Harrop TVS86 Owners Thread

[Irace86.2.0]

I like the new front and rear water lines. Cleaner setup with the AN fittings.

https://www.instagram.com/reel/C0i4K...hhZWM5NmIwOQ==

[M0nk3y]

Interesting moreso on the HX Core internal.

Obviously relocating the outlet/inlet opposing means they're most likely going to a single pass HX versus prior which was dual pass (assuming...I haven't looking to my own HX to confirm).

Regardless, would certainly agree the AN Lines are slick

[Irace86.2.0]

Originally Posted by M0nk3y

Interesting moreso on the HX Core internal.

Obviously relocating the outlet/inlet opposing means they're most likely going to a single pass HX versus prior which was dual pass (assuming...I haven't looking to my own HX to confirm).

Regardless, would certainly agree the AN Lines are slick

It could be just for their track setup. I don't know the advantage or disadvantage of either setup, but I'd imagine single pass would be cooler.

[CSG Mike]

Harrop kits are back

[M0nk3y]

Originally Posted by Irace86.2.0

It could be just for their track setup. I don't know the advantage or disadvantage of either setup, but I'd imagine single pass would be cooler.

Assuming pumping flows and everything else are the same (even going into the fins per inch within the HX itself) it would result in less cooling. As well you'd have a temperature gradient across the core itself as water flows from front to rear (or vice versa).

Now with that, they could have been able to increase pumping flow across a single pass to up the capacity of the heat exchanger, or add more fins per inch (at a negative impact to airflow) to increase heat exchange effectiveness.

Or, it can be something crazy like a 3-pass system.

[Irace86.2.0]

[Tatsu333]

So if I'm not mistaken, it looks like the most substantial (only?) non-cosmetic changes are a different nose piece to accommodate the larger FA24 throttle body and the inclusion of an uprated fuel pump for the FA24 kit. The carbon air filter housing piece and the red manifold are purely cosmetic.

I can't really tell from pictures whether where the nose piece attaches to the manifold is a different shape than on the old kits, but I don't *think* so. If that's the case, I'd expect that the "new" FA20 kits are identical to the old ones, especially since any change would probably mean having to redo the CARB certification.

Still my favourite supercharger option for the twins! Glad to see they're available again.

[Kiske]

So they waited for carb cert before selling the kit this time?

[Tatsu333]

Originally Posted by Kiske

So they waited for carb cert before selling the kit this time?

No - according to the video, the CARB cert for the FA24 kit is not done yet. "For our US market, we'll be putting this through a CARB E.O. application just like the FA20 kit."

[Eaton PSI]

Does anyone know if the Harrop SC kit requires a check valve on the brake booster vacuum line?
I bought a damaged 86 with a Harrop SC on it. I pulled the SC off and transplanted it onto another car. I noticed a check valve on the brake booster hose on the damaged car but I didn't remove it and the wreck is now gone.
Do I need a check valve? The Harrop installation instructions don't mention it.

[M0nk3y]

Originally Posted by Eaton PSI

Does anyone know if the Harrop SC kit requires a check valve on the brake booster vacuum line?
I bought a damaged 86 with a Harrop SC on it. I pulled the SC off and transplanted it onto another car. I noticed a check valve on the brake booster hose on the damaged car but I didn't remove it and the wreck is now gone.
Do I need a check valve? The Harrop installation instructions don't mention it.

Yes, you'll still need that check valve on the brake booster line.

[RedReplicant]

There is one built into the OEM brake line

[M0nk3y]

Originally Posted by RedReplicant

There is one built into the OEM brake line

Harrop's Instructions are slightly unclear - I would concur. They want you to use the OE Line and add a barb'd adapter to make it reach the new SC location on the front side of the snout.

I ended up running a new line, and simply cut out the existing check valve and transplanted it within the new hose.

Much cleaner install

[mikalem]

Hello all - I ordered the tuner kit from harrop for my 2020 US BRZ and am about half way through installing when I ran into a bit of a problem - the air box doesn't seem to match up to the stock half on the dirty side (seems larger and the clips don't align) anyone else have this problem?