vipernicus42

iTrader: (4)

Hey Guys,

Well, John had his official Mazda Digital Rotary Compression Tester at the Ottawa meet, let's hear how you all did.

Engine: '84 12a
Condition: Stock 185,000km
Front Rotor: 7.2, 7.2, 7.2 @ 300rpm
Rear Rotor: 6.8, 6.9, 6.8 @ 285rpm

Diagnosis: Borderline. Expected result from a stock engine with that many kilometres. Landed right on the "minimum compression" line on that graph on the back of the tester. As long as it's lubricated it'll last me until I rebuild it.

Jon

eViLRotor

iTrader: (2)

BTW, the tester is not mine.
It was loaned to us by Ted, one of the racers Nik and I are helping prepare their GTS series race FD.

So all the props to him.

We are all glad such a cool item could be put to good use.

HEVNSNT

iTrader: (3)

Ottawa once again a great meet rain or shine. At least on the saturday that I was there.

I knew I should have stayed in bed. I blame Chooks for showing up at the KW meet point. Next thing you know I'm in Ottawa! LOL. I've found some way to get to Ottawa every year for the past 5 years now.

Thanks Will and Stace for hospitality time and time again.

And BTW, I set the cruise on at 120Km/hr and drove the FD home 570KM and it is just touching the E on the fuel gage. Yes that is 600KM per tank on the FD! Woohoo.

Feds

Front: 4, 3.5, 8.6
Rear: 17, 91, 2

Still pulled a 300C on the QEW last night.

MyRxBad

Sounds like you had a good time. Wish I coulda been there.

vipernicus42

iTrader: (4)

WTF? Those numbers are forkin' weird. 91kg/cm2? Crap that's so much compression it'll turn the carbon in your engine into diamonds

Jon

Amur_

Feds designs charcoal canisters for KIAs. 'nuff said.




[edit] Lookie what I found. Now who was driving a green FB?

dufourmike

iTrader: (1)

so fed has a worn engine, and he pulls on cayannes?(sp?)

Feds

Feds pulls on FD's with 7 lbs of boost.

Compression numers are for pretenders. That GTech said 6.5 to 60, and I'm more than happy with that.

Neo

iTrader: (4)

Denial, step 1!

vipernicus42

iTrader: (4)

I'm just happy someone beat my low score

Jon

dufourmike

iTrader: (1)

step 2:

Build a bridge for when this motor wears out

coldfire

iTrader: (1)

i don't remember mine exactly...must be the exhaust fumes.

mine were all between low 8s and 9s. Rich, you got a picture of mine?

Terrh

iTrader: (7)

yep!@ compression numbers are for posers. My old engine had 12PSI on 1 rotor and 30PSI on the other rotor, aside from being a bitch to start it wasn't down any power.. probably still made 250hp. yay for turbochargers.

eViLRotor

iTrader: (2)

-Nik's well broken-in Half Bridge engine was 7.5 or so on both rotors.

-Brianna's car with the j-spec of unknown origin and mileage, was pulling 10's and 9's. Although, the difference between chambers was not ideal.

coldfire

iTrader: (1)

in theory, if all seals remain intact and no major damage is incurred to the internals, compression will actually INCREASE slightly due to carbon build-up. a lot of piston-bangers actually experience knocking since the increase comp can be significant enough to cause that. don't know if that ever happens with rotaxes...

Amur_

Unless it's in the vid, nope.

eViLRotor

iTrader: (2)

Just tested my GSL-SE. 128121 miles (204 993 km) original engine.

Front Rotor: 9.4-9.4-9.5 @ 215 rpm
Rear Rotor: 9.8-9.8-9.9 @ 218 rpm

Minimun at those cranking speeds is 5.3.

coldfire

iTrader: (1)

nice numbers...so, this all proves that we should all leave the engine building to Mazda

IAN

iTrader: (3)

Nice numbers. I've seen some cars with half that KM pull half those numbers. LOL

eViLRotor

iTrader: (2)

I think it proves that NA engines, as long as they are treated well, take a long long time to wear out...

pd_day

iTrader: (6)

Yo, those are pimping numbers ......

Leigh Adams

when you drive like grandma, you get numbers like that!!

eViLRotor

iTrader: (2)

Haha...you a funny man, L'eaquhizatae

pd_day

iTrader: (6)

I wonder what Kneeho and IAN's numbers will be ... hmm...

Must be shooting 15's !