Evora NA engine tune and 4.0

Evora NA engine tune and 4.0

Author
Discussion

larger

Original Poster:

57 posts

225 months

Sunday 8th November 2020
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Hi
I was wondering if anybody has applied any straightforward tweaks to the 3.5 NA PU to get the output up?
Also looking to try and understand the 4.0 NA used in GT4 race cars.Is this just a version of the 4.0 utility vehicle engine is something more exotic?
Cheers for any help.

rhdv8

113 posts

173 months

Sunday 8th November 2020
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electro_boy

7 posts

29 months

Monday 9th November 2020
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I've done a bit of modding to my Evora's NA engine, it's currently outputting 313bhp and 267 ftlbs.

- Cold air induction kit form BOE Fab
- Larini exhaust headers
- SCS Delta ECU
- Custom tune

All the work was done by ES Motorsport, who are very knowledgable and experienced. They also have a 4.0 litre engined road going Evora for sale.

I also had a custom intake and exhaust cams on the shopping list but ES are still developing this, they weren't happy to release it to me. They have a solution that works and is tried and tested on a few super charged cars but mine was the first NA car to get the work done so theres are a few things they need to work out first.

larger

Original Poster:

57 posts

225 months

Tuesday 10th November 2020
quotequote all
Thanks, that’s very helpful

blueg33

26,895 posts

192 months

Tuesday 10th November 2020
quotequote all
When I looked at the cost of upgrading my n/a it looked like the most power I would get was around 320-330bhp.

It was much cheaper to upgrade to an S and get 350bhp.

larger

Original Poster:

57 posts

225 months

Tuesday 10th November 2020
quotequote all
blueg33 said:
When I looked at the cost of upgrading my n/a it looked like the most power I would get was around 320-330bhp.

It was much cheaper to upgrade to an S and get 350bhp.
S does seem very simple way to get the power for a road car. I am looking at a race application and want to understand the potential upgrade path for standard N/A engine as I want the durability/simplicity.

blueg33

26,895 posts

192 months

Tuesday 10th November 2020
quotequote all
larger said:
S does seem very simple way to get the power for a road car. I am looking at a race application and want to understand the potential upgrade path for standard N/A engine as I want the durability/simplicity.
Ah, thats a whole different kettle of fish

paul n

197 posts

137 months

Thursday 12th November 2020
quotequote all
electro_boy said:
I've done a bit of modding to my Evora's NA engine, it's currently outputting 313bhp and 267 ftlbs.

- Cold air induction kit form BOE Fab
- Larini exhaust headers
- SCS Delta ECU
- Custom tune

All the work was done by ES Motorsport, who are very knowledgable and experienced. They also have a 4.0 litre engined road going Evora for sale.

I also had a custom intake and exhaust cams on the shopping list but ES are still developing this, they weren't happy to release it to me. They have a solution that works and is tried and tested on a few super charged cars but mine was the first NA car to get the work done so theres are a few things they need to work out first.
wow sounds amazing, would love to see some more details/ videos of this set up. I am just about to order myself the BOE kit! smile

electro_boy

7 posts

29 months

Saturday 14th November 2020
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Yep most cost effective method of poet upgrades is to swap NA car for S version.

But I liked the idea of a NA car so I am pursuing this path even though I know it’s going to cost more.

electro_boy

7 posts

29 months

Saturday 14th November 2020
quotequote all
@paul n, unfortunately the car is back with ES motorsport at the moment getting a service so can’t take any photos or videos of the engine bay. But there isn’t much to look at anyway it’s quite a cramped engine bay and not a looker.

Not sure what details you are after please feel to ask anything I’ll do my best to answer.

Regarding the air intake I went for a BOE Fab, at the time there were only 2 available BOE Fab and Radium. There are some reports that the Radium kit leans the air to fuel ratio so the BOE version looked more reliable. There are a few more options now, Alias23 does one for the Exige which could be converted for the Evora as they have same engine, I think ES motorsport also are working on one too so you may not have to import from US.

For the exhaust headers I went for Larini on advise of Dave at ES motorsport. These are longer than the 2bular and he thought creates more power for a NA engine. This also removes the two precats from the engine bay and reduces heat soak.

They then put in an aftermarket ECU from SCS so everything could be tuned to make sure it’s operating optimally. The standard ECU should deal with the extra breathing fine but I wanted to make everything was 100% plus the original plan was to all drop in some custom cams which would have required tuning. So using a aftermarket ecu allowing easy retuning of the engine. This retained almost all the OEM functionality, cruise control, traction control etc. Only thing not there is the tyre pressure sensors. The custom ECU allowed retuning of the throttle map too. The standard car can feel a bit slow due to the very linear throttle map and many people prefer to drive in sport mode. ES being proper racers put a very sharp throttle map on my car and while great on a fun drive it was hard in day to day traffic. So they changed it so that in 1st and 2nd gears the maps is just a bit a sharper than normal allowing me to easily pull away at traffic lights without loads of revs. Then in each gear the map gets more progressive. The tune feels very natural and you don’t realise it changing from gear to gear and gives me the best of worlds, easy day to day driving but also peppy feeling throttle response.

