http://esprit.driestone.com/wiki/ 2026-04-20T02:33:25+00:00 http://esprit.driestone.com/wiki/ http://esprit.driestone.com/wiki/lib/tpl/dokuwiki/images/favicon.ico text/html 2021-12-21T18:55:09+00:00 Anonymous (anonymous@undisclosed.example.com) http://esprit.driestone.com/wiki/doku.php?id=engine:cams&rev=1640112909&do=diff Cams On US models, you should swap the stock 107 intake cam with the higher lift 104 cam. This does sacrifice a little power at the low end (below 3k RPM) for top end performance. Cam Gears Cam Follower Shims It is very possible, after an engine rebuild, that your valve clearances will be off (the distance between the cam and the follower). They should be 0.005 - 0.007 text/html 2026-04-19T04:33:28+00:00 Anonymous (anonymous@undisclosed.example.com) http://esprit.driestone.com/wiki/doku.php?id=engine:carburetors&rev=1776573208&do=diff Carburetors The Turbo Esprit was equipped with Dellorto carburetors from the factory. Exported cars received the DHLA 40 H. UK and North American cars received the DHLA 45 M. text/html 2026-04-20T00:24:38+00:00 Anonymous (anonymous@undisclosed.example.com) http://esprit.driestone.com/wiki/doku.php?id=engine:distributor&rev=1776644678&do=diff Electronic Ignition Lotus P.B.C. Inc. makes a distributor-less ignition system for the pre-HCI cars Even more popular is the Lumenition Kit. Vacuum Advance More to come text/html 2021-12-21T20:06:30+00:00 Anonymous (anonymous@undisclosed.example.com) http://esprit.driestone.com/wiki/doku.php?id=engine:fixingstumbles&rev=1640117190&do=diff Fixing Stumbles More than likely, a stumble (i.e. the car loosing power,) is due to carburetors (the second most likely cause is timing/ignition.) Stumble or dying on long hard corners Float height is probably not set properly (or your floats aren't working properly.) The bowls fill with fuel and when you aren't pushing lateral G's the engine gets flooded. It has also been suggested that fuel can be getting in the air correction for the idle jets. The proposed solution is to drill holes from … text/html 2026-04-19T23:43:24+00:00 Anonymous (anonymous@undisclosed.example.com) http://esprit.driestone.com/wiki/doku.php?id=engine:fueltanks&rev=1776642204&do=diff Fuel Pump and Tanks Fuel Pressure Fuel pressure should be read before the adjustable regulator. The fuel pressure with the pumps running but engine off should be 4 to 5psi. When started, it is standard for the pressure of the tank to fall to 1psi (but should read less than 3.5psi.) text/html 2026-04-19T15:26:12+00:00 Anonymous (anonymous@undisclosed.example.com) http://esprit.driestone.com/wiki/doku.php?id=engine:gasventtube&rev=1776612372&do=diff Gas Vent Tube Well, if you're familiar with the smell of gas in the cockpit of your Esprit, you probably need to replace the gas vent hose that is known to eventually deteriorate. You may have even wondered how the smell finds its way into the cockpit area. Vapors can find there way into the cockit thru the upper seatbelts recoil units, which sit right over top of the fuel tanks. In other cases it finds its way into the door sill cavity via cable and hose penetrations in the bulkhead. Thats wh… text/html 2021-12-21T20:15:44+00:00 Anonymous (anonymous@undisclosed.example.com) http://esprit.driestone.com/wiki/doku.php?id=engine:hotstart&rev=1640117744&do=diff Hot Start Problems If your Esprit has a hard time starting after it's been operated for a while, you probably have a fuel system problem. Check the float heights and weights in your carburetors. Spec is 15mm height and 8gr. You may have a bad float which floods the engine making starting difficult. Letting the car sit allows the gas to level off in the float bowls allowing you to start the car. Does your oil have a strong gas smell? text/html 2021-12-21T20:04:12+00:00 Anonymous (anonymous@undisclosed.example.com) http://esprit.driestone.com/wiki/doku.php?id=engine:removal&rev=1640117052&do=diff Engine Removal Removing the engine from the Esprit is not a simple task (as one might assume,) but it is also not beyond the abilities of an ambitious wrencher. Be prepared to spend 10 or more hours (with two people) pulling the engine. If you have a lift or an overhead hoist you can save quite a bit of time. Before attempting removal make sure you own the Lotus shop manuals. Most everything is straight forward when removing the engine and you shouldn't need any special equipment other than an … text/html 2021-12-21T19:25:45+00:00 Anonymous (anonymous@undisclosed.example.com) http://esprit.driestone.com/wiki/doku.php?id=engine:turbocharger&rev=1640114745&do=diff Turbocharger The stock Esprit uses a non-intercooled Garrett T3 Turbocharger with an external wastegate set to 8psi on carbureted engines and 9.5 psi on HCI cars. Overview of how turbochargers work The Garrett T3 is a popular turbocharger and is still used in many aftermarket setups today. The exhaust housing may have to be transplanted from your old turbo to whatever replacement/upgrade you get. The stock Turbo is a Garrett T3 with a 40 trim impeller and an A/R 0.48 exhaust housing. text/html 2026-04-19T21:01:54+00:00 Anonymous (anonymous@undisclosed.example.com) http://esprit.driestone.com/wiki/doku.php?id=engine:vacuumrouting&rev=1776632514&do=diff Vacuum Routing Vacuum routing is slightly different between certain model years (and US/UK models). Most of this is US-centric information. The US cars had air pumps equipped for emissions compliance. Most owners removed this system due to the fact that it would frequently break. The diverter valve and the associated plumbing is usually removed. Additionally, although the vacuum diagram seems to indicate that there is a line coming off the vacuum pump, this doesn't appear to be the case for ma…