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Search: Posts Made By: 142 guy
Forum: maintenance & nonperformance Yesterday, 11:52 AM
Replies: 11
Views: 339
Posted By 142 guy
If it is a Bosch 3 wire valve, it might also be...

If it is a Bosch 3 wire valve, it might also be open when un powered. I just mentioned the Bosh 2 wire valve because I know that it is open when it is not powered up. Checking the service manual...
Forum: maintenance & nonperformance 05-03-2021, 06:04 PM
Replies: 11
Views: 339
Posted By 142 guy
As a further note, my previous comments were...

As a further note, my previous comments were based upon using a starter by-pass switch to operate the starter motor during cranking with the ignition switch off. If you disable the fuel pump and...
Forum: maintenance & nonperformance 05-03-2021, 01:32 PM
Replies: 11
Views: 339
Posted By 142 guy
The difference in the test results in a car with...

The difference in the test results in a car with a conventional throttle will likely be in how quickly the cylinder reaches its final test pressure. The throttle plate creates a restriction in the...
Forum: aftermarket engine management 04-30-2021, 12:59 PM
Replies: 24
Views: 1,899
Posted By 142 guy
I had not read your code and had read into your...

I had not read your code and had read into your comments that you were using the digital read inside the main loop. If you are doing the digital read inside the ISR then you have eliminated the...
Forum: aftermarket engine management 04-26-2021, 11:08 AM
Replies: 24
Views: 1,899
Posted By 142 guy
The digital read may work if the event timing is...

The digital read may work if the event timing is relatively slow compared to the clock speed and you don't have many other code steps going on in the main software loop. As an example, if...
Forum: aftermarket engine management 04-25-2021, 01:02 PM
Replies: 24
Views: 1,899
Posted By 142 guy
First off, I did not mean to imply that you...

First off, I did not mean to imply that you should not use opto isolators. Its just that you need to be aware of the frequency limitations. It seems like you are already aware of those problems so...
Forum: aftermarket engine management 04-23-2021, 12:56 PM
Replies: 24
Views: 1,899
Posted By 142 guy
Be aware that opto isolators have a down side. ...

Be aware that opto isolators have a down side. Their high frequency response is not spectacular. I use opto isolators on the inputs from the optical sensors on my tach and cam wheels on my MSII...
Forum: performance & modifications 04-23-2021, 11:34 AM
Replies: 5
Views: 771
Posted By 142 guy
If you need a place to start, use the Ve table...

If you need a place to start, use the Ve table generator in the Megamanual

http://www.megamanual.com/v22manual/vetable.htm

I think there are other Ve generators out there if you go looking. ...
Forum: maintenance & nonperformance 04-16-2021, 01:27 AM
Replies: 11
Views: 1,656
Posted By 142 guy
When you turn the ignition key to the run...

When you turn the ignition key to the run position does the fuel pump start up and run for about 2 seconds and then shut off? That is the fuel pump prime cycle to pressurize the fuel system before...
Forum: maintenance & nonperformance 04-12-2021, 05:17 PM
Replies: 22
Views: 2,833
Posted By 142 guy
At idle, particularly when the air temp is cool...

At idle, particularly when the air temp is cool the temperature of the coolant in the engine outlet hose fluctuates about 6 Deg C (give or take) because the thermostat tends to be a bit of a bang...
Forum: maintenance & nonperformance 04-12-2021, 12:57 PM
Replies: 22
Views: 2,833
Posted By 142 guy
Have you ever thought about the possibility that...

Have you ever thought about the possibility that the gauge itself is the problem? I don't have a service manual for the 240; but, I expect that there should be a calibration test that you can...
Forum: maintenance & nonperformance 04-11-2021, 05:33 PM
Replies: 11
Views: 1,656
Posted By 142 guy
Yes, one terminal in the injector plug is...

Yes, one terminal in the injector plug is grounded at the connection on the intake manifold. The other terminal receives switched power from the controller. ON my 1971 142 E, each wire in the D...
Forum: maintenance & nonperformance 04-10-2021, 04:32 PM
Replies: 11
Views: 1,656
Posted By 142 guy
How did you confirm fuel delivery? The most...

