Re: When is enough bhp enough?
Posted: Tue Sep 19, 2017 12:08 pm
Rohan, interesting definition of "subtle"!
Peter
Peter
The complete information source for Lotus Elan sportscars.
https://lotuselan.net/forums/
prezoom wrote:It isn't so much the horse power that I enjoy, it's the torque. My S2 is a standard 105 hp with a 3.9. Climbing out of my driveway with the Plus2 was an eye opener for me. The increased torque was immediately noticeable with the Zetec. I have a tall block Weber engine sitting on an engine stand that needs a complete overhaul. When complete, I had planned on putting in the Elan. As the saying goes: "There ain't no substitute for cubic inches".......... unless you add a turbo.
Spyder fan wrote:Somebody has done an S2000 installation, can't remember if it's a member on here but here's a link to a short YouTube clip https://m.youtube.com/watch?v=AjZdkEFFv74
Seems that oversteer is a problem and that tyre wear is dramatically increased, sounds nice though
The Veg wrote:Another engine that intrigues me and is available over here is the GM LSJ, a supercharged version of the Ecotec.
It can make some real power, and it's fairly compact in size. I saw pics somewhere of one installed in an Esprit, and it had lots of space leftover around it since it's way-shorter than a 9xx and doesn't lean to one side.
Wikipedia describes it thusly:
"The LSJ is a supercharged version of the LK9 Ecotec 2.0 L? 1,998 cc (121.9 cu in)? with an Eaton M62 Roots-type supercharger and air-to-liquid intercooler. The LSJ shares many of its components with the LK9 such as: piston cooling jets, oil cooler, pistons, connecting rods, crankshaft, oil pan, sodium-filled exhaust valves and cylinder head.[3] It is rated at 205 hp (153 kW) at 5600 rpm and 200 ft?lb (271 N?m) at 4400 rpm with a compression ratio of 9.5:1 and a 6500 rpm redline. With the end of the Chevy Cobalt S/C SS and Saturn Ion Red Line, the LSJ was discontinued after 2007. In late 2005 Brammo Motorsports struck a deal with GM for the Supercharged 2.0 L Ecotec for their Ariel Atom. The engine came in various ratings from 205 hp (153 kW) to 300 hp (220 kW).
The LSJ was on the Ward's 10 Best Engines list for 2006."
The different levels of power come from the fact that you can leave it stock, or install three levels of factory (yes, factory!) upgrade-kits that are fairly simple, consisting of things like different size injectors and supercharger pulleys, and of course having the ECU flashed for different specs. I think I've read too that at least at one time the LSJ was available as a crate-motor too, since it had so much potential for interesting applications.
Might go well with that T5 gearbox mod too.
Certified Lotus wrote:Developed by an international A-team of GM engineers and then refined by Lotus Engineering, the DOHC four-cylinder Ecotec is considered by the General to be the small-block Chevy of four-cylinders. A true world- class engine design, Ecotecs use an aluminum block and head and so far have been offered in displacements ranging from 1.8 liters to 2.4 liters. Although the vast majority of Ecotecs are normally aspirated with cast bottom ends, special high-performance supercharged and turbocharged variants have been produced with forged rotating components.
Well, with the engine refined by Lotus Engineering you would have a "pure" Lotus car with one of these engines under the bonnet.
gus wrote:The questions with engine swaps are:
"Ow long is it?" [that's a rather personal question]
"Ow tall is it?"
"Ow much does it weigh?"
The twink being only 18 inches long and 17 inches tall[to crank CL] and mid high 200 pound range it is tough to find a useful replacement
If one is positing a replacement engine these dimensions would be useful.
Newer motors have gone back to chains[shorter length], which is good
Newer motors have more vertical valves for tighter combustion chambers, and rockers for vvt functions [taller height]which is bad
I am always on the lookout for compact alloy v6s, since they can be short enough if their intake systems would fit........