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Fuel Stuff > Fuel Tank Lines (10 replies - 305 views)

The attached photo shows the fuel restrictor... for what that's worth. In effect, the restrictor is just a 'dumb', non-adjustable pressure regulator. So an ...   10-07-2018 02:52 pm

Fuel Stuff > Fuel Tank Lines (10 replies - 305 views)

Sorry about the double post. I'm not sure how that happened. I can't figure out how to delete this one. ...   10-04-2018 04:25 pm

Fuel Stuff > Fuel Tank Lines (10 replies - 305 views)

The simplest way to know if enough fuel is reaching the carbs is to check the fuel pressure at the carb inlet. The ...   10-04-2018 04:20 pm

Fuel Stuff > Fuel Tank Lines (10 replies - 305 views)

The simplest way to know if enough fuel is reaching the carbs is to check the fuel pressure at the carb inlet. The ...   10-04-2018 04:18 pm

Electrical & Instruments > Pertronix Tachometer "blips" (38 replies - 1037 views)

answerman wrote: No, the rebuilt Lucas has been perfect. Problem was that my original distributor, the one that came with the car, was a 45D4, ...   09-30-2018 05:16 pm

Engine & Transmission > Cam journal frozen (4 replies - 362 views)

Check with Lotusbits in the UK for used cam carriers and cams. http://www.lotusbits.com/ I'm not sure I understand how the head gasket blocked the oil passage (flipped ...   09-09-2018 12:49 am

Engine & Transmission > Cam journal frozen (4 replies - 362 views)

Here's a sketch of the oil's routing through the head. The joint between the head and the cam carriers is not shown. ...   09-07-2018 11:28 pm

Engine & Transmission > Cam journal frozen (4 replies - 362 views)

All 9XX 4-cyl heads are compatible with all 9XX 4-cyl blocks. There is nothing in the part designs that would have resulted in ...   09-04-2018 08:16 pm

Engine & Transmission > trans filling method (10 replies - 480 views)

Mondial1, There are plunger type pumps that fit gear oil bottles (like the pump on a hand lotion bottle or liquid soap dispenser). Valvoline ...   08-20-2018 03:53 pm

Engine & Transmission > jensen with strombergs (4 replies - 366 views)

jomac wrote: flame thrower coil is 4 years old.Is the rest of the ignition system stock, or has it been upgraded to some aftermarket electronic ignition? ...   07-21-2018 09:28 pm

Electrical & Instruments > Delco alternator (8 replies - 575 views)

If there's an automotive electric repair shop near you, then have it rebuilt. That usually costs around $100. If you buy a re-manufactured alternator ...   06-29-2018 04:33 pm

Intro Tech Board stuff > Fuel Stuff (2 replies - 372 views)

The Zenith-Stromberg carbs (and Dellorto) like 1.5 to 2.5 psi. Anything in excess of 3.8 will probably cause problems from running rich to, ...   05-26-2018 01:08 am

Fuel Stuff > Fuel pump pressure (10 replies - 1056 views)

Oh crud! I was trying to correct Haynes' mistake, then I fat-fingered it. Thanks for catching that, Tom. I've edited ...   05-23-2018 03:55 pm

Fuel Stuff > Fuel pump pressure (10 replies - 1056 views)

The Workshop Manual specifies an SU AUF 300 pump as standard. That pump's pressure output is 2.7 psi minimum (2.7-3.8 psi range). ...   05-21-2018 05:28 pm

Fuel Stuff > Fuel pump pressure (10 replies - 1056 views)

Float Heights: 17.5 mm = J-H Workshop Manual (leanest I've seen for Z-S) 16-17mm = Z-S generic Z-S, & Lotus 907 Workshop manuals. If you have the Haynes ...   05-21-2018 04:34 pm

Ignition > Should I rewire hot to coil ? (9 replies - 1075 views)

Is the Pertronix the basic Ignitor, or the Ignitor II? The original Ignitor is current sensitive and can fry in short order if ...   05-14-2018 05:49 am

Carburetors > Dellorto's need repair (2 replies - 571 views)

Have you tried The Carb Shop on the St Paul side of town? Two blocks south of Hwy 36 on White Bear AvN. http://www.thecarbguys.com/contact-us/ Sorry ...   05-10-2018 12:50 pm

Engine & Transmission > Does anybody know... (3 replies - 627 views)

Correct, this thread is NOT about tensioning the timing belt, it's about tightening the nut to securely lock the tensioner in place after the tension ...   05-03-2018 04:32 pm

Engine & Transmission > Does anybody know... (3 replies - 627 views)

I don't see the torque spec in the J-H manual, but in the Lotus world it's... Timing Belt Tensioner Retaining Nut 25 - 30 Lb-Ft = ...   05-02-2018 07:48 am

Engine & Transmission > what is shift pattern 4 verses 5 speed (2 replies - 780 views)

The 4-Speed has 1 thru 4 in the normal H-pattern, with reverse to the right and back. 1- 3 │─│─ı 2- 4- R The J-H Getrag 5-Speed has a ...   03-24-2018 09:01 pm

Ignition > Total JH Ignition Advance (3 replies - 909 views)

