410 Gears are Da Bomb!!

[JOHN317]

Just got back from Vista Ca, where Vista Driveline installed my 410's and
Joe Delano (2005SSR6Speed) reprogrammed my comptuer. Wow! Totally different truck. This is what GM should have done from the beginning, just as Jim G said. Joe's repromgramming took out the torque management which unleashes the beast a little. He also reset my fan temps to come on at 190 deg. Now my temps never get over 200 deg., even in L.A. commute stop and go traffic. Thanks Joe for all your help. ( Joe is a true Fanatic who unselfishly enjoys helping others make the most out of their ride.) On the way down I monitored my mpg very closesly and also on the way back after the gear change. The results were surprising.
For the 582 mi going down from Redding I averaged 21 mpg. On the way back ,driving at the same speed I averaged 21.5 mpg. In 6th gear it seems like I was running about 250 rpm higher after the gear change but got better mileage. There was no wind going either way. Between the gear change and Joe's tuning you get more performace and better gas mileage. Win win/

[SSRRev]

Glad you made it back safely, Art. Sure was good to see you and spend time together. And yes, Joe is one class act.

Ken (SSRRev)

[blueroadster06]

finally found a shop here in San Antonio that can reprogram the computer......4:56 gears are going in next week...I hope I can have the same results as you John315....

[Mike in AZ]

Art / Joe,

I'm very interested in the details of exactly what settings were changed on the fans. This will influence my recommended set point for the Aux Fan in the instruction set. In order to help reduce the wear on the OEM unit, the Aux Fan needs about an 8-10 degree lower setting than the OEM temp set points. Can you shed a little light here?????

Stock settings are:
1) Low speed turns on at 226 increasing temp, off at 219 decreasing.

2) Low speed to high at 235 increasing temp, high to low at 226 decreasing.

3) With the A/C on and the vehicle below 35 MPH, the cooling fan is allowed to be turned on to low speed. Above 35, turning on the A/C does not engage the fan.

I have no information to make me think that the computer turns off the fan above 35 mph if it is responding to engine temperature inputs.


Thanks,

Mike

[Boosted]

So if you take your truck in for warranty work at the dealer and the update the pcm you are going to have to go back and get it reprogrammed again?

[2005SSR6Speed]

Mike and Others - These are the fan temps that I am using for the retune, they are the same fan temps that are used for the Magnuson Tune so the fan kits can be set 2 ways. These fan temps have been approved by CARB for emission compliance.

New Fan Temps

196 degrees - 25%
199 degrees - 50%
203 degrees - 100%

Stock Settings

217 degrees - 30%
221 degrees - 40%
225 degrees - 40%
228 degrees - 60%
232 degrees - 80%
236 degrees - 90%
240 degrees - 100%

AC Fan Temps are preasure controlled

178 PSI - 30%
196 PSI - 32%
214 PSI - 32%
232 PSI - 86%
250 PSI - 86%
269 PSI - 100%

When I do a tune I do an Initial Read and save that under your name, then we modify the tune as I explain everything to you and save the new tune under your name and lastly I flash the new tune into your SSR and you are off on your way. At any time that you may need a reflash or return to your stock tune I have it on file.

[2005SSR6Speed]

Boosted - The dealership is not allowed to reflash your SSR or any other vehicle without your permission unless you have a lease vehicle. There are also no updated flashs from GM since the start of production on the SSR, I had my Friend the sevice manager at the dealership check.

[2005SSR6Speed]

John317 - It was my pleasure to meet you and I enjoyed our conversations. Thanks so much for the compliments, give me a call if you need anything else. Still thinking about the supercharger after that little ride around the block?

[Boosted]

hmm.. They flashed my Diesel 2 diffrent times without warning... According to my dealer down here they can anythime they have an update. I guess GM lets there dealerships decide on what to do.

[2005SSR6Speed]

Unless it is a lease they are not allowed to reflash without your permission. The SSR has not had a reflash since its introduction. You could just talk to the service rep and make sure they dont ever reflash your SSR just to make sure.

[JOHN317]

Originally Posted by 2005SSR6Speed

Unless it is a lease they are not allowed to reflash without your permission. The SSR has not had a reflash since its introduction. You could just talk to the service rep and make sure they dont ever reflash your SSR just to make sure.

I think I'm going to have a sign made to hang by the PCM input terminal.
"Consult owner prior to Reflash"

[JOHN317]

Originally Posted by SSRRev

Glad you made it back safely, Art. Sure was good to see you and spend time together. And yes, Joe is one class act.

Ken (SSRRev)

Ken,

It was great to get to meet with you in person and get to know you a little better. And thanks for the invite to your Tuesday Bible Study, I enjoyed it.

