HKSGT** head to head with GCG H-flow

[SLY33]

hi guys,

every week there is a new thread asking about GCG hi flows vs HKS GTseries bolt on upgrades for 33's.

I myself went the HKS, but still strongly considered the GCG.

I thought it would be interesting if we get a few cars together with the above mentioned upgrades and do some road tests, as i think it would be great to put them side by side and compare lag vs top end etc.

Mainly im interested in seeing them side by side rolling runs from 2nd, 3rd, 4th etc.

Id also be keen to go for a ride in a GCG hiflow fitted 33 for seat of pants comparison.

Would anyone be interested in getting together for this?

[benm]

I'd love to see the turbo swapped on the same R33 GTS-t rather than 2 different cars with diff engines and mods etc with dyno runs done. Quite difficult/expensive to do I know...

I wonder if GCG themselves would like to do it on a car for a day, imagine the sales they would generate if they put aside a day to do this.

[craz0]

I agree with benm I would like to see GCG & HKS turbos on the same car and same Dyno.

[Merli]

Shouldn't be too hard if you compare an HKS GT3040 vs. Garrett GT30 (GCG) on an R33 GTS-t with a high mount manifold.

But this isn't indicative of other turbo pairings though... You'd have to compare them all doing a straight swap on the same car to get a definitive comparison.

[SLY33]

yeah ive thought about that too in order to do a critical comparison, but for real world comparison each person is going to have a diferent tuner anyways. Im not talking so much about power but more how they drive. Also it should be easier to get a group of cars together than to find someone who wants to swap their HKS for a GCG or vice versa.

[Merli]

yeah ive thought about that too in order to do a critical comparison, but for real world comparison each person is going to have a diferent tuner anyways.  Im not talking so much about power but more how they drive.  Also it should be easier to get a group of cars together than to find someone who wants to swap their HKS for a GCG or vice versa.

If you compare two different cars for the aim of having an honest comparison about the turbos, you HAVE to factor in all the other differing mods done to the cars. Hell, something as small as one person having new APEXi pods and the other one dirty HKS pods can produce as much as 5rwkw difference, let alone cams, throttle bodies, head work, ECU tuning, engine compression, etc etc etc...

Those kinds of comparisons are fine for good fun (like we're doing down in Melbourne in a few months re: GTR low mount turbo choices), but it's hardly a scientific comparison.

[SLY33]

guys maybe i shouldve stated that im not looking for a scientific comparison! I just want to get a few cars in question together to see how they go, call it just for fun then.

[paulr33]

word up, should be an awesome comparsion. i hear heaps that the 2530 is too small for rb25 and that gcg 450hp highflow is sweet, but ive also heard gcg hiflow isnt as good (MRK-25T ??). I'd love to see a mod list from a few cars that have both so we can see what gets what. should be a great topic

[Guest Robo's]

SLY33, u have a 2530 dont you, are you still running standard injectors and fuel pump?? For the power you have around (227rwkw wasnt it) wasnt your 1/4 mile around the 13.0 @113??? If it was that is very impressive !!!

Are you running a Power FC??

[benm]

For the power you have around (227rwkw wasnt it) wasnt your 1/4 mile around the 13.0 @113???  If it was that is very impressive !!!

According to my website it is 13.0@113mph with a 2.3 60ft, so he has easy 12.7's waiting for him with a decent launch

[SLY33]

yeah 13.0 and 114 mph (not 113)

yes i have a power fc, and that run was with 218rwkw (high flow cat knocked of ~10rwkw.)

i dont have the std pump, running an 044, with std injectors.

[SLY33]

is there one person with a high flow GCG that wants to meet up?

[Guest Robo's]

Well by going by the MPH, thats a pretty quick car, i would be happy with that MPH, obviously the rwkw doesnt give it justice with its torque.

[BHDave]

Don't think i'm invited, rb20 with stage 2 gcg highflow. It brings new meaning to the term laggy

boost curve is something like:

2000rpm 0psi

2500rpm 0psi

3000rpm 1psi

3500rpm 3psi

4000rpm 6psi

4200rpm 12psi

i only run 12psi atm until the new injectors go in next month and the car gets a tune

makes 173rwkw atm

[gtrGhosTDoGG11]

Anyone want to start a group buy for gcg high flows?

[benm]

That could be abit more difficult then a regular groupbuy as generally you need to take your std turbo in and leave it with them for a couple of days.

[justin911]

hi

quick question.. what is a gcg high flow ???

I was always planning on getting a hks 2540 for my ol r33

[Nozila]

is that question suppose to be a joke?

[croat]

I got a HKS GT-RS if anyone in sydney wants top meet up to compare. Just pm me or arrange to all meet at creek someday

[paulr33]

if it was a joke he wouldnt have asked. justin a highflow is they get your stock turbo change the compressor wheel and ball bearing pack and new exhaust wheel. it enables it to flow more and run more pressure through it as its a better/stronger compressor wheel and the bearings are new. you keep the same size/housing so it bolts back up and you dont have to change anyting.

just take off, send away, get it back, put it back on and you can turn up the boost more. the 2540 is a mismatched turbo so either 2530 or 2535 or gt-rs. search on 2540 and lag. youll find heaps of threads covering the 2540 being extra laggy due to a mismatch