Supercharging The V35

[Sydneykid]

HKS had the 3 kits (single turbo, twin turbo and supercharger) at SEMA, my pick was the twin turbo kit. My reasons for not choosing the the HKS supercharger kit are pretty much the same as for the Stillen kit, except for the whine of course. Both the supercharger and single turbo kits come complete, every required nut, bolt, washer and clamp is included. Compared to the twin turbo kit which leaves a fair bit to be fabricated on the inlet side.

Although it's a perfectly acceptable solution, I am not a big fan of the single turbo kit. I don't like the cross over exhaust pipe, the heat transfer into the rear of the engine block and, to a lesser extent, the firewall. Plus it adds distance between the RH bank of cylinders and the turbo while placing the LH bank right at the turbine. This manifests itself as minor differences in exhaust gas temperature and turbine acceleration (lag if you like). With the single turbine exhaust you end up requiring a diverging ("adaptor") pipe to get a twin exhaust system to fit. To me a twin turbo system on a V engine seems a much more logical solution and also offers some technical advantage to do with the packaging compromises of a single turbo.

That said, the single turbo would be easier to comply, emmissions wise, as the single cat would come up to temperature faster. But Nissan managed to get the R35GTR to comply, so its obvioulsy possible to achieve with a twin turbo layout. To support that logic I received an email last night from a guy in the US that I talked to at SEMA and he had his Z33 with HKS twin turbo kit (GT2530's) complied using the standard cats.

Cheers

Gary

[WazR32GTSt]

HKS had the 3 kits (single turbo, twin turbo and supercharger) at SEMA, my pick was the twin turbo kit. My reasons for not choosing the the HKS supercharger kit are pretty much the same as for the Stillen kit, except for the whine of course. Both the supercharger and single turbo kits come complete, every required nut, bolt, washer and clamp is included. Compared to the twin turbo kit which leaves a fair bit to be fabricated on the inlet side.

Although it's a perfectly acceptable solution, I am not a big fan of the single turbo kit. I don't like the cross over exhaust pipe, the heat transfer into the rear of the engine block and, to a lesser extent, the firewall. Plus it adds distance between the RH bank of cylinders and the turbo while placing the LH bank right at the turbine. This manifests itself as minor differences in exhaust gas temperature and turbine acceleration (lag if you like). With the single turbine exhaust you end up requiring a diverging ("adaptor") pipe to get a twin exhaust system to fit. To me a twin turbo system on a V engine seems a much more logical solution and also offers some technical advantage to do with the packaging compromises of a single turbo.

That said, the single turbo would be easier to comply, emmissions wise, as the single cat would come up to temperature faster. But Nissan managed to get the R35GTR to comply, so its obvioulsy possible to achieve with a twin turbo layout. To support that logic I received an email last night from a guy in the US that I talked to at SEMA and he had his Z33 with HKS twin turbo kit (GT2530's) complied using the standard cats.

Cheers

Gary

i'vbe done a bit of a look into this HKS kit..

appears quite nice to me compred to the stillen kit, not too sure how the boost delivery would compare to a turbo setup.. anyone read much comparing centrifugal s/c setups to a turbo?

also, the current HKS supercharger kit appears to be the GT kit while their old kit is the rotrex kit. not too sufe if these are different but i have seen them referred to differently.. i wonder if they chagned the design recently?

either way it appears to be well constructed and fits under the stock bonnet without much fuss..

my current thinking is whether the kit requires extensive tuning as i know there are very few HKS certified tuners across australia. many of these "complete" systems come pre-tuned so that might help its cause.

i might look into this a bit more!

[Unique]

Warren, I have had a look at this a while ago and also liked the stillen kit as it offered everything, whilst maintaining a good price. What stopped me was the bonnet. I hated the look of the aftermarket bonnets on offer and I also doubted their legality (as not metal and would effect crumple zones) thus effecting insurance.

On other another note, there is not a lot of room if useing a centrifugal supercharger. This would also take away any chance of keeping the stock air box as they are placed almost right where the air box is located (probably most FI will do without this unfortunately).

I like more and more the twin turbo set up, but cannot justify the cost.

[WazR32GTSt]

yeah the bonnet is an issue for me..

the centrifugal kits seem to all lose the stock airbox, but no doubt an aftermarket airbox can be made to cover the supplied air filter and make it look more stock..

really, if it can be engineered to be legal, i don;t really care how the engine bay looks!

has anyone any experience with engineering products to be legal?

[Martin HKS]

Warren, I'll get back to you on Monday when back in the office about you questions. Hope the info was informative.

Originally HKS contracted Rotrex for the supercharger but wasn't happy with the result so designed and built their own supercharger which currently can support 500hp with stronger engine internals.

Cheers

Marty

Sydneykid, I don't seem to be able to post up the pics of the HKS Twin Turbo Set-up Kit I have. This site doesn't like them. I'll have HKS send them again to me in another format and see how that goes. Or shoot me an email and I'll send the info. Sorry.

Regards

Martin

Edited July 18, 2008 by Martin HKS

[WazR32GTSt]

thanks martin, i look forward to hearing back regarding the other questions about price and the tuning of hte ECU..

[Stephen Thorpe]

Where did all of this go?

[jaik]

Dude, you'd be mad not to get a G35 Vortech Kit out of the US. I got mine from Performancefactory.com - cost me about $6k landed when the dollar was good. Came with everything, plug and play. Spent about 14hr fitting it myself, ECU worked like a charm and after a minor touch up tune ($200) i spun up 360RWHP with my 5AT drivetrain. ECU is easy to tune yourself/tuner on dyno. Cannot complain, easy to follow instructions, easy to upgrade the pulley for more boost etc - car response was phenominal!

PM me for more info if you want!

JK

[Stephen Thorpe]

Thanks Jai, I have been looking from a far at your car for sale. Wish it was a manual!

Looks good, but if (more like when!) I get an V35, I will start off NA and then maybe look at FI.

Have to get used to the steady flow of torque that my current car seems lacking.

Would the 6 speed cope with the S/C, in your opinion?

What boost can it go to?

Did it need a decompression plate as the std (18psi) is still quite high?

Edited November 1, 2008 by Stephen Thorpe

[WazR32GTSt]

why does it have to be manual? have you driven a 5AT V35? its an amazing transmission, nothing like the one in the R32/33/34...

Edited November 1, 2008 by WazR32GTSt

[jaik]

The Jatco Tranny is good, but definately not programmed to swiftly change when the RPM climbs alot quicker than expected aka forced induction. MT Automatics in SA do a quickshift kit for $700. Special removal proceedure for the Valve Body which Michael can send you.

No real complaints about the auto otherwise!

JK

[Stephen Thorpe]

why does it have to be manual? have you driven a 5AT V35? its an amazing transmission, nothing like the one in the R32/33/34...

Yes, the only V35 I have driven is an Auto and yes it was a good gearbox, but sorry I doubt that I will ever own an Auto, just not my thing.

I suppose if I compared it with other Aussie Vehicles and their Auto's, it would be like chalk and cheese, however it just doesn't float my boat.

Edited November 1, 2008 by Stephen Thorpe

[whtbox]

The Jatco Tranny is good, but definately not programmed to swiftly change when the RPM climbs alot quicker than expected aka forced induction. MT Automatics in SA do a quickshift kit for $700. Special removal proceedure for the Valve Body which Michael can send you.

No real complaints about the auto otherwise!

JK

can you give me or pm me more details about the upgrade of the Valve body in SA?

What's the company that did it? any details? do you have to send your valve body there or swap?

Cheers

[_L8RSXY_]

How much are you willing to spend ??

[nitznair]

How did this go? Any updates?