Camaro XV

[Che70velle]

Originally Posted by DOOM

So you have Marks car and your most impressed with the headlites??

This?????
Wait, what!?!? Come on Weld!

[DOOM]

Originally Posted by clill

......

Well it looks like we know where Hellfire is going when Mark is done with it!

[waynieZ]

A fitting destination if it could happen.

[WSSix]

Originally Posted by DOOM

Well it looks like we know where Hellfire is going when Mark is done with it!

Well of course. I mean Charlies does have impeccable taste after all.

[PTAddict]

Originally Posted by mikels

OEM fans are not typically rated in CFM. 850W is simply (volts x amps).

Obviously, that is not enough to design to for cooling requirements, so a volume flow rate vs. pressure drop is required - this is where many fans fall short as they are rated in CFM @ 0 (zero) pressure drop - which is not how you are using them (And some have dramatic loss in flow with pressure drop).

The SRX turbo fan flows:
~1.0 m^3/sec @ 300 Pa pressure drop (2119 CFM @ 1.2"H2O)
~1.5 m^3/sec @ 225 Pa pressure drop (3178 CFM @ 0.9"H2O)

So pressure decrease of 25% results in flow increase of 50%. Now you can see why flow curve (mass flow vs. pressure drop) is what you are really looking for in fan specifications.

If you extrapolate flow curve for SRX turbo fan, flow @ 0 pressure drop is on the order of ~2.5 M^3/sec (5300 CFM). (not 100% accurate as flow rates become non-linear at very high and low pressure drops)

You really need to know what the pressure drop is through your cores to determine flow rate of fans (that combined with heat exchanger efficiency will give you kW heat rejection).

BTW- Modern high-efficiency cores are WAY more efficient than old-school designs - so not as simple as looking at core thickness, size, etc..

Dave

Dave,

As a guy with an engineering background myself, I greatly appreciate your analysis of the decisions that go into building a car like this. There's a big difference between building cars that promise on paper to be great real world performers, and cars that can back up the promise. And that difference in large part comes down to the kind of experience and knowledge that you and Mark represent. Thanks much for sharing.

The fan data is very helpful for me - I'm looking to upgrade the track day cooling on my car and I think airflow is one of the major areas for improvement. Trying to figure out the part numbers for the SRX fan, is this it?

http://www.gmpartsnow.com/auto-parts...and-motor-scat

And do you happen to have the part number for the fan controller? I'm switching over to a GM E38 controller, and am very familiar with HP tuners and the PWM fan control settings, so I think that part is straightforward ...

Again, thanks for your contributions.

Scott

[Ns RS]

Originally Posted by DOOM

So you have Marks car and your most impressed with the headlites??

Mr. Magoo needs all the help he can get!!

[mikels]

Originally Posted by PTAddict

Dave,

As a guy with an engineering background myself, I greatly appreciate your analysis of the decisions that go into building a car like this. There's a big difference between building cars that promise on paper to be great real world performers, and cars that can back up the promise. And that difference in large part comes down to the kind of experience and knowledge that you and Mark represent. Thanks much for sharing.

The fan data is very helpful for me - I'm looking to upgrade the track day cooling on my car and I think airflow is one of the major areas for improvement. Trying to figure out the part numbers for the SRX fan, is this it?

http://www.gmpartsnow.com/auto-parts...and-motor-scat

And do you happen to have the part number for the fan controller? I'm switching over to a GM E38 controller, and am very familiar with HP tuners and the PWM fan control settings, so I think that part is straightforward ...

Again, thanks for your contributions.

Scott

SRX turbo fan part number is 25931645 as you show. PWM controller is built in to fan motor - so no separate module like Corvette fan.

Max PWM duty cycle is 90% positive polarity @ 100 Hz (need this for calibration). Size wiring & fuse appropriately - 64 AMPS peak.

First used this fan on Red Devil and dropped coolant and oil temps ~10F just by changing to this fan from 400W Corvette fan.

Dave

[PTAddict]

Originally Posted by mikels

SRX turbo fan part number is 25931645 as you show. PWM controller is built in to fan motor - so no separate module like Corvette fan.

Max PWM duty cycle is 90% positive polarity @ 100 Hz (need this for calibration). Size wiring & fuse appropriately - 64 AMPS peak.

First used this fan on Red Devil and dropped coolant and oil temps ~10F just by changing to this fan from 400W Corvette fan.

Dave

Thanks much for the prompt response! 10F is a significant improvement when you're at or beyond the edge already. I'm ordering this fan tomorrow.

Waiting to hear how Mark is doing at OUSCI, as I'm sure you are too.

Thanks,

Scott

[GregWeld]

Originally Posted by Rick D

As Charley would say "You Suck"

Also as Charley would say....... "SO?"

LOL

Originally Posted by WSSix

So Greg, is it as docile and liveable as Mark described? Glad you guys are out having fun!

We did the swap once again tonight -- as this is much easier for Mark to not have to get in any later than is already playing out with this event. The car is far safer tucked away in the trailer at the track than in a hotel parking lot in Vegas where it might not survive the night!

Second night of driving - this time from the Shelby headquarters event back to LVMS... so now I'm not nearly as nervous driving someone else's baby.. and I get to enjoy the pure pleasure this car is. Smooth - powerful sound... real world pro-touring... by that I mean I would be HAPPY to drive this car to TEXAS! Tonight! Fire it up and cruise! All the sensual pleasures are there - stereo - great seats - SOLID well mannered road car. Power you can sense and feel in the throttle - but the clutch is silk as are the transmission and the brakes! Oh man this beast has great feel in the brakes.

Here's the deal -- My Mustang feels and drives like a race car.... I would not want to drive it anywhere but on a track. This car --- this is a car that you want to drive..... To me - it's the real deal of what people are trying to get when they're building a pro-touring car. This car on Hot Rod Power Tour would just be unimaginably good!

Originally Posted by DOOM

So you have Marks car and your most impressed with the headlites??

I'm old... okay!?!?! Good headlights are important! LOL

[GregWeld]

Originally Posted by clill

What could possibly go wrong.

Why does your phone camera make me look so short and fat?