Hello everyone,

I know there are countless posts and threads on SC vs turbo kits but I was looking for feedback from those who have actually had experience with both kits. I'm not looking for more than 370-400whp/wtq on this platform as there is no point due to lack of stability/traction. I know the SC kit will be easier to work on and better thermal management. I'm looking for a kit that will provide instant response, have no issues with on/off throttle and something that I don't feel like I have to wait to get into the heft of the powerband. Both of these kits make similar promises and have been touted for their reliability. Any insight or experience would the community on this is what I am looking for!

 

I dont have experience with either but I have been twin turbo’d, single turbo’d, and supercharged and with your unbelievable realistic power goals I would go with a single turbo. A small to medium sized single turbo will do very well on this platform and your goals.

Each as their own up-sides and downsides.

I will never twin-turbo a car again - it’s essentially twice the cost, twice as many things to break/leak/install and the engine bay is already pretty tight as is. Nothing wrong with a supercharger (belt driven turbo style or roots style) but they will rob torque off the crank. On 400hp build it wont be much but its still something.

A small single turbo will provide the instant response and will be relatively inexpensive, straight forward, and easy to maintain.

my 2cents…

 

Thanks for the reply! In your experience how does response compare between superchargers and small single turbo setups?

 

I agree with James, for those power goals a good single twin scroll turbo would do great.

 

If you were measuring in milli-seconds than the supercharger will make boost / cross the boost threshhold sooner but this is all on paper because there are so many variables that come into play. Roughly speaking a supercharger will start making boost around 2000 to 2500rpm (or at least that’s what I recall when I had my ATI Procharger on my setup). Where a properly sized turbo (and, to be fair to the supercharger argument - a small turbo) capable of 400 to 450hp is probably going to cross the same boost threshold at 2500 rpm to 3000rpms -

I agree with the twin scoll 1000% - but doesnt the turbo kit need to be fabricated where 3 cylinders funnel into one scroll and the other 3 funnel into the 2nd scoll?

I dont know too many kits that do this … it’s like they collect near the transmission and it’s a single 2.5” or 3” to the turbo flange.

Esco - where do you cross boost threshold with your greddy TT kit?

 

I got the old 20G turbos so they are a bit laggy, I'd say 3K prob at least, really never pay to much attention to it but they come on strong. Im gonna be upgrading them and will report back

 

Having a turbo car as a DD, the appropriately sized turbo will feel good but how good is that on a VQ?
My GTI is good off idle to about 4500 RPM and falls on its face. Reason why I want the HKS for the Z, retains stock throttle response with power all the way to redline.

 

Yeah I can only speak from experience from having a V2 GT and never a turbo (this car), but the throttle response and linear delivery are terrific. I'm hoping to get a track day in shortly and I think they will both pay dividends in corner exits. Throw in the (relatively) simple installation, easy heat management and keeping your NA headers, it's a pretty easy sell.

Not ragging on turbos though. Your own usage/application should be the deciding factor between the two, but there there's something enticing about the efficiency of a well-executed, single turbo setup. Figure out your heat management and it'll be a dream.

 

Yeah this is another reason I was thinking about the HKS kit which was due to heat management and ease of servicing. Have you noticed a change in exhaust tone with the HKS kit? Loudness/deepness/idle etc? Thanks!

 

Thats a pretty good point especially considering this will also be used as a daily, the less to worry about the better! I have heard about torque being robbed off the crank but the HKS kit was interesting in how much torque it makes per horsepower but turbos for sure have a higher ceiling

 

Based on the responses so far I am definitely leaning towards the HKS kit for one: two turbos are twice the headache especially when I have to service them and the HKS kit is very linear which I like because I want to retain that N/A feel but would still like to hear feedback from peoples experience with both, thanks!

 

I was between a single turbo and the HKS V2 kit. I just so happened to go single turbo because I came across a used momentum single kit that I'd always wanted.

I have definitely enjoyed the single turbo. It will make whatever power I imagine I would want up to a point. The car made a little over 600whp (somewhat conservatively at 13psi), and it's a riot.

If you are planning a built motor, go single turbo.

I fully intend to get a convertible 350 and run the HKS on a stock block someday for funsies.

 

That Soho single turbo kit looks absolutely baller. Worth a look in.

 

I don't like bay mounted turbos, as the they heat up one part of the engine.

 

def a downside and if it’s one thing that absolutely kills performance and threatens the life/longevity of an turbo’d engine it’d be unnesseccary elevated intake air temps

upside is that its sorta the least amount of hot side plus cold side piping (I would say just edges out a mid-mount setup) of the 4 setups.

A few things can be done to limit and mitigate …