Peter T Posted December 7, 2003 Share Posted December 7, 2003 Consider a budget of 20K for an engine, 5K for the Box, and say 5 K max for sundries, what given your theoretical fitment in a 7 would you go for ? Please don't answer with stupid options of rocket/ Turbo power, as i am looking for genuine comments . Really looking for 320bhp +, but not huge amounts of torque. V8 bike derived engines are begining to look feesable, Has anyone heard such cr*p as this new Cryogenics claims to be Founder Member of The Twisted Prop Club. Link to comment Share on other sites More sharing options...
Big Brother Posted December 7, 2003 Share Posted December 7, 2003 Titanium plated Crossflow (with a 4 speed box) *tongue* Steve Se7en-Up! Not going to you know where with you know who in 2004 😬 Link to comment Share on other sites More sharing options...
edmandsd Posted December 7, 2003 Share Posted December 7, 2003 Peter, Ignoring v8 bike engines until they're proven in terms of power/reliability and concentrating on a 2lt capacity i'd suggest in this order.... BMW 12/7 2lt F2 engine - There was one for sale via a blatchat thread recently that was just rebuilt for £16k - 300-320 bhp apparently. Mike Barnby runs a genuine 270 bhp Hart420r in a single seater which isn't at the highest state of tune but he says that the BMW engined cars go past him like he's going backwards on the straights and he can't hear his own engine over their induction noise. Trouble is there are only two reputable engibe builders in the world apparently and one's in France the other's in Italy. Other drawback is that these engines use an iron 2002 block which isn't the lightest. Hart420r - c 300 bhp - although you may have problems fitting it. 2lt Ford Cosworth BDX - 280-290 bhp. Home of BDR700 Link to comment Share on other sites More sharing options...
Swiss_Tony Posted December 7, 2003 Share Posted December 7, 2003 Peter How about one of these 😬 James Su77on Se7ens Link to comment Share on other sites More sharing options...
Swiss_Tony Posted December 7, 2003 Share Posted December 7, 2003 Peter I heard from a guy in the pub that this ultimate engine could be bought for £20000 James Su77on Se7ens Link to comment Share on other sites More sharing options...
paul w Posted December 8, 2003 Share Posted December 8, 2003 How about a mildly tuned 13B turbo? An easy 320BHP with not too much torque. You might have a bit of trouble spending the whole 20K though........ ☹️ Link to comment Share on other sites More sharing options...
Bare Posted December 8, 2003 Share Posted December 8, 2003 Suggest a HONDA s2000 engine drivetrain ..240 hp at 8300rpms.. while meeting ALL emmisions regs and (in the Honda Car at least a 5 year 'no questions asked' warrantee) Plus the 6 speed shifts a LOT better than the Cat thing. Link to comment Share on other sites More sharing options...
Bare Posted December 8, 2003 Share Posted December 8, 2003 Suggest a HONDA s2000 engine drivetrain ..240 hp at 8300rpms.. while meeting ALL emmisions regs and (in the Honda Car at least a 5 year 'no questions asked' warrantee) Plus the 6 speed shifts a LOT better than the Cat thing. Link to comment Share on other sites More sharing options...
Peter T Posted December 8, 2003 Author Share Posted December 8, 2003 James, i said a PROPER engine, not of the wahing machine variety 😬 Dave, Hart Block is too Tall, allready thought of that fitment ! Founder Member of The Twisted Prop Club. Link to comment Share on other sites More sharing options...
Joe 90 Posted December 8, 2003 Share Posted December 8, 2003 Why "not too much torque" For £20K I'd get one specially made, non of this adapted/modified/compromised stuff. I'd specify a wide angle V6, dry-sumped, so that it has really low centre of gravity. As it would be short, you could jack it backwards and forwards to alter weight distribution (mind you, it would be so light you mignt not notice 😬) I will be on the road by Christmas. Photos here Link to comment Share on other sites More sharing options...
Jason Plato Posted December 8, 2003 Share Posted December 8, 2003 You may consider talking to QED about the KV6 they are building . I understand it fits in the bay and will make around 280bhp reliably . Has anyone any thoughts on a Millington Diamond 2.3l ?? . These go like the clappers in Mk2 Escorts ?? , believe the power to be around 275 bhp ? in mild tune . In order to get 320bhp + from an engine that fits in the engine bay , then I think forced induction may be required ?? . But then this brings its own packaging problems . Nice problem to have on your hands though Peter 😬 Lotus 7 Club Speed Champion 2003 South Wales Area Organiser C7 TOP Link to comment Share on other sites More sharing options...