Rick, The Lotus distributor with 14.0° dist/ 28.0° crank degrees of mechanical advance is from late Federal emissions engines (Eclat, Elite & Esprit S2). ...   03-22-2018 06:45 pm

Carburetors > vacuum hose routing question (3 replies - 1099 views)

The distributor's vacuum capsule provides 8 degrees of retard in order to minimize oxides of nitrogen during closed throttle over-run and idle. Idle rpm rises with ...   03-11-2018 12:11 am

Engine & Transmission > Changing rear differential gears (9 replies - 1470 views)

J-H First Gear Overall Ratios (1st gear ratio times final drive ratio = overall ratio) First ––– Top Gear 10.76 –– 3.45 = J-H stock 4-spd ...   03-06-2018 11:04 pm

Engine & Transmission > Damaged Cam (5 replies - 1431 views)

Rubber seals and O-rings don't age well in static storage. If it has been 23 years since your car was last used, then ...   02-05-2018 09:25 pm

Engine & Transmission > Transmission Leaks 4 Speed 13556 (14 replies - 2321 views)

Off topic, but one more illustration while I'm on a roll. This one shows a modification to the rear journal in the Main ...   02-01-2018 07:52 am

Engine & Transmission > Transmission Leaks 4 Speed 13556 (14 replies - 2321 views)

This JPEG is another view of the spray shield. It also shows the rear cover and lip seal with the centering tool installed. ...   02-01-2018 07:39 am

Engine & Transmission > Transmission Leaks 4 Speed 13556 (14 replies - 2321 views)

answerman wrote: "When you install the seal make sure you hold it back aprox. 0.100" or it will leak like a sieve."The attached JPEG illustrates how ...   02-01-2018 07:28 am

Engine & Transmission > Transmission Leaks 4 Speed 13556 (14 replies - 2321 views)

Tim Murphy wrote: Redracer,(or anyone else)do you have a picture or diagram of what you are describing. Or maybe you can explain it more for those ...   02-01-2018 07:24 am

Engine & Transmission > Transmission Leaks 4 Speed 13556 (14 replies - 2321 views)

The JH Workshop manual doesn't mention using any sealant or threadlocker on the flywheel bolts. And Jim is correct, oil can wick past ...   01-30-2018 05:02 pm

Engine & Transmission > Damaged Cam (5 replies - 1431 views)

Simon, There's no standard for how badly damaged a journal can be, and still be useable. IMHO, this one shouldn't be used as is. ...   01-24-2018 04:54 pm

Projects > 16173 will be entering project status... (162 replies - 107237 views)

Jeff at Advanced Distributors can rebuild it for you. Also talk to him about modifying the Pertronix distributor to accept a seal. Jeff is ...   01-12-2018 04:42 am

Ignition > 1974 Jensen Healey Crank but No Start (13 replies - 2175 views)

Dave427 wrote: The carbs have not been touched. I will have a look at them the next time I am over at the car. I will ...   01-04-2018 06:05 am

Ignition > 1974 Jensen Healey Crank but No Start (13 replies - 2175 views)

Dave, How large is the photo file? The forum won't allow attachments larger than 102400 bytes (102.4 kb). Don't use the 'Quick Reply' option at ...   01-02-2018 12:39 am

Ignition > 1974 Jensen Healey Crank but No Start (13 replies - 2175 views)

Dave, I have no idea what to say about the old alarm system, or any loose wires that may have resulted from removing it. ...   01-02-2018 12:28 am

Carburetors > Zenith Stromberg Carburetor Vacuum Lines Schematic (11 replies - 10839 views)

chrisl wrote: I've acquired a set of Strombergs and am refurbishing them to fit on my GT. It currently has Dellortos on it and runs fine ...   12-16-2017 06:21 pm

Engine & Transmission > Compression Readings for 2.2L Stroker Lotus 907 Engine (2 replies - 1412 views)

Cylinder pressures vary with compression ratio, not stroke length/ displacement. It's normal practice to check cylinder pressures on a hot engine, with the plugs removed, the ...   12-13-2017 09:48 pm

Engine & Transmission > Reversed cams effects (12 replies - 4625 views)

It's good to hear the compression has improved. Spec Compression Pressure for 8.4:1 cr are: 110-130 psi COLD = Jensen-Healey spec. 150-170 psi HOT. = Lotus specifies checking ...   12-12-2017 06:23 am

Engine & Transmission > Engine rope rear main seal in early Mk1 (7 replies - 1518 views)

Just a general statement about rope seals... I don't know how specifically this applies to the Mk I 907's seal. In the 1980s, asbestos and some ...   12-10-2017 09:11 pm

Engine & Transmission > Engine rope rear main seal in early Mk1 (7 replies - 1518 views)

The rope seal is flawed by type. It's old school, and less than perfect. If you install it perfectly, it may ...   12-10-2017 06:26 am

Engine & Transmission > Auto gearbox on a J-H or GT (3 replies - 1185 views)

I've never seen a JH converted to automatic, but Lotus did offer a 907/ Borg-Warner 3-spd auto combination in the Series 1 Elite & ...   12-03-2017 05:45 pm


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