Just wanted to let everybody who cares know that I just picked up my new race motor today. It is a 4 port 1/2 bridge port using S5 internals. It has all of the really cool oiling system mods and looks great.

The ports look like works of art with the flowed street port primaries and the bridged secondaries. Big thanks to Joe at RPM. The guy was great to work with, went above and beyond collecting missing pieces and battling through power failures to finally finishing the motor today.

Man he even delivered it from Walkerton, saved me 4 hours of driving. Big thanks to Joe at RPM Performance.

Great work and a great guy. Going to install it tomorrow and fab-up a temporary intake using a Turbo set-up and the factory S4 ecu.

Going down to Shannonville on Monday to break-in the motor at the Image lapping day. Can hardly wait 250-300 miles of brap-brap-brapping around the track slowly building revs. Until by the end of the day we will be up to 8000 rpm.

Then bring the car home, change the ecu out to the Megasquirt that Renns will help us with tomorrow, repack the front wheel bearings, bleed the brakes, wash the car and re-load the car to go racing at Mosport next weekend. Then after next weekend, finalize the ITB setup and get some more HP.

Should be tons of fun with the additional 50+ hp (210-220 rwhp) and we expect to be very competitive in TGTC from now on.

I can hardly wait.

Eric

 

Joe's a good man....Good luck with the new engine, I'm going to try and get out to Shannonville on Monday as well....If so I'll see you there..

 

I'm envious! See you on Monday...not sure if I'll be running my own car though. I stripped a hole in the LIM so the UIM is only held down with 4 of 5 bolts...don't think I should run it at the track like that. I'll have to get it helicoil'd.

 

nice!!!....now he get get to work on my port job - haha

What oiling mods did he do for you?

 

See you there. I will not have my car on the track either since the "race" oil cooler is sitting beside its shinny -12an earls fittings will be sitting on the work bench!

 

sounds like it will be a great motor.

i am really interested to see how the ITB setup turns out...did you end up having seperate primary and secondary runner channels, or is it just channels seperated by rotor chamber?

and who/where will you be tuning the MegaSquirt?

 

joe builds good motors!

good luck with it!

250 miles seems like a pretty quick breakin!

 

Classicauto - The oiling system mods are an increase in pressure to 110 psi max, bleed jets instead of the stock ball and seat. We also changed to a TurboII oil pump as well as the standard thermopellet replacement.

Coldfire - The ITB intake is a separate runner for each port. Simple easy to package and seems to work very well for the Aussie guys. Just needed to wait for the engine to be finished before finishing the manifold to determine if we were going to use a 6 port or 4 port motor.

Regarding tuning it, we will be doing it our selves. We are putting in a base map at Renns today and then fine tuning it on track next weekedn. It is fairly easy to get a base map that will run clean for a race motor. As you are operating at full throttle most of the time and you really don't care about emissions or fuel mileage, all you really care about is, does the engine pickup the throttle cleanly and does the motor run cleanly at max rpm.

After we have a race weekend on the setup and everything is running clean, then we will go to a chassis dyno and max power under the varying load points. Then we will run a test day with the new setup to see if it runs well. If everything is okay we will convert to the ITB setup then tune to improve the mileage and idle. Big issue with the Megasquirt is that there are really no supertuners with that type of system so we are going to stumble through it ourselves.

Terrh - the break-in is according to Mazdaspeeds recommendations. Cutting to the chase gives you the following break-in schedule:

30 to 45 minutes at idle

60 miles under 5000 with minimal loads (or 40 laps at Shannonville)
60 miles under 6000 with moderate loads (or 40 laps at Shannonville)
60 miles under 7000 (or 40 laps at Shannonville)
60 miles under 8000 (or 40 laps at Shannonville)

Then change the oil.

It needs another 60 miles under 8500, but I am running a stock S4 ecu for the Monday break-in so we can't pull over 7800 rpm on Monday.

I will need to be very careful during the first practice, qualifying and race next weekend to not really lug the motor too hard as that will finish off the break-in.

For the second race on Sunday we should be good to go.

Eric

 

that's a decently agressive break-in schedule. interesting.

what i meant about the ITB, is that do you have one throttle feeding more than one runner?
it sounds like you are just using the classic setup of having a throttle body feeding both the primary and secondary runners for each rotor, but each runner (4 runners) is seperate. so two TBs, correct?
i want to see somebody try a setup with a throttle body shared between both primary, and a TB shared between both secondary. this is what Mazda has used on their stock manifolds, race cars, etc.

well hope everything goes smoothly. maybe get some video of the engine/car in action?

 

Yep a very aggressive break-in, but I assume Mazdaspeed knows what to do. We did this on the last motor and it ran fine for a couple of years. Funny but Danny Manning says that if a motor is going to blow, it does it within the first 100 miles. I am going to trust Joe at RPM Performance built a great bullet. It sure looks good.

Sorry the runners will be one to each primary and secondary. 4 throttle bodies and 4 runners. I will not be able to build one like you are looking for at this time.

Will try to take some short videos on Monday.

Eric

 

We did the engine break-in on the FD racecar here in Ottawa on the dyno. That's racing. You can't putter around for a 1000+ km's hoping for that optimum sealing when you have to race the next weekend.

Race engines aren't expected to last 100 000 km's they way everyone here wants anyway.

Also, Mazda Motorsports break-in recommendations are far different than conventional street numbers.

 

Eric: are you around Saturday? Can't make it monday, but you should try my ECU. I don't know how rev-limited it is.

 

We will not be able to go Monday now. After cobbling everything together to get it to run, we cranked it until oil pressure came up (20 lbs at cranking speed, looking good) flicked the ignition switch and .......BRAP, BRAP, BRAAAAAPPPPP. Its alive.

Problem is the car wont pick up the throttle well. It will idle and slowly increase speed, but not willingly. Not what you want when you are breaking in a new motor.

Guess thats why everybody says you can't run a bridge port on a stock ecu.

Dave and I bumped heads together and decided to just go ahead and install the Megasquirt and individual throttle body setup.

It will take a few weeks, but then everything is good and solid and "ADJUSTABLE".

We will then look for a lapping day to breakin before the 26th weekend.

Eric

Just a bump in the road I guess.

 

Sorry to hear that Eric.

 

[QUOTE=23Racer]

We will then look for a lapping day to breakin before the 26th weekend.

QUOTE]


Bring it to Dunneville on Aug 20th...