Official Harrop TVS1740 Supercharger Thread

My Harrop install is being finished today/tomorrow, just doing some maintenance items! Can't wait to take it for a rip!

Will post my thoughts on it afterwards

Some thoughts on the Harrop, on my first/second drive:

Note: I have NOT gone WOT, or flogged the car hard yet. There's been too much traffic since I picked up the car, will give the beans tonight.

I typically like to judge something based on how well it drives, when you want to be subtle, rather than how well it drives when you go WOT on it.

I can say, so far, the BPMSport tune by Mike Benvo on the Harrop, makes it drive essentially like stock. There's just more power everywhere in the powerband, but, if I drive it in D Mode, putting around town, it feels literally as it did stock.

The whine, it's loud. I personally don't mind it, but, anything over 2,000RPM, the whine is pretty loud. It's not for everybody, but, I paid for a S/C, I'm ecstatic to hear S/C noises, lol.

Will chime back in when I get more mileage on the S/C!

becausephilchow wrote

Some thoughts on the Harrop, on my first/second drive:

Note: I have NOT gone WOT, or flogged the car hard yet. There's been too much traffic since I picked up the car, will give the beans tonight.

I typically like to judge something based on how well it drives, when you want to be subtle, rather than how well it drives when you go WOT on it.

I can say, so far, the BPMSport tune by Mike Benvo on the Harrop, makes it drive essentially like stock. There's just more power everywhere in the powerband, but, if I drive it in D Mode, putting around town, it feels literally as it did stock.

The whine, it's loud. I personally don't mind it, but, anything over 2,000RPM, the whine is pretty loud. It's not for everybody, but, I paid for a S/C, I'm ecstatic to hear S/C noises, lol.

Will chime back in when I get more mileage on the S/C!

Close the hood vent.

becausephilchow wrote

Some thoughts on the Harrop, on my first/second drive:

Note: I have NOT gone WOT, or flogged the car hard yet. There's been too much traffic since I picked up the car, will give the beans tonight.

I typically like to judge something based on how well it drives, when you want to be subtle, rather than how well it drives when you go WOT on it.

I can say, so far, the BPMSport tune by Mike Benvo on the Harrop, makes it drive essentially like stock. There's just more power everywhere in the powerband, but, if I drive it in D Mode, putting around town, it feels literally as it did stock.

The whine, it's loud. I personally don't mind it, but, anything over 2,000RPM, the whine is pretty loud. It's not for everybody, but, I paid for a S/C, I'm ecstatic to hear S/C noises, lol.

Will chime back in when I get more mileage on the S/C!

It's hard to tell on the street because this set up is so smooth with his tune, it is made for complete drive ability! I think once you open it up at speed while rolling, it will knock your socks off! Thanks for sharing!

L4ces wrote

Close the hood vent.

Truthfully, doesn't bother me. So far, been driving it with the wife in the car, and she hasn't noticed anything out of the ordinary yet. She doesn't know there's a S/C in the car .

GP0256 wrote

It's hard to tell on the street because this set up is so smooth with his tune, it is made for complete drive ability! I think once you open it up at speed while rolling, it will knock your socks off! Thanks for sharing!

Yessir. It's so very smooth, and I love it. Gave it the beans last night, and, it simply just keeps on pulling and pulling. It feels so smooth, it's just like stock, but, there's just gobs more power everywhere.

Some more thoughts:

The car takes quite a bit of time longer to get to full operating temperature now (needle at the middle of the gauge).

I'm assuming that's because the new cooling system is just significantly better, but, I'm quite impressed with it still, everything feels great!

becausephilchow wrote

Some more thoughts:

The car takes quite a bit of time longer to get to full operating temperature now (needle at the middle of the gauge).

I'm assuming that's because the new cooling system is just significantly better, but, I'm quite impressed with it still, everything feels great!

I didn't realise there was a change to the cooling system ? I know the intercoolers may make the air cooler when not pushing the car so maybe that is having a cooling effect ?

I also find that mine takes a bit to warm up!

becausephilchow wrote

L4ces wrote

Close the hood vent.

