What have you done to your RX-8 today????

[Nanotrox]

That seems a lot for a standard rebuild, what extras are in that price?

Spent a good probably 40 minutes on the phone today talking to RR today about all the different prices with breakdowns so
£2,729.99 is the "Rotary Revs gold rebuild" with resurfaced housings

£6,114.94 is the above but plus
goopy apex seals
1000 mile Run in on dino + tune + service
Bridgeport
Lightened and balanced rotas
Competition clutch
Superlight weight flywheel
Counterweight
Pettit racing catback + 1 hour labour

Tbh the main thing I'm unsure about getting is the lightened rotas and the clutch + fly + counter as I've seen people saying it makes it less driveable in traffic?

[qwakers]

you dont want goopy apex seals.

[Nanotrox]

you dont want goopy apex seals.

oh? I'm not so clued up on this topic so apologise here but how come? I was just going by what I was told on the phone, was told to go goopy with the bridgeport?

[qwakers]

they cause excessive wear of the housings and have other downsides like shorter expected life. goopy are ok for forced induction, but the general advice is to go genuine seals for N/A.

[nightfire10]

RRP
https://www.ryanrotaryperformance.com/r ... ne-rebuild

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[SmuttyHutty]

I've done a lot of research on this kind of thing in the past and while others may point out where I've been misled, this is essentially what my findings/opinions were;

Balancing the rotors makes sense for every rebuild, as brand new they're built in a one size fits all type, then selected at factory to match in an engine. If refurbed or re-used, even if from the same engine, they may well have marginally different rotational centres of mass for any number of reasons. This is obviously bad as your engine will be trying to shake itself to pieces (even if ever so slightly) from day 1. That's not to say an unbalanced engine is inherently bad or will grenade itself in X amount of time, but every little helps and if you're going to the time and expense you may as well do it properly.

Lightening them will lead to reduced drivability in traffic, but only because the reduced mass will cause them to drop revs like they're hot. The upside of this of course is they'll gain revs just as quickly (so you slam through the rev range) but you'll have to keep an eye on it and it'll be a little more effort. Lightened flywheel will exacerbate both sides of this as that's even less mass and therefore force maintained in the rotating assembly. The competition clutch probably won't help in traffic either as it'll be more of a racing clutch so less 'relaxed'.

Bridgeport will also make it slightly less driveable in traffic from what I've been led to believe, I was originally all for a Bridgeport when it's my time for a rebuild (more expensive must be better right?) but tbh I think a street or half bridge is more than enough for your average Joe who's going to mostly do road driving with perhaps the odd excursion on track (Hello, that's me).

This is not to say you should/shouldn't have any of this, just that you should know what you're getting yourself into so you don't fall into the 'bigger/more expensive is better' mentality.

[Nanotrox]

Thanks for the replies everyone some really good new information to me!

Got a lot of thinking to do, I think I'm pretty set on the Bridgeport and balancing / lightening now, just got to think about the comp clutch and ultralight flywheel might only get these done if the clutch is pretty worn when the engine comes out.

[qwakers]

do the clutch either way. i have burned myself like that with a clutch that only looked half worn... 2k miles later i needed a clutch as as youre doing it, might as well put a lightened flywheel in. id possibly not bother with a performance clutch, just a std exedy.

[Pippypip]

It does make sense to get it done since it's all out, thanks again

[goodeggbob]

While your engine is out you would only be paying for the clutch itself, installing it would be part of a rebuild any way,new or not.

[Pippypip]

It does make sense to get it done since it's all out, thanks again

Seems to me that you will be racking up quite a bill there

[goodeggbob]

one thing i noticed when i had the flywheel lightened and balanced in my capri 2.8 was that in traffic it wasn't very good at idling.
i realise that we are talking different engines,but what i did was raise the idle by about 150rpm,but the throttle response was almost instant,and slowing down through the gears was much quicker.

[Conan]

As others have said, lightweight flywheel and balancing the engine are good and does not make a massive difference to driveability , stick with the standard new clutch the others are too heavy and you will notice that a lot in traffic.
Just an exedy friction plate would do if you can buy them separate
Regards
Pete

[Conan]

one thing i noticed when i had the flywheel lightened and balanced in my capri 2.8 was that in traffic it wasn't very good at idling.
i realise that we are talking different engines,but what i did was raise the idle by about 150rpm,but the throttle response was almost instant,and slowing down through the gears was much quicker.

It shouldn’t have made that much difference to the tickover, I’ve been lightening engines for 40 years.
I’ve machined and lightened race engines to death without those kind of problems.
I didn’t have any problems with the RX-8 either
Pete

[goodeggbob]

Pulling up sharply seemed to be the worst time, sometimes it would recover,but mostly it stalled. also,the oem flywheel was about 15 kg and it went down to about 8.5kg ,and i don't know for sure whether the idle speed was correct in the first place,however lightening the flywheel was well worth the gains made.

