ggavgg

i have a boosted 8 that needs a new motor since theres low compression in the rear rotor.....(greddy t618z with ap full exhaust)

what i need help with is .. what should a do i have the money to pick a motor up and install it but i want to no what can i do to make it last (p.s i wana keep the turbo) as in ... how much boost should i be running and what kind of special maintenence to make it last.....


anything helps.. plz jus dont tell me to take the turbo off

dannobre

iTrader: (3)

Most important thing is to have it tuned

Other than that...most of the rest of it are normal maintenance mods

You could go to the Sohn OMP adapter and separate oil supply...and pre-mix....

Brettus

iTrader: (2)

I had Esmeril apex seals fitted and they seem to be holding up well .

also , read this thread :
https://www.rx8club.com/series-i-major-horsepower-upgrades-93/how-make-your-renesis-turbo-sc-engine-last-187240/

ggavgg

how would premix help??

swoope

iTrader: (5)

its like lube for tuning!

beers

bse50

Waking up and reading swoope's posts is the best i could ask for.

swoope

iTrader: (5)

beers

olddragger

iTrader: (3)

like the others have said and:
add a water meth system and monitor your charge intake temps.
Keep a strong ignition system.
dont run oil less than a viscosity of 10w/40 and make sure the oil has a high level of ZDDP.
keep your coolant temps under control. 200F or less.
change oil every 3K miles.
run the S2 oil filter
when you buy an engine--get one from a known reputable builder
limit your rpms to 8K
od
get the Mazmart oil pressure valve mod

ggavgg

what is the meth system./meth injection...
and ur sayin no synthetic thenn... hows 5w30...how do i keep my coolant temp at 200f...sorry for my noobness in this

wcs

iTrader: (2)

Geeeesh I'm sure to get a new one ripped for this, especially since I can't find the thread now .... but here I go

There is some posts by MM (somewhere) about his experience running meth on his car?

In a nut shell -- basically by the time you add enough meth to prevent detonation you've displaced enough fuel to severely impact the horsepower.
While if you just add more fuel you will get the same safety against detonation while not impacting performance.....

I'm going to keep looking for those posts.

Sorry if I'm way out in left field here....

Brettus

iTrader: (2)

while he might be correct in that . Water/meth still does offer better protection than a rich mixture . EG what if you run lean for whatever reason ....

wcs

iTrader: (2)

I thought it might have been in the Pettit Super Chargers Owner thread .....
(damn there is a lot of bitching and moaning in that thread)

Ok Brettus, I'll except that ... however I'm not a big fan of the what if game...but I'll play

What if you run out meth ... now you're in a lean condition again.

Not to pollute the OPs thread so I end just with this for thought.

Is it more likely to get a lean condition from:
- Running out of Meth
or a
- Boost spike

<shrug>
I dunno, I'm running nitrous right now ... but I'm seriously considering going with a turbo as a winter project (thus my interest)
I've got most of the supporting mods in place just have to commit to a turbo setup <rubs hands eagerly>

MazdaManiac

iTrader: (3)

No, it doesn't. It is just cheaper.
A rich mixture continues to make power. A W/M system always costs power since it has no intrinsic fuel value until you are over 50% concentrations.

Brettus

iTrader: (2)

You can still run lean for various reasons even if your tune is rich - which was my point .

Also : most guys running meth do so for safety only and a failure in the system is not going to be catastrophic because the tune will support running without it .

So to get catastrophic failure whilst running meth you need two things to fail IE the meth system AND something else = highly unlikely .

Brettus

iTrader: (2)

https://www.rx8club.com/series-i-major-horsepower-upgrades-93/meth-water-injection-revisited-206956/



Any thread where MM posts seems to generate such behaviour LOL

wcs

iTrader: (2)

Ahhh ok ...
So tuned without the consideration of the meth.
The meth is added later as a safety .... ok

I feel bad for hijacking this thread ...

If you tune to run without meth ... then add it afterwards .. have you not in fact changed the conditions for which you tuned?

Does not the addition of the meth not displace the availability of air to burn ....

So now you are running richer than the intended tune, plus the added protection of the meth .... right?

wcs

iTrader: (2)

Thanks, I was still looking.

Miller time now!

Brettus

iTrader: (2)

I'm really only theorising here - MM has the practical experience with this so perhaps he can answer that