Johnnybravoturbo’s signature... 717bhp

Come on then fella, spill the beans!

I noticed that last night - went searching for other posts to explain the numbers (didn't find anything)

ISTR the Brazilian 20vt (in a Marea shell) was the highest power for a 20vt at about 670 - has JBT stolen the power crown for the Brits?

It was 767bhp

Epic!

I just thought that its his LE number!

Anything about this?

I believe he's not posting things up anymore after the discussions with Pero et al went sour.

From the sig it would seem he's converted from 2.4 to 2.5....

Impressive numbers indeed!

I believe he's not posting things up anymore after the discussions with Pero et al went sour.

From the sig it would seem he's converted from 2.4 to 2.5....

Impressive numbers indeed!

WTF 717BHP! damn make my car seem low powered! well done johnnybravoturbo rsepect has to go out to those testing the limits and boundaries of the coupe!

The sig has been 2.5 fit awhile

Yes 717 Bhp was the latest horse power figures.

However it does come at a cost,up rating the turbo to a bigger unit has made the power delivery even in 3rd uncontrollable.
So yes ruined the drive and delivery over the 600 setup and I was 7 seconds slower per lap than the previous setup making it ideal for a drag car but not street/track which is where it is used.
The lag is also annoying when cornering at slow speeds,defeating the object of the 2.5-2.6.


Even in track situations where there's no undulations or gradients such as the road it still lights up the front even at 1.4 bar.

All on road fuel (tesco 99 ) I'm not a fan of the race fuel option as it inevitably causes head issues (valves and seats) with prolonged use and its too unstable I.e needs constant monitoring on afr due to octane variances.

Had to exceed 2 bar slightly using a custom lined 2.6 block from the states.
Crank,driveshafts,and engine mounts seem to cope fine as does clutch and other components so far.
Done around 500 miles on the setup.

Daren't take it to the 1/4 as I sheared the input shaft in half last time on the 600 setup when launching as some of you may remember the pictures .

So yes the power is correct but honestly the car is pants.

Maybe it's time for a 4WD conversion then?

Supra From hell !!: http://youtu.be/R6PJA9tb66E

if your going to run large ponies there's only one end the dive should be coming from.

Agreed,
But won't be done by me,as I was happy with the fwd setup.

Well done on the 717bhp and its a shame it's made it unfriendly to drive now compared to your old setup.

Did you have it mapped at the same place also where was it dynoed?

Would be good to see the graph to see what the power delivery is like compared to your old setup

Just out of interest, what was the power level tgat you felt happiest with?

Maybe think about a device like this? Clicky

500 bhp@1 bar was perfect

VERY impressive John! And refreshing to admit that its a tad pants as a result, im sure it just needs final work and tweaking, how about traction control?

Eeesh. Congrats on breaking 700bhp. How much torque?

Be lovely to see it on a dragstrip but can imagine its a handful.

https://m.youtube.com/watch?v=054X9VHRyoE

No point being dishonest about it ,I'm sure its great for scaring passengers but it scares the crap out of me too as it isn't tractable.
Like holding onto one of those wild bulls at the fair.
Currently working on the Omex but it just doesn't do the job like the driver.
Induces too much lag.
I'm very tempted to revert back to the old setup as this ones useless,and to be honest it was more about pushing the boundaries than hoping for a perfect delivery.
I still have it in the workshop,so maybe selling this setup early next year.

That standard crank is impressive ,as are the shafts and many other standard components with nearly 4 times manufactures power.

Jesus that's a wall of power, you couldn't use that one the road. 300+ hp change in a few rpm is crazy!

2.5 and 500bhp was more than controllable even in the wet.
The displacement made it more linear than the 2.0 so wasn't as much drama,but the downside is you hit stupid speeds a lot quicker without knowing .

John, honestly this is where the difference in engine management systems and the calibrator plays a huge role. Drivability is key, as road car users we typically spend ~1% of the vehicle's lifetime at full throttle, put quite frankly the OMEX ECU is too basic to check all of the boxes you require from this beast even with the most experienced engine calibrator. I moved away from such an ECU years ago because not only are the features not up to scratch but the people who tune them are not either (no offence but 95% of so called engine mappers just play with fuel and spark tables, that's it!!!), the OMEX firmware has not changed since 2005 either!! (and no that does not mean it's 100% perfect from day one, it means they are almost 10years behind, I mean do you still use a 10year old computer running Win98 for your daily tasks?). I know I've preached this a few times (and sorry for sounding like a broken record) but the drivability is only as good as the person who maps it and good mappers (i mean really good) don't use pony sport ECUs. Anyone can map the top line for pub numbers that's easy the hard parts are warm-ups, transient fuelling, anti jerking, boost progression, knock control, traction control, launch control, idle control etc.....Because most are iterative processes without proper datalogging it's just subjective guess work and you end up with inconsistencies in your map. The system I speak of covers everything and very intuitive to use for the experienced calibrator meaning setting up even the advanced functions is as quick if not quicker than a less powerful ECU. It can be fully torque model based with proper features that actually work and best off all it is not that much more than your typical 710 price, quite frankly the difference in performance is night and day. If you want my honest opinion I think you need to fit a throttle by wire system and ditch the OMEX for a Syvecs using an experienced Syvecs trained mapper, your car will be completely transformed and you will be on cloud nine.

