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Location:
Auckland, New Zealand
Registered:
July 2002
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4A-G/GZ Fuel Press Regulators
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Mon, 12 August 2002 01:16
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I've got a GZE block and I'm using a RWD 4A-GE Fuel Rail (runs the same press as GZE, 2.55kpa).
I've cureently got the GZE pulsation damper on it...
will that work?
what the hell does a pulsation damper do anyway?
and...
would a FPR from a Red Top (2.9kpa) work?
I hope this makes sense to someone.
Help would be much appreciated.
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Location:
Bundaberg, Qld.
Registered:
May 2002
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 Re: 4A-G/GZ Fuel Press Regulators
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Mon, 12 August 2002 11:59
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 i'm trying to find out more about using the ge regulator on the ze. i had to use the ge feul rail with my turbo conversion, so i had to use the ge regulator (as the ze one mounts differently)
you state in your post that they both run at the same pressure??
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Location:
Canberra
Registered:
May 2002
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Re: 4A-G/GZ Fuel Press Regulators
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Mon, 12 August 2002 12:09
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they may run the same base pressure (zero manifold vacuum) but I would say that the GZE then increases pressure above zero manifold vacuum to compensate for supercharger boost, same as any other factory turbo or supercharged car.
sounds like you've both done the same turbo GZE conversion that i'm doing at the moment. I will be interested to see what i'm up for!
why cant you use the GZE fuel press reg on the naturally aspirated GE rail? I've got three types of rail here, and the GZE reg fits all, its just at the opposite end of the rail.
Cheers
Phil.
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: 4A-G/GZ Fuel Press Regulators
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Mon, 12 August 2002 12:38
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i havnt actually finished mine yet........
funny what you say bout your regulator, doesnt mount on my ge rail????
i have a page on my site that has a few pic's of what i've done so far,(plus a bit more cause i havnt put the latest photos on there)
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Location:
Canberra
Registered:
May 2002
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Re: 4A-G/GZ Fuel Press Regulators
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Mon, 12 August 2002 12:50
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man! You aint got much room in that engine bay! It makes my T18 look like a valiant!
the other rails that i tried the ZE regulator on were both 88kw big port motors, one FWD, one RWD. perhaps the 100kw rails are different, and do not fit the ZE reg.
obviously you cant use the ZE rail for some reason? is it the GZE head that you're using?
Phil
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: 4A-G/GZ Fuel Press Regulators
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Mon, 12 August 2002 13:18
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ummmmm.........
the ge i have (the old motor)is a 88kw big port, but the ze regulator wouldnt fit on it's feul rail.
i am using the ze head, complete ze motor, just took all the stuff not needed, and put all the stuff on for the turbo.
when you put a ge inlet manifold on (mine had t-vis) you need to use the t-vis block(gutted of the butterflies) if you want to use the ze feul rail, as the brake booster pipe hits on the feul rail. i didnt use the t-vis block, so i had to use the ge feul rail.
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Location:
Auckland, New Zealand
Registered:
July 2002
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Re: 4A-G/GZ Fuel Press Regulators
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Mon, 12 August 2002 20:18
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Ok Chaps
I could use GZE FPR on the RWD 4A-GE Fuel Rail, but it has the long copper hose on it.
I am using GZE block
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Location:
Canberra
Registered:
May 2002
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Re: 4A-G/GZ Fuel Press Regulators
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Mon, 12 August 2002 21:41
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yeah, same deal for me, i got GZE block, 88kw RWD head, manifold & rail, GZE reg, and I think the copper pipe you are talking about is the one that bolts to the bottom of the reg with a banjo fitting. I have just replaced this with a conventional banjo with a barbed fitting for EFI hose, so i can point it backwards (i relationship to the manifold) to run the hose back & under the manifold.
The damper is just there to attempt to soften pulses in the fuel rail when the injectors open, to keep a constant fuel pressure rather than fluctuating. some cars can get away without it, others, like the shite holden V6's suffer so bad that they actually extended the fuel hose to the rail to try and dampen the pulses further. many 'performance' oriented cars have the damper removed, replaced with just a normal inline fitting. I imagine the damper could be a restriction for fuel flow on big hp engines.
