How long does your hi power engine last?

[Carl]

Hi to all in OZ and NZ,
I have a few questions for you.
We see in the southern hemisphere in Fast Fours and rotaries some great cars with hi power engines.I would like to know
in hi power turbo engines say over 450 hp what sort of life expectancy are you getting from your engines?
What sort of rebuild are you getting?
Also what is your car being used for,street or drags or circuit?

I ask this to get an idea of how long hi power engines are lasting,no need to mention builders if you don't want, just some idea of the above.This includes 13b and 20b.
Kind regards
Carl:) :burnout

[Carl]

Does the lack of replies mean that there are few people in Australia and NZ on this site?
Or is it that no one wants to give an indication of how long their hi power rotary is lasting?
Even some thoughts would be appreciated.

Kind regards

Carl:)

[MikeLMR]

Might be worth asking on here ... www.ausrotary.com

[richrx]

thought clive would know about that site already:confused:

[FDRZRich]

It was Carl that asked!:rolleyes:

[richrx]

D'OH:rolleyes: SORRY CLIVE AND CARL

[RX3ROTOR]

it all depends who does the tune of your car and the rebuilds etc....mazfix in brissie do all my work and i run an 20b turbo combo in my rx3 and is street driven every weekend..with the odd race or too...has been in car for 4 years now and never blew up and was standard import motor , not modified internally at all and had 500+hp to wheels on 18psi....i pulled apart for more hp at christmas and is all done , race seals , dowelled , ported etc and now makes 620hp to wheels on 19psi...so if the rite people do the job it lasts for a long time...cheers

[t2rew]

ok so whats the key to lasting power.. the parts all have to go together in a cetain way so i spose its the fuel and ignition. what should we be looking for from the tuners over here. is there a secret lamda to set it to or a cetain amout of timing advance..


give us some clue's

PLEASE

[RX3ROTOR]

to start with the i will list the mods in order you should perform to achieve this...change air filter to k+N or similiar, bigger hi flow exhaust from turbo back, change efi computer to microtech..comes with bosch coils..these are made for rotors and work the best, front mount intercooler with bigger pipng, bigger 10mm leads, ngk plugs egv 9,s or egv 10,s ...then new turbo to4 garret roller bearing which has to be for rotor , with new exhaust manifold made and custom external waste gate ...all these mods are bolt on and will bring an standard s5 motor ..no turbo mods to 300+ hp to wheels and good for 11second 1/4 mile..or with turbo mods make 400hp + and good for 10,s at drags..with this power your car is an weapon on streets also....if you use standard computer with piggy back option etc..they dont work really best to change..and for timing advance 15 degrees most on standard motor..good place to start....if you buy stuff get from oz ..ie mazfix in qld..would be cheap with aussie dollar also...hope this helps..cheers

[t2rew]

mmmmm.... 10s 1/4:D

[MikeLMR]

Well thats a 10 second engine but then you need the rest of the car to go with it :eek:

Gearbox, diff , tyres , suspension ... mucho £££££'s

[RX3ROTOR]

yer in older school rx,s you need everything replaced in driveline..but there are heaps of s4-s6 rx7,s with standard boxes and rear ends in them running 10,s without to much dramas..the later model stuff is pretty strong and all the old school mazdas fit these g/boxes also...cheers

[MikeLMR]

oops, yeh the later cars are much easier

but building a quick 3rd gen is no fun as everyone expects them to be quick ;)

[Archbish]

Bloody hell - 10s!!!

What is the current UK rotary quarter record - the quickest I've heard of is 12.37 by Geff at totb...

[RX3ROTOR]

yer theres plenty of rotors over here from 1982 - 1996 model rx7,s etc that use standard drivelines mainly..that run 11,s easy on street tyres..and then bolt slicks on for 10,s...people been doing it for years now...they think an 11 second rotor is a bit slowish now..has to run 10,s or quicker...either way its geeting out of control..cheers:rollin

[Archbish]

but how long do the engines last??

And are they manual or auto (be careful - luxury-box owner here...*grin*)

[20B_boy]

Geff's would do 11's if he had 5 minutes to work on it - no probs! Change the turbo and it'd do 11's pretty easy I reckon.

He made 12.37 at TOTB.

I made 12.74 in it on my 3rd run ever up the strip.

I cant launch for :censored::censored::censored::censored:. And Santa pod is :censored::censored::censored::censored: for traction. And it was heat soaking real bad (had to sit and wait for umpteen bikes to run first :(). And it was running way to warm cause the damn radiator didnt want to fill proprerly. And one of the bolts for the down pipe was missing. And - its only running 11-13psi!!!

I dont think the gulf is THAT big. Glenn - veteran of many a drag meet in oz - was amazed how slippy pod was compared to back home.

The excuses are endless!!

R.

[Archbish]

...and a girl was driving...

[AVENGE]

The 13b in my Street RX-4 puts out 490rwhp on C16 fuel through an auto and standard RX-4 diff. Its run 9.7 @ 138mp/h and after being in 3 cars over a 4 year period, its come apart for a rebuild. It ran in the 8s at over 150mp/h in my racecar and with the exception of porting, is totally standard, no dowels, no tricky seals. Just a big intercooler to keep air temps down, and a Phil Laitrd tuned MoTeC ECU calling the shots. Ignition is MoTeC CDI. The parts to rebuild it cost aus$1100.00 and now its good as new!

The Datsuns 13b has made over 900hp on Methanol and gets pulled down every meeting for inspection. It runs a roller bearing 2 piece crank, and uses Hurley or PTS seals, no doweling is used and as always the Phil Laird tuned MoTeC M800 ECU and CDI 8 ignition are along for the ride. The engine requires a lot of maintance, but we have never actually broken anything.

The tricks to long engine life. Good fuel, correct tuning, low intake air temps and keep the revs under 9800rpm! :):)

Marty

[travellinbob]

Hi Marty, that is one impressive engine in your rx4! I know I should be even more impressed with your race engine but to be honest for the times you are doing I kinda expect stats like that.
It is very interesting to hear that you dont have dowels( in the rx4 ) And that the standard diff is still in the land if the living!:eek:
There do seem to be alot of guys on this forum who talk about how scared they are about blowing up their engines, and how it is the main reason why people are put off from buying mazdas in the first place. I wonder why (mainly fd) owners have so much trouble over here with their cars. I know that there are quite a few very good builders of engines here so it is a bit of a mystery.
By the way I think that there is a current topic just like this at the moment on the ausrotary forum. Might be interesting to check out if people are replying well to it.
cheers, michael.

p.s Marty, is the rx4 you talk about the silver/grey thing that used to have sub_11s number plates? if so then I saw that race at the old creek one wednesday night and it has stuck in my mind ever since!

[AVENGE]

Yeah its the silver/grey one, and it still has its SUB11S numberplates. I thought about changing ythem, but everybody knows the car as SUB11S. We get away with running the standard diff because its auto, [2 speed powerglide] but i wouldnt fancy its chances with a manual. :)

Over here we have a couple of fds running low tens at well over 130mp/h with standard gearboxs and diffs, you hear of a few breakages, but not may.
What problems are you guys having, mechanical failures, or is it more to do with tuning ?

[travellinbob]

Do any of the extreemly intelligent moderators that we have think it might be a good odea to move this thread to the perfprmance section? not too sure how many people will respond to it here and it does seem to be a very interesting topic.
cheers.