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Search: Posts Made By: Brettus
Showing results 1 to 50 of 159
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02-07-2019, 02:24 PM
Replies: 227
Views: 19,156
Posted By Brettus

Hasn't been an issue for me either . A few people...

Hasn't been an issue for me either . A few people have had issues but I suspect that is due to the drain line being too small or not fitting a restrictor to the oil supply line.
02-02-2019, 04:31 PM
Replies: 14
Views: 477
Posted By Brettus

I've seen that dyno shape many times before and...

I've seen that dyno shape many times before and it almost always ends up being ignition related . You would be shocked at how many 585 coils I've found to be faulty from new !
Forum: Rotary Swaps
01-20-2019, 04:39 PM
Replies: 402
Views: 45,462
Posted By Brettus

woot! ... that's great news !

woot! ... that's great news !
Forum: Rotary Swaps
12-31-2018, 03:43 PM
Replies: 402
Views: 45,462
Posted By Brettus

I have the rx8 performance bushes . Not sure what...

I have the rx8 performance bushes . Not sure what others use. I don't think there has been much effort put into drag racing on the stock driveline.
12-28-2018, 06:35 PM
Replies: 227
Views: 19,156
Posted By Brettus

Good luck stroker!

Good luck stroker!
Forum: NE RX-8 Forum
12-17-2018, 07:13 PM
Replies: 17
Views: 11,093
Posted By Brettus

in the 2006 or newer models those ports have a...

in the 2006 or newer models those ports have a rubber tube connected to them which goes to the oil filler neck ..... just trace them down to the lower intake manifold .....
12-04-2018, 04:45 PM
Replies: 542
Views: 158,138
Posted By Brettus

That's because most people think it's just plug...

That's because most people think it's just plug and play . It's a really big modification to your engine .............it takes a lot of time/effort/skill/knowledge to get it running correctly and...
12-03-2018, 08:32 PM
Replies: 88
Views: 5,315
Posted By Brettus

Update : A recent discussion on the Purely site...

Update : A recent discussion on the Purely site has filled in the gaps for me about a few things .
Firstly , here is a quote from Don Walker , a guy who has raced rx8s extensively . We were...
11-30-2018, 02:08 PM
Replies: 2,321
Views: 126,842
Posted By Brettus

I had a rattle on one of my earlier engines that...

I had a rattle on one of my earlier engines that had done about 60000kms ....... turned out to be caused by the corner seals dropping into that step beside the exhaust ports.
The oil leak is likely...
11-29-2018, 01:56 PM
Replies: 33
Views: 1,342
Posted By Brettus

Sounds like he has a system where the fan is...

Sounds like he has a system where the fan is constantly battling against the thermostat for temp control . Fan control should be around 200F minimum . Maybe not a bad thing for oil/water temps on...
11-29-2018, 01:16 PM
Replies: 33
Views: 1,342
Posted By Brettus

Yes ... temps that are too low can be bad ........

Yes ... temps that are too low can be bad ..... hard to know where the cutoff line is ...but I reckon the guys at Mazda probably had more idea on this than anyone here .....
11-27-2018, 05:43 PM
Replies: 51
Views: 3,851
Posted By Brettus

For peak power ... you still need the same (if...

For peak power ... you still need the same (if not more) airflow if you reduce rpm but at a higher boost. This does suit typical compressor maps better as most maps are more efficient at higher...
11-27-2018, 04:36 PM
Replies: 3
Views: 617
Posted By Brettus

New range of EFR turbos

Wow ... these new turbos will be the next hot thing for turbo rotaries! Flow maps that are more suited to a rotary combined with those already decent sized lightweight turbines.
...
11-24-2018, 03:09 PM
Replies: 2,321
Views: 126,842
Posted By Brettus

I said at the time that I suspected abnormal...

I said at the time that I suspected abnormal housing wear was a combination of the soft E&J seals and E50 . As you haven't seen the same wear .... it would seem that is the case ...probably add...
11-21-2018, 03:01 AM
Replies: 51
Views: 3,851
Posted By Brettus

Yes ---same for 4 port . It's rumored Pac made...

Yes ---same for 4 port .
It's rumored Pac made 427whp but I can't recall ever seeing a dyno . Again ... be aware that , for example 430whp on a dynojet is only 385ish on a more realistic dyno.
11-21-2018, 02:17 AM
Replies: 51
Views: 3,851
Posted By Brettus

The 450whp Renesis engine - why it will never happen - theory

As many of you know , I've been pursuing the goal of creating the highest whp Renesis ever recorded . I believe I have succeeded in doing that (arguably) but along the way have encountered many...
11-11-2018, 07:11 PM
Replies: 1,847
Views: 171,652
Posted By Brettus

Because of heat soak .... Once that mass of AL....

