Search found 176 matches

by RenesisRaceBuggy
Tue Aug 06, 2019 7:33 pm
Forum: RX-8 Discussion
Topic: Coil pack testing
Replies: 21
Views: 543

Re: Coil pack testing

I used to put RAM sinks on those blocks when I ran Mazda coils.
by RenesisRaceBuggy
Sun Aug 04, 2019 6:47 pm
Forum: RX-8 Discussion
Topic: Coil pack testing
Replies: 21
Views: 543

Re: Coil pack testing

As above, you can't sustain full dwell up to the redline because you simply don't have the time available. Having said that you don't necessarily need it as combustion pressure is dropping too.
by RenesisRaceBuggy
Sun Aug 04, 2019 6:07 pm
Forum: RX-8 Discussion
Topic: Electric SUPERCHARGER
Replies: 58
Views: 1208

Re: Electric SUPERCHARGER

Probably ~30cfm with little/no restriction. And then zero at ~0.05psi - just going off my EBM catalogue.
It's probably not even going to have enough flow to stop it from restricting the intake at full throttle.
by RenesisRaceBuggy
Fri Jul 26, 2019 10:25 pm
Forum: RX-8 Discussion
Topic: The importance of a good ignition system
Replies: 13
Views: 659

Re: The importance of a good ignition system

Yeah, the stock leads are crap, the insulation gets compromised really fast with heat/ozone, etc, and then it arcs up the sheathing to earth instead of the plug, I don't think I ever managed more than a single weekend on stock leads before they were arcing up the insulation.
by RenesisRaceBuggy
Wed Jul 24, 2019 3:05 am
Forum: RX-8 Discussion
Topic: RRP r3 - s1 water pump
Replies: 1
Views: 172

Re: RRP r3 - s1 water pump

I used to fit them to the S1 engines, they had far less cavitation over 6krpm than the S1 pumps did, much better when they're not pumping vacuum pockets at high rpm. Mind the larger/later pulley helps some with that too.
by RenesisRaceBuggy
Tue Jul 16, 2019 1:59 pm
Forum: RX-8 Discussion
Topic: RX8 Syncro Saver Feedback
Replies: 6
Views: 330

Re: RX8 Syncro Saver Feedback

Can't see how that would save a synchro, since the synchro rings will be locked up and the dogs fully engaged by the time it's in gear anyway...
by RenesisRaceBuggy
Wed Jun 26, 2019 6:25 pm
Forum: RX-8 Discussion
Topic: How to improve Ignition
Replies: 36
Views: 1236

Re: How to improve Ignition

It's easy, a normal piston engine is going to fire it's coil at half the crank rpms, the rotary fires every rpm. So 9000rpm 4-stroke piston = 4500 sparks/min/coil - for a rotary that's 9000 sparks/min/coil. Basically more like a 2-stroke ignition system (in fact the easiest way to fit an aftermarket...
by RenesisRaceBuggy
Tue Apr 16, 2019 11:11 am
Forum: RX-8 Discussion
Topic: After track day lots of grinding!
Replies: 113
Views: 4039

Re: After track day lots of grinding!

Either both together, or the inside, outside, then inside again is the quickest way to purge them.
by RenesisRaceBuggy
Thu Apr 04, 2019 8:06 pm
Forum: RX-8 Discussion
Topic: What have you done to your RX-8 today????
Replies: 21034
Views: 752252

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

Found the launch control button....



;)
by RenesisRaceBuggy
Tue Apr 02, 2019 1:03 pm
Forum: RX-8 Discussion
Topic: Uprated engine mounts?
Replies: 41
Views: 1504

Re: Uprated engine mounts?

When I started playing with PU filled OEM mounts I found that to have them soft enough not to buzz the car meant that the suspended drive train would resonate (wobble) over bumps. It was only a very subtle bouncing but I could feel it and knew what it was straight away. And it annoyed me. After bri...
by RenesisRaceBuggy
Mon Apr 01, 2019 9:12 pm
Forum: RX-8 Discussion
Topic: Uprated engine mounts?
Replies: 41
Views: 1504

Re: Uprated engine mounts?

They still won't have the performance/NVH suppression range that that the liquid damped OE ones would have. But if you want harder mounts you have little option.
by RenesisRaceBuggy
Tue Mar 19, 2019 4:01 pm
Forum: RX-8 Discussion
Topic: Bleeding Brake Problem
Replies: 324
Views: 11663

Re: Bleeding Brake Problem

The servo would never have been the issue with a pedal going to the floor unless the linkage was broken tbfh. I would clean all the lines off with solvent, wrap them all with paper towel - especially around the fittings and pump the brakes a few times to see if a weep shows up. Are you certain the n...
by RenesisRaceBuggy
Sun Mar 10, 2019 9:18 pm
Forum: RX-8 Discussion
Topic: How does the Honda S2000 compare with the RX-8?
Replies: 35
Views: 1460

Re: How does the Honda S2000 compare with the RX-8?

Just me going off-topic and reminiscing again... I had this issue when the engine went on my Yamaha XS2 650 and the dealer told me that secondhand units were expensive because of the demand and that they got a disproportional call for replacement engines parts - which all indicated that these engin...
by RenesisRaceBuggy
Sun Mar 10, 2019 4:47 am
Forum: RX-8 Discussion
Topic: How does the Honda S2000 compare with the RX-8?
Replies: 35
Views: 1460

Re: How does the Honda S2000 compare with the RX-8?

