Harrop TVS86 Owners Thread

[byun]

I run the verus air oil separator with return and also venting to atmosphere. Have no issues and have run the 90,85 and 75 pulleys. Track only driving


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[robv666]

Originally Posted by grumpysnapper

I run one with my Harrop, and I think its worthwhile, as a small amount of oil does accumulate in it... (and its probably better there than running through the SC unit).

[robv666]

Does anyone know if the Grams 72mm throttle body will fit the Harrop SC?

[robv666]

Originally Posted by byun

I run the verus air oil separator with return and also venting to atmosphere. Have no issues and have run the 90,85 and 75 pulleys. Track only driving


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[Bodalenko]

Originally Posted by robv666

Thanks for the reply

How do you find the SME header?
Is it the 3” one?

Not the 3” but the same as the one used in AU 86 Series. SME supplied the series. 2.5”. You don’t need a 3” system with a Harrop.

I went from the Tomei UEL to the SME EL when I grew up and started to dislike rumble, and difference was immediate. Car ran better, AFR was far more stable, and exhaust note after 4K rpm is amazing and gets better to redline. Especially with the Harrop on the car. I have them hooked up to the SME header back twin system. It’s not perfect re drone but out of the three or four exhaust combos I’ve had it’s about the best, and at redline it’s by far the best

[Bodalenko]

Originally Posted by grumpysnapper

I run one with my Harrop, and I think its worthwhile, as a small amount of oil does accumulate in it... (and its probably better there than running through the SC unit).

Same here, the Radium twin system and I’m on e85, and after 3000k’s I’ve got a small amount of milky oil crap sitting in mine and it does smell a little of e85.

FAR better it sitting in a CC than going thru the SC in my opinion. In the scope of things a catch can is a small outlay..

[Bodalenko]

Originally Posted by Xero-Limit

You don't need to run a catch can at all. It can help keep the IC clean but isn't
"necessary".

Harrop use the air/water IC so there is no maintenance or keeping it clean. TC’s are a different beast and def need a CC.

[Irace86.2.0]

Originally Posted by Bodalenko

Harrop use the air/water IC so there is no maintenance or keeping it clean. TC’s are a different beast and def need a CC.

He was referring to oil and blowby gases getting into the supercharger and getting trapped in the heat exchangers. The Harrop kit routes the PCV to the front of the supercharger, so there will be oil there. An AOS is advised on the PCV side for this reason.

Turbos don’t create more blowby gases than superchargers. It is just that turbochargers typically hit higher boost levels, so they are needed that much more often.

This type of buildup on the heat exchangers and intake manifold would be normal.

[kg17]

I no longer have the stock intake and have the Grimmspeed one. While thinking about the Harrop SC, one could get the TRD intake which is CARB legal and use that versus the BPM filter and clean side part of the airbox included with the Harrop ? Or even any other CARB legal intake that uses the factory airbox location ?

[Irace86.2.0]

Originally Posted by kg17

I no longer have the stock intake and have the Grimmspeed one. While thinking about the Harrop SC, one could get the TRD intake which is CARB legal and use that versus the BPM filter and clean side part of the airbox included with the Harrop ? Or even any other CARB legal intake that uses the factory airbox location ?

The TRD intake won’t fit. I don’t know if there would be any gains. Edelbrock has a giant intake compared to Harrop, and are there any significant differences to be seen? In the end, the bottleneck is probably more the throttle body.

[Bodalenko]

What injectors are owners usiing with their Harrops and what are the characteristics of them?

I have the DW700cc and the stock fuel pump. My car has the 85mm pulley, making approx 10 psi, and I run e85 99.9% of the time.

I feel like the cari hits a wall from a lack of fuel at the top end when it feels like it has a shit load left in it.

I’m looking at going to the 80mm pulley, which makes approx 11.5 psi, and was thinking the 700cc might be a little light on with the extra boost so along with the necessary fuel pump upgrade I was considering installing the ID1050’s at the same time since the car will need a retune for the smaller pulley anyway.

