The TS was done mail-in. So Osiris cannot be done in real time on a dyno (besides Shawn at Church?)

If Osiris would be no better, I guess I should go ahead and get an ems, B/w the Haltech and the HKS F-con v-pro, which would be the way to go?

I guess I would go to Tuan and GRD--he's the only local tuner I know that I've heard good things about.

 

Do you have access to the electronic files? They should be emailable.

 

I do not currently have access to the electronic files, but the shop has them on their computer. I will call them tomorrow and see if they can e-mail me the actual dynojet data files.

 

The UpRev guys can do it in real time on their dyno in Texas. Others might be able to... I don't know who. The real-time version of Osiris is scheduled to be released in a few weeks... you could wait for that... Since you are going FI, I'd probably wait and get a hardware EMS system.

I like (and have) a Haltech. It's a great system. You might want to see which EMS platform your Tuner supports before you buy one, though.

 

Wow what a difference. Thanks for posting. It looks like it leaned you out quite a bit under 3k.

 

hopefully another reflash, possible ems can help me out w/ that

Just goes to show you how great Motordyne's products really are.

 

the problem though is that TS has done many many cars with the spacer, and I bet next to none with the Cosworth - so the results, while certainly interesting to see, are not really apples to apples

it will be good to see when some more people post up before/after cosworths with fully tuned results, with cars tuned on the spot vs mailorder

 

I tend to disagree... if you watch the A/F curves you will notice that they only differ at the beginning, where the ECU remained a little longer in closed loop in the Cosi run (most probably because the battery had been dicconnected while installing the plenum). After 3400 rpm the ECU is clearly running in open loop on both runs and the A/F curves match perfectly, so no advantage for neither plenum from the A/F side. Just over 6500 rpm the A/F curve of the Cosi run is slightly leaner, evidence for its higher flow capacity, which in turn gave a few hp over the MD run, due to being closer to optimum A/F ratio for maximum power.

All in all the Cosi did not make any more peak power, nor did it have any other advantage. Quite in opposite the MD combo made the highest peak power and torque as well as delivering more power and torque up to 6500!

My prelimenary conclusion is that the Cosi will only show benefits with long duration cams and higher rev limit or f/i appplications.

 

Yes, this in true. Actually the response from TS was:

"took a look at the post on the forum.
Since there is no drastic change on the A/F reading on both plenum,
result seems like the characteristic of the plenum it self than tuning
issue to me.
Cosworth plenum seems like to be more efficient at really high RPM, it
may work well with radical camshafts.

The bottom line is, if the intake runner is long and small, it will make
more lower end torque, but if it is shorter and bigger, then it will
loose torque but gains at top HP."

Tadashi Nagata
Technosquare, Inc.

However, I will be working with Shawn from Church Auto on tuning the setup with Osiris. Hopefully, his expertise and the abiltity to alter cam timing/angle will show improvements.

I am also waiting for the HKS GT s/c to be released, so I'm not wanting to swap out the cos plenum back to the MD setup.

It has been suggested that I should check for vaccum leaks as well. But I do not notice any issues with idle or hiccups when running.

 

+1 This is what I was thinking.

If the Cosi leaned it out significantly then yes, it would make gains in the lean areas... but everywhere else, there really is nothing to be gained.

It seems additional gains will have to be made in conjunction with other significant modifications.

Large cams? Possibly.
High RPM while NA? Possibly.
So far the Cosi seems to show its advantage to FI at high boost.

 

well the car most definetly feels slower, especially in the low rpms.

I dunno how accurate the fuel mileage is on the navi info, but driving b/w 2-3k ireads 6-8 mpg. Driving b/w 4-5k it jumps up to 12-14 mpg. The guage on the dash is going down quicker than it did with the MD setup.

I either have to get tuned correctly, or it's coming off and the MD setup going back on.

 

@jonnylaw: regardless of the current results (be patient and do a custom tune..) I think you made a great job in handling perfectly all the install/pics/dyno/graphs of the Cos-manifold!

I think we all enjoyed your efforts and very curious to see the next developments!

Respect! Job very well done!

 

+1
Good reporting. And with good pics to boot!

 

thx guys. I'm working out tuning options right now. Hopefully I'll have some updates soon.