I can't say I've ever heard of many vtec issues. In fact one of Honda's big talking points used to be that they'd never had a failure of the VTEC system on any car back in the K20 days. It's so robust you'd struggle to break it. They're holding their prices even crashed because all the rallying guys...
by RenesisRaceBuggy
Thu Mar 07, 2019 6:28 pm
Forum: RX-8 Discussion
Topic: How does the Honda S2000 compare with the RX-8?
Replies: 35
Views: 1460

Re: How does the Honda S2000 compare with the RX-8?

I've driven both, but not for long, maybe 15 mins or so in the Honda at most - just from what I can remember, I'd say the RX8 felt better balanced chassis wise, much more supple and predictable down B-roads - but the S2K felt quicker to react/respond as it feels stiffer sprung. RX-8 is more comforta...
by RenesisRaceBuggy
Thu Mar 07, 2019 6:23 pm
Forum: RX-8 Discussion
Topic: Bleeding Brake Problem
Replies: 324
Views: 11663

Re: Bleeding Brake Problem

But you wouldn't get fluid in the servo without the rear master cylinder seal leaking, and you've had new M/C's on it, no?
by RenesisRaceBuggy
Wed Mar 06, 2019 11:13 pm
Forum: RX-8 Discussion
Topic: Bleeding Brake Problem
Replies: 324
Views: 11663

Re: Bleeding Brake Problem

Is there a diagnostic cycle in the dealer software or similar that will cycle the ABS unit? Some ABS systems won't prime at all unless the valves are cycled in the right order at high frequency and usually it's through command via the manufacturer diagnostic software. I would also, if you haven't al...
by RenesisRaceBuggy
Wed Mar 06, 2019 10:24 pm
Forum: RX-8 Discussion
Topic: Is it worth upgrading the front strut brace? Will it provide any noticeable improvement over the OEM?
Replies: 33
Views: 1012

Re: Is it worth upgrading the front strut brace? Will it provide any noticeable improvement over the OEM?

These are from a half beam/half indy. I've got some Fox freelander units floating around somewhere though, but the only difference is they're 2" shorter stroke
by RenesisRaceBuggy
Wed Mar 06, 2019 8:31 pm
Forum: RX-8 Discussion
Topic: Oil leak front central
Replies: 34
Views: 1001

Re: Oil leak front central

A little late as that does just look like the sump/engine oil - but for future use, hydraulic damper oil is pretty easy to test, it's generally very thin and if you rub it between your fingers it's not actually very slippery - it's generally a poor lubricant, it feels almost dry and you'll still hav...
by RenesisRaceBuggy
Wed Mar 06, 2019 7:48 pm
Forum: RX-8 Discussion
Topic: Is it worth upgrading the front strut brace? Will it provide any noticeable improvement over the OEM?
Replies: 33
Views: 1012

Re: Is it worth upgrading the front strut brace? Will it provide any noticeable improvement over the OEM?

It's not punching through the strut tops, it's bringing the local stiffness up to where it's outside of the top mount and damper frequencies. The lateral loads at a Mcpherson strut top are tiny compared to the wishbone and subframe loads. Generally an order of magnitude lower. If camber control was ...
by RenesisRaceBuggy
Wed Mar 06, 2019 6:57 pm
Forum: RX-8 Discussion
Topic: Is it worth upgrading the front strut brace? Will it provide any noticeable improvement over the OEM?
Replies: 33
Views: 1012

Re: Is it worth upgrading the front strut brace? Will it provide any noticeable improvement over the OEM?

It's not. Strut braces prevent lateral movement of the strut top, which directly and adversely affects the camber control. Strut braces are in totally the wrong plane to contribute to vertical stiffness. McPherson type struts take a huge amount of camber moment. Enough to require larger diameter da...
by RenesisRaceBuggy
Wed Mar 06, 2019 1:47 am
Forum: RX-8 Discussion
Topic: Is it worth upgrading the front strut brace? Will it provide any noticeable improvement over the OEM?
Replies: 33
Views: 1012

Re: Is it worth upgrading the front strut brace? Will it provide any noticeable improvement over the OEM?

Rigidity is incredibly important for damper performance - which is what strut braces are there for on mcpherson strut cars too - it's not to stop the geometry moving around (a minute amount of flex at the top of a strut tower would make almost no difference to the geo) - it's to lift the localised s...
by RenesisRaceBuggy
Tue Mar 05, 2019 1:27 am
Forum: RX-8 Discussion
Topic: To scoop or not to scoop?
Replies: 83
Views: 2580

Re: To scoop or not to scoop?

Keke wrote:
Mon Mar 04, 2019 6:56 pm
So would that duct be made made of some sort of plastic or have I misread your answer?
Yes, it'll be abs/poly or nylon with some chopped fibre in it at a guess.
by RenesisRaceBuggy
Mon Mar 04, 2019 6:45 pm
Forum: RX-8 Discussion
Topic: To scoop or not to scoop?
Replies: 83
Views: 2580

Re: To scoop or not to scoop?

In case anyone isn't sure, ftp is just another name for fiberglass. I believe fiberglass is a trademarked name, but frp isn't. Well, it's generally that anything called fibreglass will be bulk glassfiber held together with a binder (epoxy, vinyl, polyester) - whereas FRP is usually a plastic - ABS,...
by RenesisRaceBuggy
Fri Mar 01, 2019 2:25 pm
Forum: RX-8 Discussion
Topic: How to use cataclean?
Replies: 19
Views: 641

Re: How to use cataclean?

Make sure you use the fuel with the cataclean in it fairly quickly too, you don't want it sat around in the fuel system for too long, it's extremely aggressive solvents.

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