Kraftwerks Supercharger Owners Thread

[KraftWerks]

Originally Posted by SPCorBUST

If I'm reading that correctly, I think it confirms what I was saying about power across the board being higher with the C38. If not, they would cross somewhere. I'm pretty sure that with the high boost pulley and e85 the differences would be even higher.

Oh most definitely.
Something to note is that with the base set of pulleys, we're not winging the C38 out at all.

As a base, the C30 is spec'd to rev up to 7800; The C38 with the same pulley can rev to 8900. Dropping the C38 down to meet the engine limit of the FA would.... well increase the boost significantly.

[Sellout]

As I said, if they were at the SAME horsepower level, the powerband of the smaller unit would be better. You can see in that graph that the boost curve of the smaller unit is more linear. I also said it would be a small difference, but that it would be a difference. On my monitor there's 2mm between the boost curves at 2000rpm, and 5mm between them at >7000rpm. The pink curve is pulling away from the blue one as RPM goes up. THIS IS EXACTLY WHAT I'M TALKING ABOUT.

Show me a C30 and a C38 both at 300whp on E85 and I would bet money that the C38 will have slightly more area under the curve, all else being equal.

[SPCorBUST]

Lets take the 275hp mark, since neither kit hits 300hp on the graph. At that mark, how is a C30 making power 1k rpm later, being consistently below the C38, and lower peak hp number a better powerband...?

If your sticking point is that the C30 is more linear which seems negligible at best, you could likely account for those fluctuations with differences between the tunes themselves.

Originally Posted by Sellout

The pink curve is pulling away from the blue one as RPM goes up. THIS IS EXACTLY WHAT I'M TALKING ABOUT.

If thats what you meant, then I already said that earlier in the thread:

Originally Posted by SPCorBUST

widening the distance between the two the higher you go in rpms

[SPCorBUST]

Which is to say that at least in that last regard, I think we're saying the exact same thing.

[Chad86]

Originally Posted by DAN_BRZ

add me to the owners list, just purchased my kit from @rickspecd
awesome guy to deal with. if anyone is looking for a good deal on this kit i suggest contacting him... now come on nicer weather!!!!!!!

I was offered partial sponsorship, just trying to figure out how this will affect my warranty and engine reliability down the road. Input appreciated guys...
I am planning on going C38 as I would like to aim above 300 whp and it seems from what I have read above there are no issues being slower than the C30, if I read this correct. Any issues running 93/94 octane on the C38? I am unable to get E85 in Canada, so I will be running 94 octane.

[Triumphrider]

Hey Chad I purchased the same deal from rickspecd. I'm going with moto East 91 octane tune. They will read my logs and make corrections. I will probably always run 94 in it but I need to be tuned for 91 in case I can't find 94. Moto East tunes have been recommended to me by so many people. Can't wait to try it!

[Dream20b]

a belt driven supercharger doesn't have the lag of a turbo setup, so its basically the same powerband length, just a slightly stronger growth rate.

[Sellout]

Originally Posted by SPCorBUST

Lets take the 275hp mark, since neither kit hits 300hp on the graph. At that mark, how is a C30 making power 1k rpm later, being consistently below the C38, and lower peak hp number a better powerband...?

You're trying to compare curves that have two different power peaks. I'm talking about what happens when they both peak at the same number, because this entire discussion is about a car that makes 300whp on E85. A number that you can hit easily on the C30.

Move the C38 boost curve OR the power curve down so it's matching the C30 at peak. Copy it EXACTLY, but move it down a few mm so that both superchargers are hitting the same peak number. What do you have now? THAT'S what I'm talking about. If they both peak at the same power number OR the same boost number, the C30 has more area under the curve.

[Triumphrider]

Just curious more than anything...I see in the first couple pages that people have to disassemble the blower and rotate it to get the right angle on the mounting plate. Is this still the case? or do they now come ready to mount? Mine is still packed away til spring, once the snow starts leaving I'll be more motivated to start playing with it.

[Freeman]

Originally Posted by Triumphrider

Just curious more than anything...I see in the first couple pages that people have to disassemble the blower and rotate it to get the right angle on the mounting plate. Is this still the case? or do they now come ready to mount? Mine is still packed away til spring, once the snow starts leaving I'll be more motivated to start playing with it.

Not the case.

[SPCorBUST]

Originally Posted by Sellout

You're trying to compare curves that have two different power peaks. I'm talking about what happens when they both peak at the same number, because this entire discussion is about a car that makes 300whp on E85. A number that you can hit easily on the C30.

Move the C38 boost curve OR the power curve down so it's matching the C30 at peak. Copy it EXACTLY, but move it down a few mm so that both superchargers are hitting the same peak number. What do you have now? THAT'S what I'm talking about. If they both peak at the same power number OR the same boost number, the C30 has more area under the curve.

thats honestly the most baffling comparison. not sure why you would want to do that.

you might however want to see these start at the same place to see what additional hp is being made and how much sooner. the dyno already roughly does this and better yet tells us the real story, but just for hypothetical purposes, if we advance the C30's graph by roughly 100rpm, so that they both start at 50hp, you can see that there are marginal gains from the C38 up until about 5600rpm, when it starts to increase the gap and hits 275hp roughly 600rpm sooner. in general a nice point as well is that it looks like the C30 might have some difficulty getting to (and maybe very far past) that 300hp goal anyway. moving past it not being relevant to the goal, but getting to it, yes, very pertinent.

seems like the bottom line is being able to make his 300hp goal easier, earlier and faster on a C38, with more left on the table if he gets the power bug.

[Triumphrider]

@KraftWerks I know I need to use a crank pulley holder to get the crank pulley bolt out, but how did you hold it to torque it back up? With the cogged drive gear on there you can't fit the holder into the pulley?

[Chad86]

Originally Posted by post_break

I don't like their belt setup. And I got the kraftwerks kit at a discount.

Originally Posted by fteightysix

I have a Auto, with over 400hp it spins in 1st.. in fact its useless lol, it spins in second around 4k-4500, in 3rd around 5-6k and depending on the road here in Vegas it will spin 4th above 7k. this is with the 245 toyo proxes 1, not the best tire but still suppose to be a good one, my next set up will be 265 Michelin PSS, i hear they are sticky and have decent mileage. Im also going to get some camber taken out of the back to put more rubber on the road.

until then

I cant imagine what 500+ turbo cars do.. people say this is how the car shouldve come and i disagree. People are putting them in ditches and curbs with 160 hp at the wheel, they dont need 300+ lol. A great tuner here in the 86 world, said 250hp at the wheels is perfect for this car, 300hp is the limit, anything more is just a "manhood" measuring contest. and as much as i spin the tires, and hunt for traction i kinda believe him..

-Thomas

So with this in mind, is it better to go with the C30? I read in a more recent post that with running the C38 you will have to dump a lot of money into the car to keep up with everything.

[Triumphrider]

Depends what you want Chad... The 30 and 38 are going to have pretty much the same output until you change injectors and pump. I got the 38 for a steal so why not... If I ever want more its there.