Because of heat soak .... Once that mass of AL. is heat soaked .... it doesn't do nearly as good a job as it did on the first pull .I've been on the dyno where we had to wait a good 5 mins before...
10-28-2018, 09:55 PM
Replies: 1,847
Views: 171,652
Posted By Brettus

Same size ...but should flow heaps better and...

Same size ...but should flow heaps better and even though there is less actual surface area , I'm expecting it to cool at least as well if not better....
10-27-2018, 01:16 AM
Replies: 33
Views: 1,342
Posted By Brettus

Yep

Yep
10-26-2018, 05:56 PM
Replies: 33
Views: 1,342
Posted By Brettus

I had same problem when I had a big (600x300) IC...

I had same problem when I had a big (600x300) IC . Went with a smaller one and lifted it up as high as possible to get air to the radiator. That worked for cooling but the intercooler is now marginal...
10-25-2018, 07:54 PM
Replies: 227
Views: 19,156
Posted By Brettus

This is really bad luck jcb .... Glad you are...

This is really bad luck jcb .... Glad you are able to be up front about it and let people know what happened.
10-25-2018, 04:21 PM
Replies: 33
Views: 1,342
Posted By Brettus

I've refilled an rx8 from bone dry a dozen times...

I've refilled an rx8 from bone dry a dozen times maybe . By far and away the best way to do it is to remove the top hose coming from the heater . Then just fill her up while giving the main hose to...
10-25-2018, 02:49 PM
Replies: 33
Views: 1,342
Posted By Brettus

Is your fan shroud sitting hard up against the...

Is your fan shroud sitting hard up against the radiator ? If there is a gap you lose a heap of efficiency .
Forum: Rotary Swaps
10-24-2018, 02:40 PM
Replies: 402
Views: 45,462
Posted By Brettus

You would definitely lose a few pounds of...

You would definitely lose a few pounds of backpressure by dumping to atmos but I doubt you would like the sound . On a scale of 1-10 ...I'd give it a 12 because it's not only loud ...it's nasty . I...
10-23-2018, 08:36 PM
Replies: 22
Views: 557
Posted By Brettus

The fact that you are already talking "approval...

The fact that you are already talking "approval from my wife" spells it out pretty clearly from where i'm sitting . A turbo or SC is not going to be a good thing for you . Forget it and go buy a...
10-20-2018, 12:51 AM
Replies: 42
Views: 1,445
Posted By Brettus

Just did .... Seems that guy didn't fully...

Just did .... Seems that guy didn't fully understand how it worked ;)
10-20-2018, 12:27 AM
Replies: 42
Views: 1,445
Posted By Brettus

RX7 pump Compare with pic on first page (of the...

RX7 pump
Compare with pic on first page (of the linked thread) ...design is the same :
...
10-19-2018, 11:55 PM
Replies: 42
Views: 1,445
Posted By Brettus

Not true : ...

Not true :
https://www.rx8club.com/series-i-tech-garage-22/omp-oil-metering-pump-output-modification-268559/
10-19-2018, 06:42 PM
Replies: 1,847
Views: 171,652
Posted By Brettus

Thanks to some tips from jcbrx8 I'm finally able...

Thanks to some tips from jcbrx8 I'm finally able to overlay logs from the AEM failsafe .
The log below shows :
boost press - light blue
Pressure at turbo- dark blue
Pressure at turbine - red
I...
10-18-2018, 12:01 AM
Replies: 88
Views: 5,315
Posted By Brettus

I'm really leaning toward your way of thinking . ...

I'm really leaning toward your way of thinking .
With a stock OMP :
*Street cars that spend very little time in higher rpm/load range wear out the housings very quickly .... I've seen heaps of...
10-14-2018, 06:14 PM
Replies: 22
Views: 518
Posted By Brettus

But ................ it does ! I've tuned maybe a...

But ................ it does ! I've tuned maybe a dozen cars with the AEM intake . All of them needed the maf rescaled to avoid fuel trims that caused them to run too rich under load.
10-12-2018, 05:59 PM
Replies: 22
Views: 518
Posted By Brettus

The AEM intake could have something to do with...

The AEM intake could have something to do with the low mpg as they don't register the same g/s as a stock intake . That LTFT will be mostly from the AEM ...IMO .
What is ltft when you are cruising...
10-12-2018, 01:24 PM
Replies: 88
Views: 5,315
Posted By Brettus

Yes ... it could just be the positioning of the...

Yes ... it could just be the positioning of the sensor which commonly causes a limp mode to occur .
10-11-2018, 05:54 PM
Replies: 88
Views: 5,315
Posted By Brettus

The small pump major diameter is 2.5mm and the...

