Emira JB4 Tuning Now Available for I4 & V6 Cars!

[Lotus F1]

[But would be helpful for all to hear more feed back.]

Hey David, Yeah there have positive post for sure, with peoples butt dyno.

However, members with Draggy or RaceBox meters haven't reported substantial performance improvements in 0-60 (~0-100) or 1/4 that lines up with 90 extra HP. The results posted line up with much lower HP improvements. Think you could expect 0.2 sec off 0-60 for each 25-30HP increment added.

Do you have performance meter? If not, you should pick one up they are pretty inexpensive these days.

But i have with my draggy pro

 

[Tomwa]

Hi Greg,
A cooling engine under-tray, similar to what GRP already offers for the Evora, would perhaps be a more practical solution for extra venting, particularly since water and debris penetration into the engine bay would be a non-issue. Could that be developed for the Emira?

Keep in mind, the Emira has more cooling integrated into the stock undertray than the Evora had. I'm not sure if a revised cooling tray would improve engine bay temps.

 

[FST]

But i have with my draggy pro

How did you get the pro app working? So far only the paid app works

 

[NJemira85]

is the Emira ecu somehow more capable than the Ferrari (Alfa) and bmw ecus of cancelling out the jb4?

 

[crestima]

Keep in mind, the Emira has more cooling integrated into the stock undertray than the Evora had. I'm not sure if a revised cooling tray would improve engine bay temps.

Hmm, not sure I'd agree with that entirely, particularly with the notion of there not having room for further venting improvement.
I removed that under tray 3 times so far. I did find a layered aluminum panel on the inside part of the tray, which I presume somehow helps direct hot air through to the rear plastic diffuser tray and outward through the lower rear bumper black mesh. What I did not find however, was any open sections to let heat escape directly through the bottom of the tray. I noticed that his is present in the design of Evora's GRP Evora cooling tray with a couple of open breathing holes (I'd actually prefer if they were scaled louvered ones) as well as a wide rear facing vented grid.
Adding extra venting sections to the bottom of the tray, I'd imagine should help hot air escape directly and faster, which should help to lower engine bay temps but, admittedly, I'm not sure if this solution has any merit after all if somehow it causes a detrimental effect to the aerodynamic airflow of the car's under section. I'd prefer to leave that to the research and expertise of the product's designers. It was just an idea/suggestion on my part.

 

[Lotus F1]

How did you get the pro app working? So far only the paid app works

I only know of one app. What are you referring too

 

[Emira Fan]

Hi - Lotus F1 - what was 1/4 mile ET on Map 4?

 

[Lotus F1]

Hi - Lotus F1 - what was 1/4 mile ET on Map 4?

i have my own thread with the results JB4 and draggy

 

[Tomwa]

Hmm, not sure I'd agree with that entirely, particularly with the notion of there not having room for further venting improvement.
I removed that under tray 3 times so far. I did find a layered aluminum panel on the inside part of the tray, which I presume somehow helps direct hot air through to the rear plastic diffuser tray and outward through the lower rear bumper black mesh. What I did not find however, was any open sections to let heat escape directly through the bottom of the tray. I noticed that his is present in the design of Evora's GRP Evora cooling tray with a couple of open breathing holes (I'd actually prefer if they were scaled louvered ones) as well as a wide rear facing vented grid.
Adding extra venting sections to the bottom of the tray, I'd imagine should help hot air escape directly and faster, which should help to lower engine bay temps but, admittedly, I'm not sure if this solution has any merit after all if somehow it causes a detrimental effect to the aerodynamic airflow of the car's under section. I'd prefer to leave that to the research and expertise of the product's designers. It was just an idea/suggestion on my part.

It's BOE's undertray (Not Greg's part, he just sells). I'm not sure I understand what you mean.

There's a front gridded opening to the undertray to try to 'scoop' air up under the engine bay and throw cold air over the exhaust and other parts of the engine that hang low.

