Bathurst

Just blew my new motor. Can it be that my timing is too advanced? how do i check and how do i retard?

Also when is the anti-detonation device coming out.. or is it already out... where can i get it from....

whats the difference between this anti-detonation device and the J&S knock system??

Also please tell me how to run-in a new engine with old housings in good shape...

Also I am getting the Rotary aviation master rebuild kit... Any reviews? Along with the bruce turrentine rebuild video.. I am a first time rebuilder any precautions...

thanks

Mahjik

iTrader: (1)

Unless you have an aftermarket ECU, then it's extremely doubtful it was timing that caused your problem.

dubulup

get lots of zip lock bags, freezer and small ones. Don't forget to label things. Digital camera helps too.

rynberg

As Mahjik said, there is almost no chance of timing killing your motor with the stock (or most likely, the Pettit/M2) ecu.

You need to figure out why your motor really blew before it does it again. What mods do you have on the car and how many miles were on the motor?

Also, if you blew an apex seal(s), your housings could be trashed.

Bathurst

I have an Apex-i Power fc... I have not changed anything. I mean i am running it out of the box. Altough i did ask the guy who got it for me to have it tuned for 14 psi on stock turbos.... How can i check if the pfc was the culprit?? where do i need to go through the commander and what should the settings be??




Exactly what i am trying to do. I can not have another blown motor...I have the following mods

Apex-i N1 cat-back
Apex-i Intakes
Apex-i GT Spec radiator
Apex-i Power Fc
Knightsports Dual downpipe
Greddy e-01 boost controller
Greddy SMIC


Yes one of my housing is trashed... blew the apex seal on only one rotor... I have a good housing from my old engine which i plan to use... On the surface i have checked and there r no scratches... some very slight maybe...I mean very slight... can that be a problem??

rynberg

You can't do a mail order map for 14 psi....for one, your fuel injectors were probably being maxed out. If you want to run higher boost than 10-11 psi, you are going to have buy a wideband and the datalogit and learn to tune yourself (assuming that there are no PFC/RX-7 knowledgable tuners in your area, which is probably a pretty valid assumption!).

Tuning the fuel portion won't be that difficult, you'll just have to make sure the a/f curve is smooth and rich enough. As for timing, I wouldn't change anything from the default maps except for fixing the two negative split cells. You could also ask Jason at the rx7store for a safe map appropriate for your mods (I'm not sure if he charges anything, but he has a lot of good, safe maps).

Unfortunately with this car, there aren't easy ways to big power, unless you count the Pettit ecu. That would probably be a good solution for you if it would work in your car.

Also, if you want to run 14+ psi, you will need larger injectors and fuel pump.

rynberg

Actually, to be safe, I would reset the PFC to erase whatever maps has been put in there. Add 3% of fuel to the cells above 3k rpm and run with that until you get it tuned. Keep the car at 12 psi or less.

Mahjik

iTrader: (1)

And that's exactly why you don't buy a programmable ECU unless you are going to have it tuned on the car.

Bathurst

Actually the motor is gone. I just ordered the master rebuild kit from Rotary aviation... I have heard good things about them...Any comments? Also the car is in the workshop right now and i am waiting for the rebuild kit but i want to rectify whatever made my old motor go... It had less than 2000kms on it...

I was running less than 12 psi on the car...



You are right there are no rx-7 tuners here. How can i tune it myself to safe levels... and how do i find out if my power fc map was the culprit?

twokrx7

iTrader: (1)

If you are left to tuning it yourself, get over to the PowerFC part of the Rx7 forum and do alot of reading.

Many of us have purchased Datalogits and widebands and have had much sucess tuning our own cars.

Good luck with the new motor, better check those turbos as your broken apex seals may have damaged the turbines.

Bathurst

I definatley will check the turbos. Did not drive the car for long after i felt something was wrong.. less than 6 kms.. just from my home to the workshop....I hope the turbos are ok...

Also which is the best wideband o2 and where can i get it?