Well I ended up buying a aps extreme TT kit but now i am not sure what I am gong to do.

I currently have a CJM Stage 1 fuel system with a walbro pump. But as you all know the APS Extreme comes with its own fuel system including the dual fuel pumps which I will certainly need.

Ive read in various threads (Nitrouz's 420z thread in particular) that the APS fuel system was kind of sub par. Should i just sell off the APS Fuel kit and but the CJM Stage 1,2 and dual pump hanger when ever it comes out? or should I just sell the CJM Stage 1?

Any input will be appreciated

 

i would either upgrade to a CJM Stage 3 or use the APS Extreme Fuel System..

a dual pump setup is a dual pump setup.. though the design and workmanship of the CJM Stage 1 and 2 is better than teh APS.. its still a Single Pump design vs Dual Pump design..

the APS will still be better than the CJM 1/2 .. the question to you is.. which is more cost effective? Selling your Stage 1 and modifying your APS to work properly? or Selling your APS and upgrading to Stage 3

 

I guess that depends on what your power goals are... What are they?

 

If you already have it just keep it...
its not like youll be 800whp daily driving anyways

 

i think id like to see high 600s low 700s on high boost, c18 and a good tune. idk what the aps fuel system is good for though

 

if you want to get things done soon then i would say keep the aps and sell the cjm but if you have the patience then wait for the cjm dual pump hanger. but remember, the cjm stage 3 will need to be modified also with addition parts i believe.

 

The APS extreme fuel system will be just fine for that.

 

and using the provided APS injectors too... no need to upgrade those
Nitrouz maxed them out and got over 750s i think

 

hmm i thought he was maxing them out at mid 600s because they were "880" injectors but they were more like 600 something ccs because they were rated 880 at 4 bar

 

just FYI since its being brought up here, the CJM dual pump assemblies are available now. We just are not pushing them very hard because production on them is going somewhat slow at the moment, and more of them are spoken for than we can make for the next couple weeks. Currently, we are waiting for our shipment of walbros so we can assemble the units that are already done and spoken for. I am also at the shop right now, machining parts for the next batch.

 

to answer your question, first thing i would do if i were you is find out if APS fixed their siphon/fuel pressure issues.

First they had a problem with their transfer siphon not working properly, and then their fix for that was to press a little jet into the inlet of the siphon to increase velocity... in turn it was very restrictive on the return line and provided for big time pressure spikes at idle and cruise. its been some time now, they may have worked this out.

 

^ good info....subscribing.

 

FYI you can subscribe to threads by going to "thread tools"

you do not have to make a post... just letting you know.

 

IK..just showing my appreciation at the same time...

 

I would really like to hear what Nitrouz has to say about this

 

I would say exactly just that. That was the problem I had. Make sure the siphoning issue has been worked out. But it's not easy to find out, because 1, you can't trust what APS says because of course they would say it's fine, and 2, APS emails most if not all the shops to shut them up about the issue.

If it was me doing it all over again, I'd just do the CJM. When you are going this big, you really don't want to limit yourself due to a little injector problem, then having to swap injectors, then find out you have to change the rails because the APS ones are too low to fit any other injectors, etc etc...