Harrop TVS86 Owners Thread

[johan]

Originally Posted by CxG

wait so the power on this unit is restricted by the intake which can't be larger without AC removal? Do you know what the limits are on the stock intake set up?

I wouldn't say that it is "restricted", more that the efficiency of the blower is heavily "affected" by the TB. Since it is a pull through setup (the blower has to pull air through the TB), a large amount of energy is spent by the blower drawing that air through the TB. A larger TB allows the blower to waste less energy drawing the air it desires, which increases efficiency, lowers heat, increases boost pressure and overall CFM of air at a given boost pressure.

By how much? We don't know. There aren't enough people modifying this setup yet to have that data. But it will definitely make a difference. I have extensive experience on Honda K20 motors with pull through blowers and have seen dramatic differences in power/efficiency on blowers when swapping to a large TB and intake.

Attention should also be paid to the flange area where the TB mounts, to make sure that the larger TB's inner diameter isn't wider than the inner diameter of the inlet flange. If it is, you'll need to bore it out. I'm pretty sure Harrop bored it out a bit already so a larger TB (within reason) will likely work without modification.

If I cared about making more power on this car, I would source a larger TB and have a custom 3.5" or 4" intake made for it. This would make the blower as efficient as possible. But, I don't find myself wanting for power at ~300bhp on this chassis, so I doubt I'll invest any more money in the setup. She's already too fast for the streets and is more than entertaining enough on the track.

Originally Posted by Bfranklyn86

Well, even with stock TB you can get 380whp out of it. But if the 72mm throttle body does fit then that is supposedly 48% more airflow, so it doesn't have to much bigger than stock. I think that with a larger throttle body (not sure if AC was deleted or not) harrop got around 420 wheel.

This is with a 2.1L built motor, a custom intake, deleted AC, and a tiny pulley (65mm). So it's not just as simple as a bigger TB. But I assure you, the bigger TB is a very important part of the equation.

[Irace86.2.0]

Originally Posted by johan

I wouldn't say that it is "restricted", more that the efficiency of the blower is heavily "affected" by the TB. Since it is a pull through setup (the blower has to pull air through the TB), a large amount of energy is spent by the blower drawing that air through the TB. A larger TB allows the blower to waste less energy drawing the air it desires, which increases efficiency, lowers heat, increases boost pressure and overall CFM of air at a given boost pressure.

By how much? We don't know. There aren't enough people modifying this setup yet to have that data. But it will definitely make a difference. I have extensive experience on Honda K20 motors with pull through blowers and have seen dramatic differences in power/efficiency on blowers when swapping to a large TB and intake.

Attention should also be paid to the flange area where the TB mounts, to make sure that the larger TB's inner diameter isn't wider than the inner diameter of the inlet flange. If it is, you'll need to bore it out. I'm pretty sure Harrop bored it out a bit already so a larger TB (within reason) will likely work without modification.

If I cared about making more power on this car, I would source a larger TB and have a custom 3.5" or 4" intake made for it. This would make the blower as efficient as possible. But, I don't find myself wanting for power at ~300bhp on this chassis, so I doubt I'll invest any more money in the setup. She's already too fast for the streets and is more than entertaining enough on the track.



This is with a 2.1L built motor, a custom intake, deleted AC, and a tiny pulley (65mm). So it's not just as simple as a bigger TB. But I assure you, the bigger TB is a very important part of the equation.

On E85, right?


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[Bfranklyn86]

Originally Posted by Irace86.2.0

On E85, right?


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Yeh on e85. I don't know what this kit is capable of on 93, because (in my opinion) it would need slight drop in compression, then the throttle body work, and maybe WMI. I haven't heard of anyone doing that. With either this kit or the edelbrock.

[xwd]

Originally Posted by CxG

wait so the power on this unit is restricted by the intake which can't be larger without AC removal? Do you know what the limits are on the stock intake set up?

Yeah there is a reason the TRD one went with removing the AC and a larger snout and TB (apart from not caring about retaining the AC).

[G-Unit86]

Originally Posted by Bfranklyn86

Guys, could I just take a quick poll of what oil coolers people are running with this kit, and if there have been any particular good/bad experiences with them.

I need to get one sorted for my car and would need a thermostatically controlled set up. Currently tempted by the mishimoto one.

I have a modifiied Forester Oil cooler (Water-to-Oil) most efficient heat transfer and keeps coolant and oil temps roughly around the same temp

[Irace86.2.0]

Originally Posted by G-Unit86

I have a modifiied Forester Oil cooler (Water-to-Oil) most efficient heat transfer and keeps coolant and oil temps roughly around the same temp

How did you modify it?


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[Bfranklyn86]

Originally Posted by G-Unit86

I have a modifiied Forester Oil cooler (Water-to-Oil) most efficient heat transfer and keeps coolant and oil temps roughly around the same temp

Thanks for that. Any track use with it?

[Kodename47]

Originally Posted by Bfranklyn86

Thanks for that. Any track use with it?

It's unlikely to be sufficient. It just about copes with NA use.

[Bfranklyn86]

Originally Posted by Kodename47

It's unlikely to be sufficient. It just about copes with NA use.

Yeh I think you are right. I'd already started looking more at the standard oil-air type. It's just annoying because I only need 3-5 degrees of cooling (I just do short track sessions) and I like the idea of the oil warming up faster in the winter.

What do you run with your sprintex set up?

[Kodename47]

Originally Posted by Bfranklyn86

Yeh I think you are right. I'd already started looking more at the standard oil-air type. It's just annoying because I only need 3-5 degrees of cooling (I just do short track sessions) and I like the idea of the oil warming up faster in the winter.

What do you run with your sprintex set up?

Look at what Ade runs, similar in to the Forrester one but runs a Laminova core in line that's better at getting the heat out of the oil.

https://www.merlinmotorsport.co.uk/s...-water-coolers

I don't run an oil cooler but will eventually custom make the same as Ade.

[Trefoil]

The Jackson racing dual radiator is petty spot on for cooking needs. I've been using it for a few months now without issue.

[Bfranklyn86]

Originally Posted by Trefoil

The Jackson racing dual radiator is petty spot on for cooking needs. I've been using it for a few months now without issue.

Thanks for that. I like the sound of the JR duel radiator but, reading through the thread, do you think it would be worth me ordering my own 'non-kink' lines?

Also, could you envisage any issues fitting it with a Harrop kit already installed?

The way things are going I'll be getting this fitted just in time for winter!

[Wise]

Has anyone weighed the components in the kit as well as the weight of the parts that it replaces like the stock intake pipe, engine cover plate, etc?

Interested to know how much weight the whole kit would add to the car.

[G-Unit86]

Originally Posted by Irace86.2.0

How did you modify it?


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Works sell a forester Oil to water cooler kit that fits on 86 applications see link below:

http://store.worksmotorsports.com/WO..._p/139.211.htm

To comment on it not being enough, with a stock radiator I would agree as your cooling system will be taxed with the upgrade in power. However with an updated radiator and this cooler you should be good, even for track as long as you lower your oil change intervals.