K16 hybrid a28


I have older k16/GT28 hybrids and the Throttle response n spool is amazing never waiting for power in the twisties like the canyons.

The alpha 28 will be an upgraded version of what I have and should spool a tad faster.

The other option is a k16/16g but I think you'll be happier with an a28 for your application.

 

I have tracked my car once this summer at Gingerman, I am by no means a good driver this being my 5th time at that track with no previous DE experience. However, I can say that with my setup I was never out of boost and felt that with a better driver this car would be a force to reckon with. Mods are listed on my sig.

 

OK, question for those with alpha 28, a friend of mine just bought a 996tt with this setup but the car is now rwd. It feels like it is impossible to get into boost without getting wheel spin. Would you guys put back the stock awd system with a car with that much power on the track?

We haven't tried the car yet on the track but i really like my awd since it grips really hard coming out of corner with my k16/24, can't imagine how hard it must be with his alpha 28 and 2wd...

anyone has any experience with this?

 

An LSD with good tires will cure that

 

my friend made like 600whp with k16 billet

 

I had the k16/16g and now the k24/18g. 16g is the best for track IMO. Fast spool matters in slow tracks.

 

You really want to go 16/? but it also does depend on circuit etc.

For me the perfect example is the Ring, when I ran 24's there, the car was very difficult to keep a consistent level of power mid to exit where as a 16 would feel just right and be easily controllable. In some cases with the 24's you would actually lose out as you had to back of the gas, otherwise you would feel a sudden burst of power through the corner and all of a sudden the back end is stepping out (had this on a number of occasions) I suppose you could adjust your tune, but you really want the cars revs to be high (in the boost) so you have a bit more control... I would say a 16/16g or a 16/24 would be the way to go, I run a set of those 16/26 ZC that Kevin specially made and run a tune that started life for a 16/16g then Todd worked on adjusting this, have to say I'm relatively happy with things.

 

also the tune and timing advance can effect this alot you dont want peak HP ona track car u want a smooth torque curve to not upset the car mid turn.

 

GT28's on my GT700 kit work very well on the track. Never have any boost lag and have been very reliable. I will say my car is AWD and even with Hoosier track tires there are some slower corners that I spin all four coming out of!

 

billet k16, give you plenty of on demand power

 

As most have said, any good k16 based solution is the best answer to your needs. I just finished reading a very good driving book written by a professional racer, and it echoed what most who track already know, which is that flexibility is just as if not more important than peak power on the track. Flexibility being roughly defined as "the area between the motor's peak torque and its peak horsepower", which can alternatively be thought of as the oft quoted "area under the curve". This is an area where larger turbos simply dont live.

I have tracked my friends gt700 with k16/gt28s on race gas, and it spools in 0 seconds flat and pulls like a train, spiking to 1.5bar. If that isn't enough power for you, you are far braver than I.

The question I have wondered about for my eventual turbo swap is how something like a 16g or a 16 billet would stack up against this partial ball bearing garrett turbo.

 

vbmw.....you've had both kits.The lag in the K24/18g is much greater then the K16/16g ?? what are the differences between both kits ?? Thanks

Rolando

 

Yes the lag is noticeable in the 18G compared to 16G. The 18G pulls where the 16G dies on the top end, other than that 16G has loads of TQ in the low end and really great for street and track. 18G IMO is very linear and makes more power in the higher rpms.

I like both , but prefer 16G for street/track duty.

 

to much lag go down a gear, i'm running Alpha 3071's with 50/50 water meth, ic's, 72lb inject, 5 bar and EPL tune, depends on the track, last weekend I mainly ran the entire track with 3rd gear with no lag, straights hit the gears up now I know I need better brakes.....and tires

 

I had these K16 hotside 28's and though they are old tech, they were a perfect track turbo since they had no lag whatsoever and by the time they died out up top you were coming into another turn.