William at delicious said 20whp over the standard pulley which is 10psi/0.7Bar?

What's the minimum pulley size that's safe for 91 AKI at altitude (~4k)?

I'm from flat land, but am about to take a cross country trip.

Ok Guys...

Minimumn Pulley Size is 65mm - Requiring E85 to avoid Knock. should see 17-18PSI

Our car is running the 2.1l HKS Stroker Kit, and the 65mm Pulley, Plus some new enhancements making 315KW At The Hubs. Thats 422HP, and then to convert that to Engine HP, which you americans love.... factoring in a rough guess at 20% Drive Train loss thats 506HP at the Engine.

Hows that sound????

We run this on our Track Car, with no Issues with IAT, Please see the below chart with our track data from our MOTEC.

http://bit.ly/23aa1gY

I'd discuss this with your dyno tuner in person.

Hi Mate,

Come down and have a chat? happy to show you around and work it out with us.

@HarropOz - So what power does the harrop setup with the stroker kit and the 65mm pulley make on Ron99 rather than E85? You mention require E85 to avoid knock, but surely you can back off timing?

E85 is scarce here in the UK....

You need a pulley that produce around 11-12 PSI for european fuel. (Info from Delicious). It's more efficient that backing off timing.

If you want to run a high boost pulley you should really build your engine with a lower compression ratio. High CR builds are fine for turbo cars that run E85 since you can easily back off the boost when running the car on 91-93 fuel and run high boost on E85 making big power. With superchargers you can't change the boost on the fly so if you're not going to be running E85 all the time you have to pull a ton of timing to avoid detonation.... and if you pull too much timing your EGTs will skyrocket causing other problems. A lower CR engine should allow you to run the higher boost pressures on regular pump gas but also extract some extra power with more advanced timing when on higher ethanol content (Assuming a flex-fuel setup).

As an aside... I would really like to see some manufacturer incorporate a little CVT pulley on a supercharger kit for our cars. This would be the ultimate SC kit, in my mind. The ratio between the engine RPM and the SC RPM could be varied infinitely in real time to achieve whatever boost level you want (within reason, of course). Want to hold 10PSI from 2000 RPM to redline? Just adjust the CVT as revs change to maintain that pressure. Want to increase boost when running E85? No problem. This technology is just hitting the market http://www.fallbrooktech.com/accesso...s/supercharger
That company developed a clever CVT design for bicycles several years ago and has recently beefed up the design for use with superchargers.

I would be targeting a 85mm Pulley for that build. The 12.5:1 Compression ratio standard isnt kind to lesser octane fuels.

I cant recall anyone building a Low CR Stroker kit and not running E85 or running it on standard pump 98/99RON Fuel.

You'd be in uncharted territory for our kit i believe...

What CR is your built motor? Do your temperatures start to rise after 20-25 mins of hard track time or do they stay at the temps shown in the graph?

That graph is lap 7 i believe in 10 lap stint At Phillip Island, they are stable. Temps do not rise.

Obviously Maintaining the engine cooling system is a priority.

Compression ratio is 11.2:1 in our car.

There is an Edelbrock (TVS1320) kit on a built motor/small pulley that can make 284whp on pump gas. Thats using stock compression ratios.

So it can be done but seems you don't get much extra power from the extra boost.

Our fuel is a bit better than pump gas though so maybe ~310 wheel HP is possible.

Matt@cosworth has said on one of the UK forums that he thought around 11:1 compression would be right for their set up on a built motor.... so maybe dropping the CR slightly is the way forward to avoid knock with non-e85 fuels.

People who go FI here at the California Tracks struggle with coolant and oil temps when going FI especially in the summer (I was one of them). I am guessing your super low coolant/oil temps are mainly due to the V-mount oil cooler setup that doesn't block much of the radiator. Did you delete the stock crash support beam and A/C condenser?

True for stock motor

Forged internals with lower CR should allow for more boost I believe.

Guys I need your inputs to help me decide... Im torn between HKS v3 or Harrop... I like both but have to choose one as I plan to go FI Feb 2017.
I just need to know if I can hook up AEM water/meth injection kit to Harrop kit??? I ckecked every photo online and cant see a place/port to fit the AEM injector?? Any of you have Harrop kit can confirm??
Other wise I'd go to HKS v3.

Resons is octane rate in my country is only 90 :(

Guys I need your inputs to help me decide... Im torn between HKS v3 or Harrop... I like both but have to choose one as I plan to go FI Feb 2017.
I just need to know if I can hook up AEM water/meth injection kit to Harrop kit??? I ckecked every photo online and cant see a place/port to fit the AEM injector?? Any of you have Harrop kit can confirm??
Other wise I'd go to HKS v3.

