SlickZ, actually with a twin turbo setup it has minimal lag, because it is two smaller turbo's. A single turbo setup has the most lag because it is a huge turbo and it takes longer to spin the fan. The supercharger I am pretty sure (correct me if I am wrong) has the least amount of lag because it is driven by a belt so it doesn't have to rely on air to spin it. But single turbo's, most of the time, produce more horsepower.

 

That would calculate to only 4% drivetrain loss based on their new stats they had on the car at IAS (350hp flywheel @ 5.7)

Looks like they're still tuning it up and down quite a bit -- probably looking for something that will get them CARB certified with max gains.

 

not always so. There are turbo's that can and will spool faster than SC's. SC's, remember, drive off of the crank, so they are still dependant on engine RPMs to create boost.

 

Yeah, everytime I see an update, it's a different hp. Also, I want to see some torque numbers.

 

You are correct as long as you are talking about positive-displacement type SC's.

 

Depends on the type of SC. A centrifugal SC will still have lag.

 

It all depends on turbo size and efficiency. I can assure you that the turbos in the Greddy kit are in no way "small". Those same turbos will put down 600+ rwhp on a 300zx TT .

I really think they should go with a smaller more manageable turbo...something that will put out the required 75-80 rwhp...basically stock Skyline turbos, TD04's etc, turbos that would put us at 310-320 rwhp. The kit would be a lot less expensive, a lot more reliable and a hell of a lot easier to tune.

--wes

 

Yeah, I've thought about that too. I mean a kit that uses your stock injectors and fuel pump to the max effeciency. I don't know how much hp our stock injectors and pump can handle but they usually have a buffer for safety. This would definitely keep the cost down.
But on the other hand, I would also like a kit that has room for growth. I mean 18g's can make as little (need decent sized wastegate) or as much power as most people want. So in the future if I want to switch to low CR pistons and forged steel rods and up the boost, I won't have to change my turbos to support it.
Ideally, I would like to have the option to do either.

 

joeshow750- I agree, the reason I would choose the Greddy kit over, say, the procharger is the ability to do internals and turn up the boost without having to get a new system. I'm still waiting to see #'s and prices though.

 

Yeah, definitely waiting on the prices. One thing I should mention though about the Procharger system is that you don't necessarily need to get a new system/SC to raise boost. You can up the boost by changing the pulley to something smaller in order to spin the SC at a higher rpm. Granted, this is more hassle than an EBC and I doubt if the Procharger kit will come with engine/fuel management like E-manage. Moreover, I don't know how much the SC is rated to support/flow in hp, since I don't know the trim on the compressor. If it's not rated to flow more hp than it's currently providing, upping the boost will only raise the chances of detonation. For me, right now, it's still a toss up, and I need more information on each kit.