Man I dunno
#31
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#35
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#37
You really don't need any mods with an SC...maybe, just a new exhaust if you want a bolder sound. You'll have more than enough power without mods and will make the Vortech stock tune less safe. In particular, plenum mods are pretty worthless because under boost the slight difference in plenum height front to back is obliterated. The only reason to change the plenum under NA is to get more power, but you won't notice any significant difference with a blower attached.
Even with the blower, most of the time you are operating under vacuum where AFR is just about identical to stock NA. Therefore, cruising down the highway and any normal driving, you're at about stoich (14.7) most of the time. There's no reason for enrichment until boost happens. The moment you put the pedal to the metal, AFR drops right down, first to 14, then lower and lower as RPMs and boost ramp up. This results from a combination of the SS timing box, the FMU responding to boost in the vacuum system, and the aux fuel pump ramping up fuel pressure to the fuel rails. The timing box keeps it all smooth and linear and also retards timing in order to prevent detonation.
I was planning to get my car dynotuned, but it's running so sweet out of the box, I almost think it's not worth it and will only make the system less safe.
Even with the blower, most of the time you are operating under vacuum where AFR is just about identical to stock NA. Therefore, cruising down the highway and any normal driving, you're at about stoich (14.7) most of the time. There's no reason for enrichment until boost happens. The moment you put the pedal to the metal, AFR drops right down, first to 14, then lower and lower as RPMs and boost ramp up. This results from a combination of the SS timing box, the FMU responding to boost in the vacuum system, and the aux fuel pump ramping up fuel pressure to the fuel rails. The timing box keeps it all smooth and linear and also retards timing in order to prevent detonation.
I was planning to get my car dynotuned, but it's running so sweet out of the box, I almost think it's not worth it and will only make the system less safe.
Last edited by gersteinp; 03-08-2005 at 08:20 PM.
#39
The VQ35DE engine is very safe with 360 rwhp or less (about 410 crank HP). After that, if you don't go forged, you're taking a big risk. Just search the boards for all the engine failure stories. Get yourself a built engine, then you can run intake and exhaust mods and go with a smaller pulley. The only mods I'd recommend are big fat tires to put the power down to the pavement, and, maybe, a stronger clutch depending on how crazy you drive. I went with NISMO wheels and I'm waiting for spring to put them on. Just get your Vortech in for now and see how you like it as is, IMHO.
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#42
Originally Posted by G352NV
Randy did you do the spacer mod yet? Has anyone done it with the Vortech? I just put it on my car and I dont want to fug things up!
#43
APS update....
Today, 04:38 PM #405
APS
Registered User
Join Date: Mar 2004
Location: Melbourne, Australia
Posts: 270
The priority and total focus for the moment is the G35 Twin Turbo system, the testing should be completed by the end of March if all goes to plan .
Development and testing will then start on the single turbo system to suit the G35, if this proves to work as well as the APS single turbo for the Z car then I think it's very possible that a single turbo system will be released for the G35, I certainly hope so.
Thanks
Peter
__________________
Air Power Systems
Today, 04:38 PM #405
APS
Registered User
Join Date: Mar 2004
Location: Melbourne, Australia
Posts: 270
The priority and total focus for the moment is the G35 Twin Turbo system, the testing should be completed by the end of March if all goes to plan .
Development and testing will then start on the single turbo system to suit the G35, if this proves to work as well as the APS single turbo for the Z car then I think it's very possible that a single turbo system will be released for the G35, I certainly hope so.
Thanks
Peter
__________________
Air Power Systems
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