The air intake and headers give the car a fantastic sound, the induction noise of the engine sucking in air is amazing and headers give the exhaust note both increased quality in sound and quantity. I’ve had many comments at track days how great my car sounds. This is while sharing the track with very heavily modded track cars and also other exotic cars. I have a mate with a Mac 570(?) and he says my car sounds much better than his.

You can feel the power increase in the car, it pulls better in the mid range and keeps pulling at higher revs right to the redline. The standard engine was running out of breath near the redline but mine just keeps giving and I’m always chasing that redline constantly, the noise is very addictive.

paul n

197 posts

137 months

Saturday 14th November 2020
quotequote all
electro_boy said:
@paul n, unfortunately the car is back with ES motorsport at the moment getting a service so can’t take any photos or videos of the engine bay. But there isn’t much to look at anyway it’s quite a cramped engine bay and not a looker.

Not sure what details you are after please feel to ask anything I’ll do my best to answer.

Regarding the air intake I went for a BOE Fab, at the time there were only 2 available BOE Fab and Radium. There are some reports that the Radium kit leans the air to fuel ratio so the BOE version looked more reliable. There are a few more options now, Alias23 does one for the Exige which could be converted for the Evora as they have same engine, I think ES motorsport also are working on one too so you may not have to import from US.

For the exhaust headers I went for Larini on advise of Dave at ES motorsport. These are longer than the 2bular and he thought creates more power for a NA engine. This also removes the two precats from the engine bay and reduces heat soak.

They then put in an aftermarket ECU from SCS so everything could be tuned to make sure it’s operating optimally. The standard ECU should deal with the extra breathing fine but I wanted to make everything was 100% plus the original plan was to all drop in some custom cams which would have required tuning. So using a aftermarket ecu allowing easy retuning of the engine. This retained almost all the OEM functionality, cruise control, traction control etc. Only thing not there is the tyre pressure sensors. The custom ECU allowed retuning of the throttle map too. The standard car can feel a bit slow due to the very linear throttle map and many people prefer to drive in sport mode. ES being proper racers put a very sharp throttle map on my car and while great on a fun drive it was hard in day to day traffic. So they changed it so that in 1st and 2nd gears the maps is just a bit a sharper than normal allowing me to easily pull away at traffic lights without loads of revs. Then in each gear the map gets more progressive. The tune feels very natural and you don’t realise it changing from gear to gear and gives me the best of worlds, easy day to day driving but also peppy feeling throttle response.

The air intake and headers give the car a fantastic sound, the induction noise of the engine sucking in air is amazing and headers give the exhaust note both increased quality in sound and quantity. I’ve had many comments at track days how great my car sounds. This is while sharing the track with very heavily modded track cars and also other exotic cars. I have a mate with a Mac 570(?) and he says my car sounds much better than his.

You can feel the power increase in the car, it pulls better in the mid range and keeps pulling at higher revs right to the redline. The standard engine was running out of breath near the redline but mine just keeps giving and I’m always chasing that redline constantly, the noise is very addictive.
Sounds awesome! I think I am going to get the BOE intake soon (hopefully a black Friday discount!) and see how that goes and then maybe headers and a tune in the future. Do you have the short ratio box or the long/ normal?

electro_boy

7 posts

29 months

Saturday 14th November 2020
quotequote all
I have the short ratio gear box in my car.

I have also recently upgraded the gear shift mechanism to the newer one used in the 4XX cars, I also have the 4XX lightened fly wheel and clutch.

The newer mechanism is night and day better than the older one made from pressed metal. Much more accurate and reliable shifting. No more baulking when shifting across the gate, slots in gear every time.

The lighter flywheel is great for the quicker throttle response but it does make traffic driving or parking the car a bit harder. I’d say if you don’t track your car or don’t heel and toe a lot when driving stick with the normal flywheel.

paul n

197 posts

137 months

Monday 16th November 2020
quotequote all
electro_boy said:
I have the short ratio gear box in my car.

I have also recently upgraded the gear shift mechanism to the newer one used in the 4XX cars, I also have the 4XX lightened fly wheel and clutch.

The newer mechanism is night and day better than the older one made from pressed metal. Much more accurate and reliable shifting. No more baulking when shifting across the gate, slots in gear every time.

The lighter flywheel is great for the quicker throttle response but it does make traffic driving or parking the car a bit harder. I’d say if you don’t track your car or don’t heel and toe a lot when driving stick with the normal flywheel.
I think i am quite lucky as the gear shift in my car seems decent for an early car. Not bulked on me yet but it just had a new clutch so imagine that helps. lighter flywheel would be nice but as you say it has it's down sides! I find heel and Toe really easy in the evora so that is a plus also smile



crispyj

96 posts

135 months

Sunday 28th March
quotequote all
Just a quick question. Are the na and supercharged engines the same internals? Pistons compression ratio. Etc. Thanks

giveitfish

3,611 posts

182 months

Sunday 28th March
quotequote all
Yes, identical AFAIK - Lotus don’t touch the internals of any of the Toyota engines they buy in.