[JOHN317]

Originally Posted by 2005SSR6Speed

John317 - It was my pleasure to meet you and I enjoyed our conversations. Thanks so much for the compliments, give me a call if you need anything else. Still thinking about the supercharger after that little ride around the block?

That ride in your SSR was a real eye opener. In fact my eyelids were being pasted back by the G force. All I can say is WOW!

[Mike in AZ]

Originally Posted by 2005SSR6Speed

Mike and Others - These are the fan temps that I am using for the retune, they are the same fan temps that are used for the Magnuson Tune so the fan kits can be set 2 ways. These fan temps have been approved by CARB for emission compliance.

New Fan Temps

196 degrees - 25%
199 degrees - 50%
203 degrees - 100%

Stock Settings

217 degrees - 30%
221 degrees - 40%
225 degrees - 40%
228 degrees - 60%
232 degrees - 80%
236 degrees - 90%
240 degrees - 100%

AC Fan Temps are preasure controlled

178 PSI - 30%
196 PSI - 32%
214 PSI - 32%
232 PSI - 86%
250 PSI - 86%
269 PSI - 100%

Joe,

I'm really puzzled by the software mapping. It appears that there must be a threshhold for stock cooling system operation in the software that turns on a gate to low speed for the fan and high speed for the fan. It would make sense to use a percentage map like this, since you have to integrate some hysterisis into the operation..... for instance, the stock setting for low speed fan would turn on when the temp rises to 52.5% (226F) and off when it drops to 35% (219F). For high speed, it would turn on when the temp rises to 87.5% (235F) and to low speed when it drops to 52.5% (226F). This all makes sense if you use a 2 dimensional look-up table in the software for fan operation.

Here is the "Theory of Operation" page from the Service Manual......

I think we need to get together with Magnuson....... I'll be in Costa Mesa all next week. Maybe we can all get together. I think their reprogrammed range of operation is so short that you never get to low speed operation..... It just goes straight to high. I'd like to discuss a change to their software to extend the life of the OEM cooling fan a little.

Regards,

Mike

[2005SSR6Speed]

Mike - They will not be able to change anything in the tunes once they received the CARB Certification or they would need to spend the money for a recertification.

[Mike in AZ]

Joe,

I need to understand the outcome of their "tune" on the cooling fan operation a little more. I expect to have Hank (Wilddesertwolf) in my garage on Saturday to finish off the S/C intercooler relocation and Aux Fan kit install. I'll have to do a little testing to see where we are for the fan actually turns on with the modified fan turn-on parameters.

At any rate, my standard Aux Fan setting of 210 will not be good for the S/C installation. We're going to have to get the new set point empirically.

Are we able to modify the set points after the Magnuson tune?????

Mike

[2005SSR6Speed]

If you modify the tune that is shipped with the Supercharger then the warranty is void. I dont think any of us are willing to void our warranties. It would be much easier to modify your fan kit then to have Magnuson reevaluate the tune they have right now. It costs alot to get the CARB certification and they wont throw that away for an aftermarket fan kit. Sorry!

[Mike in AZ]

Originally Posted by 2005SSR6Speed

If you modify the tune that is shipped with the Supercharger then the warranty is void. I dont think any of us are willing to void our warranties. It would be much easier to modify your fan kit then to have Magnuson reevaluate the tune they have right now. It costs alot to get the CARB certification and they wont throw that away for an aftermarket fan kit. Sorry!

Joe,

The primary objective of the fan kit is to turn on after the thermostat is full open and before the OEM fan gets powered up. With a 195 degree thermostat (begins opening at 190 and full open at 200) and a main fan turning on at 200 degrees, there is a very narrow band of operation to have the Aux Fan do much work. I will work with the Hank's S/C truck on Saturday in an effort to understand how the Magnuson settings of the fan switch points affect the actual fan operation. It appears that they took a two step fan turn-on table and compressed the slope to the point that it is now just an off-on switch to high speed only.

I have been mapping all of the fan functions in an excel spreadsheet and will add this map to the work. When it is done, I'll publish....

If there is a way to get the Aux Fan to turn on before the OEM fan, I'll find it.

I actually enjoy the technical challenge to make this work out.

Thanks for your help.... we'll dialogue more - I'm sure,

Mike

[2005SSR6Speed]

Mike - If there is a way to make it work, I am sure you will find it. You do a great service to all of us Fanatics!

[Mike in AZ]

Thanks Joe.

You have set some pretty high standards for support.

Mikey

[Focks]

I really appreciate all you are doing with that Fan nstallation Mike. and I am looking forward to you installing mine in Ruidoso. Whoops.. I forgot that is suppose to be a secret so you are not just doing installations the whole weekend.. shhhh mums the word.