DA and/or Temp impact 1/4 Ecoboost

[StealBlueSHO]

For those that have raced in 90 degree weather and raced again in much colder weather... say 50’s or 60’s... how much of a time difference did you see with the denser colder air?

TIA..


Sent from my iPhone using Tapatalk

 

[bpd1151]

.1

Sent from my SM-N920V using Tapatalk

 

[StealBlueSHO]

.1

Sent from my SM-N920V using Tapatalk

I was hoping you would comment Being as you are one of the more experienced drag guys on the forum. Thank you.


Sent from my iPhone using Tapatalk

 

[bpd1151]

There are SO MANY other variables that still should be considered "in play" that will affect outcome and/or final results.

I don't need to list them. Most of you are aware of those influencing factors.

I will say in my experiences alone, that the cooler the weather, the track being less warm, has a dramatic effect on traction.

That can be addressed somewhat with additional VHT, but (lack of) traction becomes problematic.

Not to mention cooler weather combined with AWD makes it even more challenging to warm up them shoes.

The EB platform is an oddity. Although if anything, they've proven to be consistemt performers turning in solid #'s even after repeated runs.

My guess is you were/are hoping for better #'s, I just don't have the answers. I sometimes am left scratching my head too.

Just remember, this platform is still effectively handing it to so many others out there.

In the end, it's all in good fun.

Sent from my SM-N920V using Tapatalk

 

[StealBlueSHO]

I understand and agree with everything you said. I was more generalizing as in say you BPD May run 11.7-11.8 in warm weather and say 11.5 11.6 in colder fall months. Guessing at those times but you get the idea.


Sent from my iPhone using Tapatalk

 

[SHOdded]

Preventing heatsoak still be one of the best controllable mods you can make, IMHO.  Removal of the appearance cover and firewall "weatherstripping" being the easiest and no-cost options.  Then there is the pop the hood open at the end of a run till you are almost ready to run again, and wiring in the fans to run on command.  Hood vents.  Further up the scale is rigging a cooling line from the A/C system to the intake or post-turbo piping.

 

[StealBlueSHO]

Running the fans on a switch would be money... is there a write up on that?


Sent from my iPhone using Tapatalk

 

[StealBlueSHO]

And to BPDs point... I get some of my best times hot lapping... after a run everything is cooler for a short while with the exception of the trans temps... I will hot lap as long my trans temps are 200 or lower... once it bumps 205 I let her rest.


Sent from my iPhone using Tapatalk

 

[SHOdded]

Running the fans on a switch would be money... is there a write up on that?

Photobucket hostaging in progress
https://www.ecoboostperformanceforum.com/index.php/topic,1529.0.html

 

[Brucelinc]

My MKS was tune only so it was not putting out enough power to have traction issues.  I found that each 1000 feet of DA cost me about a tenth.  On the hottest most humid day I ever ran, I could only manage 13.0.  On the coolest and driest day, I ran 12.68.  This was at the same track with the same tune but vastly different air.

 

[Agentlongwood]

My MKS was tune only... On the hottest most humid day I ever ran, I could only manage 13.0.  On the coolest and driest day, I ran 12.68.

As a guy with an MKS just now looking into getting a tune, this makes me super happy.  Running bottom 13s to high 12s in a comfy daily driver is what I'm shooting for.  I'm from Key West originally so I hate cold weather... It's good to know there is at least some benefit to it, lol.

 

[Brucelinc]

My MKS was tune only... On the hottest most humid day I ever ran, I could only manage 13.0.  On the coolest and driest day, I ran 12.68.

As a guy with an MKS just now looking into getting a tune, this makes me super happy.  Running bottom 13s to high 12s in a comfy daily driver is what I'm shooting for.  I'm from Key West originally so I hate cold weather... It's good to know there is at least some benefit to it, lol.

High 12s are very achievable with a tune-only MKS.  The only occasions when I was out of the 12s was the first time I ever ran it and was just feeling it out and the time it was in the upper 90s and super high humidity. 

 

[StealBlueSHO]

Wow.. that’s a lot of ET taken off for better air...

So with the temps pushing close to 90 at the track and I am still putting down 12.3 then this tune probably has very low 12’s in it... 12.0x if I can get traction...most likely 12.1’s at least....

Should find out towards the end of October ;-)

Thanks for the input!!!


Sent from my iPhone using Tapatalk

 

[Brucelinc]

I do not know for sure but I suspect meth is somewhat helpful in combatting heat?

 

[StealBlueSHO]

I do not know for sure but I suspect meth is somewhat helpful in combatting heat?

