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341 postsShowing posts 1-40 of 341

Brakes > Removing the rear brake brake back plate (2 replies - 142 views)

JPJH wrote:It looks like you need to take the axle apart.You're right. Pull the axle shafts out of the housing. Or, ...   12-27-2018 06:09 am

Carburetors > Rebuild or upgrade? (14 replies - 485 views)

There should be two gaskets in the choke (aka, enrichment device). One internal to the choke itself, and one between the choke and ...   12-20-2018 07:26 pm

Carburetors > Rebuild or upgrade? (14 replies - 485 views)

Constant Depression carburetors, like Zenith-Strombergs & SUs don't have the crisp throttle response that's typical of a venturi carb. Opening the throttle starts ...   12-19-2018 04:58 am

Body & interior stuff > carburetor (4 replies - 297 views)

Jomac, Your first message sounds familiar to me. For starters, replace the fuel filter, preferrably with a large one. Then inspect the contents of the ...   11-16-2018 06:55 pm

Miscellaneous > MK I vs MK II Differences (4 replies - 423 views)

DonBurns wrote: I don't think rope seals were the distinguishing factor. Only very early Mark I had those. Correct? All Mk I 907s had rope ...   11-10-2018 09:17 pm

Fuel Stuff > Fuel Pump vs Fuel Lines (35 replies - 2301 views)

When you're standing in front of the car, looking at the front of the engine, it's normal running direction is CLOCKWISE. That includes ...   11-08-2018 07:17 pm

Fuel Stuff > Fuel Pump vs Fuel Lines (35 replies - 2301 views)

Randallclary@icloud.com wrote: Thanks Tim. Do my other comments seem ok?No problems. Tim ...   11-08-2018 05:29 pm

Fuel Stuff > Fuel Pump vs Fuel Lines (35 replies - 2301 views)

Close, but not quite. The firing order is 1-3-4-2. The cylinders fire from center out, front pair, then rear pair. So 2-1-3-4-2-1-3-4... Since ...   11-05-2018 05:00 pm

Fuel Stuff > 1976 Jensen GT (12 replies - 923 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). ...   10-25-2018 01:59 am

Fuel Stuff > 1976 Jensen GT (12 replies - 923 views)

The attached photo shows the 0.046" ID restrictor that is inserted into the fuel return line. It's not my photo, but I've forgotten ...   10-24-2018 08:28 pm

Fuel Stuff > 1976 Jensen GT (12 replies - 923 views)

Does the Jensen GT's owner have the manuals for you to reference, or are you working in the dark? The original fuel pump was an SU, ...   10-24-2018 08:21 pm

Fuel Stuff > Fuel Tank Lines (10 replies - 1007 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 03:52 pm

Fuel Stuff > Fuel Tank Lines (10 replies - 1007 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 05:25 pm

Fuel Stuff > Fuel Tank Lines (10 replies - 1007 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 05:20 pm

Fuel Stuff > Fuel Tank Lines (10 replies - 1007 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 05:18 pm

Electrical & Instruments > Pertronix Tachometer "blips" (38 replies - 3250 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 06:16 pm

Engine & Transmission > Cam journal frozen (4 replies - 736 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 01:49 am

Engine & Transmission > Cam journal frozen (4 replies - 736 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. ...   09-08-2018 12:28 am

Engine & Transmission > Cam journal frozen (4 replies - 736 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 09:16 pm

Engine & Transmission > trans filling method (10 replies - 1109 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 04:53 pm

Engine & Transmission > jensen with strombergs (4 replies - 737 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 10:28 pm

Electrical & Instruments > Delco alternator (8 replies - 1035 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 05:33 pm

Intro Tech Board stuff > Fuel Stuff (2 replies - 636 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 02:08 am

Fuel Stuff > Fuel pump pressure (10 replies - 1870 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 04:55 pm

Fuel Stuff > Fuel pump pressure (10 replies - 1870 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 06:28 pm

Fuel Stuff > Fuel pump pressure (10 replies - 1870 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 05:34 pm

Ignition > Should I rewire hot to coil ? (9 replies - 1781 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 06:49 am

Carburetors > Dellorto's need repair (2 replies - 828 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 01:50 pm

Engine & Transmission > Does anybody know... (3 replies - 938 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 05:32 pm

Engine & Transmission > Does anybody know... (3 replies - 938 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 08:48 am

Engine & Transmission > what is shift pattern 4 verses 5 speed (2 replies - 1058 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 10:01 pm

Ignition > Total JH Ignition Advance (3 replies - 1201 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 07:45 pm

Carburetors > vacuum hose routing question (3 replies - 1423 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 01:11 am

Engine & Transmission > Changing rear differential gears (9 replies - 2039 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 ...   03-07-2018 12:04 am

Engine & Transmission > Damaged Cam (5 replies - 1869 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 10:25 pm

Engine & Transmission > Transmission Leaks 4 Speed 13556 (14 replies - 3198 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 08:52 am

Engine & Transmission > Transmission Leaks 4 Speed 13556 (14 replies - 3198 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 08:39 am

Engine & Transmission > Transmission Leaks 4 Speed 13556 (14 replies - 3198 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 08:28 am

Engine & Transmission > Transmission Leaks 4 Speed 13556 (14 replies - 3198 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 08:24 am

Engine & Transmission > Transmission Leaks 4 Speed 13556 (14 replies - 3198 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 06:02 pm


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