93 octane @ 28psi tapering to 22 at redline road tuned by AL then baselined on dynojet.




Car was street tuned to 10.9:1 a/f and as you can see, it looked significantly richer on the dyno.

Mods are:
hks filter
cusco turbo pipe
AMS lower icp
10.5 hotside
02 housing
3" B&B catless turboback
HKS 280 cams
SMC 100% alky with 7gph nozzle
Hallman mbc

stock intercooler & upper intercooler piping

 

Very nice numbers, I love the smooth curves of the stock turbo.

 

Are you running cam gears? If so, what did you have them set at for the runs? Also, how smooth are the 280's?

Thanks,

Ron

 

No gears, just straight up like David Buschur recommends.


It is a lopey idle as is to be expected. I love it though. It sounds like it means business. I had to play with the idle screw and bring it up to 1k rpm. Not for everybody, but I'm pleased.

280's are definitely not necessary on the stock turbo. Al hated them for their idle characteristics, but to each his own. Honestly I have nothing to compare them to, but I'll live with them just fine.

 

Man, your AFR was amazingly low (rich). 2 questions:

1) Why did you (or Al) tune the car so rich to begin with (10.9 AFR)?? Was this to be careful in regards to the alky injection or what?

2) Once you saw on the first run how incredibly rich you were, why did you not adjust from there? Is it because Al was no longer around to reflash and/or because you don't have an S-AFC for fine-tuned adjustments?

Just curious, because despite those nice numbers, I think you can get a lot more...

 

Remember the ideal burn ratio for gas is 14/1 - but alcohol is 6/1 - the perfect a/f for a particular application is dependant upon many variables such as the alcohol jet size, boost level and driving style. In this case the cr was running a steady 10.9 on the road as measured with my Motec PLM. The lower reading on the dyno may be attributed to miscalibration or misreading of the dyno's sensor - OR - maybe the collant temps were hotter than on he road due to reuced air flow which would result in lots of collant temp fuel enrichment

Either way his car is making good power - smoothly and safely and on low cost pump gas - it runs well

Finally - note that the factory tunes even richer on stock cas than this car is running on high boost !

 

The car was definitely not running hot on the dyno. The intercooler pipes were cool to the touch. I heard cars read richer on the dyno than the street, but was surprised by the very different results.

Regardless, The car pulls like a freight train and I'm very happy with the tune.

 

I hear ya. I know _EXACTLY_ how rich the car runs from the factory after 5200rpm. My AFR literally fell off the chart like Wil E. Coyote chasing the Roadrunner.

 

280!10.5!alky!customtune!=350whp i thought maybe you be at least another 20/30whp higher

 

hmm i expected a lil more horsepower as well didnt some other person with the same setup mad 415 horsepower?? ??but he had 272's not 280's i believe he was from atlanta georgia

 

Interesting indeed. I think this is a very conservative tune. The timing wasn't even played with. If you look at the record tune, he was running 12:1 a/f on the dyno, which means it is probably even leaner on the street. That is just a sick amount of power though. Maybe I should get an afc and lean it out a bit and see what happens?

 

389whp/420wtq. I also had an upgraded FMIC and upper i/c pipes. My parts were from Buschur and I was using methanol, amongst many other differet factors... and my tune was more aggressive. This guy's a/f ratio dips into the low 10's... mine dips into the mid to high 11's. I think he's making great power for what he has, especially for his a/f ratio being so rich.

Just a question, what do you have your alky kit to begin spraying at and to max spray at?

 

I've noted instances whereby different Dynojets gave different readings for the same car, so take that FWIW. That being evident, unless two cars are run on the same dyno, it's not an accurate comparison.

Additionally, the observation that the A/F on the road differed from that registered on the dyno seems significant it itself.

Furthermore, for those running alcohol injection kits, do you even know your nozzle size?

 

I had it set to come on at 12 and peak at 22, that is how it came. I have since changed it to come on at 16psi and still peak at 22psi. I haven't noticed any difference since the turbo spools so fast anyway. I just save a little more alcohol around town.

I'm buying some methanol and we'll see if it makes any more power on the same tune. Do you think if I leaned my tune out a bit with a afc, I would pick up very much power? I'm sure the stock intercooler is close to being maxed out, probably the choke point now.

 

I think all the newer buschur/smc kits come with a 7gph nozzle. what are your thoughts about the different a/f readings? This is really intresting to me.