Can't give you a 100% firm date right now as engineering is totally commited to the Intercooled Twin Turbo development to suit the C6 Corvette at the moment.

When the C6 Corvette TT is totally complete the 350Z tooling for the APS Intercooled single Turbo system is next in line for engineering, best estimate would be May/June 05 maybe earlier with a little luck.

Thanks

Peter

 

what about the TT kit for the G35 is that being worked on now as we speak?

 

Not right at the moment though a number of the APS engineering team are having a good look and thorough think tank before rushing in.............you know kind of measure twice before you cut once type of deal.

Thanks

Peter

 

You ppl are sick.

 

Peter, Please please please..., put the G35 job before the Single "sidewinder" kit....did I mention please?

 

Or better yet, use a G35 for the sidewinder kit. I assume a single turbo wouldn't require as much efficiency from the intercooler?

 

No way, don't agree with that. Anyway a lot less work porting the TT kit to the G35 and I will gladly pay the extra ~2k for the wider TQ band offered by the TTs.

 

I hear you G3po and will do........the G35 TT system will finished first.......we won't let down all of the G35 guys who we've made promises to previously.

Thanks

Peter

 

Thought you'd like that..................an Intercooled Twin Turbo C6 Corvette with over 600 horsepower would be a wicked car to own.

Peter

 

Peter,
Will you also offer the single turbo for the G35? I know you can't give a final price yet but an estimate would greatly be appreciated. Approximately $3-4K or $4-5K? More or less?

Thanks

 

It's possible that APS will offer a single turbo system for the G35 though our main focus is on the Intercooled TT system right now.

Price all depends on what components we package in the system though if we go down the path of a very complete Intercooled Turbo system (total fuel system, bov, computer, cat converter, etc, etc) I belive it would be in the 5 to 6-k range at MSRP, best estimete only.

Will keep you guys updated with progress on the G35 TT system as more info comes to hand.

Thanks

Peter

 

Peter,
How much would you estimate the TT kit for the C6 to be? Would be very interested.

 

Best guess for now will be around the 12K mark for the Twin Intercooled Twin Turbocharged C6 Corvette................will know more early next year.

Pm me at any time if you want further info on the Corvette TT system.

Thanks

Peter

 

Awesome! With your TT pricing im sure your single turbocharger will be priced correctly. The Turbonetics kit to me is just WAY to expensive for the components involved. Many might try and argue but most TT's are going for low $5,000 and are very complete. I like the Turbonetics kit but can see a lot of extra goodies that would need to be purchased like oil-pan, engine management, etc... I can't wait to see your finished product, im very patient. I know you said it wont be carb legal, but pricing sometimes can play a BIG role if its worth the CARB CERTIFICATION or not..

 

Peter,

For the single turbo in development, is the intention to make 2 exhaust manifolds for the system or is only one really needed and the other can left stock? sort of thinking out loud, is there a crossover point in the RPM range where a single turbo would perform above a twin setup for the VQ engine?

thanks

 

I believe you guys will see loads of value in the APS Intercooled Turbo system.................no doubt APS intends to package all of the high quality engineered components (Latest Garrett watercooled turbo technology) to make this a real turn key powerful solution whilst offering incredible value for $$$$$ spent.

I genuinely believe that the APS Intercooled Single Turbo system will offer a real cost effective alternative, similar MSRP (around the 5k price) to the more popular supercharger systems and provide superior performance over most if not all supercharger systems.

We anticipate that the entire APS Turbo System could be installed in approximately 10 to 12 hours depending on the expertise of the installer and shop equipment available.

It definitely will never meet the CARB emission requirements though will/should meet the normal SMOG test that most states enforce (IM 240) SMOG test.

Will keep you guys updated along the Journey.

Thanks

peter

 

Can't wait... And from what I have seen on the HIGHLY DETAILED instructions you guys provided in the TT Setup I can just see this already being a walk-in-the park install! ::THUMBS UP::

Im glad your using Garret turbos, nothing but HIGH QUALITY.. I belive HKS uses Garret turbos also

 

APS may well make 2 new exhaust manifolds (definitely one new cast ductile iron turbo manifold at a minimum) though I will need to wait and see how durability testing concludes before knowing more about the second exhaust manifold............a second exhaust manifold would be my preference for sure.

Now to your question on the power curves single turbo v Twin turbo.

The power curves and at what point the curves cross will depend predominantly on the size of the single turbo.

The APS twin turbos have approx 80 lbs per minute total air flow where as a single turbo which would produce a reasonable low to mid range power curve would be limited to around 60 lb per minute mass air flow sized turbo.

The way I see this there are 3 different scenarios:

1) To achieve similar low to mid RPM power and turbocharger response as the APS Twin Turbochargers (80 lb per minute = 800 hp) one would need to specify a single turbo of around 60 lb per minute = 600 crankshaft maximum Horsepower.

2) To achieve the same outright horsepower as the APS Twin Turbochargers, one would need to specify a single 80 lb per minute turbocharger - which is a massive turbocharger for a 3.5 L engine. The down side is that the low to mid RPM response would be greatly compromised.

3) To achieve higher horsepower than the APS Twin Turbochargers, one would need to specify an even larger single turbocharger - say around 90 lb per minute mass air flow. This turbocharger would have an operational range starting at 5,000 RPM (no useable power to speak of below 5,000 RPM). In this case, the engine would need to turn out to over 9,000 RPM to have a worthwhile power band. This single turbocharger may be viable in a competition engine which spends little time below 5,000 RPM, but be unpleasant on the road in most driving conditions.

So to answer your question, there will be a crossover point if the single turbocharger is significantly larger than the twin turbochargers - and only in case 3 (where the single is larger in total air mass flow rate than the twin turbochargers). This cross over point will be at some point around 6500 RPM (my best estimate only).

But getting back to production specification - a single 60 lb per minute single ball bearing turbocharger (600 hp turbo) - it's power curve will always be below that of the twin ball bearing turbochargers (800 hp total) at the same boost level. It's virtually impossible to achieve the same low to mid range power and turbocharger response from a large single turbocharger in a V configuration engine.

If the single turbocharger is matched to produce strong low to mid range performance (which would be my choice) then obviously the turbocharger specification will need to be precisely matched to the engine capacity. Bottom line, a large single turbocharger matched for strong low to mid range performance on the Z V6 engine will always have a power ceiling of around 600 flywheel horsepower (around 500 wheel horsepower).

Regardless of the single turbocharger size, the real issue pertaining to high horsepower on a single turbo conversion for the Z is the very limited space available to package an exhaust downpipe capable of producing over 500 wheel horsepower. This is where we see the real limitation of the single turbo design for the Z in comparison to the twin turbo approach, unless you're prepared to cut the body sheet metal and make some fairly radical mods.

It's all very well to have an large single turbo, but when it's limited to around 500 horsepower due to a restrictive exhaust down pipe, you'll never see the real potential of the large single turbocharger.

Hope this helps to put the single turbo in perspective for you - and to give you an idea of the challenges that are presented to APS as turbocharger system design specialist.

In my view a well designed single intercooled turbo system with a well matched turbo would be a very streetable package on the V6 350Z engine up to around 500 wheel horsepower.

Thanks

Peter

 

Single Turbo vs Twin Turbo on a V engine 101 by Professor Peter.

Class dismissed.

 

Hey I'd love to take all of the credit for that post though the truth is there were at least 2 other APS professor's who had input to that thread (one being an ex Garrett turbo applicaton engineer) and the other with many years of turbo design experience.

Thanks

peter