Stock manifolds for S/T?
Stock manifolds for S/T?
I really like the idea of the single turbo (APS nearly went down the same path until we realized that CARB approval was not possible) though your comments regarding the stock manifolds not being subjected to heat and stress is simply not correct. 
The stock 350Z manifolds are subject to the identical thermal and stress loads as any turbocharged engine and in fact would be more likely to fail prematurely as the cast iron for N/A manifolds applications is of a very different specification to that of cast turbo manifolds (turbo manifolds are cast in a ni Resist iron with very high nickel content approx 45% nickel and designed to cope with extreme exhaust gas temperature of around 1800 to 2000 F).
Exhaust manifolds on N/A engines are designed to cope with exhaust gas temperature of around 1400 F.....................N/A manifolds when ustilised in a turbo application are going to fail for sure..............it's simply a question of when not if.
Please don't take the above comments as criticism as this is not my intention and I believe that the single turbo approach is a very viable option if engineered to the required standard............it's just that the stock nissan manifolds will not cope (will fail it's only a question of time) with the high exhaust gas temperature in a turbocharged application.
Peter
APS
The stock 350Z manifolds are subject to the identical thermal and stress loads as any turbocharged engine and in fact would be more likely to fail prematurely as the cast iron for N/A manifolds applications is of a very different specification to that of cast turbo manifolds (turbo manifolds are cast in a ni Resist iron with very high nickel content approx 45% nickel and designed to cope with extreme exhaust gas temperature of around 1800 to 2000 F).
Exhaust manifolds on N/A engines are designed to cope with exhaust gas temperature of around 1400 F.....................N/A manifolds when ustilised in a turbo application are going to fail for sure..............it's simply a question of when not if.
Please don't take the above comments as criticism as this is not my intention and I believe that the single turbo approach is a very viable option if engineered to the required standard............it's just that the stock nissan manifolds will not cope (will fail it's only a question of time) with the high exhaust gas temperature in a turbocharged application.
Peter
APS
I came across this old quote from APS while researching my FI options. Now, please forgive me if this has been covered before, but doesn't the APS S/T kit use the stock Nissan manifolds? What has changed since this post to make the stock manifolds suitable for FI now? I'm concerned because up until I read this post, I was almost 100% for going with the APS S/T kit as soon as it came out.
Originally Posted by ccartwright
I came across this old quote from APS while researching my FI options. Now, please forgive me if this has been covered before, but doesn't the APS S/T kit use the stock Nissan manifolds? What has changed since this post to make the stock manifolds suitable for FI now? I'm concerned because up until I read this post, I was almost 100% for going with the APS S/T kit as soon as it came out.
Originally Posted by ccartwright
whew....
That's good to hear, thanks Miaplaya!
That's good to hear, thanks Miaplaya!
Originally Posted by uplz4588
so MIA what kinda power you getting w/ the turbonetics? and what RPM do you see full boost? i havnet seen anythreads about it installed... only one i know of is yours...
I second that...its hard to decide which kit to buy when all I know of is one install........
Originally Posted by redline350ZZ
I second that...its hard to decide which kit to buy when all I know of is one install........
Hopefully in the next few weeks we'll get some unbiased reports (if the kit is actually selling).
MIAPLAYA has done a great job so far relaying all the info he can (awesome videos, pics, etc), but you can't really say he's a neutral source.
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Max boost @ 4000rpm with a 6600rpm redline = 2600rpm of full boost action.
When do the twins reach full boost? Around ~2300rpm??? (anyone know?) = 4300rpm of full boost action.
When do the twins reach full boost? Around ~2300rpm??? (anyone know?) = 4300rpm of full boost action.
Last edited by mchapman; Apr 4, 2005 at 10:24 PM.
Originally Posted by MIAPLAYA
I'm making 386 RWHP at 8 PSI with 11:1 AFR from boost to redline. Full boost is at 4k rpms. (HP numbers are a Dynapack number)
Congrat's on the numbers.... Looking forward to the Dyno Pictures...
any word on CARB certification?
Cheers Amy
- I guess the latest change in the smog law's are good news to you.
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Originally Posted by ccartwright
I came across this old quote from APS while researching my FI options. Now, please forgive me if this has been covered before, but doesn't the APS S/T kit use the stock Nissan manifolds?
Originally Posted by ccartwright
What has changed since this post to make the stock manifolds suitable for FI now? I'm concerned because up until I read this post, I was almost 100% for going with the APS S/T kit as soon as it came out.
With this in mind APS is already developing a set of special turbo exhaust headers from a high grade stainless steel for the guys who will no doubt find the durablility limit of the stock exhaust manifolds over time, these will be available as an option in the not too distant future.
Peter
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From: Australia
Originally Posted by redline350ZZ
Peter any time frame before we as customers can see an online install guide for the S/T kit.....??
There will be several new pics and more detailed information on the APS web site within the next 24 hours, I trust you will find this info very interesting.
These new pics will provide you with a good deal of information as to the ease of the APS single turbo fitment and will also go a long way to show you guys how not to over complicate a single turbo conversion, all good.
Peter
I have a question about aftermarket headers...
I currently am running the Pro-1 Topspeed headers on my car (an Auto G35) and I'm about 99% sold on your kit - how would these headers change the output of the kit? I still have the stock manifolds, so if it's recommended that I go back to stock, I have that option... what do you suggest Peter?
I currently am running the Pro-1 Topspeed headers on my car (an Auto G35) and I'm about 99% sold on your kit - how would these headers change the output of the kit? I still have the stock manifolds, so if it's recommended that I go back to stock, I have that option... what do you suggest Peter?
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