Best Regards,

-TJ

My father has the Syvecs ECU fitted and the car runs like factory in every way only it has around double the power of your standard 20vt.

He is in the middle of a few more choice mods and it will all come together in the new year some time them it will need a tweak on the map.

The mapper we used in the past was recommended as he is a authorised Syvecs dealer/supplier but he has never worked on a Fiat coupe before (which worried us) and he is a Nissan or Jap specialist.

Any advice or recommendations on a good mapper of Syvecs for the coupe Turboj? Or anyone else?

Syvecs are a big name in the supra world.

Completely agree TJ,
Thanks for taking the time to respond.

The syvecs ecu would be my choice,and is far superior ,however then your in the realms of trusting a stranger with your car,5k of your money and potentially be back to square one.

There's not many mappers who would map this platform
With that ecu at this level of performance and actually spend the time not only making sure all the safety features are in place but also taking the time to perfect the rev range.

So at this stage I know what your saying but its finding someone who can walk the walk.

Syvecs actually started out of the back of Surrey Rolling Road (Pat & Charlie). In the initial stages they wanted a product that could replace the stock Subaru ECU plug and play as the current ones were just not good enough (see my reasons in the previous post). They approached a professional engine management company and co jointly developed their very own S6 ECU "plug and play" and firmware, during this time a numerous amount of daughter boards were developed to support various vehicle plugins such as Toyota Supra's; and due to this one of the worlds finest mappers (Ryan) got on board with the product hence why they dominated this market for so long. Later they developed a universal S6 and then took on a re-branded version of the F88 dubbed the S8. Now they specialise in producing the worlds finest control systems for fast road, drag and the plug and play market for great value. The firmware and PC applications are constantly updated with new strategies added so much so that the first ever sold S6 can actually run the latest code with a 5 second update FOC. They have a very strong and capable dealer network with mountains of experience and contacts.

Some further history here:
http://www.mkivsupra.net/vbb/showthread.php?230805-Life-Racing-Syvecs

There are many capable mappers for Syvecs dotted around the country (or world for that matter) and are very reasonably priced, not any different really from what you would pay for any other dyno time with a less capable mapper and ECU. It is probably best to speak with Syvecs HQ and voice your concerns about your current system and what you want to achieve if switching to Syvecs, they can the put you onto an approved dealer. I would choose an experienced mapper over an experience 5 cylinder coupé specialist any day and in John’s case he has enough knowledge of the 20VT to know the possible hardware pitfalls. Remember these guys are mapping cars that people spend in excess of $100,000+ on a daily basis, not something I would do without a sophisticated ECU that’s for sure!

TJ

Funny you mention that Ryan guy as that's who I first got in touch with for the mapping. He didn't seem to interested, maybe he was very busy which is fair enough but I get the feeling that we were maybe small fry if you like. He was the one who recommended the guy we went to in the end. Like I say the car runs perfect. But he didn't know much about the coupe.

Thanks Jay

Will drop you a pm in the new year when the weather picks up a bit .

I've known Ryan for a long time and worked with him personally on many projects in the past, he is one of the most talented engine calibrators I have ever met and I have worked with professional engineers in high level Motorsport and Automotive control systems. In recent years his role has progressed to 'Technical Director' of Syvecs and as such spends most of him time developing new systems rather than mapping end users, he is in very high demand with wealthy clients flying him across the globe to work his wonders on some incredible machinery. Anyone Ryan recommends is likely personally trained by him and for management systems like Syvecs you do not need a car specific specialist but a competent and experienced calibrator who fully understands engine principles and how to adapt the management system for a particular application. Whoever is mapping your car you will be in safe hands.

Anyway I don't want bore and hijack this thread any further, I just wanted to openly inform JBT that there is a solution to his drivibilty issues; so back to discussing the increadble spec of this engine, what's the parts list then?

Thanks for the reply mate, sounds good.