. i had a friend that has a car running 230bhp on a factory 4efte, using a turbo of a supra, which was slightly modified. people were so quick to jump to the conclusion that its not possible.
that is possible.
peoples points are though is that why is every tom dick and harry having to go forged pistons and rods etc, when all we had to do was buy a monkey ecu like an emanage ultimate some big injectors and a big turbo.
i'll believe it when i see it, but for now it's just impossible.
i would say its possible to run that turbo at 1.2bar on stock internals with a decent map, but it cant cope with any more imo
Would I want to drive that car over my own proposed solution (At least 60% less power, perhaps more)? Nope, that car would be useless on pretty much any UK race track.
Would I want to drive that car over my own proposed solution (At least 60% less power, perhaps more)? Nope, that car would be useless on pretty much any UK race track.
Those dyno graphs appear to have a fairly reasonable torque curve to my eye, obviously not much of a streetable motor but with the correct gearing you could keep that consistently in its powerband around any circuit I can think of..
Having said that I'm not familiar with the gearboxes these cars use.
From my experience in these cars it wouldn't be a joy to drive with a huge lack of anything below 5,500 RPM, I've looked at videos of this car and it's not for me. The standard car reaches full boost at around 3,000RPM.
You look at a dyno with different eyes, I like to see overall useable area underneath the power and torque curve. At 4,000RPM I expect to be seeing the torque figures that car is around 5000 - 5500RPM.
The gear ratios are very short, even in stock form the car is quick at accelerating in most gears. A burst of huge power and torque over a 2,000RPM duration, coupled with the lack of traction and steering ability is not my idea of quick track times.
In Lewis' GTxx which I took to Llandow the setup was ideal (In engine terms), a carefully selected compressor gave the car good pulling power out of the corners at under 4,000RPM, whilst still mainting its puff up to 8,000RPM. He recently found it has 164BHP - on the day it was as quick out of the corners and a straight line than his own TD04 GT with not far off a 100BHP advantage. There were other cars like Nick's that proved you don't need huge power figures, you need the right compromise. Obviously though it was a small track and less suited for top speed.
Other factors are
- Why rev (overload) the engine when you can extract plenty of power and torque mid to high range with the right turbo.
- Large surge of torque is more likely to damage gearbox teeth, clutch components, driveshafts.
Gearing is not something that's easily modified on a car that's almost 22 years old, and with very little aftermarket components. Being able to modify a CB80 is a challenging job, you have little option but to work around the limitations, hence why turbo selection and engine characteristics is very relevant
My focus has been to avoid extracting everything from the engine, but concentrate on weight saving and rotational dead weight. I want a reliable car, but there will still be a very attractive power to weight ratio.
Is that Al by any chance, from Driven Performance?
Yes I'm seeing the same things, but would rather it be proven before a route I'd take. Starlet boxes are certainly a strong point, GTti's are known for a weak fifth and you have to be careful with big or sudden torque figures.
I have stumbled upon some gear sets available in australia, they also make some for the Starlet. http://www.albinsgear.com.au/
For all the naysayers, a 4EFE is considered to be too much of a weak platform for turbocharging. Yet back on the old forum and there were pics showing the engine bay etc. Dale from Australia whose company was called braidedlines.com turbocharged his girlfriend's 4EFE Starlet and using a water to air intercooler and Microtech stand alone ECU plus TD04L he made 190WHP on all standard internals. All this info was lost when the site got hacked several times. @ KrissyB who claims that a 9.8:1CR turbo 5EFHE cannot last 5 minutes, here in Florida we have several running 16PSI daily driven on 93RON Octane with 4EFTE electronics, (ECU wire loom, coil & ignitor) plus eManage Blue for 5+ years. The key to making these standard internal 5E'S live is all about the timing and careful tuning of the AFR. In all things automotive you have to keep an open mind. In 1973 Ford campaigned two Ford Capris in the old FIA Group 5 series running 1.4 litre turbocharged BDA'S that made 373HP. These cars ran against 2.7 litre turbocharged Porsches and ran very well until Porsche stepped up their game and the Fords had to change to 1700cc engines. In 1983 BMW'S F1 1.5 litre turbo engine made 1500WHP in qualifying trim. Yes these are purpose built engines but we have come a long way, so why all the doubts? In 1983 I drove an original Mini equipped with a turbocharged 1293cc engine with Lucas mechanical fuel injection and a Holset turbo. It was rated at 180HP at the flywheel. This engine was featured in the old Car & Car Conversions magazine back in the day and was campaigned in a Mini in the UK from where it was sold to one of Barbados' premier racers and then bought by a friend of mine in Jamaica.
On another note Rhys Millen is campaigning a Pontiac Soltice Turbo in the D1 drift series and yes he is using alcohol as fuel and the compression ratio is 14:1
Is that Al by any chance, from Driven Performance
Im starting a new thread dude about Horse power etc please explain in there fella