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Discussion Starter · #1 ·
Well guys, it looks like I'm finally out of the garage and on the road! Let me tell you about power. Any gear, any rpm, press the pedal and the car just flies, pressing me against the back of the seat! This is fantastic power, I just can't believe how much stronger this engine is than other Z's I've driven. And the sound, the glorious sound of driveline tunnel glasspack into a glasspack monza tip! Whew. Ok, I'm better now. hehe

I now have a REALLY clean fuel system!
I took all of the injectors down to a place that flow benches them, cleans them ultrasonically, replaces the filter baskets, the pindle caps and the o-rings and then re-benches them. They are flowing well now.

-How many cc's should stock injector's flow? I suspect the injectors I have are not stock but the only way to find out is to know the flow, right?

I went to Home depot and got a Pressure Gauge designed for 100psi, a brass T and two barb-tip connectors. I plan on installing this contraption on my fuel line just after the fuel filter. Should give a good indication of pump, regulator and filter status over time.

-Can anyone give me a good reason why this would or wouldn't work?
 

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Re: My car runs like a big scalded cheetah! (more.

> Well guys, it looks like I'm finally out of
> the garage and on the road! Let me tell you
> about power. Any gear, any rpm, press the
> pedal and the car just flies, pressing me
> against the back of the seat! This is
> fantastic power, I just can't believe how
> much stronger this engine is than other Z's
> I've driven. And the sound, the glorious
> sound of driveline tunnel glasspack into a
> glasspack monza tip! Whew. Ok, I'm better
> now. hehe

> I now have a REALLY clean fuel
> system!
> I took all of the injectors down to a place
> that flow benches them, cleans them
> ultrasonically, replaces the filter baskets,
> the pindle caps and the o-rings and then
> re-benches them. They are flowing well now.

> -How many cc's should stock injector's flow?
> I suspect the injectors I have are not stock
> but the only way to find out is to know the
> flow, right?

> I went to Home depot and got a Pressure
> Gauge designed for 100psi, a brass T and two
> barb-tip connectors. I plan on installing
> this contraption on my fuel line just after
> the fuel filter. Should give a good
> indication of pump, regulator and filter
> status over time.

> -Can anyone give me a good reason why this
> would or wouldn't work?

is that guage rated for air as well as liquid? i.e. was it in the power tools section around the air compressors??
 

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Discussion Starter · #3 ·
The plumbing section

> is that guage rated for air as well as
> liquid? i.e. was it in the power tools
> section around the air compressors??

It's designed to measure water presure
 

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Re: My car runs like a big scalded cheetah! (more.

> -How many cc's should stock injector's flow?
> I suspect the injectors I have are not stock
> but the only way to find out is to know the
> flow, right?

> I went to Home depot and got a Pressure
> Gauge designed for 100psi, a brass T and two
> barb-tip connectors. I plan on installing
> this contraption on my fuel line just after
> the fuel filter. Should give a good
> indication of pump, regulator and filter
> status over time.

> -Can anyone give me a good reason why this
> would or wouldn't work?

You need to be able to see fuel pressure at full throttle conditions to get any good info from it. Just looking under the hood at idle should not reveal any fuel system problems. It's under high load conditions that flow deficiencies show up. Getting fuel pressure is easy, but keeping it maintained under high flow conditions is not. Also your injectors can be clogged and have poor spray patterns and the fuel pressure will still be correct. Keep in mind fuel pressure and fuel flow are two different things and have to be measured in different ways. Get a Autometer electric fuel pressure gauge and mount that inside the cabin so you can see it while you are driving. Plus it's a lot safer than trying to use generic pressure gauges. or you can use an oil presssure gauge.
greg
71 240z
 

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Discussion Starter · #5 ·
Re: My car runs like a big scalded cheetah! (more.

I didn't think about full throttle conditions. I suppose that is the most important time for fuel delivery. I have looked at the Autometer system and am just wondering if there are any other solutions out there.
 

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Discussion Starter · #6 ·
Steve - check it out.