Peter T Posted December 8, 2003 Author Share Posted December 8, 2003 Oliver, chassis will not handle oodles of torque, the 7 chassis has it's limitations . Dave, the Millington Diamonds from what i remember are based around the Hart block. Founder Member of The Twisted Prop Club. Link to comment Share on other sites More sharing options...
Alex Wong1697456877 Posted December 8, 2003 Share Posted December 8, 2003 Why would the chassis handle torque at high revs (ie power or BHP) but not torque at low revs? Link to comment Share on other sites More sharing options...
Peter T Posted December 8, 2003 Author Share Posted December 8, 2003 Alex, it's not BHP that rips diffs, props and other mechanicals appart, only torque and lots of it, when engines are forced inducted torque is multipliead vastly compared to bhp, as the 7 is very light it does not need an hammer to get it going, so huge amounts of torque are not required. Founder Member of The Twisted Prop Club. Link to comment Share on other sites More sharing options...
Bill Shurvinton Posted December 8, 2003 Share Posted December 8, 2003 6k will get you a 340HP NA 13B rotary. A little more could get you up to around 380 at 12000RPM. There was one at the 340HP spec running in a W* a few years back. Was too fast and so was banned. With a dry sump the engine is rediculously low in the chassis. Minus points. Louder than a loud thing. Chugs gas like a tank, ermm, not much else really. Or you could go for lower RPM and a 3 rotor engine. Again about 6K will get you to around 320HP, but at much lower RPM. Link to comment Share on other sites More sharing options...
Peter T Posted December 8, 2003 Author Share Posted December 8, 2003 Are we talking ****el engine here Bill ? Would Rather keep with good old fashioned Pistons Thanks ! Founder Member of The Twisted Prop Club. Edited by - Peter T on 8 Dec 2003 10:31:52 Link to comment Share on other sites More sharing options...
Peter T Posted December 8, 2003 Author Share Posted December 8, 2003 Wow , weird or what the system will not let me type rotor type engne named after the bloke who egineered it Founder Member of The Twisted Prop Club. Link to comment Share on other sites More sharing options...
RESOLVIWOLF Posted December 8, 2003 Share Posted December 8, 2003 nsx engine Link to comment Share on other sites More sharing options...
Peter T Posted December 8, 2003 Author Share Posted December 8, 2003 As in Honda ? this is an old design and is not that light . Founder Member of The Twisted Prop Club. Link to comment Share on other sites More sharing options...
Irrelevant Posted December 8, 2003 Share Posted December 8, 2003 I've often wondered what makes the E30 M3(S14 from memory) BMW engine unsuitable for a Cat. The 2.5 M3 sport evo engine is fabulous - powerful, compact, OK a bit heavy I guess, but dry sumped I'm sure it would easily fit in. 238bhp as standard with the restrictive induction/ecu. They'll go to 275bhp without too much spend (cams and porting) and the factory gpA race engines were good for 375bhp. J351 TPE . . . battered old X/Flow Link to comment Share on other sites More sharing options...
Peter T Posted December 8, 2003 Author Share Posted December 8, 2003 Appart from the Exhaust would come out on the drivers side ! The reason why all E30 M3 were left hand drive was because the steering rack would not clear the exhaust primaries. Founder Member of The Twisted Prop Club. Link to comment Share on other sites More sharing options...
Irrelevant Posted December 8, 2003 Share Posted December 8, 2003 Peter T: Some E30 M3 were converted to RHD so there's no problems with the exhaust. The steering was never as good though because conversions had to use standard racks - the E30 motorsport rack only came in LHD. E36 M3 RHD motorsport racks can be modified to fit though. . . . anyway, back to Caterhams.... In a Cat you'd fabricate a manifold to clear everything so it wouldn't be an issue. The exhaust comes out the drivers side with a Duratec remember. J351 TPE . . . battered old X/Flow Link to comment Share on other sites More sharing options...
Peter T Posted December 8, 2003 Author Share Posted December 8, 2003 I would prefer the exhaust was on the n/s, wich reduces noise in my ears 😬 Founder Member of The Twisted Prop Club. Link to comment Share on other sites More sharing options...
JimB Posted December 8, 2003 Share Posted December 8, 2003 Hart 420R with 2.8 conversion, as used by hillclimbers, ought to make a fantastic 7 engine. Link to comment Share on other sites More sharing options...
Peter T Posted December 8, 2003 Author Share Posted December 8, 2003 I think i might have solved it,have found a very nice unit, good capacity, all alloy very strong, light ,good output in standard form and probably not to expensive, can't say to much yet, as what i have seen is not for resale yet, and i should not have seen it as it is the only one in the country Founder Member of The Twisted Prop Club. Link to comment Share on other sites More sharing options...
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