http://www.************************/350z/g35/g35.htm

 

Twin turbo, here I come.

 

what gear was this dyno done in?

 

Note - stock catalytic converters fitted & 4th gear (industry standard for the Infinity/350Z) power run.

 

I thought industry standard is 5th gear..

but anyway, 4th gear dynoes are slightly lower than 5th gear dynos so that's probably a conservative approach anyway.

 

don't get too worried about what gear it was in, there are many other factors that can change the results... "real" dynos are able to produce a computer controlled load and compensate for this load in the hp/torque measurement...

the SAE standard for measuring hp mandates that a horsepower "pull" must accelerate at a rate of 300rpms/second... so if you pull from 3000-6000, it MUST take 10 seconds... if it does not, you aren't measuring SAE horsepower... because the dyno adjusts its load accordingly so that the pull will occur at this rate, the gearing has very little effect... 1st gear or 4th gear, 100hp or 1000hp, to go from rpm X to Y it should take the same amount of time... this is necessary because all vehicles/motors will register more power as the pull gets slower... in fact some "cheaters" will start a pull at redline and have the dyno load so high that it pulls the motor back down to 2000rpms... this gives the highest numbers but obviously doesn't represent any real world conditions (unless you use your Z/G for tractor pulling)...

of course these more sophisticated dynos (again pretty much anything but a dynojet) that can perform these types of pulls usually have a "vehicle simulation" mode where they take into account the vehicle's weight and coefficient of drag... they then increase the load as tire speed goes up to simulate real loads when driving... under these conditions you will have slight variations in power from gear to gear as well...

but the bottom line is dyno "A" could be set up to produce the same load in 2nd gear that dyno "B" produces in 4th gear... this was drastically change the spool rpm of the turbo and it will mildly change the power numbers...

note, i'm not implying that APS has set up their dyno in any kind of non-standard way... I'm simply saying that to accurately compare dyno A to dyno B you need to know a heck of a lot more than just what gear the cars were running in...

APS - if a person bought the 350Z TT kit, could they then just add that other part number for the G35 fitment kit and install it on the G? Are the core pieces like the manifolds, turbos and intercooler the same between both platforms?

Jeff

 

quote from peter on G35driver.com, I was basically asking if the 350Z APS kit is the same as the G35.

You've got it in one, the APS dealers will only require the supplementary G35 parts if they have the 350 Z Twin Turbo System in stock. This keeps the cost of inventory to a minimum for APS dealers.

In addition this design also provides future flexibility if you decide to sell your G35 as the APS Intercooled Twin Turbo system will suit either the G35 or the 350Z. This doubles the potential market when selling if you choose not to leave the TT system on your G35

 

Yeah it has me thinking too! Say I get $3000-$3500 for my Vortech.....$7500 for the APS TT plus $2500 for install = only $6500 out of my pocket. The thing about it is if I dump $6500 more into the car, I would want to be around 460rwhp. I have 380hp now and can't justify $6500 for 20-30hp more. I know it can be tuned for more but there not that many tuners for this kit......so it would probably stay with stock settings.

 

I'm no expert here but I think there is a little more to it than just 20-30hp. Max boost on the APS system kicks in at 2500rpm as per their website. From what I understand maximum boost on superchargers on these cars come in at the 4-5k rpm range, I assume that would make a significant difference, moreso than horsepower.

 

Correct, the base APS 350Z Intercooled Twin Turbo system with a supplementary G35 fitting kit fits the G35 coupe perfectly, all good.

Thanks

Peter

 

Thanks for your post, I has not seen your post when I replied earlier.

Peter

 

Significant enough for $6500? DFW on this board has a 404hp/316ft/tq vortech g...he best 1/4 mile was 12.706. Let's say this APS TT gets you down to 12.3....just not enough difference for me to shell out the money. If I hadn't already bought my vortech and spent the money to install and tune, then I'd be all over it, but I am just ing money out the window with this car.

 

What fuel octane do you have available as up to 500 WHP is possible from the base APS intercooled twin turbo system (the APS TT fuel system will suport up to 500 WHP) though I would recommend a con rod upgrade if you upgrade to this 500 WHP power level.

The other issue worth considering is the APS twin Turbo system will not only yeild much higher peak power it will also deliver much stronger torque and power in the low to mid rpm range compared to that of a Centrifugal Supercharger.

If you need a special tuning map Tuan from GRD in Chicago can help out, it's only a matter of you shipping the APS computer to GRD.

Thanks

Peter

 

I have 93 available. To be at 460whp or so I would take the plunge. I'll just tell the wife, I dropped the car off for maintance. If she knew I was going to sell my s/c after only having it a couple weeks so I can buy a TT set up she would


Could Tuan set up a 460ish whp map by shipping it? This could help me reconsider. I don't want to build the motor. I will push the limit and cross my fingers. If I have to build later because of a blown rod then oh well...more ing out the window.

 

460 WHP is no problem at all for the APS TT system, all you need is low back pressure TD exhaust system with APS test pipes and the correct tuning map from Tuan to suit 93 octane fuel.

If you get a chance send Taun from GRD an email or pm, I'm sure you will find him both very helpful and knowledgeable.

A word of warning though, I not suggesting that the stock con rods will live at this power level for extended periods of time and I recommend that you do not raise the stock rpm limit, this is the quickest way to fail a con rod imho.

Thanks

Peter

 

If you had to take an educated guess, what do you think would be the highest power level (other than the map the kit brings) you could run on the stock motor before things start flinging?

Thanks for all the info!

 

I would not like to go above 450 WHP even though we have been at over 500 WHP on the stock VQ engine on 93 octane fuel, there are just too many possible variables in high volume production engines that are out of our control.

I still believe that if you keep the engine rpm at the stock limit than there's a very good possibility that the engine will stay together at this high power level for a reasonable time period, (of course this somewhat depends on the driving conditions, not circuit racing) used as a street car and at the drag strip occasionally.

Happing boosting.

Peter

 

I know this is all speculation for now, but I'm wondering if you're expecting significant gains from the tall-boy plenum as it pertains to FI applications? Also, are you using the stock spark plugs with the testing you guys are doing?

 

gman2004 I just picked up my car with APS TT installed.I couldn't play to much with all the rain.I will have the car on the dyno next.I had tuan reflash the unichip for 93 octane.By the way if you call roger at Japtrix 561-963-8700 I'm sure you would be surprised at the price of the install (cheaper than $2500).They are a class act and very miticulous(spelling?)with there install.I would recomend them to anybody to install this kit.With that said this car is a animal now.WOOOOHOOOO!!!!!!
P.S.If you come to the sunday cruise SFZCC I'll be there with my new baby.


Jeff

 

Sounds great! I guess I have about 3 months to think this over. I am sure I will go back and forth several hundreds times before then. Maybe I will post a feeler in the classifieds for the Vortech