How did you confirm fuel delivery? The most direct way would be to pull the fuel rail out with the injectors attached and then crank the engine for a second or two to confirm fuel delivery at each...
Forum: aftermarket engine management 04-10-2021, 04:15 PM
Replies: 5
Views: 1,081
Posted By 142 guy
No direct experience with that particular sensor;...

No direct experience with that particular sensor; but, as a general observation Hall sensors are easier to deal with than Vr sensors. No speed related issues and no need for conditioning circuits.
Forum: performance & modifications 04-09-2021, 12:53 AM
Replies: 9
Views: 1,720
Posted By 142 guy
Do you know whether you are going to do wasted...

Do you know whether you are going to do wasted spark or are you planning for full sequential on fuel and spark with individual coils for each cylinder. That would be a good thing to figure out...
Forum: aftermarket engine management 04-07-2021, 12:56 PM
Replies: 5
Views: 2,073
Posted By 142 guy
Coolant temperature effects should be completely...

Coolant temperature effects should be completely out of the picture once the engine is up to normal operating temperature. Make sure that you don't have some coolant temperature based PW adder that...
Forum: performance & modifications 04-07-2021, 12:25 PM
Replies: 6
Views: 1,408
Posted By 142 guy
The most important factor is that you do not want...

The most important factor is that you do not want to ground the heater circuit for the wideband controller at the Microsquirt controller. This will couple the heater current which can include a lot...
Forum: performance & modifications 04-05-2021, 12:55 PM
Replies: 4
Views: 1,223
Posted By 142 guy
The O2 sensor wiring in both links is correct. ...

The O2 sensor wiring in both links is correct. The O2 sensor signal enters on pin MS pin 34. The MSExtra diagram makes provision for connection of an isolated O2 sensor signal ground back to pin...
Forum: maintenance & nonperformance 04-02-2021, 01:08 PM
Replies: 4
Views: 1,133
Posted By 142 guy
How good is the Evap system in your 940? If it...

How good is the Evap system in your 940? If it works properly and seals as designed then you do not have to worry about the fuel system breathing moist outside air into the tank as ambient air...
Forum: performance & modifications 04-01-2021, 11:11 AM
Replies: 5
Views: 1,265
Posted By 142 guy
Yes to preventing the formation of ice in the...

Yes to preventing the formation of ice in the PVC system; but, more likely to prevent the formation of ice which blocks the PVC air flow through the engine (located between the airbox and turbo it...
Forum: maintenance & nonperformance 03-24-2021, 07:03 PM
Replies: 12
Views: 1,445
Posted By 142 guy
Tachs tend to come in two flavors, voltage...

Tachs tend to come in two flavors, voltage sensing (the most common) and current sensing (like the original Volvo tach's supplied by Smiths). If you purchase a modern tach, it will almost certainly...
Forum: maintenance & nonperformance 03-22-2021, 01:51 PM
Replies: 19
Views: 2,570
Posted By 142 guy
First off, do the differential yoke twist to...

First off, do the differential yoke twist to check for play in the differential. If you can twist the yoke at all without any movement in the rear wheels you have lash inside the differential that...
Forum: aftermarket engine management 03-12-2021, 06:18 PM
Replies: 19
Views: 3,400
Posted By 142 guy
The set temperature of the soldering iron will in...

The set temperature of the soldering iron will in part depend on the wattage of the heating element. If you have a lower wattage heating element you may have to set the temperature a bit hotter...
Forum: aftermarket engine management 03-12-2021, 12:40 PM
Replies: 19
Views: 3,400
Posted By 142 guy
I have gone full sequential with coils with...

I have gone full sequential with coils with integrated drivers so I have no experience with conventional ignition coil control using the BIP 373 or external amplifiers. I will let others advise on...
Forum: maintenance & nonperformance 03-11-2021, 04:57 PM
Replies: 3
Views: 1,179
Posted By 142 guy
Looks like you are going to have to 'find' the...

Looks like you are going to have to 'find' the key to go with your 'found' gutter mounts. Thule can supply you with a key if you provide the cylinder code.
...
Forum: performance & modifications 03-11-2021, 01:18 PM
Replies: 10
Views: 1,698
Posted By 142 guy
That picture posted by Redwood appears to be the...