Truthfully, doesn't bother me. So far, been driving it with the wife in the car, and she hasn't noticed anything out of the ordinary yet. She doesn't know there's a S/C in the car .

GP0256 wrote

It's hard to tell on the street because this set up is so smooth with his tune, it is made for complete drive ability! I think once you open it up at speed while rolling, it will knock your socks off! Thanks for sharing!

Yessir. It's so very smooth, and I love it. Gave it the beans last night, and, it simply just keeps on pulling and pulling. It feels so smooth, it's just like stock, but, there's just gobs more power everywhere.

becausephilchow wrote

L4ces wrote

Close the hood vent.

Truthfully, doesn't bother me. So far, been driving it with the wife in the car, and she hasn't noticed anything out of the ordinary yet. She doesn't know there's a S/C in the car .

Exhaust super loud? What setup do you have on it?

XIX wrote

I didn't realise there was a change to the cooling system ? I know the intercoolers may make the air cooler when not pushing the car so maybe that is having a cooling effect ?

I also find that mine takes a bit to warm up!

Yup, I assume that's it too. Not a bad thing at all though, I'm happy for the car running cooler.

L4ces wrote

becausephilchow wrote

Truthfully, doesn't bother me. So far, been driving it with the wife in the car, and she hasn't noticed anything out of the ordinary yet. She doesn't know there's a S/C in the car .

Exhaust super loud? What setup do you have on it?

I have a Akrapovic Evo. I don't notice a change in the tone/volume of the exhaust honestly. Feels/sounds about the same as without the S/C.

I find the exhaust more on the quiet side, a bit bassy on the lower RPMs, but not loud.

becausephilchow wrote

L4ces wrote

becausephilchow wrote

Truthfully, doesn't bother me. So far, been driving it with the wife in the car, and she hasn't noticed anything out of the ordinary yet. She doesn't know there's a S/C in the car .

Exhaust super loud? What setup do you have on it?

I have a Akrapovic Evo. I don't notice a change in the tone/volume of the exhaust honestly. Feels/sounds about the same as without the S/C.

I find the exhaust more on the quiet side, a bit bassy on the lower RPMs, but not loud.

becausephilchow wrote

L4ces wrote

Close the hood vent.

Truthfully, doesn't bother me. So far, been driving it with the wife in the car, and she hasn't noticed anything out of the ordinary yet. She doesn't know there's a S/C in the car .

GP0256 wrote

It's hard to tell on the street because this set up is so smooth with his tune, it is made for complete drive ability! I think once you open it up at speed while rolling, it will knock your socks off! Thanks for sharing!

Yessir. It's so very smooth, and I love it. Gave it the beans last night, and, it simply just keeps on pulling and pulling. It feels so smooth, it's just like stock, but, there's just gobs more power everywhere.

Awesome. Enjoy your new power!

becausephilchow wrote

Yup, I assume that's it too. Not a bad thing at all though, I'm happy for the car running cooler.

I don't think it runs cooler, it will take longer to warm up.

I think once at operating temperature and being driven, the boost would offset the cooling effect of the intercoolers and so there would be negligible difference.

XIX wrote

I don't think it runs cooler, it will take longer to warm up.

I think once at operating temperature and being driven, the boost would offset the cooling effect of the intercoolers and so there would be negligible difference.

Taking longer to warm up = running cooler technically? Or, that makes sense to me at least

But yes, once you start beating on it, probably a negligible difference.

becausephilchow wrote

Taking longer to warm up = running cooler technically? Or, that makes sense to me at least

But yes, once you start beating on it, probably a negligible difference.

Hahah, unfortunately it just means its taking longer to warm up, which is probably not a good thing 😭

If you are not pushing it, it will prob run a bit cooler. But lets be honest, once the car is warmed up, that will be practically never!! 😆

Glad you guys are enjoying the blower. Warmup time should be pretty much unaffected by the blower. The intercoolers and heat exchanger are on a separate circuit for keeping the intake air temperature down only. They won't affect oil or coolant temps.

