RRP Semi PP engine - one step closer- update 1 March

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Ryan Rotary Performance
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RRP Semi PP engine - one step closer- update 1 March

Post by Ryan Rotary Performance » Thu Feb 06, 2020 8:11 pm

The RRP Semi PP intake engine is getting closer.

Some of you may know that we have been working on this particular engine for a while now along with the Peripheral Exhaust engine we are working on too. We are still going to develop that engine but put it on hold until the intake side is complete.

What is the RRP Semi PP (Peripheral Port) engine?

Well we start with standard power 4 port engine, we use this engine as the base engine as both the exhaust ports and intake ports are smaller allowing us more scope to shape them how we wish to shape them providing the perfect balance between low end torque but while maintaining this as long as possible up the rev range. The 4 Port actually delivers more torque earlier on that the 6 Port, the reason why is due to the size and shape of the Intake and Exhaust Ports.

In addition to this the 6 Port base engine would be seriously complicated to make into what would be an 8 port system. Don’t worry though the RPP Semi PP engine will fit both 192 and 231 cars with just a remap required! 
The two new additional intake ports in the housing are different to the standard Side Ports for which opening and closing times are controlled via the side seals. Peripheral Ports are control via the Apex seal. The result being a Peripheral Port will significantly increase the capacity of the intake system, more air, plus fuel generally equals more power.

How are you controlling port timing?

We are designing a complete new intake system with controllable valves, you’ll retain a fully functional Secondary Shutter Value (SSV) in addition to this the PP will also be controllable via the stock ECU probably activating at the point where the Auxiliary Port Valve (APV) does. What you will lose is the Variable Dynamic Intake (VDI).
We will also incorporate a switch to open the PP at idle which will give some serious braps! Move over Bridge-Port the RRP Semi PP has landed!

Why do this?

Well we hope in NA form that this will achieve significantly more power all the way up the rev range than the current 231 and standard 192, but where the 192 drop off we believe we can hold on and increase the torque of the engine. Top line figures may only marginally be better than a very good full Bridge-Port at 220WHP but the area under the curve should be so much better you will really feel it.
The new intake will also make room for a Top mount turbo which in Side Exhaust form will make 400WHP all day long, swap the Side Exhaust for a Peripheral and you’re talking 500/600WHP for a top mount turbo.

Some pics to enjoy for now:

192 Flange has been probed to give a really good base CAD:
Probe.jpg
Flange CAD for which the prototype has been ordered for test fitting:
Flange_Detail_v2_2020-Feb-06_12-14-30PM-000_CustomizedView39502101087.png
Housing inserts:

These are actually just a screw in fit with an integral O-Ring, so no horrible Cement is used to block off the water gallery.
Insert.jpg
pp Insert 3.jpg
PP Insert 2.jpg
PP Insert 1.jpg
Last edited by Ryan Rotary Performance on Sun Mar 01, 2020 1:17 pm, edited 2 times in total.
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Re: RRP Semi PP engine - one step closer

Post by Vj4sothername » Thu Feb 06, 2020 8:15 pm

You know I'm saving for a wedding and buying a house right?
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Re: RRP Semi PP engine - one step closer

Post by Yorindesarin » Thu Feb 06, 2020 8:29 pm

Vj4sothername wrote:
Thu Feb 06, 2020 8:15 pm
You know I'm saving for a wedding and buying a house right?
Isn't that what a mortgage is for... Just say the house will need doing up... Exta £10k for that... Cough.. Cough..
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Re: RRP Semi PP engine - one step closer

Post by Honkytonk » Fri Feb 07, 2020 7:13 am

"Where's our money for the new kitchen gone?!"

"Braps before Taps"

"WHAT DOES THAT EVEN MEAN"
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Re: RRP Semi PP engine - one step closer

Post by Yorindesarin » Fri Feb 07, 2020 7:43 am

Laughed more than I should've at that.

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Re: RRP Semi PP engine - one step closer

Post by Secla » Fri Feb 07, 2020 8:06 am

Ryan Rotary Performance wrote:
Thu Feb 06, 2020 8:11 pm
The new intake will also make room for a Top mount turbo which in Side Exhaust form will make 400WHP all day long, swap the Side Exhaust for a Peripheral and you’re talking 500/600WHP for a top mount turbo.
That sounds right up my street 🤔

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Re: RRP Semi PP engine - one step closer

Post by Dom-PZ » Fri Feb 07, 2020 3:24 pm

*Sensible hat on

Any chance of still passing MOT emissions?

*Sensible hat off, sorry.

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Re: RRP Semi PP engine - one step closer

Post by warpc0il » Fri Feb 07, 2020 5:24 pm

Making good power requires as complete combustion as possible, which also aids emissions.

With a good PCM map and a quality cat, emissions shouldn't be a problem, at least as tested for the MOT ;)
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Re: RRP Semi PP engine - one step closer

Post by Ryan Rotary Performance » Sat Feb 08, 2020 7:31 am

:whathesaid:
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Re: RRP Semi PP engine - one step closer

Post by Scotty PZ » Sat Feb 08, 2020 1:14 pm

Well, this is a post worth keeping an eye on.... My bank balance (or wife) is not going to thank you.
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Re: RRP Semi PP engine - one step closer

Post by Ryan Rotary Performance » Sun Mar 01, 2020 1:15 pm

Little update:

Flange prototype has been test fitted and ready for production:
PSX_20200301_122325.jpg
PSX_20200301_122454.jpg
PSX_20200301_122420.jpg

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Re: RRP Semi PP engine - one step closer- update 1 March

Post by 13Black » Sun Mar 01, 2020 1:57 pm

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Re: RRP Semi PP engine - one step closer- update 1 March

Post by Goobie » Thu Mar 05, 2020 4:24 pm

Awesome stuff Carl.

Is the rest of the intake part all the way to the throttle body going to be all new design or will it just join up to the top half of the factory inlet plastic section?

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Re: RRP Semi PP engine - one step closer- update 1 March

Post by ChrisHolmes » Thu Mar 05, 2020 7:51 pm

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Re: RRP Semi PP engine - one step closer- update 1 March

Post by sKenDread » Fri Mar 06, 2020 8:28 am

Is it possible to peripheral port the exhaust? More air in and out?
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Re: RRP Semi PP engine - one step closer- update 1 March

Post by V8 Power » Fri Mar 06, 2020 9:24 am

I think that is RRP’s ultimate goal.
My car is PP’d both inlet and exhaust as a bit of a one off but RRP are making a truly well engineered and repeatable conversion.
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Re: RRP Semi PP engine - one step closer- update 1 March

Post by Ryan Rotary Performance » Fri Mar 06, 2020 11:18 am

Thats right; so the end goal is Peripheral intake and exhaust, although the peripheral exhaust will be more suited to track NA and turbo conversions. The side exhaust will actually feel and perform better on the road due to the longer power stoke and better thermal efficiency lowering fuel consumption (yes i know we are Rotarys)
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