That picture posted by Redwood appears to be the later 140 filter assembly (part # ends in ....44). New ones are still available.
...
Forum: maintenance & nonperformance 03-09-2021, 12:53 PM
Replies: 18
Views: 1,529
Posted By 142 guy
I agree with Mr. Chair. I would do a quick...

I agree with Mr. Chair. I would do a quick visual inspection of the lower portion of the steering shaft. Grab the input to the steering box (below the break away section) and then grab the top of...
Forum: performance & modifications 02-20-2021, 12:37 PM
Replies: 13
Views: 1,482
Posted By 142 guy
Begs the question, is the OP incurring back fire...

Begs the question, is the OP incurring back fire which is combustion products exiting through the intake system (the always spectacular flame exiting the chokes on a 4 barrel carb followed by...
Forum: performance & modifications 02-19-2021, 01:11 PM
Replies: 13
Views: 1,482
Posted By 142 guy
Do you have a blow off valve venting to...

Do you have a blow off valve venting to atmosphere? If not, where is the flame coming from if the exhaust manifold was repaired?

If you have an atmospheric venting blow off valve, the upset in...
Forum: projects & restorations 02-18-2021, 09:16 PM
Replies: 64
Views: 40,958
Posted By 142 guy
The bracket with the relays would have been...

The bracket with the relays would have been common on all 140s up until at least 1972. No bolts associated with mounting the bracket, just a couple of phillips head sheet metal screws (probably #8...
Forum: projects & restorations 02-18-2021, 11:57 AM
Replies: 64
Views: 40,958
Posted By 142 guy
The 'sketchy aftermarket junction box' that you...

The 'sketchy aftermarket junction box' that you are referring to, is that that row of three relays mounted on a bracket? If so, that is not aftermarket. It is OEM and (on a 1971 model) the three...
Forum: maintenance & nonperformance 02-13-2021, 01:44 PM
Replies: 4
Views: 1,065
Posted By 142 guy
I expect that the Amazon is like the 140. All...

I expect that the Amazon is like the 140. All the external rear view mirrors on the 140 were dealer installed so there is no 'correct' location. For the driver side with an OEM Volvo mirror, the...
Forum: maintenance & nonperformance 02-13-2021, 01:29 PM
Replies: 4
Views: 1,105
Posted By 142 guy
My other car is a first gen NSX. Engine in...

My other car is a first gen NSX. Engine in back, radiator in front, miles of coolant hoses & pipes and a number of drain ports and bleeder vents. A vacuum refill tool is the preferred refill...
Forum: performance & modifications 02-12-2021, 06:32 PM
Replies: 12
Views: 1,845
Posted By 142 guy
The exhaust turbine is an expander. Both the...

The exhaust turbine is an expander. Both the temperature and the pressure of the gas drops as it expands through the turbine so the turbine extracts energy from both. That is why there is benefit...
Forum: performance & modifications 02-12-2021, 01:51 PM
Replies: 12
Views: 1,845
Posted By 142 guy
E85 has a stoichiometric ratio of around 9.8:1...

E85 has a stoichiometric ratio of around 9.8:1 compared to around 14.7:1 for non ethanol gasoline which reflects the fact that ethanol is an oxygen bearing fuel. So, per engine cycle an engine...
Forum: maintenance & nonperformance 02-04-2021, 05:35 PM
Replies: 28
Views: 3,952
Posted By 142 guy
Is the Denso a 1 wire alternator or does it have...

Is the Denso a 1 wire alternator or does it have a separate excitation terminal that you have connected to the dash charge light? If it has an external excitation terminal disconnect the terminal...
Forum: maintenance & nonperformance 02-03-2021, 12:09 PM
Replies: 28
Views: 3,952
Posted By 142 guy
You need to go back and repeat your measurement...

You need to go back and repeat your measurement of the parasitic current. A 150 mA current on a 12 volt battery is equivalent to 1.8 watts, about the rating of one of those little dash indicator...
Forum: maintenance & nonperformance 01-31-2021, 02:49 PM
Replies: 12
Views: 1,809
Posted By 142 guy
If there is a spec in the service manual for...

