There will be no damage, but you will trigger a Check Engine light as you will be producing boost well beyond what the programming even knows what to do with. Perhaps if you keep it under 3000 rpm on the way to the dealer, you won't trigger the light. Before that programming issue was resolved, my CEL was being triggered around 5000 rpm.

 

I asked Stuart@VAP the same question and he said unless you were ragging on it which might generate a CEL then you shouldn't do any damage.

Which brings my own dumb question of the day - are the superchargers the same in the V6 and the V8 ? Does upgrading the crank pulley on a V6 put the system under more "strain" than the V8, assuming I'm not taking it to the track and just usual spirited daily driving ;-)

 

I have a question as well.... I have a file tuned with the lower crank pulley but the pulley has not yet been installed. Can I download the tune now or would it be wiser to wait until it is installed?

 

This has been discussed here, but probably in a different thread. The V6 and V8 use different superchargers.

The tuner at VAP (not Stuart) told me that the current tune they provide will work with the stock pulley but works with the oversize lower pulley as well. I was asking about needing a second set of maps should I get the lower pulley later, and wanted to get them all at the same time. Here's what he told me in emal:

"You will see the 91 and 96aki files on the file screen when plugged to the vehicle, both files are good for a upper and/or lower pulley(if every added in future)."

 

Same here. I did in fact run the tune for a week or so before the installing the lower pulley.

 

As I will do in when I buy the tune. At this time to preserve warranty - I'm leaning on not tuning yet. The performance is already quiet impressive, so I'm happy. Once I've gotten a couple more track events under my belt and sorted out some trips with a warranty, I'll likely then buy the tune for the pulley, but not necessarily put the pulley in at that time. Stuart said this is fine, they just want to know in advance.

 

So how many folks have a tune and a lower pulley running ? Any regerts (sic) ?

Given the different superchargers (and I don't know their full specs), is an upgrade on a V6 any more or less "hazardous" than the V8 in terms of longer term health for a daily driver that isn't being pushed at the track ?

Got the boxed pulley in front of me, already have the VAP tune, just need to be pushed out the plane for my first parachute jump ;-)

 

The V6 uses the Eaton TVS R1320 S/C, the V8 uses the Eaton TVS R1900 S/C.
1320 and 1900 are the cfm or cubic feet per minute ratings.
The R1900 is physically a fair bit bigger than the R1320.

 

There are far too many unknowns to be able to confidently opine on that matter. The two engines are so similar, one could only hope that the V6 crank and rods are as strong as those of the V8. At 450hp the V6 is putting no more load on those rods than the V8 is at 600hp. The real concern is that the piston heads on that V6 are seeing the same pressure as the V8 would pushing 750hp.


Certainly no regerts, but potentially shortened engine life has to be considered. But look at the bright side. That offers the opportunity to build the engine even stronger (power and reliability).

 

Agree. No regrets so far, only time will tell.

 

@Unhindg "to build the engine even stronger"

If I were building a custom car I would probably start with Datsun 240Z.

 

Hi Guys,

Had a 2015 FType R do the crank pulley and tune down at LG Motorsports in Dallas. Unfortunately Lou & the guys didn't get a 'before' number - I think they are only just moving into their new building and the dyno wasn't all the way in. But I know Lou really well and he said they just threw it on there and this is what it made.

520WHP. We are seeing usually around 23% drivetrain loss on these cars - another 2WD 'R' made 424BHP stock, on a Superflow loading dyno. I think this Inertia dyno will read higher & show less drivetrain loss, but your rough range on the crank figures is 650BHP at 20% loss. So I think our quoted output of 640BHP with crank pulley + tune is pretty on the mark.

 

Hi Stuart, so HP on the R AWD is roughly between 620-640HP with the crank pulley + Tune.... Whats the torque values ?.... couldnt not find that on your website...

 

I think from the results we are seeing it's more like 640-650BHP on the whole. 615-620BHP for the supercharger pulley and tune.

Torque unfortunately on the most recently posted runs they only just installed the dyno in the new building and didn't have everything hooked up, but based on what we are seeing for the ECU Tune alone, and the 47WTQ (about 61 ft/lbs at crank) I would say maybe 75 ft/lbs with the crank pulley is a reasonable expectation.

Other thing with the crank pulley is it makes more peak torque but also shifts the torque band to the left so you get a lot more low end & mid-range.

 

I was just checking out zmoothg's new vid here: https://www.jaguarforums.com/forum/f...6/#post1722030
and I noticed that on the in car while stopped shot he went well over the normal 4,000 rpm limit (for a stationary F-Type in either P or N).
So I thought "I wonder if my Stage 1 VAP tune also allows this?", so I went out to the shed to give it a try.
Yes it does, the car will now rev to the red line when stationary!
One little tweak of the VAP tune I either never realised or forgot all about.

 

Ah not quite. That number is the cc's per revolution.

1900cc per revolution, 1320cc per revolution.

The old blowers were in cubic inches per rev, e.g. M112 = 112cu/in per rev which is pretty much the same capacity as the R1900...

 

I've had the pulley and ECU change for about 6 weeks now. No regrets whatsoever. It makes a serious difference to the performance and just as importantly every day driving. The only problem is once you unleash a bit more power, you keep wanting more still!!


I think the pulley/ECU change makes for a much better partner to the 8-speed gearbox, which I think simply has too many ratios. The extra performance following the upgrade seems to have smoothed things out as well as giving a pretty significant power boost. My MPG has remained the same since as well...so no real penalty.

 

Not sure how they never noticed....

 

 

You guys getting tunes to 600+ HP is insane (in a good way) but I am second guessing my interest and intentions. I have the 2014 V8 S RWD model and every time I really stand on it, the rear end dances violently to the point that the car wants to leave its lane so you really have to pay attention. And that is in a straight line (forget about hard acceleration during a turn). Under less than full out enthusiasm, it is quite entertaining and usually scares my passengers followed by giggles and cool comments. Under really hard acceleration, it scares the driver...lol. Can only imagine what that will be like with another ~100 HP.