I will have to check the timing at the crank to confirm, but I have the timing synch at 15* with a 97-99 CAS. Cams are 3* retard intake, 4* retard exhaust, timing table posted in .pdf format below. I am currently running straight VP Q16 fuel.
I did some passes at the track yesterday with the current dyno tune in ridiculous weather conditions; 95 degree air temps w/ 90% humidity for an effective temperature of 117 degrees. Track surface temp was 137 degrees in direct sunlight all day. Tire pressures stayed at 18psi as it didn't make sense to screw around with them. The biggest thing was keeping the car cool enough to make passes and run my class. I couldn't 60-foot to save my life.
I had only 4 passes for the day. The first was a shakedown with anti-lag on with a dying turbo; it did 11.7 @ 140 with 97mph in the 1/8th. I had two vacuum lines pop off; vac line for boost controller from intake manifold, and two throttle body lines that were looped. The anti-lag didn't like a dying turbo so it spuddered out 1st and into 2nd, then started getting going at 50psi.
Pass #2 was a firstname.lastname@example.org w/ 1.78 60' and 116.55mph in the 1/8th. Easy pass, low timing from the heat. Heck, only saw 7 degrees of timing at the top of 2nd, 5 degrees at the top of 3rd and 3 degrees at the top of 4th. AFR's between 11.9-12.1 throughout pass. No knock. Short-shifted 2nd at 8400rpm, and 3rd at 8000rpm; redline is 9000rpm and power doesn't drop to redline.
Pass #3 was horrible with a 10.448 @ 151.33mph w/ 1.944 60' and a116.48mph in the 1/8". Timing was around the same.
Pass #4 was a 9.94 @ 151.03 w/ 1.708 60' and 115.16mph in the 1/8th.
I had ignition retard for 3 variables during my last pass yesterday; air temperature, coolant temperature, and knock control. Coolant temp was pulling around 2*, and air temp was pulling around 2*-4.5* from beginning of run to end of run. It also saw a slight amount of knock that pulled timing in the top of 2nd and 3rd gear. I ended up with around 9 degrees of timing at the top of 2nd, 7 degrees of timing at the top of 3rd and 2 degrees of timing at the top of 4th. It was noticably running too little timing due to the temperatures and the safety measures in place.
Here is a video of the passes I just put together.
Tim Zimmer - TMZ Performance - twicks69; Back-to-back 9's. - YouTube
We also have slow-motion and GoPro on-car video to edit and post up!
As for this turbo, the Borg Warner has severe shaft play which is hurting spoolup by over 1000rpm now and it will be replaced with a Garrett GT4202R, and the Borg will get rebuilt and shelfed as a backup turbo. I did not get any time to play with different housings on it because the thing lasted between 500-1000 miles only.
I really miss a good spooling, durable turbo that has a good powerband, so the Garrett goes back on the car. I gave the Borg Warner a try, and maybe I will go back to it again in the future, but not right now unless I run out of time to get other things on the car done.
As for stuffing aluminum rods into this engine; wow, that was a major chore! I would not recommend ANYONE to do it as it is a very delicate process of clearancing the rods, the cylinder walls, the block webbing, the main oil galley and the oil pan. It is not easy, and requires extreme precision when it comes to clearance tolerances with expansion ratios factored in.
Originally Posted by NDgsx
Looks good. Curious on a few things from one stroker guy to another if you dont mind sharing. Is the 8* sync'd (not sure what CAS you are running) or was it not counting base? I have found on mine and others at that boost level we can usually get more into them safely and really watch it pickup. This is me at 15* on my new setup-
I have run it at 18-19* without headgasket issues on the 3586(I realise you arent on E85) and Jeff's we are at 17* right now at 44psi. THe other thing I was wondering is if you had played with a larger housing or just the 1.1? We found on his that the bigger divided only made the car look laggy, it works very well in the real world. Of course we are on a 1.44 twin but you might find the 1.25 works better for you and keeps the motor happy.
Congrats for stuffing aluminum rods in that beast. I looked into it and gave up (on the 2.4) when I ground through the oil galley on my 94mm and had to sleeve the oil galley.