Cams and power.

[ollieboy]

I have an odd question: Is it possible to get new cams for a 4age that will put the power down low and none up top?

I'm not wanting the engine to go over about 3000rpm but even that is too high for the application.

Reason I ask is I have found a silvertop 4age for very cheap and it was an idea I had but if it can't be done will look for a more suitable engine.

Cheers
Ollie

[Dell'Orto]

So basically you're wanting an uber torqey motor to use for towing/burnouts? Yes you can get the cams reground to make more low end torque, but you wont get stump pulling power from a 1600cc motor.

[ollieboy]

Oh sorry, forgot to mention, not for a car. If I changed cams would I need an aftermarket ecu?

[Mr Revhead]

i think letting us in on the application will allow more ppl to give helpful answers

low revs and more torque....
look for a bigger motor
lor one with a lot more stroke

[sergei]

what about gearbox? just run it at 5500rpm with stock cams .

[ollieboy]

whoops, not on to it today, I was going to say in my first post what it was for then forgot.

It's for a microlight, I don't want to use anything bigger because it gets a wee bit heavy and also I've been offered this 4age for $150 which is cheap anyway. Too higher revs the propeller goes supersonic which isn't very good for the propeller or power apparently.

It was just an idea because its such a cheap buy for the engine. The other option is to gear it down but that adds weight too.

I haven't talked to the guy who's helping me build it yet about the 4age but he said just get some ideas on engines and we'll work something out when it comes to it.

[Mr Revhead]

i think a 4age will be to heavy

[solitaire]

what about a 4afe? you can just swap the head cant you?

[Adamal]

Just get a Rotax engine. They're designed for high altitude and low density air.

[Mr Revhead]

i think an air cooled 3-4 cyl 1000cc motorbike engine would be a better place to start

[ollieboy]

Good point on weight- How much does a 4age weigh anyway? We had a look at a snowmobile engine which I guess is similar to a motorbike engine but it revved way too high.

The guy whos helping me has a three cylinder charade engine in- he uses his to get to work everyday in summer when its fine.

[ollieboy]

I just rang him then. He said he has seen it done before with a 4age but it was geared down and more hassle then it was worth, it was a 16 valve though but I guess that doesn't make a difference.

Ah well, cheers for your help guys and I will have a look at a few motorbike engines and I've never actually heard of rotax engines but i googled it and i got a few ideas. Thanks

[frost]

buy a crashed ninja and rape the engine from that.

[touge rolla]

how about a slightly larger but alloy engine. a friend of mine is building a "helicopter" (he is going to kill himself) and is using an ej20.

[strx7]

I'll sell you a 1.5 Suzuki Engine for your microlight.
71.34 kw @ 6000 rpm
125 Nm) @ 3200 rpm
SOHC 16V MPI all up running weight is around 60kg

Have supplied one of these recently for a microlight.
IF thats slightly too heavy or powerful for you I could also do a 1.3 which makes 62.52 kw) @ 6000 rpm and 110Nm @ 3000 rpm
these are about 5-8 kilos lighter

[ollieboy]

That second one sounds good. I'll have a think about it, cheers man. Only problem would be shipping but I'm sure that wouldn't be too bad.

[d1 mule]

hate to say it what about a k series? at least ya know it will never die on ya lol

[ollieboy]

It needs to have at least a little bit of power though.

[RedMist]

If you are want torque, low RPM and light weight you can't go past air cooled. A VW H engine is where you want to head. They have been used in aircraft applications for years and have aviation kits available for them.

[strx7]

That second one sounds good. I'll have a think about it, cheers man. Only problem would be shipping but I'm sure that wouldn't be too bad.

We've shipped, axles, engines and even CHASSIS's WORLDWIDE!!!!!
we send engines etc all around the country on a regular basis.