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What should engine spec's be 350Z afr/vac/boost
 
Old 02-12-2008, 09:32 AM
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Default What should engine spec's be 350Z afr/vac/boost

Hi all,

I have an 05 350Z non-rev basically factory except the stage I kit. I'm looking for what the basic's should be so I can better monitor everything. I am using a wideband; innovate gauges.

1) Typical vacum @ idle

2) Max boost ; is 9.5-9.8 without any mods to the kit or car ok, not that I'm complaining but I want it to be right for the program?

3) What should the AFR be at idle; mine like to stick at 14-15

4) What should the AFR be under boost; mine sticks at 10.5

Secondly do you know if Turbonetics is going to produce a stage 2 kit? I'm thinking of doing a block and wanted to know if I could utilize any of the exisiting kit to get around 650WHP upgrading whats neccesary.
I've heard the downpipe is a bottle neck over 10psi??Back pressure issue's??

I appreciate any feedback
Thanks,
Shep
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Old 02-12-2008, 10:44 AM
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Default Re: What should engine spec's be 350Z afr/vac/boost

Quote:
Originally Posted by Shep
Hi all,

I have an 05 350Z non-rev basically factory except the stage I kit. I'm looking for what the basic's should be so I can better monitor everything. I am using a wideband; innovate gauges.

1) Typical vacum @ idle

2) Max boost ; is 9.5-9.8 without any mods to the kit or car ok, not that I'm complaining but I want it to be right for the program?

3) What should the AFR be at idle; mine like to stick at 14-15

4) What should the AFR be under boost; mine sticks at 10.5

Secondly do you know if Turbonetics is going to produce a stage 2 kit? I'm thinking of doing a block and wanted to know if I could utilize any of the exisiting kit to get around 650WHP upgrading whats neccesary.
I've heard the downpipe is a bottle neck over 10psi??Back pressure issue's??

I appreciate any feedback
Thanks,
Shep
1. Vacuum should be roughly 20-25 in/hg
2. Max boost should be 8-8.5 if you tapped the boost signal in the right spot
3. 14.7:1 or close to it
4. 11:1 is the typical but if the car is all stock and you are running on anything better then the 91 crap we have in Cali you might be a little richer. 10.5:1 isn't catastrophic

Stage 2 is still being discussed. I can tell you there are shops out there making well in excess of 500 WHP with the Stage 1 kit and a wastegate swap..
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