Lightest 4-cylinder N/A engines?

[Überdub]

Doing a bit of research for a project and I'm curious as to which are the lightest modernish (ie. not Hillman Imp ) engines out there?

Has to be normally aspirated, capacity in the region of 1.3 to 1.8 and good for a easy and reliable 150+ bhp.

I can think of a few obvious choices but I've no idea how they figure on the scales.

Thanks.

 

[Mk2Dubber]

Surely it would have to be a bike engine as used in near every kitcar.

 

[the fonze]

a bike engine hyabusa or the like or they are plenty of alloy block car engines that are fairly light, 1.7 puma engine should easy see 150bhp with not to much work and are very light but can be a little soft.

 

[Al-mera]

Nissan Pulsar Vzr engine SR16VE. Get about 175bhp out of it (1.6) standard.

 

[fiestasi]

Honda B16B 185bhp 1.6 Standard

 

[Überdub]

Surely it would have to be a bike engine as used in near every kitcar.

Doh ... forgot to mention it has to be from a car!

Must be light ... lightest one I know of of Suzuki Twin-Cam 16v which produces 100bhp in the Swift GTi. With a gearbox they come in at about 90kg.

 

[Überdub]

Honda B16B 185bhp 1.6 Standard

Thanks but I don't think the V-Tecs are all that light.

Nissan Pulsar Vzr engine SR16VE. Get about 175bhp out of it (1.6) standard.

Sounds interesting. I'll have to see what they weigh.

 

[_ZS_]

K-series? *twitch* 105hp from totally standard 1.4, just slap in a proper head gasket and you should be cooking. It was designed to be small and light (for Rover's Mini replacement that never was).

 

[Gambit]

you'd be looking something all aluminium

 

[pablo]

K-series? *twitch* 105hp from totally standard 1.4, just slap in a proper head gasket and you should be cooking. It was designed to be small and light (for Rover's Mini replacement that never was).

1.8 on throttle bodies, 190bhp ftw

 

[12345678]

Nissan Pulsar Vzr engine SR16VE. Get about 175bhp out of it (1.6) standard.

the block in them is supposed to be quite heavy. i can remember hearing that is very similar in size to the 2 litre block

 

[Mark_C]

Peugeot/Citroen Mi16 1905cc - 160bhp standard with no fancy valve timing required, all alloy (Later ones had an iron block)

Capable of good outputs.

 

[Al-mera]

the block in them is supposed to be quite heavy. i can remember hearing that is very similar in size to the 2 litre block

Your prob right. As you can interchange parts like put a ve head on a SR20de etc. Although the N1 SR16VE is 197bhp but like hens teeth.

 

[Coog]

Rover 1800 K series with the VVC

No idea on weight but the lotus version is close to 200bhp AFAIK

EDIT: Wikipedia threw this engine code up: DOHC K16 VHPD & its 192bhp apparently.

 

[mic]

toyota 2zz engine as fitted to celica 190,toyota t sport corolla etc and now to the latest lotus--afaik its circa 192 hp, tunable to well over 200hp and can be supercharged up to 280 or so

Its all aluminium engine or if your looking for less power the 1zz engine is circa 140bhp

Both are 1800 cc

 

[TheLarneMan]

Peugeot/Citroen Mi16 1905cc - 160bhp standard with no fancy valve timing required, all alloy (Later ones had an iron block)

Capable of good outputs.

ALLOY BLOCK Mi16
Engine weight (dry, no flywheel) 112.6Kg
Engine weight (dry, with flywheel) 121.6Kg
Engine weight (dry, with flywheel, alternator & starter) 132.7Kg

Taken from here:
Untitled Document

 

[Paul RS]

Ford 2.0L duratec is rougly 100Kg including anclis, flywheel and sump

And better than an Mi 16

 

[Cess]

Bound to be, its a more modern design.

 

[the fonze]

1400 and 1600 ecotecs from a corsa sport are a compact wee engine as well with great torque figures and tunablity.

 

[Mark_C]

may be more modern, but its not necessarily better. the XU9J4 has a very advanced head design, and massive valves as standard - seeing as how it was developed for the group-B turbo-16 engine.

what is the duratec's power output in standard tune? And its also 100cc bigger in capacity. Its certainly more popular, because there are a load more of them made.

The Mi16 is still in some use today in the rally world - eg the 206 WRC

 

[mechanix]

may be more modern, but its not necessarily better. the XU9J4 has a very advanced head design, and massive valves as standard - seeing as how it was developed for the group-B turbo-16 engine.

what is the duratec's power output in standard tune?

150bhp or so

 

[svensktoppen]

Rover 1.8, easily 150-200, up to 250+ in race tune. Or Honda, easily 200+, 300 in race tune. Both reliable, loads of bits for either, plenty of tuners around.

Rally boys use Ford engines a lot, as do a lot of Kit cars.

Have no idea what either these are like weight wise.

 

[chunky]

surely old alloy 8valve engines would be the lightest ... 1905cc alloy 205 gti engine or 1.6 ..get 150bhp from both of them im sure

 

[PeteMoore]

Rover K-series as mentioned is one of the lightest i have ever worked with

Honda K20a is as light if not lighter than the b-series (200+hp very easily)

Starlet Turbo lump - not sure on details, or weight, but just an idea

 

[alan_d]

I was going to suggest the venerable 4efte as their of good abundance, but then remembered its NA your after :/

if you fancied doing a build, get a 5efhe, forge it, strap on a Disco potato, and laugh lots.

Alternatively im shocked to see no one mentioning the Rotary engine, originally intended to be light for aircraft, and can be ported to see more power, add throttle bodies and your on a winner!!!!