and i was looking at the rev t2 exhaust. Can anyone give me any details on it?
Is it as good as it claims to be? Is it really that much HP gain?

 

Yes. When you free up the exhaust it causes boost to climb, which will net you more power. With the new exhaust you'll need an FCD and possibly bigger injectors and at the least a piggy back fuel computer, to control the bigger injectors.

Search FCD and boost creep. You will find more information.

James

 

Thanks for the info

 

so your saying that the exhaust will actually produce 59hp ???????????
i have troubles believing that.
beside raising the boost, bigger injectors wont change nothin at that moment, if he hasnt upgraded is fuel pump and a computer upgrade (like the rtek v2.0).
so i doubt that there actually an increase of 59hp.

 

if you're looking for a quiet exhaust, this is the one. if you want those loud firecracker types that you can hear from blocks away, this isn't...

 

I have the racing beat 3". I do believe the 59 horse gain. (W/ some sore of FCD)

Stock is 184 HP @ the fly. Minus 15% to the wheel which is 150 HP.
150 + 59 = 209 HP
I dynoed 210 RWHP w/ the 3" turbo back system.

 

My 88 T2 came to me bone stock except for no airpump and an upgraded clutch.
The first upgrade I did was the Racingbeat REV TII exhaust. Expensive? yes but worth every dime. Combined with the fuel cut defender and K&N cone filter it was like driving a totaly different car. Boost WAY up over S4 stock without porting wastegate.
You WILL need to port the stock wastegate to keep boost at safe level.
While I can't tell you dyno numbers I will say without a doubt power was a hell of a lot higher than stock. So believe it will make a large difference.

I've since upgraded to an S5/BNR stage 2 turbo, 750s all around and Rtek 1.8.
Now its faster still.

 

Great thread! Question: Is it pretty safe to race a S5 turbo where the only modifications are a Racing Beat 3 inch system BUT with a high-flow catalyst, a K&N cone air filter, a FCD and a better fuel pump? I understand that the S5 turbo has a bigger wastegate and don't need porting. Anyway, these are the only engine modifications that are allowed in the racing class I am aiming for... So, no porting, no piggy-back, no big injectors...

 

Believe it...

Most "stock" Turbo II's put down about 160 at the wheels.
With the exhuast, these cars will not put down about 220 at the wheels.


-Ted

 

this exhaust is by far the best thing to do to upgrade a stock t2. I use this with a Rtec controller, It alows me to adjust my fuel and i have no need for a FCD with it.

 

i have an s5 with tII swap, only mods are hks filter, RB 3inch from turbo back which is straight pipe, and walboro 255.....and this car pulls HARD bc now boost is at 10-11psi with the exhaust put on, so yeah 59hp is easily achieved.

 

That's not quit true,if you could hold the stock boost with the RB exhaust it would be a minimal increase.Racing beat claims that because the boost creeps wildly,and if I'm not mistaken actually printed it in bold letters in their catalog that you also need the FCD.I bet in the late eighties and early 90's that exhaust and their FCD was an engine builders/mazda reman's business booster.

 

Show me a full, turbo-back exhaust system that doesn't raise the boost levels, and I'll eat my words.

In fact, this applies to all turbo engines, so assuming the boost levels stay the same before-and-after is just plain dumb.


-Ted

 

Although, assuming you could actually control the boost on a stock car and keep it low...it would be interesting to do a before/after RB exhaust. So you could see if there was any change in hp/tq at the same stock boost levels.

Maybe it would be better because the turbo would spool up sooner due to less restriction in the exhaust?

James

 

i have it, its way too quite but if you like to hear your turbo spool every second like i do then its great. in fact all you hear is the turbo

 

If you reread my post,nobody's arguing your post.OK?

 

Bought the whole RB setup. Good quality construction. Very quiet! Easy install! And I agree you will hear the turbo not the exhaust

Hp- I noticed a lot more power

 

I have it. The car rips.

 

LoL! So true, and even more true if you have an upgraded Turbo with an anti-surge compressor housing. With my anti-surge 500r the sound of the turbo greatly outweighs the sound of the exhaust. The car just screams down the road until it passes you then you hear the exhaust.

*edit*
RB has dyno proven the 59HP increase with a stock car. Its a no brainer. Getting rid of the exhaust restrictions will allow the turbo to spool up sooner and the boost will raise a few psi.

 

Ted and guys, the 59hp gain is on a Kouki or Zenki?
Ted from 160whp to 220, Zenki?
Thx
Matthieu

 

I will have to jump on the bandwangon here. I have the Rev TII 3" system (downpipe, presilencer, y-pipe, and mufflers) on my S5 TII and I love it. It's quiet at idle and cruise speeds around town and on the autobahn it has a great tone at WOT. And yes....there is definatly a power gain, no question.

 

Yes, any big exhaust will give you that kind of power. It's because the wastegates on these cars are very restrictive, and the open exhaust will let the turbo spool well over stock boost, producing the power. This can be good or bad, depending on your fueling.....

 

It's SO QUIET in my opinion, but that is good. When cruising 35-40mph, all I could hear is the sound of the tires on the pavement over my motor. I had to look at the tach to remind myself that the motor was still running.

I put this exhaust on along with porting the waste gate and my car ran like a champ. It made a difference and I loved it.

 

Everybody with this exhaust needs to post some sound clips, they're kinda scarce.

 

http://www.youtube.com/watch?v=tV--m-sid-I
http://www.youtube.com/watch?v=WBMDXkyHViE