Rumors I heard are that they might have a 6 cyl in it. I can't see them getting that out of the yota engine.
Chris
Chris
Exige Rumors?
1 - 20 of 52 Posts
Hmm, very interesting! Just when I thought all the wild rumors and speculation were over, the Exige nears the horizon... 
I do not believe even Lotus can get 300bhp from a normally aspirated 1.8 liter 4 cyl. They must be talking about a turbocharged engine if they are using the Toyota block.
The only way a normally aspirated engine can make significantly more power is either through 1) more displacement 2) higher compression 3) more revs.
Consider the engine already has a redline of 8500RPM. To make 300 BHP they would need 10,000RPM at least. I don't think even Lotus will be capable of that.
To gain 300BHP normally aspirated, I think the engine would have to be so radically changed, they might as well pick a different engine. A 50+% power increase for an already highly tuned engine would be very challenging...
DLY
The only way a normally aspirated engine can make significantly more power is either through 1) more displacement 2) higher compression 3) more revs.
Consider the engine already has a redline of 8500RPM. To make 300 BHP they would need 10,000RPM at least. I don't think even Lotus will be capable of that.
To gain 300BHP normally aspirated, I think the engine would have to be so radically changed, they might as well pick a different engine. A 50+% power increase for an already highly tuned engine would be very challenging...
DLY
I hear rumors of a supercharger.
From a heat and packaging standpoint, a supercharger would make more sense than a turbo, AFAIK. Besides, we want the low end power.Randy Chase said:I hear rumors of a supercharger.
Jeff
Forced induction and 10k rpm? I don't think so...I swore I read somewhere that a turbo or supercharger is a difficult set-up for the Elise because of space constraints for proper cooling.
I'm all for it happening if they can do it
I'm all for it happening if they can do it
FI and 10krpm actually makes some bit of sense. Fortunately it makes sense in the "superchargers are useless" direction (yeah I like turbos ). Put on a moderately sized turbo with a fairly free flowing system and an engine turning at 10krpm will spin it up like nothing. Of course turbo lag down low may be an issue.
Ok lets go back to the bike example again. There are plenty of CURRENT model japanese bike doing the 140hp range in 1l of space. My bike does 108 rear wheel stockwith an engine rating around 114hp, and it is a touring bike! The 999 produces 123hp stock, with a few mods its in the 140hp range.
Remember without any kind of vvti, and retain the huge amounts of torque in 1l twins. Almost doubling the displacement, slightly higher compression ratio, adding in vvti and you should easily be able to double the bikes hp NA. IMO its going to require cam changes, and some random headwork. I dont know what people think about the valves as they currently exist if they restrict airflow or whatever. Maybe they are a major restriction, maybe not. My guess is still that 260 in an exige at 10krpm WITHOUT going for a turbo should be possible for a vvti system with a proper cam setup and some fairly radical valve/head setups. Maybe even up the compression ratio by a small amount. Remember, lotus does have the mechanical ability to scrap the stock head and do up their own, even if that isn't the norm.
Scot
). Put on a moderately sized turbo with a fairly free flowing system and an engine turning at 10krpm will spin it up like nothing. Of course turbo lag down low may be an issue.Ok lets go back to the bike example again. There are plenty of CURRENT model japanese bike doing the 140hp range in 1l of space. My bike does 108 rear wheel stockwith an engine rating around 114hp, and it is a touring bike! The 999 produces 123hp stock, with a few mods its in the 140hp range.
Remember without any kind of vvti, and retain the huge amounts of torque in 1l twins. Almost doubling the displacement, slightly higher compression ratio, adding in vvti and you should easily be able to double the bikes hp NA. IMO its going to require cam changes, and some random headwork. I dont know what people think about the valves as they currently exist if they restrict airflow or whatever. Maybe they are a major restriction, maybe not. My guess is still that 260 in an exige at 10krpm WITHOUT going for a turbo should be possible for a vvti system with a proper cam setup and some fairly radical valve/head setups. Maybe even up the compression ratio by a small amount. Remember, lotus does have the mechanical ability to scrap the stock head and do up their own, even if that isn't the norm.
Scot
1 - 20 of 52 Posts
