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Learning how to build Lotus Seven replicas...together!
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PostPosted: November 18, 2009, 8:49 am 
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Ford sidevalve, 30-48bhp
Austin BMC Sprite A-Series, 948cc, 37-43bhp
Coventry Climax OHV, 1098cc, 75bhp
Ford CVH, turbo optional, 1.6, 105-136bhp
Ford Kent Crossflow OHV, 1.3-1.6, 84-135bhp
Rover K-Series, 1.4-1.8, 126-230bhp
GM/Vauxhall 1.6 OHC (Appears to be a late 80s-early 90s GM FWD J body engine)120bhp

Lotus Twincam 1.6 DOHC,115-126bhp
GM/Vauxhall 2.0L DOHC, 165-235bhp
GM/Vauxhall 2.0L DOHC Turbo, 300bhp
Zetec DOHC, 135bhp
Cosworth DOHC, 160bhp
VTA DOHC (custom DOHC head on 1.6 Crossflow), 126bhp
Holbay 1.7 DOHC, 140bhp
Honda Fireblade / 919, 125-150bhp
Honda Blackbird /CBR1100XX, 170bhp
Ford Duratec 2.0-2.3L DOHC, 170-263bhp
Factory Tuners:
Cosworth
Holbay
Vegantune

Other points of interest:

1958 Rack and pinion steering
1962 Front disc brakes (9.5”)
1970 Fiberglass hardtop and doors option
1976 Alloy wheels as an option
1985 De dion rear option
1986 rear sway bar
1987 electrically heated windscreen and chassis powder coating
1988 Rear disc brakes (9”)
1989 Prisoner Edition, 15” wheels, aluminum fuel tank, smaller chassis tubes.
1993 Allowed to sell fully built-previously only in kit form.
1995 6-speed option
1996 10” front discs with 4 piston calipers option.
2000 Blackbird power option

All floating front fenders mount on bent tubing (appears to be at least 1/2” OD) versus transitioning to .125” flat strips at the fender (as illustrated in Champion’s book).

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Last edited by Miatav8,MstrASE,A&P,F on November 18, 2009, 9:19 am, edited 2 times in total.

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PostPosted: November 18, 2009, 9:00 am 
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And the Duratec. 150-270hp?


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PostPosted: November 18, 2009, 9:22 am 
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Fixed. What else did I miss?

May want to move this to the FAQ.

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PostPosted: November 18, 2009, 10:35 am 
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Interesting engine choices by lotus/caterham. I'd personally love to get my hands on a cosworth tuned motor.

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PostPosted: November 18, 2009, 5:10 pm 
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The early 90s duratec 2.5L v6 seems like the best compromise as far as weight, rpm range, power level, fit, and cost.

I think any sohc or dohc with a short stroke would be fun.

Here is the fwd j-body engine that was also used in the seven. This appears to be a 1990 turbo sunbird but still the standard engine for these cars. The seven version was a 1.6 instead of a 2.0L; probably a shorter stroke. The bellhousing pattern is the same as the v6-60.


Attachments:
sunbird turbo 2.0l.JPG
sunbird turbo 2.0l.JPG [ 54.51 KiB | Viewed 7790 times ]

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PostPosted: February 8, 2011, 11:52 pm 
Couple of issues : Lotus was ALWAYS optimistic about the power outputs of it's engines.. often by 25% !
Having said that, 100 'real' hp in a 7 is a Seriously Fun amount of power.
A nice balance between handling and acceleration ..where one needs a small bit of practice and ultimately Skill (a 4 letter word !) to get the car quickly around a track. Big power is odd at best and one can easily find that already available in a myriad of new/used cars, why go to all this trouble just to build a point and squirt car :lol: ?


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