BigMike's Forum

Automotive and Theory => Cars => Topic started by: BigMike on November 25, 2010, 02:25:34 PM

Title: Lotus releases 271hp Exige GT3
Post by: BigMike on November 25, 2010, 02:25:34 PM
http://jalopnik.com/241811/geneva-showcase-lotus-exige-gt3

From Wikipedia:
Engine
    Toyota supplied 2ZZ-GE, 1796 cc I-4, DOHC with VVTL-i and Lotus T4e engine management system, Roots-type Eaton M62 supercharger and intercooled
    Bore/Stroke 82.0 mm / 85.0 mm
    271 bhp (202 kW; 275 PS) @ 8000 rpm[6]
    190 lbft (258 Nm) @ 7000 rpm[6]
    Compression Ratio: 11.5:1

Exige GT3 performance
    0-60 mph : 3.9 seconds[6]
    0-100 km/h : 4.0 seconds[6]
    0-100 mph (0-160 km/h) : 9.8 seconds[6]
    Top Speed : 160 mph (260 km/h) - electronically limited[6]
    Power to weight ratio : 361 bhp (269 kW; 366 PS) per tonne


271 HP! NICE, even boosted with that high compression ratio, wow

(http://cache-02.gawkerassets.com/assets/images/gallery/12/2007/03/medium_412442830_92ad85715e_o.jpg)

(http://cache-02.gawkerassets.com/assets/images/gallery/12/2007/03/medium_412443453_74cd5cee35_o.jpg)
Title: Re: Lotus releases 271hp Exige GT3
Post by: Sirdeuce on November 25, 2010, 11:02:58 PM
11.5-1 comp ratio? You read that right? What does the supercharger do? Reduce the manifold pressure? 11.5-1, with what boost?
Title: Re: Lotus releases 271hp Exige GT3
Post by: BigMike on November 26, 2010, 10:34:53 AM
Yeah, it seems strange to be boosting on atop of 11.5:1. Why don't they drop the compression to like 9.5:1 and then run 20+ PSI boost?
Title: Re: Lotus releases 271hp Exige GT3
Post by: Sirdeuce on November 26, 2010, 12:32:25 PM
The Mazda runs a 9.5 compression with a max boost of 18psi! Boosts to 15.7 in 3,4,5 and 6, limits to something like 12 lbs in 1 and 2. May be possible to boost 11.5 comp with a lot of tuning magic.
Title: Re: Lotus releases 271hp Exige GT3
Post by: BigMike on November 26, 2010, 02:23:13 PM
I guess Toyota isn't interested in making a special low-compression-tailored 2ZZ for Lotus, so it would be up to Lotus to swap out pistons, which would be a lot of work and would void any Toyota warranties for sure....