Resons is octane rate in my country is only 90 :(

Yes the oil cooler does help keep things in check, and we thoroughly recommend the use of any oil cooler for track work. Ours works very well diverting hot air away from the engine bay and Inter cooler/radiator heat exchange cores.

the car currently has working AC.... not much of a track car i know... but its there, not removed. Neither is the crash beam.

http://blog.perrinperformance.com/tag/harrop/

Have a look at this setup with Water/Meth Injection on a FA20 powered WRX

Wow thats a brutal build @_@ nice
And its great it was post tvs roots, but I was woundering... if I drill holes in the runners wont that void my supercharger warranty?? Also for the long run it wont cause metal to cracks due to thermal stress (heat during duty and cooldown when the car off) I mean in case the drilling was not done in a proper way?

What i was thinking is to make wmi pre oem throttle by using throttle spacer and drill a hole into it for the wmi.
But that wrx is really more effective to remove heat

It totally will void the SC warranty. I don't know about how the manifold was cast, but it seems solid and well designed. I think Perrin took the cost of brand new units for the project as a proof of concept build. Best of both worlds when you can twin charge a car with limited displacement. The Lotus and MR2 groups have done it for a while, but at great cost since they require built engines (and in some cases, transmissions/axles).

Absolutley.

A tune from Harrop for non-US fuels would still be useful as a starting point for MAF scaling and cam angles. The MAF scaling is particularly important since the kit replaces the MAF housing.

@HarropOz is there a way for end users to get a base cal from you for ECUTek? Knowing that it won't be usable out of the box, but still important as inspiration for a tune.

I ordered my kit from Neal on the 19th, and waiting patiently for delivery (honestly, I am), but trying to work out the details regarding tune. I will be doing install myself, my 2017 BRZ is already tuned on ECUTek, and I will need to be able to fire the car up and drive it for a couple hours to get to my buddies dyno so we can properly tune it.

Having something to go off of for the MAF will be paramount to the success of my install. Cruising down the freeway for two hours in limp mode is unappealing.

They already have a US spec tune. It's just with CARB getting tested. Doubt they will release it before everthing gets approved, and they might not release theirs like Edelbrock did. With that said, could the Edlebrock tune work as a get-you-down-the-road tune?

Thanks. Kyle actually mentioned the same thing in his build thread - about using the Edelbrock tune. I guess I'll see how things play out. Even if Harrop isn't willing to release the tune - if I can just get the correct MAF calibration, that would be amazing.

Just run the tune in closed loop until you get to the dyno. Will be fine to drive and won't take long to get the MAF right on the dyno. If in doubt, just bump the stock scale up a bit to be on the safe side. Log the trims a bit at idle and see where it's sitting.

Be interesting to see a MY17 FI tune, the WOT fueling control is different to previous ROMs.

Yes, the fueling is different - it threw us off at first when we started tuning my car. It's more Toyota-esque and less Subaru-esque.

Just saw your email. I've already worked with Delicious to create a Harrop specific tune. I'll talk to Zach and see if we can get you a start up map. :thumbup:

Awesome thanks!

It's a 2017 Automatic

Is that a pro or con?

Let me get back to you on that one Johan, perhaps flick us an email at sales@harrop.com.au

Email sent, thanks for the response.

It can be done. With ease. :-)

-Zach
Delicious Tuning

Thanks for that info @HarropOz

Could you elaborate on how you took the power output from 364whp (e85) when you initially put the stroker kit in, to to the 422whp quoted here. That's a pretty sizeable increase for a few tweaks!

I'm also interested to know what proportion of your customers go for the smaller 85mm pulley on stock internals and 98oct. Is it a rarity, or fairly common?

Many thanks.

Any CARB updates?


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Hi guys i'm looking to buy a SC this spring for my BRZ and I've narrowed it down to an Bedrock or Harrop. I really like the packaging of the Harrop, and leaning that way, but i have 2 questions.

1st: @HarropOz, looking at your tack data do you know what you ROA was, and how does that compare to a stock pulley setup?


2nd;
Also has any one ran this kit with an aftermarket CAI, I currently have a Perrin Intake on my car, so I no longer have the stock air box in the car. I would have to dig it out of my parents basement back in Canada. I'm currently living in Michigan so not to much of a heart ache.

Thanks

re: intake

I've wondered the same myself, eyeballing it from pictures - it looks like there's a -slight- possibility you could make it work if you modified a silicone coupler to fit.

Also curious on the intake.

-Carlos

Add me to the list. Lovin it.

'17 BRZ Limited Auto. Tuned by @VitViper

Don't have numbers yet. Just doing an eTune for now. Looking into a higher boost pulley, might do a custom intake to reduce MAF turbulence, add a 4-bar map sensor and then put it on the dyno to see what she can do.

Lookin good there. You're added! Welcome to the club :clap:

Cannot recommend Harrop's OEM quality like form factor along with Moto East's tuning enough. People honestly believe the car is stock when the hood is left open at shows, except for the "SUPERCHARGED" written across both IC. On the road and track people are still amazed at the performance.

I'm about to leave my current state, but freaking love this SC, particularly on Moto-East's flexfuel tune. I've surprised lots of people on my setup and they always want to talk builds afterwards.