TVR Chimaera turbo build thread - Dyno results are in!

I totally agree, your car, your way. It always interests me what the people that comment negatively drive / build. Good luck with the build, it's certainly going to liven it up no end. I built a stock 3500 with twin turbos before on suck through SUs and had a 30% increase in power and torque after an hour on a rolling road with very good tuners. The only way I can describe it was explosive, this resulted in my FI addiction...... 😱😊

I ran my old twin turbo v8 on a dual point dizzy 👍🏼

allot of 80s turbo cars didnt even have boost controllers, the actuator was plumbed directly into compressor housing. laaag !

in my experience, sequential injection was just a means to an end for efficiency and tail pipe emissions, not safety. as has been stated already would take mind bending amounts of time and cash and development to map, in that much resolution, in an aftermarket ecu, from scratch. for a mass produced car with millions invested into it you might take it on the chin, but for a DIY home build, its not worth the outlay.

the only downside i have witnessed with batch firing is that you are delivering half the amount of fuel, twice as often. so it tends to give old high latency bosch injectors an absolute battering, as they cant open and close quick enough at lower rpm, to deliver such little amount of fuel. especially so if you are running fixed rate fuel pressure

Guys, I'm surpised the discussion took the wrong direction. I did't mean to sound derisive at all! May be because the language I'm trying to practice is not my native one, I just don't use the words the same proper way as you do. I do respect everyones work here as well as everyones desision how to proceed with his own car.
Concerning the last opinions and shared personal experience, I have nothing to say or add.

cannot wait to hear this at flat chat with that screamer pipe screaming hoping there will be videos when all done

A bit earlier than planned but another update

The welding is now done. Wastegate takeoff, screamer pipe and the internal wastegate on the turbo. Very happy with the wastegate welding as it is cast iron to stainless and apparently is very easy to crack, but thankfully my friendly tig welder did a great job!









I also turned up a little bung today which allows me to fit the air temperature sensor in the silicone t-piece by the plenum. When the car was NA it was fitted in the front of the car by the air intake, as in the engine bay it suffered from heat soak. I am hoping that by mounting it in nylon / silicone it will insulate it from the external heat, only time will tell though. If it is still not great I will fit it in the front of the car in the cold side of the intercooler (a common solution for turbo MX5 apparently)

New wheels and tyres here

My twin turbo 1 uzfe runs microsquirt and edis 8 , the only issue I've had is having to switch to simultaneous fire for both inj banks to get the idle smooth and it doesn't like to idle above 14-1 . For £350 and running 8psi off the wastegates I don't see any benefit in spending any more on management . at 10-1 Comp I did all the tuning on supermarket super unleaded so I don't have to worry about finding v power plus it's added protection when you do run v power . 8psi is 360hp 380 lb ft and done 5000 miles plus a couple of track days with no drama .

Offset cross member made up today to clear the turbo.

My special wooden jig thingy





Getting there



Notched for the turbo and swirl pot plate welded back on. Fits like a glove



Lick of paint



On Tuesday I will get the coolant system plumbed back in and filled, refill with oil and it will be ready for the first start!