Currently flashing to stock. So we can compare..stay tuned.

 

Great!

 

For sure my man. I'll post the results once we're done with the dyno test.

 

Still running..

 

I assume since you were on the hoist they had to pull the front driveshaft? Not a linked dyno. Interested to see how that effects things.

 

****, that hopefully was an alignment and not pulling the front driveshaft. We shall see, I'm kinda with you on this one...

 

Hey guys,

Just a quick post, after doing 7 pulls we're having unhealthy reading on STOCK tune. GSR's team figured that we need to change the spark plugs because it happened to one of the F Type R as well and they fixed it by changing it.

By the way my car is brand new..so probably we have bad spark plugs from the factory?

Reading was based on power dipping at 6000 rpm and suddenly pulling back up. I'll post again once we fix this problem. I'm already getting a quote to get the spark plugs replace. Hopefully they can do it this week.

Thank you all!

 

oh no brother...Just make sure its spark plugs and nothing more. Can't wait to see these numbers. I'm ready to eat some humble pie from my earlier comments

 

Ahh you're at Lang Racing in Irvine/Lake Forest. My office is a couple of miles away. Woul have loved to see this in action. Lang runs a well put together shop

 

Yes, we did it at Lang. They're the ones who's going to replace the spark plug or Boden Autohaus.

I'll let you know when's the next dyno

 

Can't wait to see the final output too! Of course, once we fixed this problem.

 

Bad plugs should be under warranty. They're designed these days to last 100k on modern cars.

 

Not unless you can find me a way on how to ask them without them doubting why I specifically asked for a spark plug replacement?

 

I think you're missing something. You don't lose any lower RPM torque or HP to achieve any of our gains. I'm not even sure what a tuner would be able to do in order to 'lose' low end HP/Torque. It's not exactly a packet of cigarettes, not going to fall down the back of the couch!

The only way you would lose low end torque or HP on these cars is if you went in and de-tuned the car in that RPM range.

 

It's not your plugs. If you did 7 pulls on the dyno then you are most likely hitting catalyst over-temp protection mode and the car is either dumping fuel, or pulling timing to get the EGT's down.

These cars are extremely sensitive to cat temps, even 2 pulls in consecutive order without adequate time in between will tip them into protection mode. You need a lot of airflow (I don't see a big fan there, but I'm sure you have something set up there?) and if you can get a couple of fans pointed at the cats as well that will help.

Interestingly, having seen a few 'VMax' tunes from people who switched over to our stuff, one of the most concerning things was the fact that some of the protection mode maps had been edited to lean out the AFR. My guess is that the tuner was running the car on the dyno and seeing rich mixtures and editing the tables thinking they were the optimum fuel strategy, when in fact the car was just too hot and they were editing the safe mode tables.

We are well into the 100's of tunes for these and the V6 engines, multiple dyno sessions and I've yet to see a set of plugs go bad as a result. I would monitor your cat temps and allow more time between runs, before you go changing them.

 

Also, to the OP - see you joined recently. Welcome to the forum, it's a really good crew here, and your car looks fantastic. Congrats!

 

"if you can get a couple of fans pointed at the cats as well that will help."

Stuart,

Isn't the cat temperature calculated rather than measured? I am less familiar with Ford/Jag, but that is typical from what I have seen.

 

Just curious....a brand new car with no run in period...multiple engine stressing dyno runs. I"m no expert, but this does not sound like a healthy thing for the engine.
CRS

 

I think the whole thing is a little weird but OP seems very determines so hats off to him.

 

I daily drive the car so I already have 1700 miles..don't know what are you pertaining about the "run in period"?