Anyone considered or gone through with an upgrade to their K24s from Forced Performance?

I emailed them asking about building a K24/18g and they responded that generally they install their 68HTA compressor wheel which is billet (lighter than an 18g) and which flows 47 lb/min. Using Todd K's formula of 9.25 hp/lb/min, that equates to 434hp/turbo or 870 crank hp on a 996TT (call it 730whp).

The cost is higher than that of an 18g build (FP wants $2500 for the upgrade + the cost of K24s).

Anyone have any experience? I think these turbos would be far too much for my needs, but if I wouldn't be sacrificing spool and would be buying myself headroom for another 100whp over 24/18gs...it might not be a bad road to take.

Any thoughts/feedback would be great...

 

Planning on building the engine? Would consider that, if not, leave alittle on the table, if you are shortly then tune it to the max.

 

No, definitely not.

The HP projections were just calculating what the turbo could do at their max. I really wouldn't be pushing the car harder than a 24/18g setup (high 500whp) on the stock motor.

Just wondering if these turbos would be wasted or if the pricing isn't terrible. The quotes I have been getting for a set of 24/18g are $3,500 ish, so this option at $4k isn't that much more and I am gauging if it even makes sense...

 

FP's HTAs are considered to be the compressor wheels. Champion uses them in their 68mm VTG turbos and most likely AWD Motorsports' 65mm VTGs use a 65HTA. Widely used in JDMs.

 

But how does the Spool/Lag compare to 18gs? A slightly lighter wheel that flows more doesn't mean it's faster.
These are not ball bearing turbos either? . I wish that could be though.

 

Buy a set of FP HTA 3071 &tial 0,63A/R.
I will go that way really soon.the only thing that you need is a set of vband headers.

 

That might be my next upgrade from my 18gs but since I am only going to run 93 Oct., I might also go with the 3071Tial Alphas if I get an a good price.

 

Definitely some good wheels, but note that Champion uses custom compressor housings for these 68mm exducer wheels, with good reason. IMHO, the K24 comp housing is not well suited for something this big -the wheel is capable of big flow rates but will be limited by the comp housing (and the engine & turbine itself) to lower rates.

Seperate discussion altogther but just because a compressor wheel is capable of a certain flow level at a given PR, doesn't mean the engine will actually use that amount of air. You need to know mass flow rate at your target density ratios, which implies you need to know volumetric efficiency, which the turbine side has a huge say over. Then you can get an idea where you'll be on the compressor map and size the comp wheel accordingly.

Look at the hybrid K16s for example, the record setters are running the old school small Mitsu 16g wheels, not the big 68mm HTAs (which are available with the K16 hotside). Whats the fastest hybrid K24 car out there? ...Chris Green's w/ the old school 18g's. When constrained to the K16 or K24 frame, I think the biggest benefit of these billets is the lighter wheel -more reliable w/ less loads on the CHRA and more responsive, not necessarily more flow/power. I think supporting mods will make a bigger difference than an 18g vs a 68HTA in a K24.

Just my $.02

Edit: Both are fully capable of pretzeling the stock rods

 

Many believe that that theK24/20gs are choked with a K24 hot side?
And those HTA 68 flow more.

 

I have only have heard great things about FP HTA stuff, ill be running the 3076 on my S6 coming soon.

 

what would you recommend as a k24 upgrade to get the best hp for the size of the turbo? im not looking to go any bigger than k24 and have all the supporting mods for bigger turbos but not interested in a full rebuild

 

I will run 94oct allmost like you.A lot of people and tuners believe that the HTA 3076 is a better turbo special if you thinking to built your motor.
I m not sure if I will,that is the reason to preffer the ''smaller'' FP HTA 3071.

 

[QUOTE=Giorgos Cayman;3750563]I will run 94oct allmost like you.A lot of people and tuners believe that the HTA 3076 is a better turbo special if you thinking to built your motor.
I m not sure if I will,that is the reason to preffer the ''smaller'' FP HTA 3071.[/QUOTE

I prefer the 3071 over the 3076 for pump gas on the street with a stock block also.

 

[quote=johnspeed;3750575]I think if your using the .63 housing on either turbo you should be good on stock block. If i were planning on building my motor i would go with the larger .82 housing and 3076.

 

[quote=urluzn2;3750659]Hi,If you dont plan on building your motor what then?
If I may ask, what supporting mods do you have now.. Thanks