Hey crcain, long time no talk to. I agree with a little knock produces the best power. If it's my own car, for maximum power, I like to 'skim' across a 2 to 1 count as long as it never pulls any timing. I also don't like to see 2,2,2,2,2,....1,1,1,.etc. Ideally for me, I like to see a 2,2,1,1,000000 or something similar. When I 'bump' the 2 count, I double check my AFR's and if that's where I want it, then I leave it. If the AFR's have changed any by the time I get my 2 count, I start back on the AFR to get it nailed to what I want, then go back to smoothing my other tables. The Mivec may receive minor adjustments if I think the 2 count comes up too easily. Hope my rambling makes sense.

 

good run man

 

One more thing. The above logs have not reached the target boost of 26.5 yet, so the 2 or 1 count isn't reflected in the logs. Typically on this tune, when we hit 26.5,26.5,26.5 then falling a little, we'll see a 2 or 1 count in the 6250 area too. This was just a bit cleaner due to lower boost.

 

crcain, On the 2 step, the timing is critical to building QUICK boost. An example: One night, while Jim was bracket racing, he didn't have any time to get the car up on the 2 step (due to being on it too long if he went wot after he staged), so I modified his timing map and I have the log to show that he made 25-26 psi in less than 2 seconds. I actually think it was about 1.5 seconds or so. Any, further testing proved this to be true. My experience is that the larger turbo can handle the lower timing for a longer period of time, better than the stocker can. The stocker is like on/off vs the T67 for example. Notice the timing map on Jims is 10 degrees in 2 step area, but 8 during low load shift points. This aids in detering the onset of knock.

 

LOL jeez. I have just about every bolt on possible with cams and a tme turbo that made 322 on a dynodynamics. And yet somehow a stock IX with two parts and a tune would cream me on any track in the country. Mad props.

 

Thanks very much for the props. We're having fun, and I truly mean that. The fun factor doesn't necessarily go up, the faster you go. As a matter of fact, sometimes quite the opposite. I think NHRA has it right with the 11.50 limit with no rollbar. That's plenty fast to have fun and a street killer at the same time. We're really anxious to reach the mid 11's, but not by just throwing parts at it. When we've reached our goals, we'll be able to look back and have a very small list of how we got there. The cost of that list will be much less than previously thought. Along the way, we're happy to take side trips to do some testing and developement of new products, like the Hoosier tires. Thanks again for the positive comments, that's what keeps us moving forward.

 

Thanks for your thoughts. But regarding the notion of retarding timing during spool, do you agree with what I said in my previous post? Discounting the 2-step / launch control of course.

 

Which 'during spool' period? On the street or at the track. Between the gear changes and recurring spool up? During initial spoolup on the 2 step. The between shifts and 2 step I have higher loads with reduced timing. On the street and between shifts spool up tracks are different. My logs show that by changing the timing, we increased the loads quicker. I have proof of that. On 2 step, the boost builds quicker. Not sure what area or conditions your talking about. Give me a specific area and I maybe I can find a log with that condition.

added: I also have noticed that 10 degrees in the 2 step seems to be the 'highest' number (most advance) that still shows any noticeable benefit of lowering the timing. 8 degrees shows quicker boost. 11 degrees didn't show much affect if any. Again, remember other factors/maps/turbos make a major difference. The T67/91octane I tuned noticed a quicker spool/boost, so I now have him at 8 degrees in the 2 step and between shifts.

 

9sec9 -
got a question about tuning. ive got my two step at 5500. also have another map with it at 6000. in both maps i have the timing for the rpm of the two step at 120 load=6, 140 and 160 loads=8.

it seems to build about 12psi after about 2-3.5 seconds. how would i build more psi for the launch?

also, please correct me if im wrong, but the more boost you run, the less timing you can run correct? also where does AFR play into more boost/more timing? i thought i had it all straightned out until i read this thread....lol

 

edited out. No reason to post old data.

 

mitsuevo803, If I were in Florida, I'd be bugging the crap out of Scott every single day just to learn as much as I could. The numbers and results don't lie. Thanks for the response Scott.

 

9sec9 is in town and it's not raining . The 9sec9/OKIX car is finished, and tomorrow we are going to re-decal it for our sponsors.

We will be going to the track with my car for a test and tune session tomorrow night at IRP just to knock the rust off the driver and sharpen the tune. Indy

 

OH SNAP! Good luck guys!!!

 

Good luck Indy! I'm sure with you and 9sec9 11's will happen this time! And I don't know about the rest of the community but with the 9sec9/OKIX car back, there should be some worried people out there! After all records are meant to be broken! Good luck guys! I'll be looking for the update w/ your 11 sec pass details!!

 

Really looking forward to seeing pics.