Interesting.

For me. It would make more sense on a single turbo setup to match the turbo’s specs to the engine’s max output on stock internals. I think to stay reliable most would agree that 450rwhp is the magic barrier ( I would feel more comfortable around 410) where most ppl start thinking about building the bottom end on this car if they want to go higher.


The smaller turbo with less max potential would spool faster and earlier and generate more total area under the curve where it counts at the sacrifice of the big numbers on the big end.

Anyone that is investing money into building the bottom end isn’t going to blink at the extra cost, minimal in comparison, to upgrade the turbo to a 600rwhp capable snail.

I know not everyone sees it this way and for some reason the final number is more important than the area under the curve, but I would rather run a smaller turbo (still going to exceed engine capabilities) and use ALL of it... in more of the RPM range than run a turbo I can’t utilize until I build the bottom end.

Either way, single turbo is the route I want......even if I have to take what is made available and test until I find the combo right for me.

I like what I see so far in this kit, but I'm still open on it.

I look forward to your offering Peter, any idea when we could start seeing some chatter about it? I want to make an informed decision.

Also, I can assume from your twin setup that it will be unlikely to compare price wise to the T-netics kit

Thanks in advance

 

Ok Good post though there are a number of assumptions that you've made which aren't correct from an engineering view point pertaining to the single turbo application,

1) In the case of the 350Z the physical space available to package a large single turbocharger is just as constrained as that which applies to the twin Turbo approach, EG there's not that much space available in the only area open to a single turbo installation (limited to approx a 800 Horsepower single turbo).

2) In the space available to package Twin Turbos APS can install Garrett Ball bearing turbos to support up to 1200 Horsepower without any modification to the engine bay or the car's sheetmetal.

3) As a result of the above points if all we are discussing is maximum power potential (which I would not normally do) then in this particular application the Twin Turbos can produce much higher power than that of the largest single turbo that can be physically and practically installed without cutting the car to pieces.

4) The other significant problem that I see with the single turbo in the 350Z is the size of the down pipe that can be practically installed from the outlet of the turbocharger. This I believe will limit the maximum power output given that any down pipe bigger than 3'' would require major surgery to the engine sheetmetal within the engine compartment.

Whilst on the surface the big single turbo approach sounds attractive though the reality is this approach has some major problems from an engineering perspective.

The obvious advantage of a large single turbo is undoubtly lower production and engineering development costs. From there on every performance trade off is definitely in the favour of the Twin Turbo system design.

Thanks

Peter

 

Yes Twin Turbo Systems do have significant advantages over that of a single turbo on a V configuration engine.

The only down side to the Intercooled Twin Turbo system is the higher engineering cost (no disadvantage to the consumer) and the higher initial purchase cost, from there on in the Twin Turbo approach easily wins in all aspects of road and track performance on the Z car.

Thanks

Peter

 

I'm sorry to tell you but the fastest Nissan on the Planet is the 300zx of Lazcano... He live here in Puerto Rico and the car have a 3.3 VQ with a Single Turbo... best time was 7.10@195 mph

Btw he change his 300ZX chasis for a 350Z chasis

 

I am not assuming anything. In first gear you might not get any boost and you might not get full boost untill sixth gear. That is how turbos work.

 

hell yeah dude, VQ30 crank, rods, and pistons are better than the VQ35, yo!!!!

 

Well rigth now the kit put all his boost in firts gear... This Turbo is not that big!

 

Yeah though I'm not discussing a 300ZX.......... there's a huge difference between a daily driven Z street car and an out an out drag car that gets to the track once a week or so.

Thanks

Peter

 

Absolutely spot on.......a turbocharger is load dependent.......the sooner the engine sees load the faster the turbo comes on boost.

Peter

APS

 

I have a question. The turbo seems to sit close to the head lamp, would this cause a problem when the car is driven hard ie a track day or long distance?

 

good question ... I think a lil' heat shield could be created to alleviate that problem. it may take away from the looks a tad ... but it could add a nice sense of security for our $500 headlamps

 

OK but seriosly this is pointless, the facts are that this kit produce power, have a very nice price and you can install it in one day... that are very strong reason to buy this kit... any person with comun sense don't spend around $4500 (with intall) more for one TT kit that have little less lag that this kit... is not worth it, if you see the videos you can notice that the car is very friendly in normal driving conditions and the lag is minimal when his step on it... The testimony of Alpine (APS custumer) is more enougth to confirm that the turbo lag is not that big of a deal... so I believe that at this point is not a good judgement to say specifics things about this kit (speking in generaly)... but in the other hand I accept your opinion on a different kind of turbo with other specification to get better performance in mid range... but the fact is that rigth now is only a good susgestion... I could considered but I will have to test it in real life... I have to wait until December to see how this kit work on my car, I hope that with this kind of turbo it will be more than enougth for my needs of speed.

 

by the way Lazcano also uses a Turbonetics turbocharger

 

Hey I didn't know you guys are here
I spoke to Lazcano last week and his car with the new set up is coming out on March... 6 seg. here I come!

 

Yeah they have been on here for a while. They just dont post ***** like some people...and they certainly dont bag other manufacturers on here like the same people.

 

We have been involved with Lazcano for years...he is a force to be wrecked with. I was bummed to hear he wrecked the car but glad we was not hurt. I heard the new car is almost completed.

there are some more VQ racers coming out this next season, you will see 3 pro cars all crewed by George (formally Bullish
Racing) 2 belonging to Performance Motorsports and the third belonging to George himself all making numbers pushing the 2,000 mark and mid 6 second barrier and yes all with Turbonetics ball bearing turbochargers.

Performance Motorsports wil be one of our outlets for our single turbo systems both as a kit in a box or completly installed.

 

That are great news Brad... Hmm Lazcano have more competition this season... the important thing is that the 350Z's are coming after all mazdas and Toyotas in that class!!!

Btw My 350Z is going to be the first or one of the first that gonna have the Single Turbo Kit here in P.R. ... I'm very excited to drive that monster... any info that you know about the kit and JWT Cams, did you guys test it on a Z with Cams?

Thanks Brad!

 

Brad/Turbonetics,

I know you are being gentleman when it comes to Peter, but will you please respond to his comments on stock header failure. There are number of us that would like to see this topic put to rest.

Thanks!!!!

 

The information we have gathered to date is the stock manifolds are made of 409 double wall construction stainless steel. They were designed to withstand the heat, back pressure and weight generated from the direct mounted catalytic converters. Are they perfect? Probably not that’s why the aftermarket exist.

According to Nissan’s engineering and warranty departments there has been little to no action or claims regarding failures of stock exhaust manifolds since the release of the car and they fall under the 3 yr/36,000 mile warranty program.

By design we have moved the main source that other people are claiming will cause the manifolds to fail (the heat from the cats) away from the manifolds.

Brad

 

Hi Brad,

Wondering if you could shed some light on the below questions regarding your single turbo setup.

If compression is dropped to 9.0:1 how many revs/rpm would be required reach stock full boost?

If boost is increased to 4psi more than the standard setting how many revs/rpm does it take to reach full boost?

Any info is appreciated.