The AutoMeter stuff is great - I have another car that I have put the mechanical pressure gauge on and it works like a champ. You need to get an isolator block if you intend on running the gauge inside the cockpit - It fills with water or antifreeze and basically eliminates any possibility of fuel getting inside the cockpit. Barnett Performance here in Atlanta sells the entire setup - don't know if it would adapt to your Home Depot concoction, but an enterprising man such as yourself should have no problem adapting something! Glad your car is running good - mine finally is too.
Hope this helps

Tim McGovern (The OTHER Tim!)
White 78 280

> I didn't think about full throttle
> conditions. I suppose that is the most
> important time for fuel delivery. I have
> looked at the Autometer system and am just
> wondering if there are any other solutions
> out there.
 

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Re: 78 Tims.

> The AutoMeter stuff is great - I have
> another car that I have put the mechanical
> pressure gauge on and it works like a champ.
> You need to get an isolator block if you
> intend on running the gauge inside the
> cockpit - It fills with water or antifreeze
> and basically eliminates any possibility of
> fuel getting inside the cockpit. Barnett
> Performance here in Atlanta sells the entire
> setup - don't know if it would adapt to your
> Home Depot concoction, but an enterprising
> man such as yourself should have no problem
> adapting something! Glad your car is running
> good - mine finally is too.
> Hope this helps

> Tim McGovern (The OTHER Tim!)
> White 78 280

you know, now that you mention it there are a lot of guys named Tim driving '78 280's on this list. I bought mine new in '78, so i guess that makes me the original!!
 

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Fuel Pressure Gauge Installation

Steve,
congradulations guy! Gald to hear that the VR is running!!
I've done the fuel pressure gauge installation. I got one that was rated for fuel, 0-100psi, at a hot rod shop that has a 1/4 NPT threaded fitting. Then I bought a brass 'T' block with 1/4 threaded fittings and two brass hose babs for 5/16 hose that had 1/4 NPT threaded fittings on the other end. Also got some plumbers teflon pipe joining tape - taped up the fittings and screwed it all together. Bought a couple more hose clamps and then installed the 'T' block with the gauge between the fuel filter on the passenger side fender and the steel line feeding the fuel rail. Used the 'T' block to make the right angle turn that the hose used to make. It really works and looks great. Car runs at 36 psi.
Phantom
 

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Mine runs like a moist house cat.

My '77 Z W/ 71K miles just doesn't have the power that it should. Once it gets going it's okay but it's pretty sluggish from a stop. Other than having the injectors cleaned (that's coming soon.) what are some other areas I should check out?
 

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Re: Mine runs like a moist house cat.

> My '77 Z W/ 71K miles just doesn't have the
> power that it should. Once it gets going
> it's okay but it's pretty sluggish from a
> stop. Other than having the injectors
> cleaned (that's coming soon.) what are some
> other areas I should check out?

Patrick, are you sure that isn't 270,000 miles?? my '78 has 260,000 miles. in any case first i'd look at the timing to make sure it advances properly (check for vacuum leaks if not), and replace the fuel filter. What else??
 

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Discussion Starter · #11 ·
Re: Mine runs like a moist house cat.

> My '77 Z W/ 71K miles just doesn't have the
> power that it should. Once it gets going
> it's okay but it's pretty sluggish from a
> stop. Other than having the injectors
> cleaned (that's coming soon.) what are some
> other areas I should check out?

Check the plugs for fouling, check the cylinder compression. Make sure the catalytic converter (if your's has one) isn't plugged. Just give it a basic tune-up if you haven't lately, include air and fuel filters. Check the vaccum advance on the distributor, while you're at it put a timing light - on it pull the vaccum line off the dist and plug it and then make sure that timing is set to around 10d If it's way off you may have a stretched timing chain. This can be fixed pretty easily. Get a haynes or a chiltons manual for correct procedure.
 

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Re: Mine runs like a moist house cat.

> Patrick, are you sure that isn't 270,000
> miles?? my '78 has 260,000 miles. in any
> case first i'd look at the timing to make
> sure it advances properly (check for vacuum
> leaks if not), and replace the fuel filter.
> What else??
Could be 271,000. When I bought it the odometer read about 66,000 and I was told that was original. I've changed the fuel filter. Vacuum lines makes sense. I've changed quite a few already. I'll check it out. Thanks
 
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