Phil
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: 4A-G/GZ Fuel Press Regulators
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Mon, 12 August 2002 23:10
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i used the feul lines that come with the ge feul rail, the ze injectors, the lines look virtually the same size.
but what i need to know is, will the ge reg work propely at boost??, cause i should have the boost by saturday.
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Location:
Auckland, New Zealand
Registered:
July 2002
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Re: 4A-G/GZ Fuel Press Regulators
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Mon, 12 August 2002 23:14
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Not sure on that one.
Guess you'll find out on Saturday 
How much are rising rate fpr's worth?
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: 4A-G/GZ Fuel Press Regulators
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Mon, 12 August 2002 23:21
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yeah i guess i will........ 
the old HKS turbo kit for the 4age never changed the regulator as far as i know, so it should be ok....
as for the rising rate reg, cant help ya sorry.
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Location:
Eskilstuna, Sweden
Registered:
May 2002
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Re: 4A-G/GZ Fuel Press Regulators
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Tue, 13 August 2002 08:28
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Hi Guys,
I am finding this thread very interesting. Just to clear somehting up in my own mind (maybe a little off track). Does everyone who has built a 4AGTE use the 4AGZE block (which makes perfect sense) but not the ZE head?
Why is that, why use a Red top or blue top head? Is it due to the use of a factory inlet manifold not going on the ze head (other than the ze post supercharger inlet gear)?
Thanks guys, would love to know the details of your set-ups
youngy99@hotmail.com
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Location:
Auckland, New Zealand
Registered:
July 2002
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Re: 4A-G/GZ Fuel Press Regulators
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Tue, 13 August 2002 08:47
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I am using early GZE block & Head, so the head is large port already hence a blue top intake manifold bolts up (without the tvis plate and some new bolts of course).
I hope this helps
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Location:
Canberra
Registered:
May 2002
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Re: 4A-G/GZ Fuel Press Regulators
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Tue, 13 August 2002 09:29
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I've got a later model GZE block, with small intake ports in the head, so the RWD manifold doesnt fit, hence why i use a blue top 88kw head.
is anyone CERTAIN that the compression ratio changed from 8 to 8.9:1 at the SAME TIME as the large port to big port change??
how can i tell what compression mine is?
do you know what colour the ceramic coating is on the 8.9:1 models?
Phil
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: 4A-G/GZ Fuel Press Regulators
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Tue, 13 August 2002 09:30
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i am using the aw-11 4agze and head and a aw-11 88kw ge inlet manifold, not sure why people put small port heads on, big port is best for boost as far as i'm concered (more flow) (ze head), i know a lot of people in the states are putting the cams out of the ge heads into the ze head (higher lift and longer duration)but are not changing the heads, i havnt done the cam swap but, i do have them sitting on my bench.
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Location:
Eskilstuna, Sweden
Registered:
May 2002
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Re: 4A-G/GZ Fuel Press Regulators
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Tue, 13 August 2002 13:19
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I appreciate your replies guy and I hope this does not drag it out too much.
But if the later model ZE (based on the info I gleemed from here: http://home.clear.net.nz/pages/phil.bradshaw/4AGE% 20into%20RWD.htm#Specifications) used the small port head you would have to get a cut and shut inlet manifold from a red-top huh.
How much of a difference does the big-port vs small port (no not this again) head make in a forced induction situation?
Thanks guys once again.
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Location:
Auckland, New Zealand
Registered:
July 2002
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Re: 4A-G/GZ Fuel Press Regulators
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Tue, 13 August 2002 20:17
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If you use the late GZE then yes you do need the Red Top manifold to cut and shut, as Steve has done @ turbocorolla.com
The way I see it is.. you either go for the early or the late block because of the following...
Early
Largeport head
CR 8.0
Late
Smallport head
CR 8.9
Apparently the late block is better off boost due to the smallport head and the high comp ratio.
I've heard that some people say the 20V head is really good too (in a turbo situation), but I personally don't believe it.
I think the article written by Michael (http://toymods.org.au/4A-GTE) is a gem.
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Location:
Eskilstuna, Sweden
Registered:
May 2002
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Re: 4A-G/GZ Fuel Press Regulators
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Tue, 13 August 2002 22:17
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That really is a gem of an article!! I did not know it existed, thanks for the reminder.
Youngy
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