Greddy Twin-Turbo In Development

OMGWTFBBQ

I'm actually interested to see what GReddy comes up with. I'm most likely going to get a supercharger if I ever go the F/I route, but more options on the market never hurt anyone right?

I agree 100% with what Phimosis has said in this thread though.

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jmlenz

Great news that Greddy is jumping into the 370z FI fray! They had a pretty good kit for the 350z/G35 so I would expect nothing less for the 370.

I noticed a shot of Greddys new Ti-C exhaust as well...sexy

Dual 2.75" !!

Sharif@Forged

The new gen Nissan motors response to well to twin turbo setups, I think this will be the FI of choice moving forward. Superchargers, frankly, just aren't that exciting on small displacement engines, and will never offer the shear power and overall performance benifits of a properly spec'ed TT setup. Of course, they will be priced lower, than TT's but that is the only benefit I see.

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Phimosis

Huh? The only benefit is price? Simplied install and removal. Less auxiliary parts required. Simplfied tuning. Increased reliability. The list of benefits is long. If you can point me to a turbo tuner that offers CARB certification and a 3 year 36,000 mile warranty, please point me to them. I have never seen that for any other aftermarket turbo setup, so I don't expect any breakthrough for the 370z.

I would restate the argument as the only benefit that turbos have is a higher hp output.
I do want more power than stock, but I don't need 600 whp to be satisfied.

Sharif@Forged

If you are located in California, there are many more considerations. You are correct, in that CARB exemption will not be earned with any TT kits in the foreseable future.

Simplified installation and less parts, typically translates into less costs, and lower price. The 3 year warranty offer by the Stillen kit in the 350Z world, is very restrictive, nearly to the point of being worthless.

In terms of reliability, they both have their pros and cons, but from our experience, TT's are just as safe as SC's when installed, tuned, and setup properly. The perception that SC's are safer, stems from the fact that you have a higher margin for error in tuning/setup.

Ask anyone that has driven a SC 350Z, and a TT 350Z back to back. I promised you if money/CARB was not a consideration, everyone would want the TT.

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t-ray

On the g35/350z, there were four superchargers available: vortech, hks, stillen, and procharger. The stillen was the only roots type. The vortech and procharger were both centrifugal units. The hks was a rotrex unit.

The stillen made great torque down low, as typical of a roots, but it gave up *way* early. I know of a stillen stage1 g35 coupe down in florida that ran high 13's in the quarter at like 101mph. My g35 runs low 13's at 104mph with boltons. The undersized roots unit used by stillen is the joke of the forced induction community in the g35/350z world.

The vortech and procharger units make much more power than the stillen. But because they are centrifugal units, they make no torque. Also, they have problems holding on to the belts using the smaller pulleys. And you want to talk about reliability? The vortech blowers have had problems with bearings lately.

On Sharif's dyno(a dyno dynamics), a bone stock VQ35DE with a vortech might put down around 340whp out of the box. The same car, with say an APS single or a Turbonetics single(the second most disparaged FI kit) will put down the same rough peak power, but will also put down close to 100wtq more than the vortech.

To demonstrate the difference in torque, many supercharger owners go for shorter gears(say 3.92's or 4.0's), to get into boost more quickly. But the turbo guys, if they do anything with gears, always go to taller gears(3.54's to 3.3's for the manual guys).

And before you buy into any kind of warranty offered by Stillen, check around the g/z world to see how well that warranty worked out. I know of a guy in kentucky that slung a rod; he had his car trucked down to Atlanta and Sharif performed the post-mortem on the engine. He also did all of the footwork on the warranty. That was a couple of years ago, and I'm not sure the car's owner got everything worked out on the warranty. Also, that warranty was only offered on the Stage 2 version of Stillen's kit. If you wanted a Stage 1 or 3, you didn't have that option.

mrmixitup

I'm not swapping pullies and I'm not replacing a belt every week.

Put me down for a turbo kit.

I do plan to purchase one in the very near future.

jam0321

take a look here Turbonetics received CARB cert for its Mustang kit and Turbonetics kits come with warranties as well.

KillerBee370

TT for me when it's available.

sidewayz34

How will the 2.75" GReddy exhaust compare to any other 3" after-market exhaust? Mainly for the guys who really want to go FI, would this be a good route to go? I really want to see what the difference will be.

Sharif@Forged

A Greddy true dual 2.75 incher would be ideal for FI. Easily will handle 650-750whp if needed....same type of designs we've used on the 350Z TT.

A 2.5 inch true dual, while not optimal, would be perfectly happy in the 450-500whp range, but more power will always be available with a slightly larger exhaust, at just about any boost level.

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sidewayz34

Thanks alot, could of not put it in better words !

LiquidZ

So are you saying that if I had a 2.5" (outer diameter) exhaust installed on my car, it will be more than adequate up to 450 whp? In other words, I would see no benefit of upgrading to a bigger exhaust diameter up to that power level?

If I drift away from a S/C, I would like a pair of very small turbos.

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terrycs

Yes. I'm getting 470WHp with no problem on my 2.25" Fast Intentions w/test pipes. 2.5"+ would be better but the cost is more noise.

jmlenz

dual 2.5" is typically good for up to 500whp. >500whp it becomes a bottleneck from what I have heard. If your shooting for 500-600whp 2.75" should be cool. 3" for overkill or 600whp+