open, I'd be interested to see it. I still have the stock exhaust.. maybe I'll fire up the die-grinder next time I have a minute and open up the stock exhaust and grab some photos.

I'll tell ya one thing for sure... those Harmony headers are bad-fing-ass!

Ray

 

In going over some of the old posts regarding the 360 and dyno results (specifically the couple included here), I think you can get a good feeling for how things sort out as far as a stock 360 vs. a 360 with a tubi and hyper flow cats. From this posting:

http://www.ferrarichat.com/forum/showthread.php?p=4421

It appears that you can draw a few conclusions (yes, sure, this isn't as good as running a dyno yourself, each time you adjust the car, but it's all I have at the moment . First, the drop in HP due to the drivetrain on the 360 appears to be some place around the 20% to 23% range. That seems to be a pretty reasonable figured from what I have read and know about dynos. We are going to have to go with it, unless someone wants to pull their motor and rig it up to a dyno

In his posting, Heiko notes that the stock 360 dyno results come in around 307HP at the rear wheels. Heiko is a stand up guy, so I have no reason to doubt his numbers. This also confirms a roughly 23% drive train drop, since if you extrapolate back 307HP based on a 23% loss through the gears, you arrive back at approximately 399HP for the stock 360 at the flywheel.

Okay, so using this post below:

http://www.ferrarichat.com/forum/showthread.php?t=106437

It appears Hubert has included a dyno result of a stock 360 equipped with a Tubi, K&N filters and capristo silenced pipes. I'm guessing the silenced pipes replace the factory cats, but I'm not sure. My guess is they are straight pipes with a glass-pack affair built in? Maybe Hubert can confirm what he had in there prior to the TT.

In any event, his pre-twin turbo dyno sheet for that configuration shows about 333HP at the rear wheels with the Tubi and pipes. Before you ask, no I don't know the temp diff between where Hubert lives and where Heiko lives, nor do I know the different in elevation. I also don't know if either of the dyno operators had just finished smoking crack the night before...

Be that as it may, if you use the 23% loss figure on the 333HP that Hubert shows (at the wheels), then it extrapolates back to a HP reading of approximately 432HP (at the flywheel). That's about an 8% increase on account of the Tubi and removal of the cats.

Anyway, while it's not a true dyno run, it's at least some estimates based on what other people have posted. Naturally, it would be great to hear from Hubert and/or Heiko on this posting - but I think my logic is pretty sound.

Ray

 

All good points. In speaking with Troy at hyper flow, I believe he indicated that the cats add 15 or 20 HP (can't remember now which he said) in the mid-range and about 8 HP at the top end. The mid-range is where it really helps the most, since that is where you are all the time. Like you say, top end HP is great, but for the breif moments I'm at 8500 RPM I would rather see some HP gains lower down.

I'm going to try and get a little video clip of the car going through the tunnel or something.

Ray