Racing Beat TII Exhaust as Good As They Say? Power Increase? Fitment? Noise?
 

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. :D

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. :D 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. :D

*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

hahahaha in the first link, I didn't even know the car was running until he reved it up LOL. The RB Turbo back is a no brainer, I just wish I had a Turbo II LOL

lol, jason.... just lol on first vid in the end.

I have it and I love it and I've owned several exhausts:

2.5" Bonez DP into custom 2.5" pipes into HKS Dragger: LOUD
3" SSautochrome turbo-back: LOUD
3" RB turbo-back: perfect

any exhaust that is large enough will increase the amount of boost but ONLY the RB system keeps it quiet and streetable but nice at WOT.

I can't vouch for the 59hp increase (since I had the loud, open exhausts before the RB) but I can vouch for it's noise level.

RB is a nice quiet exhaust that flows enough air for a 500 HP car. How do I know? I basically did it!

Ive got it and love it. Very good quality construction and of course it looks good.

i dont know what you guys consider quiet, but mine is quite loud, especially at WOT. The FD RB exhaust is definitely much quieter, even with a full midpipe

The 59 hp gain includes removing both cats, where a large percentage of the exhaust restriction lies. RB FTW!!!

Quick question, not meaning to hijack...

I have a large 2.5" - 3" exhaust on my car right now. My boost is set to what looks like 6-7 lbs, *which, I believe is higher than stock*...but would adding a RB to my car increase my HP or still, or has that already happened?

I've never dyno'd my car *don't know where to go for that...* and I've never driven a regular stock TII, so I can't compare.

is your wastegate ported?

That' I'm not sure of. I didn't get much info on the car when I bought it last year. It's an 88, so I figured if I was going to push 7 lbs, I'd have to have it ported. I don't have any boost creep or anything like that....so would that mean it's ported?

maybe that's why you don't see a boost spike. Do you have a boost controller? any other mods?

I don't think the RB kit will give you MORE POWER, LESS NOISE most likely.

Uhh, I don't know of any other mods that are big. I have a cone filter, no emissions, I'm not sure how they raised the boost level at all. Don't you have to keep that boost controller on there to keep the boost raised? Boy, I think I officially REALLY hijacked this thread.. SORRY OP!

well if your stock boost controller is still plugged then you'll open the wastegate at ~6.5 psi. ( can't recall stock boost on the S4's) and if it's got a ported wastegate you won't see the boost spikes that yield the HP that RB claims.

If you get a boost controller you can increase boost, get an FCD, fuel controller and maybe bigger injectors. You really shouldn't go past 10/11 psi on stock injectors. Maybe someone else can chime in and add/take away from my post.

I dont see more than 7.5psi at most with my rb. I have a ported wastegate, rtek 1.7 chipped ecu (built in FCD), 750cc secondaries injectors, walbro fuel pump.

Oh, that reminds me. I was told it's got a walbro 255, and FCD....would that help? :p

it will help deliver fuel and prevent fuel cut but you're not boosting enough to hit fuel cut yet.

isnt the stock fuel cut @ 8psi for S4?

When does boost creep start to hit for s4 without a ported wastegate? I'm wondering if it was done *though I really doubt it, would be a good thing to know, haha*

you don't hit fuel cut because you're not increasing boost. IF your wg isn't ported than you hit 10+ psi which is ~1.4psi. past fuel cut and you NEED the FCD. IF your WG is ported than it's opening at the stock psi and you won't see any spikes. You have a boost controller?

I'm not 100% sure if I do or not...I've not seen one, but then again I have never seen one before. I figure I'd see it plain as day, though if I looked in my engine bay. Are they big and noticeable by the turbo?

One year old thread and still kickin-

I'm a simpleton and a newbie, so please use small words-

If I install the RB Rev II 3" complete kit, downpipe-to-mufflers, on a fairly stock S5 1990 TII, is the RB FCD the only other mod I'd need?

Or is a new fuel pump required?
Porting of wastegate required? (and if so, how hard is that?)
New Injectors required?
Anything else?

Airpump/acv is removed, K&N filter on intake, calm driving to and from work with occasional "off the line" high revs or passing situations.

Thanks for any help in my exhaust planning-
steve

For the car's safety/reliability port your wastegate (not real hard, but takes some time under to pull the turbo, remove the hot side, port, weld a bigger flap on (you should do that), clean, reinstall), upgrade your fuel pump, and upgrade at least your secondary injectors which will require some sort of intelligent fuel management. I use the Rtek 1.7, it works nicely and doesn't require tuning. I plan on eventually buying this exhaust, but it's $$$$! For now I have a custom (done myself) mostly open and larger than stock exhaust that works well enough for the moment.

So it's not a simple plug and go answer.
thanks

It's not absolutely necessary to weld a bigger washer onto the flap on s5 wastegates. The s5 has 2 ports as compared to the s4's one. Here's mine ported:

http://i159.photobucket.com/albums/t...owaxAWS185.jpg

While you're at it as an option you can polish the ports as I did:

http://i159.photobucket.com/albums/t...owaxAWS184.jpghttp://i159.photobucket.com/albums/t...owaxAWS182.jpghttp://i159.photobucket.com/albums/t...owaxAWS181.jpg