XFR Dyno revisted today
 

So , I thought I would revist the Dyno today to do some more research.
This time I decided to use a DynoJet Dyno to see how much variance there is from Dyno to Dyno. With all things compared in the end this particual DynoJet made 5whp more than the SuperFlow I tested prior.

I did forget to add the tail pipe A/F sniffer but we already know the readings. Do notice that each of these 3 runs were made back to back without any cooling time and the numbers kept rising each time. Usually the number go lower after each pull.

http://img88.imageshack.us/img88/716...9142046.th.jpg

That is one very impressive powerband! Do you have any further plans to unleash more power? Thanks for sharing, and helping to blaze a trail to the Holy Grail of power for the few of us that are keenly interested.

Bruce

If I feel the need to make another 100whp I can do the snake bite kit and the killer chiller . Then change the pulley to add 1 more psi of boost and then have it remapped. That will get it to the 600whp mark undoubtably as it has been proven on a similiar engine already. From there things will start t ofatigue and takes loads of stress but I figure that would be the max I would do.Remember, my tune and mods are very conservative at this point, there is no added stress added to the motor ,yet ;)

Check out all the warning lights ..

I just noticed it kicked down to 3rd gear here.

Stop this. You're making me want to trade in my SC for an R haha.

^ Just tune yours and save the money you would on a R model^. I bet you would be satisfied with modding the one you have now, and youll save money in the end.

2010 XF S/C dyno results
 

Dyno'd my stock XF S/C and got 431.4 rwhp. Seamed high for a car that is 470 at the engine. The second pull was 423 rwhp.

Anyone else get numbers like this?

I wanted to check the hp and afr before I started working on the upgrades.

What type of dyno did you use? Can you post post it along with AFR?

Can you post the dyno slip, and also tell what correction has been used (ie DIN, SAE STD)?

Does sound a bit high. 15% driveline loss would be expected...which would leave you about 400.

You really can't use a percentage for driveline loss as a rule of thumb. I.e. a 1000rwhp car isn't losing 150hp to the trans, and only 75 hp at 500. Modern transmissions are extremely efficient. My xfr dyno'd 460 to the tires stock, my m5 447 to the wheels. I have dyno'd autos and manual trans' in the same type car with the same engine with nearly identical results, so I think a lot of that percentage loss is out the window with the newer transmissions.

:) true, just change the wheels and tires to heavier and watch your numbers drop

This is why you should use the same dyno and conditions as close as possible for stock and then modded dyno runs to see where the results lye. There are way to many factors to compare your dyno vs mine and others for these reasons. For me I could care less if my car made 410 -440- 460 rwhp stock long as I see the improvement %'s from the mods that get done.

Just stick with a dynojet, and you will get comparable numbers.

Yes, most on this forum experience issues with the dynos that have 2 small drums per wheel, better avoid them.

But without having some base info of the run, the values shown from kraatz have no meaning.

And last but not least, if you don't have this base info, you can't be sure if a next time the settings are the same.

2010 XF S/C Dyno
 

House got hit by lighting so I'm using my iPad. It will take a few days but I'll post the Dino run and find out all the other requested info. SerioudHp in Houston did the Dino.

Regards

2010 XF S/C Dyno
 

New to dyno'ing a car so let me know what info I should get....

Dyno manufacturer
Correction factor
Amb Temp?
.
.

I can always do another run if needed to so that I have a good baseline.

Thanks

2010 XF S/C Dyno
 

Find the attached dyno for the second pull. I'm still waiting on answers from SeriousHP on the correction factor and the AFR print out.

Attachment 21445

This all started because I was hearing a ticking noise during full throttle. Didn't sound like pinging but Jaguar did the following bulletin JTB00241NAS1. The car still makes the ticking noise. I wanted to check the AFR to see where I was at. The car ran ~14 at idle but dropped to 9-10 during each of the pulls. I would like to replace the exhaust, install high flow cats and do an ECU tune but I want to make sure everything is 100% before I start.

Attachment 21452

Any ideas on the noise? Almost sounds like the A/C fan.

Thanks,

Found something interesting today.....my XFR is in the shop getting some warranty work, and they gave me an 11 xf supercharged one for a loaner. So I decided to put it on my dyno and see the difference. Suprisingly, the peak hp was within 5 of the XFR, but the midrange was down about 30whp or so. I was also able to record A/f on this one and it stays about 12 to 1 all the way up until the last 500rpm then drops steady to 11.3 to 1. When I get the XFR back I am going to do some further testing and see where it's at. Does anyone know a good spot to pick up as a boost reference on these things??????