The small pump major diameter is 2.5mm and the large one is 5.4mm .Maximum stroke is 1.5mm.
The drive shaft for the omp rotates once for every two revs of the engine .
The small pump rotates once...
10-11-2018, 05:03 AM
Replies: 25
Views: 990
Posted By Brettus

Ethanol content ?

Ethanol content ?
10-09-2018, 02:19 PM
Replies: 227
Views: 19,156
Posted By Brettus

I like to deactivate the VDI altogether . It's an...

I like to deactivate the VDI altogether . It's an NA valve only and with FI it tends to just create a power drop as it opens but has no other effect - positive or negative.
The APV valve activation...
Forum: RX-8 Racing
10-03-2018, 03:11 PM
Replies: 129
Views: 5,872
Posted By Brettus

Unless you have somehow seriously messed up your...

Unless you have somehow seriously messed up your setup ...you wont have air anywhere.
09-30-2018, 04:10 PM
Replies: 227
Views: 19,156
Posted By Brettus

Impressed with your systematic approach to the...

Impressed with your systematic approach to the task . Looking good !
09-30-2018, 03:20 PM
Replies: 10
Views: 592
Posted By Brettus

Because that turbo doesn't come with that turbine...

Because that turbo doesn't come with that turbine ...it comes with a 63mm turbine only. The number 71 stands for 71mm INducer compressor and 63 stands for 63mm INducer turbine. Other turbos use...
09-29-2018, 04:20 PM
Replies: 10
Views: 592
Posted By Brettus

Also : you need to choose a turbine that matches...

Also : you need to choose a turbine that matches your chosen turbo .... The 70mm0.92 is wrong for the 7163. I think you will find that backpressures will be quite high once you rehash pressure losses...
09-28-2018, 11:27 PM
Replies: 10
Views: 592
Posted By Brettus

Here are numbers from my current setup that match...

Here are numbers from my current setup that match very well to what I see in reality .
...
09-26-2018, 01:50 AM
Replies: 1,847
Views: 171,652
Posted By Brettus

I would go with a twin scroll (T3 if you can) and...

I would go with a twin scroll (T3 if you can) and run 11/2" runners to the turbo from each end , siamese to wastegate and a small diameter balance tube from each outer runner also going to wastegate...
09-24-2018, 06:52 PM
Replies: 1,847
Views: 171,652
Posted By Brettus

I just replace my flexible intake with a solid...

I just replace my flexible intake with a solid one and seeing some good results for turbine backpressure .
Back pressure at 14psi with flexi intake :...
09-14-2018, 12:29 AM
Replies: 1,847
Views: 171,652
Posted By Brettus

So .......... had another crack on the dyno today...

So .......... had another crack on the dyno today . Red line is today's run , blue line is from march . Both were at 14.5psi so I could see if there is any major improvement . As you can see ,...
09-09-2018, 08:04 PM
Replies: 1,847
Views: 171,652
Posted By Brettus

This is a log at 6psi tapering to 7psi for last...

This is a log at 6psi tapering to 7psi for last 1000rpm . 313whp @ 7800 . Would probably make another 20 or so if taken out to 8500.
...
09-08-2018, 11:10 PM
Replies: 1,847
Views: 171,652
Posted By Brettus

Boost was jumping around at over 7000 but is now...

Boost was jumping around at over 7000 but is now very stable everywhere . Pretty happy with this

Logs indicating :
@7psi - 300whp (minimum boost possible at 7500rpm)
@10psi - 350whp
@13.5psi...
08-27-2018, 01:15 AM
Replies: 8
Views: 302
Posted By Brettus

75psi sounds very low but it depends on cranking...

75psi sounds very low but it depends on cranking speed .

https://cimg3.ibsrv.net/gimg/www.rx8club.com-vbulletin/990x800/80-compression_chart_330e12fac3f10e9c0c66a011698ff3bad7c572c5.png
08-26-2018, 11:00 PM
Replies: 8
Views: 302
Posted By Brettus

If the seals on the side of your rotors are worn...

If the seals on the side of your rotors are worn , gas can leak passed them from the combustion chamber . If this was happening it is likely your compression will be low also .
08-16-2018, 04:23 PM
Replies: 1,847
Views: 171,652
Posted By Brettus

Update : went to dyno yesterday . We took it up...

Update : went to dyno yesterday . We took it up to 14psi and 400whp and could see no improvement over my previous attempt plus it seemed to be dropping away earlier in the rpm range so we called it a...
08-12-2018, 10:51 PM
Replies: 1,847
Views: 171,652
Posted By Brettus

Dyno booked for Thursday ...................

Dyno booked for Thursday ...................
Showing results 1 to 50 of 159
 


 
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