This is the piece I would like to see the inside of...

 

 

Any better/upclose pics of the turbo side of that piece? Or could you tell me if it is sectioned to seperate the waste gas flow? My thought is it wouldn't matter even if it was due to the short length of the piece prior to being merged at the downpipe but I'm sure every little bit would help. When the wastegate opens its going to disrupt the exhaust gas flow from the turbo if its not. Not sure how much of an impact this would have on temps in that area but it might be something to try.

 

Also does anyone have any compressor maps for the GT turbos used on the APS kit. And for that matter a map for the IHI turbos from the PE kit. It owuld be interesting to plot the efficiencies for all the different turbos offered for the Z.

 

You do realize the APS turbo's have internal wastegates right?

 

Yes I do...that doesn't mean you can't seperate the flow from the two gas outlets and merge them further downstream to decrease temps from cramming them together in one tight location and also prevent turbulance from the wastegate opening in the same location as the exhaust outlet and causing a slight increase in backpressure and thus an increase in exhaust temps. That was the whole principle of the design I linked.. Like I said on this particular application it probably would not do much but I was just curious. This design does not have as an extreme an angle on the downpipe as the one I linked but I'm sure it wouldn't hurt either.

 

it would be simple for you to weld a divider in there but i would personally just leave well enough alone... the kits are not having any issues with boost creep and they are making great power... i dont think i would bother.

 

Yeah like I said for this application it probaby would not make a difference but I just wanted to see if it had already come like that. Just curious..

 

good stuff

 

no they do not come like that. i also highly recommending NOT welding in a divorce plate. the APS downpipe adapters are very poor castings, in the fact that they are very porous. a weld will not penetrate properly and will probably crack them.

 

yes welding to cast is not something you typically do but if you use the right rod and do it right you can get a decently reliable weld... i would figure if anything the part you weld in could crack out but of no consequence.

 

Ahh IC...I was not aware. Thats kind of why I wanted a pic of the inside to see what it looked like. Although I agree that the welding could be done you are probably right as far as not doing it for reliability reasons (of the weld). It was just a thought either way. I like to look at things like that in each kit..as I'm sure phunk and you and several others do.

 

Hey phunk a really good post and many thanks for your valueable input, I agree with nearly all of the comments you made other than this point.

I reckon you need to run 2 identical Z cars with the same tire diameter, tire pressure, wheel weight, environmental conditions, fuel octane, and turbo boost pressure before drawing any conclusion on which makes more power at 9 PSI boost pressure.

For most guys I believe that the Horsepower across the entire rpm range (not just peak power) is more relevant in a daily driver than the peak power figure, what do you think?

Happy Xmas Phunk

Peter

 

In short the answer is no.

The APS/Unichip can map the 6 injectors in the stock nissan factory position and the 6 aux injectors located in the APS tall boy plenum (total of 12 fuel injectors) across all load and RPM sites.

APS has used this fuel system approach on many other turbo projects. The 6 aux injectors also help to reduce charge air temperature with this fine mist of cold fuel in the charge air stream...............just another small benefit for big power Z engines.

Peter

 

WOW

You have no idea how exciting it is for me to hear that. I have been told there is no way big HP numbers can be achieved with a "piggyback" system so I have been looking into a standalone solution. The 900hp fuel system upgrade with tall-boy plenum is going to save me big bucks to say the least!

 

achieving big HP isnt the task, achieving quality big HP is the task. As I previously said I trust that APS engineering will do this correctly... but you should never get to excited by an object until it is tangible.

Peter: I have a built motor APS car here... how soon will your fuel system be available? Perhaps the owner of the car would be interested in giving it a shot.

 

If the upgraded fuel system is good for 900hp then I asume it would do well at 600hp and thats good enough for me

 

Does anyone have flow charts on the APS turbo, PE turbo, and Greddy turbo???

 

Someone posted the Greddy flow charts a while back but ditto on the others...

 

[QUOTE]Originally posted by MIAPLAYA
Does anyone have pics of the turbo downpipes that APS used. I'd like to see if the waste gas from the integral wastegate was routed in a seperate pipe and then gradually merged...

Kind of like this....



[/QUOTE



Their new single turbo kit has the divorced wastegate you were talking about.

http://www.airpowersystems.com/350z/.../it_system.htm