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HKSGT** head to head with GCG H-flow

SLY33

By SLY33,
in Engines & Forced Induction

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SLY33 Mentor

SLY33

Posted
Posted

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?

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https://www.sau.com.au/forums/topic/42013-hksgt-head-to-head-with-gcg-h-flow/
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benm Grand Master

benm

Posted
Posted

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.

Merli Grand Master

Merli

Posted
Posted

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 Mentor

SLY33

Posted
  • Author
Posted

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 Grand Master

Merli

Posted
Posted
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.

paulr33 Grand Master

paulr33

Posted
Posted

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

benm Grand Master

benm

Posted
Posted
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 :)
BHDave Grand Master

BHDave

Posted
Posted

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

  • 1 year later...
paulr33 Grand Master

paulr33

Posted
Posted

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

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