Yes and no. It does help lower IATs significantly but if the outside air is still thin due to high ambients I am certain that still impacts..

Example being if my IATs start at 145F from the line then I am usually at around 106ish by the time I cross over the finish line...

The meth would certainly offset the higher DA but not sure by how much...I am gonna find out!

I am happy with anything 12.5 and faster. That will clean up 95% of the street cars.


Sent from my iPhone using Tapatalk

 

[bamsho]

Yes weather does affect these things bigtime, running meth limits the effect.  There were Friday nights last year, I couldn't break into the 12's on the V10 91 tune, then other Friday nights it would.  I've had nights were it was sooo humid that the car slowed down each round.  Also track prep affects too.  Also don't forget track location too.  Close to sea level has an effect too.  I hope to prove that here in Oct when bunch of us plan on going to Cecil County.  Talking with the racers at BSD that have gone to Cecil County, they run .2 to .3 tenths quicker. 

 

[irondoor19]

Wow.. that’s a lot of ET taken off for better air...

So with the temps pushing close to 90 at the track and I am still putting down 12.3 then this tune probably has very low 12’s in it... 12.0x if I can get traction...most likely 12.1’s at least....

Should find out towards the end of October ;-)

Thanks for the input!!!

Sent from my iPhone using Tapatalk

http://www.siliconeintakes.com/electric-radiator-cooling-fans/intercooler-fans-p-1024.html

Not trying to Hyjack BUT:  I am working on this: 3 - 7" Fans (12VDC, 1100 CFM X 3 = 3300 CFM )
for the pit lane ... "Will be powered by a Jump Pack" Aux Fan Setup to be installed in front of the
Radiator Stack, We will be trying to install this before the week is out WITHOUT removing the
front bumper Cover...YEA RIGHT,  so full "right up" after the install, and 1/8 Mile on friday Night...!

total Parts Cost Approx. Under 150.00

 

[lamrith]

Wow.. that’s a lot of ET taken off for better air...

So with the temps pushing close to 90 at the track and I am still putting down 12.3 then this tune probably has very low 12’s in it... 12.0x if I can get traction...most likely 12.1’s at least....

Should find out towards the end of October ;-)

Thanks for the input!!!

Sent from my iPhone using Tapatalk

http://www.siliconeintakes.com/electric-radiator-cooling-fans/intercooler-fans-p-1024.html

Not trying to Hyjack BUT:  I am working on this: 3 - 7" Fans (12VDC, 1100 CFM X 3 = 3300 CFM )
for the pit lane ... "Will be powered by a Jump Pack" Aux Fan Setup to be installed in front of the
Radiator Stack, We will be trying to install this before the week is out WITHOUT removing the
front bumper Cover...YEA RIGHT,  so full "right up" after the install, and 1/8 Mile on friday Night...!

total Parts Cost Approx. Under 150.00

Those little 7 and 8" fans can really move some air and fit into small places.  I used a pair on my 1978 5.0LMGB.  Yes I put a SBF into a MGB under stock hood.  I kept the stock 4cyl radiator too and it handled it just fine, man I miss those heavy brass core radiators!!  The Key as told to me by my radiator guy (old school brass solder fixem type guy) was airflow.  I had a pair of them with a thermal switch.  195* stock thermostat and I think the switch was set 200-205*.  You could watch the needle drop when they kicked in sitting in traffic.

Keep us updated!

 

[bamsho]

Also this is related to our heat soak issue.  Is our alum intake, not the plastic like on the F150s.  I know that is lot of our heat soak issue.  I've thought about the old school trick like they used on the 90's Fox body 5.0s.  Putting ice on the upper intake trac.  I know I have seen 140-150 IAT2 temps in the staging lanes, and I think some is just the radiate heat coming from the intake.

 

[TopherSho]

Also this is related to our heat soak issue.  Is our alum intake, not the plastic like on the F150s.  I know that is lot of our heat soak issue.  I've thought about the old school trick like they used on the 90's Fox body 5.0s.  Putting ice on the upper intake trac.  I know I have seen 140-150 IAT2 temps in the staging lanes, and I think some is just the radiate heat coming from the intake.

I ran that experiment pre-meth this summer.  It took 40 minutes to drop the temp 20f.  and by the time i lined back up i was back at 160f on IAT2.

edit: another thing i found on our platform, even with the hood up, no cover no splash guard .. shutting down the car in the lanes made temps worse.  i even ran with my hood popped in error and it did not help...  that aluminum intake is spark-death-row ...