Brettus

iTrader: (2)

Thought I may as well start a new thread for this seeing as there are significant differences between this set up and the last .

Engine :
Doweled
RX7 (deep) ALS apex seals
Brettspeed modified centre port runner (removed after unsuccessfull tests)
Rx8 performance engine mounts

Turbo :
Rebuilt Greddy
60-1 compressor wheel (same as BNR)
Clipped turbine
fabricated 60mm intake tube
internally polished Greddy outlet pipe
600x260x75 Intercooler

Gearbox :
5 speed ex JDM RX8
Ratios :
5 speed vs 6 speed g/box
1/3.483..............3.76
2/2.015...............2.27
3/1.391...............1.54
4/1.00...............1.19
5/0.76...............1.00
6/.....................0.84


Clutch
Exeddy stage 1

Fuel :
Walbro 255 pump
yellow/yellow/blue injectors
upgraded 06/2013 to yellow/blue/uncapped yellow 380/480/600

Tuning :
Mazdaedit/Brettspeed



Engine is dressed and almost ready for install at time of writing . Currently just tidying up a few loose ends.

Goals :

350 WHP on 11PSI
12s 1/4 mile
last longer than the last engine : 40,000 miles

Chris

iTrader: (10)

good luck Brett.

9krpmrx8

iTrader: (46)

Nice work, did you grind those seals yourself? Glad to see you are almost done.

wcs

iTrader: (2)

Looking forward to live online tuning session Brett has promised.

LOL Ok ... he didn't

Looks awesome Brett

ShellDude

iTrader: (12)

free maps!

olddragger

iTrader: (3)

looking forward to this thread. I am a little surprised you went with the 5 speed. I would have thought that the s2 trans and a 4:77 diff would have been used. See how much I know?

shr3da

Thanks for keeping us updated, interested to see final results.

yomomspimp06

i just feel like you could take advantage of the boost with the 5speed. care to enlighten me on why you think he s2trans and 4.77 diff would be better?

Brettus

iTrader: (2)

Thanks Chris

No internal engine work for me ...no

Thanks - ve shall see.


Nyetski


S2 trans Practically unprocurable in NZ . Besides, I think 6 speeds is too many when you have all that torque/power on tap.


Cheers

Slidin8

Looking forward to seeing if your magical Brettspeed centre port runner works

olddragger

iTrader: (3)

I do love my 6th gear for the interstate cruising! But certainly understand your position and in that case the 5 speed makes good sense.
For 350 rwhp I thought you would need more injector flow than yellows and blues would give?
Are any of them un capped?
Really looking forward in seeing what kind of exhaust setup you end up with also.
Are you going to be doing any oil passageway/regulator work? Any oil pump work?
I know yall have cool temps where you live ( beautiful country!) but any waterjacket work to be done?
Cam ( Pettit racing) swears by increasing the coolant flow around the sparkplugs. I actually have a "freezeplug" looking plug between the lead/trailing sparkplugs where he accessed the coolant jackets and did his work on increasing the coolant flow in that area. I thought I would share that with you just in case you may be interested in doing the same.
At this power level are you still planning on using the oem ignition coils?

I have a feeling this will be a long and informative thread.

Brettus

iTrader: (2)

+
The 5th in the 5 speed is taller than 6th so i can see it being better for cruiseing . All the other gears are taller - which i think will be a good thing as well .

I did my 333 dyno on red yellow blue which i know was close to the wind . I'm actually thinking I'll get more power for less air flow this time so should have just enough for 350 on yellow/yellow/blue.



Nothing unusual in the exhaust setup . Will be fixing up my Trust Ti setup and putting that back on along with the stock 'gutted' midpipe . No changes to the oil pressure at this stage . Although I might change my mind once my old engine is opened up and I can see how the bearings have fared . My engine builder was against increasing the pressure saying it generates more heat in the oil.



Too late for any of that ! Might be ordering the Mazmart pump which should help .
Do you have that OD ?

Nope - I have had D585s on for about a year now.

Darkness8

iTrader: (2)

subbed

9krpmrx8

iTrader: (46)

Will you be posting pics of the old engine once torn down?

Brettus

iTrader: (2)

If there is anything of interest ... sure

9krpmrx8

iTrader: (46)

Cool, I have yet to see a boosted one with this many miles torn down.

olddragger

iTrader: (3)

Yep I do have that cooling jacket mod Bret. Cam told me it prevents the housing cracks around the sparkplugs that are sometimes seen.

Sorry I didnt realize you had the d 585's.....

You may want to ditch the oem midpipe--gutted or not. I think you will find that there is an advantage to a true 3 inch exhaust and one with straighter angles.
I will pM you.

TeamRX8

iTrader: (25)

finally, a thread worthy of this forum area

Slidin8

This!

And no Isuzu V6's!!!!!!!!!!!!!!!!

Brettus

iTrader: (2)

Found a crack in the Greddy manifold INSIDE it on the wall for the siamese port . Could delay things a bit getting this welded up .

JIN13

Sucks about the manifold, good luck sounds like a promising set-up

Slidin8

Or just get a tubular manifold made

Brettus

iTrader: (2)

Ha - I would like it back on the road soon .....

Slidin8

Haha fair enough mate

Slightly off topic, but since you track your 8, what is you wheel,tyre and suspension set up?

If you don't mind me asking

FazdaRX_8

iTrader: (1)

Good luck with the new build, look forward to seeing progress, and the tear down of the old engine, they may be a whole other thread though!

I didn't know JDM had 5 speed rx8 trannys, is it really a rx7 tranny?