Litchfield supercharger
 

They have a video on their facebook, kinda busy right now but wanted to post this. Rotrex FTW

Thanks to @Visconti for the link of FB also.

Oooh even more options :) I like the sound of a Rotrex unit too, any pics?

Edit: found a link to the video
http://www.facebook.com/photo.php?v=532206483475987

A bit of a dirty looking setup... maybe just the prototype.

Details? PSI supporting mods etc

mmmm Rotrex C30 I'm guessing?

Side comment: Rotrex needs to put electric clutches on the rest of their lineup, not just the miniscule C8T that no one cares about.

DAYYUMMMMMMM!:popcorn:

Litchfield. British. So is that flywheel HP or RWHP?

damn the torque to HP ratio sucks.
I care more for torque than HP. very nice but this isn't for me.

Gained more hp and tq than most stage 1 turbo applications so far, and shows about the same hp/tq ratio (gain ratio?).

Are you expecting 275/275?

I'm hoping the Innovate gets more torque, it won't have more tq than hp but is probably our closest chance at even numbers.

I want one!

Why start the plot at 3000 RPM?

Looks like that's where the numbers started changing

I find it suspicious; I wonder if they're making less power down-low. It's impossible to tell due to the color scheme, but it looks like the stock car might be making a hair more power at 3000 RPM and I'd like to see if that trend continues farther down.

Possible but Litchfield is very highly respected, especially in the GT-R world. I don't think they would hide it intentionally if that is the case.

It is possible that they are making lower numbers at low RPM's due to the new intake manifold design with longer runners. Just my .02

The sampling rate of the dyno combined with the response time of the engine, always makes for a ramp at the first ~200 rpm of a dyno pull.

The stock pull was likely started at a lower RPM.

I agree with many of you though. dyno operators should definitely start their pulls at 2000 or 2500, so the low end is shown completely.

It makes makes more power throughout the rev range :)
I'll try and get another graph up on our blog over the weekend. This is on quite a conservative tune so I expect the torque figures to increase low down as there's ign timing available.
Iain Litchfield

Happy to beta test this one

I agree. Full dynos are key in evaluating this. 0 to 4000 rpm are much more important than 4000-7600 on a daily driver.

Me too, i would love to know what ballpark pricing is, plus or minus $4500?

Hi...did you know that horsepower is a funcion of torque and rpm? The horsepower and torque is ALWAYS equal at 5252rpm. Therefore, if you want torque to be equal (ie 250, 250), then just set your redline to 5252rpm. If you want performance, on the other hand, then you need to start getting a better grip on what horsepower and torque numbers really mean.

When I see equal peak torque and horsepower on an engine redlining at a higher rpm than 5252, then I KNOW that torque is falling off as the revs climb...that is worse for performance in my opinion. What you really want is a flat (or close to flat) torque curve for as many rpm as possible leading up to redline. That is area under the curve and is good for performance.

Just remember, that peak numbers don't tell the whole story and that you need to look at the curve to understand what is going on and how that relates to what you will be doing with the car.

Looking pretty good. Which Rotrex are you guys using? What is the boost and impeller speed if I may ask?

Definitely looks like the C30 series as the rear is as big as the SC body.

I do like the set up with the reverse mount but the pipes definitely can be made better for a better look.
The tensioner belt to the right is the cause for the inlet pipe to be high to clear it.

Need to look if the SC can be lowered and a smaller tensioner pulley can be installed.

Also i would opt for a larger SC as its only 1 cm bigger.

I would make a better entry and keep the OEM air box or possibly use this tight silicon coupler for a cleaner look

http://img607.imageshack.us/img607/5384/eric11.png

LOL at people expecting BIG TORQUE from a
A. high rev'ing free flowing 4 cyl motor
B. centri supercharger

Like it has been said already. Get a grip on what TQ and HP actually mean. When you have a much higher HP # than TQ that means your engine is a performance engine. You are generating good torque at high RPMS.

A torque monster on the other hand generates good torque at low rpms (means nothing for high performance driving) and then it sputters out at high rpms (bad). Only good for put put'ing around town. Terrible for the track or any high speed high performance driving.

Have you ever seen a car dynoed in person?

No, but I've seen dyno charts that start at lower RPMs.

Asked them on facebook what the car had besides the kit and they said "The car has our Milltek exhaust system with standard headers and fuel system."

When they operate the dyno, there is a set interval they start the reading at. That interval is usually around 3k rpms. The person inside the car runs it up to 3k rpms in said gear, and then they hit the switch and then start the pull. This is how they take their reading. Even if you seen a chart start below that, they don't do a dyno pull from idle. Possibly you saw a chart that was showing the view of power over mph. But you won't ever see a dyno pull starting at idle. Think about it, it's not possible if all cars are usually dynoed in 4th gear if it's a 5 speed or 5th gear sometimes if it's a 6spd (whichever gear is closest to 1:1). You don't accelerate from a stop light in 4th gear.

^ that but my tuner generally starts at 2,200

What he said.. I love Rotrex units. Exactly what I'm after if I don't stay NA.

Article talking about the new supercharger kit
http://www.gtspirit.com/2012/12/01/l...6-brz-or-fr-s/

I sent in the preorder form hoping to get pricing soon.

when i am trying to make power, I dump the clutch at 3500-4000rpms, every shift there after is north of 2200rpms. no value to make power that low on a motor this small. I see soem turbo kits advertising tq/power peaks in the 3000 rpm range, what do you at 6000? It makes sense to tune for 3000rpms and north, and chart accordingly

Just going to bump this one for comparison to the other numbers we are seeing.

The power output is great. But the design leaves way too much on the table.

I don't want to sound brash, but from what I can see the whp output is the only thing that kit has going for it. It needs some redesigning.

I just dont see 2000 rpms as a usable range; when I want power, its never that i put my foot down and expect to go at 2800rpms. I always shift, and want my power curve to start at 3400ish, and pull me up to 7k

I am at a total loss on folks wanting power down low. I have an audi S4, V8, the torque at 2600 is at peak, and yeah, it will hurt your neck if I floor it. there is nothing at redline tho..

you will never get that out of a 2.0L four banger.
The audi is a quad cam v8 with 4.2L of gas guzzling power

I notice even around town, I tend to shift at 3000-4000RPMs (1-3 at 3500-4000, and 4-6 closer to 3000)

I don't see the point of having it start low when driving around town its really not needed.

A lot of modern turbocharged engines are producing peak torque by 2000 rpm. The Ford EcoBoost 2.0 is one such example.

Picture: http://superchipsltd.files.wordpress...03-ps-copy.jpg

Going to talk to Iain (Litchfield) tomorrow and a few of us UK and European 86 bods will be seeing the SC car at the UK Autosport Show, Saturday week.

I expect the final map and engineering to be different from that shown to date.

Forge have done a top job on the pipes, I'm told

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