New Best More Water and Less Alky (93 Octane)

[esinger]

I went to the track yesterday and made 5 runs. Three of them were under my previous best. I put more water than alky into the reservoir, so I should be pretty close to a 50/50 mix of alky and water. I’m not going to state that’s 100% of why I ran better majority of the runs, but it’s part of the mix of the track hooking better, slightly cooler ambient temps and the alky/H2O mix.

My new 1/8th mile best is an ET of 7.768 and 87 MPH. I ran a 7.85, 7.86, 7.92 and 8.03 on the other 4 runs. The last two I spun bad and suffered on the 60’.

My intake manifold temps peeked at 160 degrees, which is the lowest I’ve ever seen on a WOT run. Cruising down the highway at 70 MPH I normally is 90 degree temps (just throwing that in there for reference).

I still need to work on the 3 gear tuning, because it’s breaking up a bit on the last half of the track, no knock just feeling rich.

 

[dees75z]

Congrats man!!

 

[Quick6'n'-K.C.]

I am wondering since your car is running rich, adding water to the alky mixture made it lean out some. You said its still running rich?

What boost are you running? Did you try turning it up some to compensate for running rich?

Good runs if you ask me!

BW

 

[esinger]

Thanks Guys,
Boost was at around 23 lbs and I thought about turning up the boost a bit, but only after leaving the track. Kind of funny how all these thoughts of what I could have done come to me after the fact I also thought about increasing the timing for 3rd/4th gear WOT.

Oh well, there will be other days.

 

[Boost231]

eric, good info here. what turbo are you running? im very impressed with your intake temps. where is your sensor and where is your alky nozzle located and what are your setting internally and on the controler? Also you are using a power logger correct? your turbo seems pretty efficient for atleast 1/8mile stuff. im trying to get my intake temps down but i dont want to spray alot of alky either.

 

[Boost231]

o also are you running an lc-1? how about you send me your PL file on the 7.768 pass so i can have a look

 

[esinger]

Here are my logs from Sunday. The first run was my best of 7.76, however it was also my worst as far as knock. I kind of freaked out about the knock and lowered it on the next 4 runs. Know that I think about it, I didn't prime the alky before the first run, so that's probably the reason. After the second run, I left the timing same and was play around with the fueling.

I'm running a TA49, yes I have an LC-1 install. The MAT senor is intalled in the front of the intake manifold. Alky nozzles are a M3 install before throttle body and a M15 installed on the turbo adapter (between turbo and intake).

Thanks

 

[Jerryl]

Eric,
Nice runs!
What was trhe mph on your best run?

 

[esinger]

Hi Jerryl, it was a little over 87 MPH.

Brent, I forgot to answer you other question. I have still not openned the alky controller, so the settings are what they were when Julio shipped it to me. That's another thing I've thought of playing with to see what happens.

 

[Jerryl]

Are you really launching at 22PSI? D***
Refresh my aging memory ...... What cam & converter are you running?

 

[esinger]

I launch with 22 PSI in my dreams, but reality is more like 5 PSI.

I'm running with a stock cam and the Pat's Performance Converters 1003XHD (10” 2004R W/Anti-balloon Plates) stalled around 2800 to 3000.

 

[Jerryl]

I launch with 22 PSI in my dreams, but reality is more like 5 PSI.

I'm running with a stock cam and the Pat's Performance Converters 1003XHD (10” 2004R W/Anti-balloon Plates) stalled around 2800 to 3000.

Something does not look right on the log.
"Looks like" you are launching around 22 PSI and MPH is around 81.
Also, it looks like the stall is right at 2800 - per PAT's specs.

I also noticed that your MPH at 87 is pretty consistent with these and previous runs, and, the launching technique and suspension set-up looks to be right.

Now, my calulator puts the combo right around 7.6X @ 88.X
The calculator is not real life, but I found it to be very close in "predicting the results of the modifications" and really helped me understand and realize a few things. (Sure prevented me from throwing $$$ at it )

My advice;
Don't underestimate the benefit of RPM's .
I belief this to be the "best kept secret"......... Well not really, but we focus so much on boost, we kinda loose track of flow.

Good job man!

 

[esinger]

I'm going to have to look at that log when I get home. 22 PSI and 81 MPH at launch is pretty darn unbelievable

I have a pretty crumby boost guage for use with launches, it's a digital gauge that doesn't start reading until it hits 5 PSI. I normally sit at the line and watch my RPMs (Digital Tach as well) and when I hit about 3000 RPM I'm ready to launch. Anything much over 3000 RPM the tires either break loose or the brakes don't hold and the car inches forward.

I have a digital dash, so I thought having green digital gauges for Boost, Tach, Oil Pressure and Water Temp was a nice interior touch. The only thing that messes up the appearance is the red digits/display on the scanmaster (If anyone knows how to easily change that, please let me know).

I believe your correct in my combo being ultimately capable of 7.6X ETs. I imagine with some tuning, good launch and a track that hooks I'd be able to get a low 7.7 or high 7.6

 

[esinger]

BTW Brent, my tuning is solely based on 1/8th mile. I've never taken it to a 1/4 mile track since the closest one is about a 2 hour drive and many people have told me they don't prep the track very well. The 1/8 mile track is about a 10 minute drive from my house, so it's convenient. There are talks of making that track a 1/4 mile and some people are for it, but others say 1/4 is really hard on a drivetrain and they'd still only run for the 1/8th ET.

 

[Jerryl]

PS:
My calculator says:
1/4 Mile ET = ( 1/8th Mile ET + .22 ) / .655

7.70 = 12.09 in the 1/4
7.6 = 11.94 in the 1/4

You are "only" 30 hp away from the 11's.

 

[mach.80]

What Horsepower does that calculator say he has at present state. I think that is my goal for my street car.

Thanks

 

[Boost231]

ok. so your spraying a small nozzle pre turbo eh. how is that working out on the turbo? also if i where you i would manually shift your car at about 5,200 to 5,300 since its short shifting some. also i would really like you to try and verify your intake temps. i have yet to see any hotair that i have worked on drop temps when boost comes up. its always start at a set temp and rises. good luck to you and watch the knock

o also whats with the MAF values?

 

[esinger]

Hi Brent,

I thought a lot of the pre-turbo nozzle, but I kind of figured that since I'm not spraying all the time it really shouldn't hurt it much. The pre-turbo nozzle has just been on the car a little over a month, so I'd be very surprised to see any noticeable difference with the compressor wheel.

I'm not really sure what I could do to verify the intake manifold temps. It's almost irrelevant to me if it's truly accurate. All I know is between the first time I started logging intake air temps and now, there's been a 40 degree drop. Some of that is the pre-turbo nozzle, but the rest has to be the water/alky mix. From this point on I really don't see any need to run straight methanol ever again. Boy that 3.5 gallons of methanol is going to last me even longer.

Believe me I'm watching knock. Every time the casper audible knock sensor goes off, I immediately look at the scanmaster. I know those Fast XFI boxes are sweet and I’d love to have one, but I'd feel like I'd lost an arm if I didn't have my scanmaster.

Jerryl may be able to give you information on the MAF readings. I'm running the TT SD Chip that gets rid of the MAF sensor, so I really don't know what those numbers are. I suspect they are some kind of simulated airflow numbers.

 

[esinger]

also if i where you i would manually shift your car at about 5,200 to 5,300 since its short shifting some.

You can call me chicken stuff on this one:redface: I'm kind of nerivous about manually shifting while going down the track

 

[esinger]

You are "only" 30 hp away from the 11's.

"Only" 30 more HP? Maybe I'm further away than I thought. Me thinks my horsies are getting harder to come across these days