We all love the F-Type R, that's why we're looking at this forum. And, what's not to love, 550hp, beautiful looks, etc? Ok, maybe the weight is something not to love. Actually the weight really is a concern, at nearly *4,000lbs it's quite heavy for a 2-seat sports car. (*Based on one forum member's post when he got his V8S weighed at the drag strip)

Jaguar posts the weight of the F-type here: Jaguar F-TYPE | Dimensions & Weight | Pricing & Specs

Official weight
F-Type Coupe V6S - 3,514 LBS
F-Type Coupe R - 3,638 LBS

So, right off the bat, you shave 120 LBS over the weight of the R.

As an engineer and a car guy, I tend to like turbocharging better than supercharging. Less parasitic loss, and you're essentially using free energy that is otherwise wasted out the exhaust pipe...

So, I am curious about how conservative of a tune does the V6S have? I know with my BMW N54 it comes with a pretty conservative tune from the factory, but install a JB4 and you can get nearly 100 more hp with just a tune on pump gas...

So, have the tuners done anything with the V6 turbo yet? Is it possible to get 450+ hp or more from the V6 with stock internals?

I am kind of thinking the V6S might actually be the sweet spot for this car... Less weight than the V8, lower base cost, and if the turbos are conservatively boosted from the factory, there might be the potential for them to perform better than the R with the right kind of tune.

Thoughts?

 

"Turbos"?

Mechanically driven supercharger...

As to what's been left, look at the shape of the torque curve: It should be bell-shaped given what's providing the forced induction.

 

wait, I thought the V6 was a turbo... both are SC?

My bad if that's the case...

 

Yes, both V6s are SCs.

 

Ok, I thought I had read somewhere that the S was a turbo 6 and not an SC... Been focusing so much on details with the R I guess I didn't do my due diligence on the S.

Nonetheless, I think my question still stands. How much potential does the V6 leave on the table? Are big HP gains possible by way of a tune/flash, or is the V6 pretty much maxed out from the factory?

 

I don't recall any members here reporting that they've tuned a V6 yet...

In general, there doesn't appear to be as much headroom to add extra HP compared to the German engines. All of the V8 tunes I've read about are < 100 HP gains, even with a pulley swap.

Compared to the 160 HP gain from a simple bench tune on my AMG, it's pretty disappointing...

 

Actually, unless I'm mistaken, I don't believe that is the case. I seem to recall someone on this forum several months ago publishing a dyno chart showing well north of 400 HP on the V6 with just a remap from a popular tuner. I also seem to recall that the gain is greater on the base car, because the V6S already runs a different tune from the factory. Otherwise, the base V6 and V6S engines are identical.

 

I must have missed that thread because I don't recall it.

I did a quick search and all I found was a reference to the RICA tune for the v6 that took both the v6 and v6s to 398HP, but it doesn't look like anyone has actually used their tune.

 

As I said, I could be mistaken. I can't recall where I saw it either as it was some time ago.

 

The V6S engine should be good for 450hp. It is deliberately undertuned to leave room for V8 sales in my opinion.

 

I have used the Rica tune in quite a few V6's. It is a big improvement on the base model & not as noticeable on the "S". They do not recommend a pulley with the tune at this time.

 

Still curious about what's limiting the torque...

 

There's been a lot of interest in this topic, moreso for the V8's, but it's the same situation.

The consensus now is that the ECU restricts the opening of the throttle; you simply do not get Wide Open Throttle. By limiting the throttle opening, the engines output is limited to set power (torque) values.

This is also seen as limiting boost, with the different V8 tunes showing different peak boost numbers.

No doubt it's the same for the V6.

What is actually used as the measurement value to determine when the ECU throttles the engine back is not 100% clear, but I suspect it's the mass airflow.

The "tunes" are in fact removing the limit values, or at least raising them, so that the throttle opens more.

This effect has been seen now on the earlier 4.2L engines running Denso ECU's, as well as the 5.0L running Denso ECU's and the current engines running the Bosch ECU's.

This is how one engine can have so many different power outputs;

470hp (XF & XJ Supercharged)
495hp (F-Type V8S)
510hp (various models)
550hp (various R models)
575hp (Project 7)

Absolutely same engine, just throttled back to limit power output.

Will be the same story with the V6 engine...

 

You guys with v8 conv can make exactlly the same hp as us with coupe r's for the same amount of money as we can with a tune, so about 610+.
When i had my tune done and found this out i actually felt a bit cheated because i was expecting to make that 50ish hp difference with a tune!!
Oh and the limiting factors as far as i know are torque limiters built into the ecu, so my tuner told me.

 

OE Tuning has an ECU tune that claims up to 427hp on the V6S:

https://oetuning.com/products/jaguar/jaguar-f-type-s.html

They have a good reputation, I've spoken to them before and I think Vic has used them on a bunch of cars.

http://m.yelp.com/biz/oe-tuning-huntington-beach

 

Is he installing a pulley as part of the tune?

 

Interesting and thanks. According to the description on their website, it appears to be just an ECU reflash. I would also assume that since the V6 engine in the base and S model are identical except for the OEM ECU programming, the base V6 output would be +87 HP.

EDIT: Revisited the OE website and found they also offer a tune for the base V6, which claims +42HP, as well as tunes for all the F-Type variants. They are all the same price. Can anyone think of a reason why you couldn't use the V6S tune on the base engine, since they are supposedly identical?

 

Because they're making a marketing statement based on a % increase?

 

I would suggest just calling OE to ask about the difference if you're curious. Jeremy is a straight up guy and will answer very directly.

If you so get a hold of them, let us know what you find out! I'm also puzzled as to why the v6 time would be different from the V6s.

 

You and I seem to be of the same mind on many things. That would have been my guess as well.