NEW PRODUCT! RIVA Sea-Doo Exhaust Race Plate

[1tommygunner1927]

Did you use any gasket sealer or high temp RTV on any surfaces when re-assembling the manifold or new plate?

I used a very thin layer of high temp rtv on both sides of the spacer......for piece of mind. Is it necessary? Don't know, don't care as I wanted to ensure no exhaust leaks.

[Chefrey]

Did you use any gasket sealer or high temp RTV on any surfaces when re-assembling the manifold or new plate?

I did not. According to the instructions they just want you to make sure all the surfaces are clean and torqued properly. No additional gasket/RTV needed.

[vashaunp]

I spy-..[ATTACH]489765[/ATTACH]


Picked one of these up solely for the ease of O2 sensor install. My 2016 rxt260 has a molded in water neck that is in the way where most people tap the exhaust manifold so I couldn't easily install the sensor there. Figured if I'm going to have to pull the manifold either way might as well make it easy and gain a couple rpm!

Did you use any gasket sealer or high temp RTV on any surfaces when re-assembling the manifold or new plate?

[1tommygunner1927]

I contacted Riva and they said you can add EGT logging via some additional PLX module but I'm not touching that monstrosity. It has only 2 inputs anyway.

https://www.plxdevices.com/SM-PRO-Combined-Sensor-Module-Array-p/897346002085.htm

Would be much better if MaptunerX got firmware update to support logging of custom can-bus data.

I agree, and that module doesn't appear to be water proof or resistant. Hopefully, Riva will have a better mouse trap soon.

[ptscon]

Whether the exhaust spacer adds a few rpm or not, the important fact is it is datalogging "tool", superior to drilling your exhaust manifold, if using a standalone ECU. I'm not sure Maptuner X supports EGT probes.

I contacted Riva and they said you can add EGT logging via some additional PLX module but I'm not touching that monstrosity. It has only 2 inputs anyway.

https://www.plxdevices.com/SM-PRO-Combined-Sensor-Module-Array-p/897346002085.htm

Would be much better if MaptunerX got firmware update to support logging of custom can-bus data.

[1tommygunner1927]

Yea I know they have been around awhile but I have yet to see a testimonial of, "I bolted this on and after tune adjustments and data logging I got 125 rpm and 1.5 mph". All I have heard to this point is hearsay.

I'm a facts and data kinda guy.

Whether the exhaust spacer adds a few rpm or not, the important fact is it is datalogging "tool", superior to drilling your exhaust manifold, if using a standalone ECU. I'm not sure Maptuner X supports EGT probes.

[Cagedup]

These have been used for years. I have an exhaust spacer on my RXT and gained around 100 RPM. The only thing new about this spacer is the EGT and O2 sensor ports.

Yea I know they have been around awhile but I have yet to see a testimonial of, "I bolted this on and after tune adjustments and data logging I got 125 rpm and 1.5 mph". All I have heard to this point is hearsay.

I'm a facts and data kinda guy.

[jetplane]

Very nice hull !

[GreenHulk Jr]

What RXT do you have ? S3 or new hull ?

Neither I have a 2006 RXT that has some decent mods.

[jetplane]

These have been used for years. I have an exhaust spacer on my RXT and gained around 100 RPM. The only thing new about this spacer is the EGT and O2 sensor ports.

What RXT do you have ? S3 or new hull ?

[GreenHulk Jr]

So no one has any solid results from this? I can see where you may not see much difference on a bone stock motor. But I want to try one on my RXP 300. I can see with tune adjustments where this plate couldn't do anything but help. Especially has restrictive as the stock manifolds seem to be.

These have been used for years. I have an exhaust spacer on my RXT and gained around 100 RPM. The only thing new about this spacer is the EGT and O2 sensor ports.

[Cagedup]

Ok I'll do it

So no one has any solid results from this? I can see where you may not see much difference on a bone stock motor. But I want to try one on my RXP 300. I can see with tune adjustments where this plate couldn't do anything but help. Especially has restrictive as the stock manifolds seem to be.

Well I guess I'll be the one post the results. Currently I am running 81mph with a HPT tune, rear intake and resonator delete. That's with the seat on and my big a$$ on it (210lbs). I will post results of this RIVA race plate in the coming weeks.

[Cagedup]

Because they would have to be water jacketed which makes them incredibly expensive. The prototypes that were made were always springing leaks causing all sorts of issues.

I have always wondered that, but this makes sense.

[1tommygunner1927]

Sure, I datalogged exh. back pressure as well.

What I’m saying is even if you changed to a 3” primaries with a giant collector pre turbo, your back pressure wouldn’t change much, since that’s not the bottle neck that dictates exh drive pressure. The turbo is.

As an example, my orig. kit was 2.5” off the manifolds pre-turbo into a T4 1.10 housing and a 75/83 exh wheel. Same engine with 2” piping off each manifold to the turbo flange. Switched to a 1.32 T6 housing with an 87/96 wheel and the overall system back pressure was LOWER and my response time “spool” wasn’t noticeably changed. The higher velocity exh gas allowed me to run a larger turbo without it being a lag monster and made more power per pound. Went from over 2.4:1 BPR to a 1.8 at the same 20lbs.

Good info, thanks for sharing it. My turbo uses a .64 AR turbine housing but a .85 AR is available, and with a V-band.

[Forcefed1986]

Whatever the "pressure ratio" (PR) is in my turbo, it can be measured and datalogged. I don't know what that number is for my turbo, but I intend to find out. As you probably know, if the PR is too high, bad things can and do happen.

Sure, I datalogged exh. back pressure as well.

What I’m saying is even if you changed to a 3” primaries with a giant collector pre turbo, your back pressure wouldn’t change much, since that’s not the bottle neck that dictates exh drive pressure. The turbo is.

As an example, my orig. kit was 2.5” off the manifolds pre-turbo into a T4 1.10 housing and a 75/83 exh wheel. Same engine with 2” piping off each manifold to the turbo flange. Switched to a 1.32 T6 housing with an 87/96 wheel and the overall system back pressure was LOWER and my response time “spool” wasn’t noticeably changed. The higher velocity exh gas allowed me to run a larger turbo without it being a lag monster and made more power per pound. Went from over 2.4:1 BPR to a 1.8 at the same 20lbs.