If there is a spec in the service manual for clutch fork motion check it to make sure that you are getting the correct amount of movement from the slave cylinder to insure complete disengagement. ...
Forum: maintenance & nonperformance 01-31-2021, 01:35 AM
Replies: 21
Views: 3,017
Posted By 142 guy
You can buy the Motive adapter cap that fits the...

You can buy the Motive adapter cap that fits the Volvo MC for something around $15 or less and a garden pump sprayer from a big box store will do fine for a pressure source. Just don't over do it...
Forum: maintenance & nonperformance 01-30-2021, 03:38 PM
Replies: 33
Views: 4,118
Posted By 142 guy
Perhaps the OP has grown up with Honda Ks or cars...

Perhaps the OP has grown up with Honda Ks or cars equipped with hydraulic lifters. The noise they are now hearing may be normal Volvo OHV racket. Of course, without getting caught up in the debate...
Forum: performance & modifications 01-30-2021, 03:32 PM
Replies: 60
Views: 7,402
Posted By 142 guy
Volvo's advertised hp for a B30E was 175 hp @...

Volvo's advertised hp for a B30E was 175 hp @ 5800 RPM. That would be 'advertised / exaggerated' and measured at the crankshaft. If you measured a 'true' 185 hp at the rear wheels that strikes me...
Forum: performance & modifications 01-28-2021, 01:58 PM
Replies: 60
Views: 7,402
Posted By 142 guy
I have also mulled a low pressure turbo...

I have also mulled a low pressure turbo application as an alternative to increasing valve lift and valve duration (and valve train wear) for a modest across the RPM band power increase. The...
Forum: performance & modifications 01-27-2021, 06:50 PM
Replies: 60
Views: 7,402
Posted By 142 guy
I probably should have worded that as best in...

I probably should have worded that as best in terms of being able to make it better in terms of how much weld was required to fill the floor of the exhaust port to improve the short side radius. My...
Forum: performance & modifications 01-27-2021, 04:08 PM
Replies: 60
Views: 7,402
Posted By 142 guy
Presumably the reference means a B20F head? ...

Presumably the reference means a B20F head? If so that probably has the best exhaust ports of any factory B20 and provide a better starting point for future porting work than other heads.
...
Forum: performance & modifications 01-26-2021, 11:14 PM
Replies: 60
Views: 7,402
Posted By 142 guy
A decent way down is normal for stock. When I...

A decent way down is normal for stock. When I assembled my B20E the pistons were on average 0.02" below the deck. Even with a 0.028 gasket from the B20B that piston height gives a quench depth...
Forum: performance & modifications 01-26-2021, 09:47 PM
Replies: 14
Views: 2,734
Posted By 142 guy
If you do the T5 path, make sure you get a T5...

If you do the T5 path, make sure you get a T5 with the correct set of ratios for the B20 and your differential. The spreads on some of the T5 boxes work well with big V8s, not so well with less...
Forum: maintenance & nonperformance 01-26-2021, 06:18 PM
Replies: 16
Views: 1,666
Posted By 142 guy
I am running the 280 Z regulator. It will run...

I am running the 280 Z regulator. It will run without the vacuum reference line attached; but, it will have a constant 36 psi fuel pressure compared to the 30 psi for the 1972 B20F. The flow rates...
Forum: aftermarket engine management 01-26-2021, 05:58 PM
Replies: 29
Views: 5,927
Posted By 142 guy
I have seen the Microsquirt wiring instructions...

I have seen the Microsquirt wiring instructions which say connect all the sensor grounds to pin 20. Its not a particularly good design; but, it will work if you make the single connection from pin...
Forum: maintenance & nonperformance 01-26-2021, 03:16 PM
Replies: 16
Views: 1,666
Posted By 142 guy
JohnMc's advice is correct. Up to 1971 the B20E...

JohnMc's advice is correct. Up to 1971 the B20E used a firewall mounted 2 port regulator and in 1972 Volvo / Bosch switched to the three port regulator. With a 5/16" Tee fitting you can use the...
Forum: aftermarket engine management 01-26-2021, 02:33 PM
Replies: 29
Views: 5,927
Posted By 142 guy
Does mean that you have a dedicated ground...

Does mean that you have a dedicated ground wire running from the MAP sensor to a dedicated ground pin on the MS or does it mean you have a shared sensor ground back to the MS? Sharing grounds is...
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