The Lotus Grand Tourers

May 28, 2022 12:35, on the Lotus Grand Tourers, Alan M wrote: Hi, does anyone have a copy of the guide to tuning the Dellorto written by Tim Engel (Esprit2). I normally access it from his website, but the link isn’t working - http://www.espritfactfile.com/carbbalancing.html End Quote: Alan, FYI, the...

Thanks, Alan. I was trying to figure out how to post it here. Apparently I can't, so that link you posted is very helpful. This shorter link will get you to the same place... https://tinyurl.com/3esmdx53 The "Files" section over on that Facebook Group has great potential as a "How To" library, but I...

The AB14 is/was pretty common. Remove the cover, and it's an almost empty box. Inside is a GM HEI amplifier, one electrolytic capacitor, and one diode. The diode and capacitor are common electronic parts. The diode is pretty failure proof, but it's cheap to replace. Electrolytic capacitors tend to d...

Oh and +0.015" main bearings! Failing that, another option is to use the main bearing shells from the American Chrysler 273, 318 & 340 V8 engines. The Inside Diameters and widths match the Lotus application. The Outside Diameter is +0.027" oversize, compared to the Lotus +0.015" oversize shells. Ev...

I believe there should be some plastic, snap-on shoes on the feet of the BT-33-86J gauge. Without them, the calibration would be off. I know nothing about the KM4088AR. Both look like they have enough miles on them that they should be re-calibrated... shoes or no shoes.

Regards,
Tim Engel

Lotus valve shims for Twin Cam and 9XX engines are the same. And both are interchangeable with shims for the Triumph TR7 and older Jaguar XK 6-cylinder engines (Moss Motors, Victoria British, The Roadster Factory... etc), Saab 99 2-valve, Cosworth, Coventry-Climax (vintage racing suppliers) and the ...

15" x 7" . . . . Rim Size, Inch +23.3. . . . . . Offset 60mm. . . . . . Center Bore 5 x 4 1/4" . . . Bolt Circle, Inch 5 x 108mm . . Bolt Circle, Metric When you ask about Offset, be aware that some websites or retailers will reply with ET. Offset and ET are NOT the same thing. Measured on the same ...

The impeller used in the 907 pumps had very few, short vanes. That may (??) also apply to the 912LC. The 910 Turbo and 912HC pumps use an impeller that has more, much longer vanes. That, plus a deeper scroll housing portion of the pump housing means the later pumps can move a lot more coolant for be...

Follow this link to a PDF file on how to rebuild the water pump: https://tinyurl.com/565eaeay Early seals were over-molded with black rubber, while modern seals are stainless steel. They're easy to tell apart at a glance. Presuming any modern rebuild kit will include the stainless steel seal, you wi...

Here are a couple of updates on that same theme: Balancing Dellorto - 'The Lotus Grand Tourers' - by Tim Engel.pdf - 2003 https://tinyurl.com/bdhmukjy Balancing Dellorto & Weber Carbs - Procedure - Tim Engel.pdf - 2022 https://tinyurl.com/5cm35fdx Same basic content, just updated. I'm editing now, a...

Just my opinion, but I avoid using silicone sealants on engines, When you tighten the joint, and a little silicone oozes out, you can easily wipe off the excess. No big deal. But whatever you see oozing out on the outside of the joint, you can bet there's a similar amount on the inside. And while th...

Go Here: https://tinyurl.com/mryxsnhk to download a copy of '9XX Engine Rebuild Data, 4-Cyl - Master.xlsx' Note that it's an Microsoft Excel.xlsx 'Workbook' containing multiple 'Worksheets'. Click on the tabs across the bottom of the Workbook to open any Worksheet. "Engine Rebuild Data" is my notebo...

Go here: https://tinyurl.com/45kwkm4y This page is from the 93-97 Service Notes simply because I had it handy. The flatness info applies to all 9XX 4-Cylinder heads. "IF" you have the head milled to flatten it, make sure the machinist knows the bottom & top of the head must be parallel. The cranksha...

I use gaskets for all 9XX 4-cyl applications, regardless of what the Lotus manual says. I've experienced leaks with pumps that are sealed with an anaerobic sealant only, so rather than mess with it anymore, I just put a standard gasket in the joint and seal it with Hylomar AV. It seals well. I'm an ...

Nice article overall, but the author clearly wasn't an expert on the Excel. For instance, he wrote, "At the same time, the rear suspension was modified to incorporate the Esprit’s top link and lower wishbone layout in place of the Elite’s Chapman strut." Wrong Elite. The Type 14 2-seater had Chapman...