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HKSGT** head to head with GCG H-flow

SLY33

By SLY33,
in Engines & Forced Induction

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jazza08 Mentor

jazza08

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

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

Is this the 450hp r33 GCG turbo rebuild on an rb20??

As im looking at doin this myself, but thats abit friggen laggy...

Do you have 3' or 2.5' intercooler piping? 3' Dump? Is it split? Just a few things that have some say on lag...

BHDave Grand Master

BHDave

Posted
Posted
Is this the 450hp r33 GCG turbo rebuild on an rb20??

As im looking at doin this myself, but thats abit friggen laggy...

Do you have 3' or 2.5' intercooler piping? 3' Dump? Is it split? Just a few things that have some say on lag...

It's the old style stage 2 highflow (rated around 480hp when they were still sold)

It will be a bit laggier than the current highflows that are sold by GCG which are pretty much the original stage 1 highflows (450 hp)

It wasn't as bad as it looks, in the end i just got used to driving above 4k when i wanted to go fast and it used to come on boost hard and spin up the wheels from 4500 to redline easily in second. Trouble was on the 1st-2nd change it would drop back below the boost threshold so you couldn't keep it going through 1st and second.

Injectors went in and shortly after that the car developed a mystery missfire and the engine started to get a bit tired (probably form being driven over 4k all the time). I wound up the boost to 15psi at the end as i didn't really care if i popped the engine and it went even quicker, regularly breaking traction in third. Seat of the pants it was making a fair bit more than the 173.

In the end i chucked an rb25 in the car. Running the same turbo and a manifold with a piss weak home tune it made a very easy 200rwkw on 14psi. A/f in the 11s. Still a bit slow to come on boost though.

ECR033 Mentor

ECR033

Posted
Posted

I'd also love to see some sort of decent comparison between the hi-flow and the GT-RS. Having heard many differing opinions on both turbos (mostly from partially biased owners trying to justify the $$$ spent), it would be nice to have a more concrete set of performance results to compare from both turbos on the same set up.

This info would be particularly helpful as I'm also in the process of deciding whether spending the extra dollars on the GT-RS is worth it for me...

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