Anyone notice that if your applying maybe 50-60% throttle from the lower rpm ranges in lower gears its not very smooth alot of times. Mostly notice it when am trying to get out of a parking lot onto a busy highway quickly and the car would jerk as if power is coming on and off but not violently. My M is DCT.

Its sorta feels like the electronic bypass valve is closing and opening alot due to not applying the throttle super consistently so the engine is getting boost 1 second and not the next.

eternallx wrote

Anyone notice that if your applying maybe 50-60% throttle from the lower rpm ranges in lower gears its not very smooth alot of times. Mostly notice it when am trying to get out of a parking lot onto a busy highway quickly and the car would jerk as if power is coming on and off but not violently. My M is DCT.

Its sorta feels like the electronic bypass valve is closing and opening alot due to not applying the throttle super consistently so the engine is getting boost 1 second and not the next.

This is the fueling going rich in case you slam your foot to the floor, and then leaning back out once it doesn't see full boost pressure. Will be ironed out in future revisions - we are doing some testing with different pressure sensors.

Need to update thread on progress with injectors and E85 - will chime in as soon as I can - but essentially I am having them flow tested to make sure the injector dead time/latency calculations are 100% spot on.

Mike Benvo wrote

This is the fueling going rich in case you slam your foot to the floor, and then leaning back out once it doesn't see full boost pressure. Will be ironed out in future revisions - we are doing some testing with different pressure sensors.

Need to update thread on progress with injectors and E85 - will chime in as soon as I can - but essentially I am having them flow tested to make sure the injector dead time/latency calculations are 100% spot on.

Thanks for the quick insight Mike
Hope a fix for that comes soon as well as the E85 tune as it seems like that is much more likely than Stage 2 lol

eternallx wrote

Anyone notice that if your applying maybe 50-60% throttle from the lower rpm ranges in lower gears its not very smooth alot of times. Mostly notice it when am trying to get out of a parking lot onto a busy highway quickly and the car would jerk as if power is coming on and off but not violently. My M is DCT.

Its sorta feels like the electronic bypass valve is closing and opening alot due to not applying the throttle super consistently so the engine is getting boost 1 second and not the next.

I actually felt this! Didn't think too much of it, but, glad to see it's being ironed out in future revisions!

Mike Benvo wrote

This is the fueling going rich in case you slam your foot to the floor, and then leaning back out once it doesn't see full boost pressure. Will be ironed out in future revisions - we are doing some testing with different pressure sensors.

Need to update thread on progress with injectors and E85 - will chime in as soon as I can - but essentially I am having them flow tested to make sure the injector dead time/latency calculations are 100% spot on.

Perfect!

Mike Benvo wrote

This is the fueling going rich in case you slam your foot to the floor, and then leaning back out once it doesn't see full boost pressure. Will be ironed out in future revisions - we are doing some testing with different pressure sensors.

Need to update thread on progress with injectors and E85 - will chime in as soon as I can - but essentially I am having them flow tested to make sure the injector dead time/latency calculations are 100% spot on.

Are the injectors from Injector Dynamics? I've used ID1000 on my 2009 CTS-V with great success after a set of 950cc from DeatschWerks. The DeatschWerks injectors were flow matched, but that's only at full flow and they produced a rough idle and rough transient response. The ID1000s had a smooth as stock idle and transient response due to the flow match across the flow range and latency matching.

burnrbr wrote

Are the injectors from Injector Dynamics? I've used ID1000 on my 2009 CTS-V with great success after a set of 950cc from DeatschWerks. The DeatschWerks injectors were flow matched, but that's only at full flow and they produced a rough idle and rough transient response. The ID1000s had a smooth as stock idle and transient response due to the flow match across the flow range and latency matching.

I believe they just use OEM M5 injectors for the Harrop which work just like the factory m3 ones from a daily driving standpoint, but allow the extra flow of fuel when you go WOT.

Mvy wrote

I believe they just use OEM M5 injectors for the Harrop which work just like the factory m3 ones from a daily driving standpoint, but allow the extra flow of fuel when you go WOT.

Mike is running 68lb injectors which are not what comes on the m5. that is what is being referenced here.