I’ve spoken to a very knowledgeable and well clued up owner running the 80mm pulley and he thinks the bigger ID1050 aren’t necessary and will make the car less drivable at low speed due to the spray pattern of the bigger injectors. Bigger as we all know is NOT always better.

His reasoning sounds right and everyone posting here knows that mods have to be matched and balanced. Going to big in any area especially with boost v fuelling can have detrimental consequences.

Just wondering what The opinions and experiences are with the 700cc v 1050CC injector with regard to drivability when DD as well as spirited driving.

I think the 700cc is maxing out but that might be a tune issue and not the injectors.

[FR-S2GT86]

Originally Posted by Bodalenko

What injectors are owners usiing with their Harrops and what are the characteristics of them?

I have the DW700cc and the stock fuel pump. My car has the 85mm pulley, making approx 10 psi, and I run e85 99.9% of the time.

I feel like the cari hits a wall from a lack of fuel at the top end when it feels like it has a shit load left in it.

I’m looking at going to the 80mm pulley, which makes approx 11.5 psi, and was thinking the 700cc might be a little light on with the extra boost so along with the necessary fuel pump upgrade I was considering installing the ID1050’s at the same time since the car will need a retune for the smaller pulley anyway.

I’ve spoken to a very knowledgeable and well clued up owner running the 80mm pulley and he thinks the bigger ID1050 aren’t necessary and will make the car less drivable at low speed due to the spray pattern of the bigger injectors. Bigger as we all know is NOT always better.

His reasoning sounds right and everyone posting here knows that mods have to be matched and balanced. Going to big in any area especially with boost v fuelling can have detrimental consequences.

Just wondering what The opinions and experiences are with the 700cc v 1050CC injector with regard to drivability when DD as well as spirited driving.

I think the 700cc is maxing out but that might be a tune issue and not the injectors.

As I have the same modifications planned for my SC install, and have also read differences of opinions.....

Watching.

[Irace86.2.0]

Originally Posted by Bodalenko

What injectors are owners usiing with their Harrops and what are the characteristics of them?

I have the DW700cc and the stock fuel pump. My car has the 85mm pulley, making approx 10 psi, and I run e85 99.9% of the time.

I feel like the cari hits a wall from a lack of fuel at the top end when it feels like it has a shit load left in it.

I’m looking at going to the 80mm pulley, which makes approx 11.5 psi, and was thinking the 700cc might be a little light on with the extra boost so along with the necessary fuel pump upgrade I was considering installing the ID1050’s at the same time since the car will need a retune for the smaller pulley anyway.

I’ve spoken to a very knowledgeable and well clued up owner running the 80mm pulley and he thinks the bigger ID1050 aren’t necessary and will make the car less drivable at low speed due to the spray pattern of the bigger injectors. Bigger as we all know is NOT always better.

His reasoning sounds right and everyone posting here knows that mods have to be matched and balanced. Going too big in any area especially with boost v fuelling can have detrimental consequences.

Just wondering what The opinions and experiences are with the 700cc v 1050CC injector with regard to drivability when DD as well as spirited driving.

I think the 700cc is maxing out but that might be a tune issue and not the injectors.

I have the DW700s and the DW300C. I'm on E85 with a 75mm pulley at a bar of boost with an Ace150 header. No issues with fuel delivery. Just issues with oscillations in boost signals from resonance, which plays into fuel oscillations, so I wonder if that is what you mean. I would say the car pulls to redline, but sometimes it feels like it can break up at the top, as it is trying to balance fuel with the oscillations.

https://www.ft86club.com/forums/show...postcount=1004

Can you post a datalog on Datazap or something?

[Irace86.2.0]

These logs are from the 85mm pulley with the stock header. I need to transfer the logs from the 75mm pulley and upload them, but these show the oscillations.

For reference: The flat spot on the MAP is at 6272 rpms, which is where the port and direct oscillations perfectly overlap. The fuel oscillations start around 4850 then hit their high between 6000-6500 then back down until redline. Given an infinite redline, I don't know if they would smooth out again before returning to the pattern seen and repeat like that forever. The crossover point for the direct and port injectors is around 5260 for this tuner.