Interested in what data others have with the mods they have if they could be listed. The basic data and what I should see. My mods are listed but I only logged psi once and got 20.6psi. I expect it would produce 21-22psi with good intake air.
Timing is what I would like to see if anything. I have the 70mm SC pulley and a 178 crank pulley.
Today I found one of the 2 small vacuum/boost rubber lines that are located by the drivers side/rear on the SC having but a thread holding it there so I took care of that. So here are the stats I have:
1. Boost: call it what I have seen, 20.6psi
2. I have to check the timing again under WOT boost condition and this is what I would like to know what you have.
3. I am running 550cc injectors, a 450cc tune for running TORCO+1.5* of timing. The TORCO was run at the full amount of octane it could possibly achieve. Since the timing is a bit high I run an AFR I believe is rich enough to prevent harm. 11.6 is about as lean as the motor sees. I remember Jim(quickest Crossfire V8 at 12.2 but his is pretty much a race car. I am primarily interested in torque since much of the driving is part throttle, interstate passing, quick response conditions. So I compensate by running a richer AFR than some. 11.2-11.7 is my target range. My timing is what I will log once I find a safe spot to run hard in 3rd gear. I am thinking the most timing the motor should see would be 22*?
Mods being considered are exhaust work: A Magnaflow TRU internal x-pipe to replace the rear cats, a Magnaflow "Y" to follow the Muffler, resonator delete with a Borla Pro XS for the rear muffler. Borla's DO NOT DRONE I have to get a good looking set of tip(s) for the Borla. I may even add a round;internally baffled(perforated) muffler if there is space. maximum power done quietly.
I'll do a run with the Euro datalog software and list the timing in 3rd gear from shift into and shift to fourth & log here within a few days. Thanks all, sweet

 

i have 19 psi of boost and runing on -22 degrees at fuull throttle, the timing is depends on tune,spark plugs,iat temperatures, if plugs are good and iats are low timing at stock car is 14 -15 at full load, and 22 is on my tuned car,

 

I logged during my second heat at the track yesterday. It was in the upper 80's and 100' above sea level.
See my signature for my modifications.
Max boost 18PSI
Max timing 26.5º
AFR's mid 12's until hot then it dropped to high 11's. I was using 100 octane which burns leaner than 93.
Hot is over 150º IATs and 230 ECT's
Max ECT 235º
Max IAT 165º
Max exhaust gas temperature 1375º

Now you have fresh data to ponder.

Les

 

So, what do you think? It's a race tune and it's a beast until the car gets hot and slows down. Then it's just FAF. (Fast as F) Maybe I'll hit the 1/4 this year as see what she does.

Les

 

I am curious as to what timing I have. I will do a pull in 3rd gear and see what i get, just a lot of folks on the roads, many with flashing lights but soon.

 

Timing must read on full throttle and the number must not change before shifting next gear, in perfect case,my timing is -22 in 3 an 4 gear peak

 

Here is what I got on my newest tune:
RPM-5556
Boost-20.1
Timing-20.5
Coolant temp-183
IAT-126

I checked some older datalogs with older tunes, this had most data close:
RPM-5648
Boost-19.3
Timing-19
Coolant temp-180
IAT-129

It seems my tunes do not have very much timing in them. Wolf, I was lucky to get a 3rd gear pull and no way I could get through 4th gear and come near 150mph! I will check and see what amount of timing I am getting just cruising along, 70mph in 5th gear. maybe I can get Jerry to add some timing and get the fan to come in earlier or whatever he can do to keep the car a few degrees cooler. 187* should be max. Mark

 

good timing bro, if you replace sparc plugs maby there will be -22,but 20.5 is good to.

 

The plugs have been replaced but why would new plugs give more timing? I don't see that but I don't see a lot of things Les is running 26.5*. 1.5* of timing is good for 30HP. If I had some more timing I should get some power I should easily feel. But Les you said you were tuned for 100 octane, leaded or unleaded?

 

off topic but my dashcommand reports 18 psi , i will check timing next time/

 

Sunoco 100 unleaded.

Les

 

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Here is a good chart so you can see what compression you have with boost.

 

I don't understand the chart. can somebody explain it? Thanks

 

When you add boost you raise the compression in the engine, and need higher octane for higher boost to prevent detonation.
Example a 9.0:1 stock compression and add 16 lbs of boost you raised the compression of that engine to 18.8:1

That is why the srt and the n/a has two different stock compression ratios, the srt has a lower compression so it can handle more boost.
So a 11.0:1 engine stock if a turbo was added and 10 lbs of boost then the two engines would have roughly the same compression and need the same requirements to run that the 9.0:1 engine with 16 lbs of boost would need.
The 14.7 or 1 bar or 1 atmosphere makes a difference on the effeciency of the engine. After 1 atmosphere of pressure then the engine stats using more more to make the boost than it did at .5 atmospheric pressure.
5-7 psi in a engine and it can last longer than a N/A engine due to the engine is not doing work to suck in the air but rather have it available.

 

OK. Stock engine is 10:1 and I am running 20psi. that shows 23.6 looking at the x and y axis. 23.6 what? Adjusted compression? From what I have been told my numbers on a 3rd gear pull are good. THX