Review for Harrop SC

[Shredicus]

Originally Posted by pbonsalb

The two cars looked pretty close in the video. Surprising given the supposed power difference.

Even more surprising still, given that a centri is known for its linear top end pull, yet the midrange monster harrop is keeping right up at these speeds.

[Pro-AM3]

Originally Posted by 8600RPM

Beautiful linear power graph! How is heat soak on these kits?

Its robbing about 35-45hp after 5k rpms. You will need an ice tank or methanol to really make decent HP

[Sered]

It's power under the curve or average power. At low speeds, even on the DCT; the car falls out of the peaky powerband of the centri S65. There's ways to mitigate this on centri kits but no one has done it yet. Involves running small pullies and a wastegate to limit the air going into the manifold.

The Harrop makes as much average power here (or at least really close) because the car isn't falling out of the powerband (it, in effect, is wider).

Again, apples to apples, the car that makes the most average power over the run of acceleration event will win.

[Pro-AM3]

Originally Posted by Sered

It's power under the curve or average power. At low speeds, even on the DCT; the car falls out of the peaky powerband of the centri S65. There's ways to mitigate this on centri kits but no one has done it yet. Involves running small pullies and a wastegate to limit the air going into the manifold.

The Harrop makes as much average power here (or at least really close) because the car isn't falling out of the powerband (it, in effect, is wider).

Again, apples to apples, the car that makes the most average power over the run of acceleration event will win.

But at what rpm does a centri overtake the harrop. Im betting well before the rpm at the shift drop/points.

Harrop seems like a great option if you dont actually use the car above 5k, as in rarely or never race.

Of course, you could always get the same low acceleration that the harrop is providing, by doing a differential change, that gives you the acceleration of more tq, but you keep the HP

We can more accurately compare the 2 once they send drf files to the database so we can overlay them with the rest.

[C|3R1C]

Originally Posted by BossManE90

Ever get a chance to measure for us?

Yea I need to find a ruler...turns out i dont own one lol

[Beedub]

very surprised by that video!! GO harrop!!! impressed!!

[regular guy]

Sorry this took so long...been real busy. Here's the comparison I promised.

Here's the area-under-curve graphs, and the CarTest estimates for ESS @ 511whp vs. Harrop TVS. The closest I had for ESS was 490 or 511. You guys wanted 500, so I shot over to 511 instead of down to 490. The CarTest results are using the actual WHP dyno charts input into CarTest for analysis.

[Sales@Alekshop]

Originally Posted by regular guy

Sorry this took so long...been real busy. Here's the comparison I promised.

Here's the area-under-curve graphs, and the CarTest estimates for ESS @ 511whp vs. Harrop TVS. The closest I had for ESS was 490 or 511. You guys wanted 500, so I shot over to 511 instead of down to 490. The CarTest results are using the actual WHP dyno charts input into CarTest for analysis.

Is that a VT1 dyno RG? That looks like VT1 power. Most VT2 cars make around 550 whp. You should do the same graph with a standard VT2 car making 530-560 whp.

[regular guy]

Originally Posted by Sales@Alekshop

Is that a VT1 dyno RG? That looks like VT1 power. Most VT2 cars make around 550 whp. You should do the same graph with a standard VT2 car making 530-560 whp.

I posted a bunch more comparisons between the Harrop and other kits in the main Harrop thread. This particular comparison came from m33 on his first kit. I was asked to compare to about 500 whp, and that was the closest I could find.

http://www.s65dynos.com/showDyno.php?recID=278

[C|3R1C]

Originally Posted by regular guy

I posted a bunch more comparisons between the Harrop and other kits in the main Harrop thread. This particular comparison came from m33 on his first kit. I was asked to compare to about 500 whp, and that was the closest I could find.

http://www.s65dynos.com/showDyno.php?recID=278

Thanks for setting that up regular guy!

[DavidZ]

Did you change your rod bearings at any point?

[C|3R1C]

Originally Posted by DavidZ

Did you change your rod bearings at any point?

Yes like 4k miles before I actually put on the kit. Though the amount of miles is irrelevant nor did I choose it. It was simply the time between getting the bearings and installing. I went with wpc treated and was installed them along with diff and subframe bushings