Vortech with (re)built short block (*long*)
I find it interesting that you went Aries 10.5:1 pistons as most go with 8.6:1 or so. Any reason why you choose this high compression? I was thinking of doing the same but with my APS ST, I can add more boost easily.
Originally Posted by beastie
I find it interesting that you went Aries 10.5:1 pistons as most go with 8.6:1 or so. Any reason why you choose this high compression? I was thinking of doing the same but with my APS ST, I can add more boost easily.
He's supercharged, therefore having higher compression will benefit him more due to the fact he can't turn up the boost like turbos can. SC need higher compression and turbo lower compression (if u want to boost more).
Originally Posted by kzanard
Dan,
If the "intake" is a CAI it will be removed when installing the S/C (if it is the plenum, then you are OK). The full Vortech kit comes with a secondary fuel pump, fuel management unit (FMU), and Split Second module for controlling the FMU and pump. If you get the "tuner Kit", these 3 items are missing and you need to have some other form of engine management for the unit. There is a ton of info on this and especially my350z.com and it can be overwhelming. Just take your time, read all of the posts, and get familiar with the terminology and options. Find a repuatable installer & tuner and pick their brains as well.
The 3.12 pulley (= 9psi) is about $70 and requires a new belt as well (another $40 or so). And you will definitely need a new tune with the 3.12 pulley as it will ad more air to your mix.
Find someone near you who has one so you can see, HEAR, and drive in it if you have not already.
~ Kevin
If the "intake" is a CAI it will be removed when installing the S/C (if it is the plenum, then you are OK). The full Vortech kit comes with a secondary fuel pump, fuel management unit (FMU), and Split Second module for controlling the FMU and pump. If you get the "tuner Kit", these 3 items are missing and you need to have some other form of engine management for the unit. There is a ton of info on this and especially my350z.com and it can be overwhelming. Just take your time, read all of the posts, and get familiar with the terminology and options. Find a repuatable installer & tuner and pick their brains as well.
The 3.12 pulley (= 9psi) is about $70 and requires a new belt as well (another $40 or so). And you will definitely need a new tune with the 3.12 pulley as it will ad more air to your mix.
Find someone near you who has one so you can see, HEAR, and drive in it if you have not already.
~ Kevin
Originally Posted by Dan_K
Do I need the secondary fuel pump, fuel management unit (FMU), and Split Second module for the vortech to work? Can use stock fuel pump?
You need a fuel managment system. Whether its a piggy back or not, you need something. The Vortech comes with the Split Second (SS) Box. If you get the tuner version, defiently go with something more tunable like emanage ultimate or something. The SS BOx has limited capabilities in the tuning (ie. every 500 RPM). I bought the full kit and had CP Race do the install / tune.
Go to my350z and go to the FI section there. You can learn a lot real quickly. Take your time and enjoy...
Last edited by g8tor20; Oct 18, 2005 at 11:10 PM.
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From: Quincy, MA
Originally Posted by Mr_pharmD
He's supercharged, therefore having higher compression will benefit him more due to the fact he can't turn up the boost like turbos can. SC need higher compression and turbo lower compression (if u want to boost more).
As Mr_PharmD states, a S/C is usually going to be at a lower boost so lower compression is not necesary in most applications. The main reason I went with higher compression is my car is driven mostly on the street and in traffic and I am not in the "boost range" (over 3500 RPM) that often in city driving. With lower compression there is less power when not boosting. I didn't want to lose any low end power. Turbos tend to spool up quicker and the lower compression is not as noticeable at low RPM's.
There are some guys that have pushed their Vortech to 12 - 15 PSI (with smaller pulleys and blower upgrade to T-trim) and they should (and do) use the lower compression pistons. I do not plan on boosting that high.
~ Kevin
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From: Quincy, MA
Originally Posted by g8tor20
You need a fuel managment system. Whether its a piggy back or not, you need something. The Vortech comes with the Split Second (SS) Box. If you get the tuner version, defiently go with something more tunable like emanage ultimate or something. The SS BOx has limited capabilities in the tuning (ie. every 500 RPM). I bought the full kit and had CP Race do the install / tune.
Go to my350z and go to the FI section there. You can learn a lot real quickly. Take your time and enjoy...
Go to my350z and go to the FI section there. You can learn a lot real quickly. Take your time and enjoy...
Dan, g8tor20 is right. Knowing what I know now, I personally would buy the tuner kit + a return fuel system (with bigger in tank pump) and emanage ultimate (or similar) management unit - especially if you plan on upgrading with other bolt ons or pulleys. This setup seems to be the most versatile. The SS box however is fine for most applications and is fairly straight forward in use, and is also tunable by yourself if you have a laptop and minimal computer skills (I would still recommend a dyno tune by a "professional" if you are not that confident- I know I wasn't confident enough!) .
Originally Posted by kzanard
Matt, you aren't kidding ("FINALLY")!
Definitely will be up for some area or mini-meets. I am trying to get the miles on as fast as possible. Took a nice ride down the Cape yesterday!
Definitely will be up for some area or mini-meets. I am trying to get the miles on as fast as possible. Took a nice ride down the Cape yesterday!
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From: Quincy, MA
Originally Posted by Dan_K
kanard - are you losing torque with the vortech down low compared to stock or is the gain under 3500 just really minimal?
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Originally Posted by Dan_K
Well, you shouldn't be losing anything at all below 3500, right? Please tell me it isn't so. I already feel like the G could use a lot more torque down low.
Not unless you go with lower compression pistons. Otherwise there will be no loss (same as stock) and only an increase when boost kicks in.
a.k.a. RANDYS_G
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From: Glen Rose, Texas
Originally Posted by kzanard
Thanks guys. It is great to be back.
We think it was the FMU. The weird thing was the SS program glitch. I am not sure if storing my car all winter (battery died) had anything to do with it.
Neff, you have PM.
~ K
We think it was the FMU. The weird thing was the SS program glitch. I am not sure if storing my car all winter (battery died) had anything to do with it.
Neff, you have PM.
~ K
Did you ever speak to Vortech about this? My installer had to send my SS box back because during install it was doing the same thing...turned out to be Vortech's fault...might want to look into that...
a.k.a. RANDYS_G
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From: Glen Rose, Texas
Originally Posted by Dan_K
What was the glitch?
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Originally Posted by Dan_K
What was the glitch?
I had my system for over a year and 4,000 miles with no issues. In that time I had at least 3 different tuning sessions on dyno for adjustments to A/F after initial break in and adding other components. After it was acting up in the spring and eventually died, when trying to diagnose the issue one of the mechanics tried to download the current SS program from the unit. I think several of the cell values wer missing or had corrupt characters. My only thought is that something happened to it over winter storage. It was in a garage for 4 months and battery was completely dead in the spring. SS box is supposed to be able to store it in memeory when power is cut, but I can't think of any other reason.