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Underbody braces, turbos and more!

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 Post subject: vovlo turbo swap
PostPosted: Tue May 18, 2010 4:53 pm 
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Joined: Fri May 14, 2010 7:55 pm
Posts: 33
Location: vancouver island
Whats a safe psi to run my G10t with out having to up grade the fuel system?

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My cars : heavily modified '88 vert RX7
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 Post subject: Re: vovlo turbo swap
PostPosted: Tue May 18, 2010 5:05 pm 
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Joined: Wed Aug 09, 2006 6:37 pm
Posts: 784
Location: Palmdale, Ca
I'd say 8-10psi but it depends on how well your 20+ year old fuel system still works. I was leaning out at 10psi but I had the original fuel pump that came on the car and at least one bad injector. To be safe put a wideband or even a narrowband and make sure it doesn't go lean.

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 Post subject: Re: vovlo turbo swap
PostPosted: Tue May 18, 2010 7:10 pm 
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Joined: Mon Dec 01, 2003 12:47 pm
Posts: 11675
Location: columbus, ohio
in my case, 10 psi was about all i could get the factory electronics to handle without help.

i rigged up a hobb's switch that switched on the cold start injector at 10psi and that was pretty stable up to 15 - 16psi for short blasts. it was pig rich around 12psi like that and got too lean around 18psi (for as long as that lasted, i spun the compressor wheel off the rhb32 at that point after the bov operated twice. :razz: )

the factory electronics aren't terribly good for cranking the boost up with. the vaf is the absolute pits to try to use above 12psi. the gate and variable resistor it's mechanically coupled to are right on the upper limit and that's what sets up the injector duty cycle. when your mass air flow is at the upper measurable limit and the injectors are balls to the wall, there's no control of the fueling and the only thing the ecu can do is to dial off ignition timing advance.

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 Post subject: Re: vovlo turbo swap
PostPosted: Wed May 19, 2010 2:17 pm 
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Joined: Fri May 14, 2010 7:55 pm
Posts: 33
Location: vancouver island
Sweet good to know thanx guys!

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My cars : heavily modified '88 vert RX7
'78 fuel injected Volkswagen westfalia (for camping trips)
'91 Pontiac Firefly G10t


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 Post subject: Re: vovlo turbo swap
PostPosted: Thu Jun 02, 2016 1:16 pm 
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Joined: Thu Jun 02, 2016 1:12 pm
Posts: 1
Location: Kelowna, BC, Canada
Does anyone know if the flap style hitachi style mass air can be changed with one from a different vehicle? Id like to ditch the stock air box in favor of a cold air intake for the turbo, a flow through style would be much easier to accommodate.

Thanks!


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