Emira JB4 Tuning Now Available for I4 & V6 Cars!

[Dweby]

Maybe I missed it, but is there a more concrete plan for when these will be shipping out?

 

[NorCalEmira]

It will not heat soak for short street pull or 1/4 - 1/2 mile drag race but for tracking it is another story. Heat soak and durability could become a problem over time if tracked.

I think it's fair to say that the answer to this question would require testing that hasn't yet been performed.

The intercooler was engineered with some boost limits in mind but we don't know the margin that has been built into the design. We aren't massively increasing boost here and there have been factory tunes to 430 hp with this motor so odds are in our favor. If you find that 0-60 times begin to increase after a series of runs, the platform would benefit from a larger or more efficient intercooler but no one knows that at this stage.

I look at the Emira GT4 platform for inspiration as to what would be race worthy and that car includes a motor with forged pistons, stronger rods and a larger Harrop supercharger capable of delivering higher boost. Time will tell about the durability of the factory platform with a JB4 tune in place but the 91 octane tune isn't far from what the factory delivered in the Evora 430.

 

[NorCalEmira]

Maybe I missed it, but is there a more concrete plan for when these will be shipping out?

The announced target was this week but nothing definitive yet.

 

[TurboTambo]

Nice, i should have waited a few more weeks as I have the TDI unit. This Jp4 looks better. As far as installation its a pian in the ass with the Turbo. I uploaded the install on another thread which should be the same as for the JP4. That one boost sensor is a bitch that's just above the AC compressor. As to performance, the Turbo US or SE will always be faster than the v6. The DCT alone is a HUGE advantage. I've driven a 6 speed Elise for 20+ years and I ain't missing it at all. The DCT is so much faster and more modern. I am quite enjoying it. The video showing a race between the two models is shocking

Do you have a link to this i4 v V6 comparison race video please?

 

[David s]

Do you have a link to this i4 v V6 video please?

I think they have to deliver a few of these before they pump out a few videos.

 

[TurboTambo]

I think they have to deliver a few of these before they pump out a few videos.

I meant the comparison race between the stock i4 and v4. I've just updated the question. Cheers

 

[mr.suntorytime]

I meant the comparison race between the stock i4 and v4. I've just updated the question. Cheers

im trying to find the i4 owner. but hes not easy to find.

 

[Lotus F1]

I'm just going to get a draggy pro and see what it does

 

[Lotus F1]

Do you have a link to this i4 v V6 comparison race video please?

 

[seriously]

I think it's fair to say that the answer to this question would require testing that hasn't yet been performed.

The intercooler was engineered with some boost limits in mind but we don't know the margin that has been built into the design. We aren't massively increasing boost here and there have been factory tunes to 430 hp with this motor so odds are in our favor. If you find that 0-60 times begin to increase after a series of runs, the platform would benefit from a larger or more efficient intercooler but no one knows that at this stage.

I look at the Emira GT4 platform for inspiration as to what would be race worthy and that car includes a motor with forged pistons, stronger rods and a larger Harrop supercharger capable of delivering higher boost. Time will tell about the durability of the factory platform with a JB4 tune in place but the 91 octane tune isn't far from what the factory delivered in the Evora 430.

I think 430ish is definitely safe since the evora achieved the same on pretty much the same platform. GT4 may be good for inspiration, but they build those race engines to last a race season (or less), not really for the long run.

I'd be inclined to run a higher HP setup on the street and lower HP setup for any serious track time. Fortunately, it seems very easy to swap maps using the mobile connection.

 

[Eagle7]

I seem to remember reading somewhere awhile ago that Lotus increased the strength of the internals on the V6 manual trans for the Emira. They didn't just use the same gears that the Evora had. The Evora trans could handle up to 368 ft lb (500 nm) of torque, so if you stay within that limit it should be safe. Beyond that... who knows.