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Old 10-10-2005   #1
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How do you increase the fuel pressure on the 1108cc FIRE engine?

Thought I'd post this here as it may be relevant to Cinqs/Seis etc as well as Puntos...

The article on FIRE engine tuning in Retro Cars recommends "winding up the fuel pressure a bit" to increase power... unfortunately it doesn't mention how you would achieve that! Is there a regulator that I can adjust, or would I need to fit an uprated regulator or fuel pump?
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Old 10-10-2005   #2
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Re: How do you increase the fuel pressure on the 1108cc FIRE engine?

Quote Originally Posted by JonnyBoy
Thought I'd post this here as it may be relevant to Cinqs/Seis etc as well as Puntos...

The article on FIRE engine tuning in Retro Cars recommends "winding up the fuel pressure a bit" to increase power... unfortunately it doesn't mention how you would achieve that! Is there a regulator that I can adjust, or would I need to fit an uprated regulator or fuel pump?
Yea i think its a case of a new pump and regulator The spi systems only use a low pressure system. There may be some leway in the current pressure regulator though, im not too sure not having seen the system
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Old 10-10-2005   #3
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Re: How do you increase the fuel pressure on the 1108cc FIRE engine?

Quote Originally Posted by luke1985
Yea i think its a case of a new pump and regulator The spi systems only use a low pressure system. There may be some leway in the current pressure regulator though, im not too sure not having seen the system
Pete did say something a while ago but can rem what tbh
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Old 10-10-2005   #4
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Re: How do you increase the fuel pressure on the 1108cc FIRE engine?

You can drop a Punto 75 pump in the tank. But you might encounter some problems with the fuel line connectors if you use the Cinquecento sender unit to house the pump.
Alternatively you could use an external pump.
With the existing pump you would not be able to increase the power worth mentioning. If you can double the fuel pressure you will get not more than 40% more fuel in. Winding up the fuel pressure on the existing system is rather a myth.
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Old 10-10-2005   #5
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Re: How do you increase the fuel pressure on the 1108cc FIRE engine?

What edition of retro cars featured the FIRE engine, i missed this one ????
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Old 10-10-2005   #6
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Re: How do you increase the fuel pressure on the 1108cc FIRE engine?

Quote Originally Posted by SuperUno
What edition of retro cars featured the FIRE engine, i missed this one ????
https://www.fiatforum.com/showthread...ght=retro+cars

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Old 10-10-2005   #7
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Re: How do you increase the fuel pressure on the 1108cc FIRE engine?

Since that thread is blocked, can i say thanks to the person who sacnned in the Retro cars piece on FIRE engines.

Now to test the works printer
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Old 10-10-2005   #8
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Re: How do you increase the fuel pressure on the 1108cc FIRE engine?

You could wind down the allen screw on the fuel pressure regulator inside the throttle body, but to do so without a pressure gauge and exact knowledge of what you want and need to do would be a bit pointless. To some extent the lambda sensor will just tell your ecu it's running rich and reduce the injector duration, negating any effects.

You're not going to gain much bhp by just making it run a bit richer, anyway.
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Re: How do you increase the fuel pressure on the 1108cc FIRE engine?

I was thinking along those lines, but wasn't sure. These Fiat engines seem too clever to be simply and cheaply conned into performing better
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