There are no 'openings' at the back of that under-tray from BOE for letting hot air 'out'. Hot air generally speaking won't go out that way, and would mess up the diffusers purpose if it did.

The panels adds an opening to grab air, some 'kick ups' to direct said air to trouble areas for Evoras, and has a few cut outs to make room for exhaust bits (particularly aftermarket headers). Nothing in the design is 'pulling' hot air out of the engine bay. It is grabbing more cold air and then the air will follow any number of pathways out of the car. Most likely out the grate in the rear bumper above the diffuser.

 

[mr.suntorytime]

It's BOE's undertray (Not Greg's part, he just sells). I'm not sure I understand what you mean.

There's a front gridded opening to the undertray to try to 'scoop' air up under the engine bay and throw cold air over the exhaust and other parts of the engine that hang low.

There are no 'openings' at the back of that under-tray from BOE for letting hot air 'out'. Hot air generally speaking won't go out that way, and would mess up the diffusers purpose if it did.

The panels adds an opening to grab air, some 'kick ups' to direct said air to trouble areas for Evoras, and has a few cut outs to make room for exhaust bits (particularly aftermarket headers). Nothing in the design is 'pulling' hot air out of the engine bay. It is grabbing more cold air and then the air will follow any number of pathways out of the car. Most likely out the grate in the rear bumper above the diffuser.

yes and the Emira essentially is a closed system. it doesn't have enough venting topside when hot. which is why we all want louvered hatch glass.

 

[Tomwa]

Also Also.

BOE in their own product description effectively admit that this part is equivalent to the Evora 400 and beyond cars come with a engine panel that does what they are selling.

It's just that it can cause contact with aftermarket headers (which were likely designed before such trays were default).

Every other benefit BOE claims about their under-tray is that if you don't already have an Evora 400/430/GT undertray...they are hard to get a hold of, so buy theirs instead.

Well. Good news. The Emira DOES have the Evora GT equivalent undertray... so an undertray from BOE will not likely do anything for you.

 

[crestima]

Also Also.

BOE in their own product description effectively admit that this part is equivalent to the Evora 400 and beyond cars come with a engine panel that does what they are selling.

It's just that it can cause contact with aftermarket headers (which were likely designed before such trays were default).

Every other benefit BOE claims about their under-tray is that if you don't already have an Evora 400/430/GT undertray...they are hard to get a hold of, so buy theirs instead.

Well. Good news. The Emira DOES have the Evora GT equivalent undertray... so an undertray from BOE will not likely do anything for you.

Excellent, good news indeed, you can then dismiss my suggestion. I brought it up simply to explore an alternative to replacing the rear lid glass with anything that has holes, with or w/o louvers, which would invite water and debris into the engine bay. But that's just me.

 

[seriously]

We’re all just brainstorming out loud here. I would personally be concerned with water and debris ingress from the bottom. There is already forced air from one of the intakes. I assume better venting from the rear hood would be hugely beneficial. There is already good venting out of the rear.

 

[Tracked Emira]

yes and the Emira essentially is a closed system. it doesn't have enough venting topside when hot. which is why we all want louvered hatch glass.

JUBU vented louvre already solves this problem after you remove the rear windshield

 

[David s]

View attachment 66584
JUBU vented louvre already solves this problem after you remove the rear windshield

Not sure about the look of that. I kind of like the smooth lines the rear screen provides. Could take a bit of time to like it, then I’ll probably love it. I’ll give it time for now. But I do see the benefits it would provide.

 

[David s]

View attachment 66584
JUBU vented louvre already solves this problem after you remove the rear windshield

A Louvre like this would require a rear wing to complete its look. Without a wing, probably a poly glass with vented hole like the Ford GT40 could look quite good. I’m not too worried about water. These engines are fairly waterproof. My Ex 410 got loads of water in the engine bay with no problems at all. Could be wrong though.