[ChrisHolmes]

It’s not really a relevant comparison quoting a big old V6 engine as the rotating and reciprocating masses are so different to tge Renesis.
When working out your engine specification the ultimate use needs to be known. Every engine, piston or rotary, can have its balance improved and components lightened when being rebuilt but unless the end goal is to use high revs frequently or for long periods and with more hp then then those are not really necessary. Spending an equivalent amount on updating suspension would be money better spent.
I have run a Stg 1 Exedy clutch in my SC RX8 and it is more than adequate and feel like a standard clutch in daily driving. A lightened flywheel will need a slightly raised ideal speed and at idle may result in slightly more engine vibration as the smaller mass is affected more by each power pulse.
A street ported engines character will be virtually unchanged compared to a standard engine, but a non ported rebuilt engine will be significantly improved over the previous engine and the improvement is sometimes assumed to be due to the porting.
Half Bridge and Full Bridge port designs vary between rebuilders and can give a decent, for a rotary, power increase but will change the characteristics of the engine which can be an issue if the car is used mainly on the road or in traffic a lot.
As you can see from you modified engine price the cost ramps up very quickly.
You have a very nice looking 40th Anniversary and in years to come the cars value with a Gold rebuild engine should be more than if it has a lightened, balanced and ported engine etc; this sentence a personal assumption but the preceding paragraphs are based on my personal experience in the engine remanufacturing and parts distribution industry over 30 years.

At the end of the day of course it is your car and all we can do is advise tge options available with pros and cons for you to decide what will meet you intended usage and of course budget!

[Ryan Rotary Performance]

That seems a lot for a standard rebuild, what extras are in that price?

Spent a good probably 40 minutes on the phone today talking to RR today about all the different prices with breakdowns so
£2,729.99 is the "Rotary Revs gold rebuild" with resurfaced housings

£6,114.94 is the above but plus
goopy apex seals
1000 mile Run in on dino + tune + service
Bridgeport
Lightened and balanced rotas
Competition clutch
Superlight weight flywheel
Counterweight
Pettit racing catback + 1 hour labour

Tbh the main thing I'm unsure about getting is the lightened rotas and the clutch + fly + counter as I've seen people saying it makes it less driveable in traffic?

For comparison: (Not trying to poach RR's work we are very busy and couldn't fit you in until April anyway, but for others to see when their time comes )

RRP Bridge-Port £2925 (although we believe our new street to beat any bridge, just waiting on Dyno time)
Goopy Seals - We use OEM
Tune & service (oil) - £340
Balanced assembly - £350
Lightened rotors we don't normally do but can for £200 (will need to be balanced after)
OEM clutch - £290
Ultralightweight Flywheel - £380
RRP Catback £600

TOTAL £5085.00

[nightfire10]

=14 tanks of fuel saving

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[Scartlead]

A Street port to better a bridge?? Do tell Carl

[rotatopotato]

How would that pricing look for a semi-pp build?

[Ryan Rotary Performance]

How would that pricing look for a semi-pp build?

We don't have firm pricing for that yet, the intake will be about £1250 but there are some savings on porting costs.. It will not be long until the first one is complete, its on the machine as we speak

[Ryan Rotary Performance]

A Street port to better a bridge?? Do tell Carl

I have the first in my car here; just waiting on a date to take it to revs for a dyno.

It definitely has a lot more lower down torque than a bridge, and up top pulls just as strong if not stronger. By far the best NA Rx8 I've driven.

[V8 Power]

A Street port to better a bridge?? Do tell Carl

I have the first in my car here; just waiting on a date to take it to revs for a dyno.

It definitely has a lot more lower down torque than a bridge, and up top pulls just as strong if not stronger. By far the best NA Rx8 I've driven.

Apart from mine obviously

[rotatopotato]

How would that pricing look for a semi-pp build?

We don't have firm pricing for that yet, the intake will be about £1250 but there are some savings on porting costs.. It will not be long until the first one is complete, its on the machine as we speak

Looking forward to it

[Nanotrox]

For comparison: (Not trying to poach RR's work we are very busy and couldn't fit you in until April anyway, but for others to see when their time comes )

RRP Bridge-Port £2925 (although we believe our new street to beat any bridge, just waiting on Dyno time)
Goopy Seals - We use OEM
Tune & service (oil) - £340
Balanced assembly - £350
Lightened rotors we don't normally do but can for £200 (will need to be balanced after)
OEM clutch - £290
Ultralightweight Flywheel - £380
RRP Catback £600

TOTAL £5085.00

Wow they are some good prices! RR although more expensive just being the closest to me once I add fuel in for travelling with 2 cars (one is to come back in after dropping mine off) and the amount of fuel money saved doing the run in on the dyno etc works for me.

I'm not booked in until June anyways due to money and time restrictions on my end.

The street port does sound good that your developing I'm just a sucker for the brideport sound haha.