NS Dev
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| posted on 16/3/06 at 08:48 AM |
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Fuel Pressure, VX injection
Anybody know what the std fuel pressure reg is set to on a cavalier 8v sri, and is it the same as the 16v fuel pressure?
I'm guessing so, but just wondered if anybody knew?
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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NigeEss
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| posted on 16/3/06 at 09:02 AM |
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IIRC from my old SRi130 it's 2.5bar or a shade over 36psi.
Wouldn't have thought a 16v would need to be different.
Nige
[Edited on 16/3/06 by NigeEss]
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britishtrident
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| posted on 16/3/06 at 10:09 AM |
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Best way is to measure it -- istr its the same basic type as Rover use easy to fiddle for more pressure take it off use a couple of sockets and a
vice to depress the top of the can a couple of mm
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NS Dev
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| posted on 16/3/06 at 10:23 AM |
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yup, that's the idea, penny pinching me! Just that aftermarket pressure regs were slated by my rolling road man, he reckons the only ones that
hold pressure dead smooth are OE Bosch ones and Weber ones.
The cavvy 8v Bosch one is neat and will fit the job and I have one handy. I'm hoping to get the fuel pressure close to what I run on my other
engine so I don't have too much peeing about to do with the mapping.
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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nre
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| posted on 16/3/06 at 10:39 AM |
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I've just got an Astra GTE pres reg for my TB conversion, did some googling using the part number last week and confirmed it was a 2.5bar reg,
and I believe it's the same as the Cav one. P/N on mine is 280 160 202.
I may need to up it to 3bar or so (not exactly sure what my injectors flow at the moment) so will be interested to hear the outcome... Had heard
about the squash it in a vice trick before...
Cheers,
Neil
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rusty
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| posted on 16/3/06 at 11:09 AM |
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C20XE 16v in an astra is 3bar with the vacume pipe disconnected ie the basic regulaor pressure but with a worn spring and the vacume pipe on at idle
it drops down.
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mat.price
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 posted on 16/3/06 at 05:10 PM |
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i have a red top cav and that about 2.7bar to 3bar feed and 2.2 return
hope this helps
matt
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chriscook
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| posted on 16/3/06 at 05:44 PM |
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NS Dev,
Who's your rolling road man?
Ta,
Chris
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NS Dev
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| posted on 17/3/06 at 02:17 PM |
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One of two, the one who passed comment is Steve Walford, SW Motorsport in birmingham. I know him as I race with him in grasstrack.
My "local" one is John Wilcox in hinckley.
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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MikeRJ
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| posted on 17/3/06 at 05:42 PM |
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quote:
Originally posted by rusty
C20XE 16v in an astra is 3bar with the vacume pipe disconnected ie the basic regulaor pressure but with a worn spring and the vacume pipe on at idle
it drops down.
That depends on the injectors fitted. The earlier engines had cream coloured injectors running at 2.5 bar, the later ones blue injectors at 3 bar
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