Harrop TVS86 Owners Thread

[Irace86.2.0]

Originally Posted by johan

That is a different type of belt. Tooth vs Rib.

Right, but the reasoning works the same. You have a small pully on your kit?

[johan]

Originally Posted by Irace86.2.0

Right, but the reasoning works the same. You have a small pully on your kit?

85mm. Stock is 95mm.

[Rolla]

@HarropOz

Does the Australian emissions tune come with any driveline warranty? Did you look at cylinder pressures like Cosworth for durability?

I'm interested in the base kit as a DD proposition.

Is the kit going to be modified for the 17+ cars?

[Rolla]

[ame="https://www.youtube.com/watch?v=I_Chws-XA70"]https://www.youtube.com/watch?v=I_Chws-XA70[/ame]

Flex fuel and flex boost setup

[kuczynskika]

Originally Posted by Rolla

Flex fuel setup

Thanks. Posted on the front page!

[johan]

Originally Posted by Rolla

Flex fuel setup

I'm glad they did this.

I noticed when installing the blower that it came with a dual port bypass actuator, making it possible to add boost-by-gear to the blower.

I plan to add this on mine at some point so I can turn boost down at low RPM (1000-2200rpm). With the automatic transmission in my car, the sudden boost at low RPM with the 85mm pulley makes the car really jerky and there's nothing to do about it without using the bypass to force the SC to bleed off boost.

[Kodename47]

Originally Posted by johan

I'm glad they did this.

I noticed when installing the blower that it came with a dual port bypass actuator, making it possible to add boost-by-gear to the blower.

I plan to add this on mine at some point so I can turn boost down at low RPM (1000-2200rpm). With the automatic transmission in my car, the sudden boost at low RPM with the 85mm pulley makes the car really jerky and there's nothing to do about it without using the bypass to force the SC to bleed off boost.

Add in a shed load of cam overlap, that would essentially do the same thing. There is enough cam movement that you should be able to do this.

[johan]

Originally Posted by Kodename47

Add in a shed load of cam overlap, that would essentially do the same thing. There is enough cam movement that you should be able to do this.

Already been down that road. Add too much and the car won't move (literally the car died on me several times when pushing the gas pedal to leave my driveway because the motor couldn't compress the air to splode it) add too little and it's bog (because of soul crushing ignition retard from having 12psi of boost at 1800rpm) then POWER (when it recovers), spinning the tires from every stop light looking like an asshat.

It's reasonably dialed in now, but I still get some gremlins when trying to drive sedately. Sometimes I'm tired and I just want to leave a stop light like a normal human being.

It'd be so much easier if I just had something statically pulling boost out at low RPM. Then the car could be tuned normally. I had a setup like this on a previously supercharged car and it was really nice.

The slushbox isn't doing me any favors here.

[86 South Africa]

Originally Posted by Rolla

@HarropOz

Does the Australian emissions tune come with any driveline warranty? Did you look at cylinder pressures like Cosworth for durability?

I'm interested in the base kit as a DD proposition.

Is the kit going to be modified for the 17+ cars?

If I lived in aus I’d do this kit without question.

[Kodename47]

Originally Posted by johan

Already been down that road. Add too much and the car won't move (literally the car died on me several times when pushing the gas pedal to leave my driveway because the motor couldn't compress the air to splode it) add too little and it's bog (because of soul crushing ignition retard from having 12psi of boost at 1800rpm) then POWER (when it recovers), spinning the tires from every stop light looking like an asshat.

It's reasonably dialed in now, but I still get some gremlins when trying to drive sedately. Sometimes I'm tired and I just want to leave a stop light like a normal human being.

It'd be so much easier if I just had something statically pulling boost out at low RPM. Then the car could be tuned normally. I had a setup like this on a previously supercharged car and it was really nice.

The slushbox isn't doing me any favors here.

You shouldn't be in boost when driving at part throttle due to the bypass valve and you only need to add the cam overlap at higher loads for when in boost and not when at cruising. The tables in the ECU are 3D so are capable of doing this. This shouldn't give any driveability issues in either circumstances, pulling away you won't be in boost.... unless you nail it away from every stop Even then you only need enough to bleed away some boost.

Either that or you could just do throttle limiting at lower RPM.

[Irace86.2.0]

Originally Posted by Kodename47

You shouldn't be in boost when driving at part throttle due to the bypass valve and you only need to add the cam overlap at higher loads for when in boost and not when at cruising. The tables in the ECU are 3D so are capable of doing this. This shouldn't give any driveability issues in either circumstances, pulling away you won't be in boost.... unless you nail it away from every stop Even then you only need enough to bleed away some boost.

Either that or you could just do throttle limiting at lower RPM.

At what throttle position does boost kick in or does not get bypassed?

[Kodename47]

Originally Posted by Irace86.2.0

At what throttle position does boost kick in or does not get bypassed?

A 3D log output of throttle vs RPM would easily show that.

On mine:

[Irace86.2.0]

Originally Posted by Kodename47

A 3D log output of throttle vs RPM would easily show that.

On mine:

Is it 1.36 bar or 19 psi including atmosphere or 5 psi of boost on the gauge, or is that 1.36 bar above atmosphere and thus 19 psi of boost on the gauge?

[Wise]

I'd be aiming for 260-270 whp with this kit. I have a Tomei UEL header and overpipe plus an Invidia frontpipe and Q300 Catback.

Would I need the 85mm to achieve this or would the 90mm be okay? I don't want to stress the engine too much as this is my daily driver (Only drive it on weekends though)