Supercharger + Turbo

[denis]

just curious, why not do away with the precups altogether which would allow you to run extreme amounts of boost due to the lowering of compression ratios and just use liquid fire to start the thing in the mornings...
or am i way off base here?

I think you won't be able to make it idle below something like 2500
The high compression ratio is evil for chasing performance but absolutely vital for starting and idling. Of course for a pure drag truck it wouldn't matter that much.

 

[crushers]

okay but if you took the head and had a decent machine shop weld a sleve into the area where the precup was then you could adjust the compression accordingly without the worry of the precup falling into the engine.

now bruce has a point about where the engery will be made, in this case the piston will take the abuse but then the engergy is already trying to go out through a small hole to drive the piston downward so i am not sure if that will end up being a problem or not.

i don't think i would be doing this to a street truck but a off road race rig could be a blast to drive...
cheers

 

[Greg_B]

As far as mounting things up goes, I was planning to make a new intake manifold (basically two plates with four intake runners joining them) and mount an Easton t-90 in its side right on the side of the engine. Then my intercooler would actually live up it its misnomer and supply cool air right into the end of the blower. A constant 6 psi from the blower would make the of idle torque amazing and then add the 20 PSI from the turbo as it spools. Should kick butt.

Ya baby...

...would not have to add a second fuel like propane, or an oxygen giver like nitrous, but could you imagine if you did...

gb

 

[Gold Boy]

Man seems like a lot of work for some boost?

Is nitrous not simple?

GB

 

[R2HKS]

Nitrous is out of the question here because its not legal to run on the street. However the propane setup is tempting especially reading about the possible 50% gain.

The 1GGZE blower is basically the equivalent of an Eaton M90. The other option is to get an Eaton M110 off a Commodore here or in the states known as a Pontiac GTO, though the GZE blower is very cheap only about $350 Aus. The mounting problem still remains though as my rig of course has the alternator/vacuum pump and power steering. It would probably need to be mounted either very low on that side or high mounted on the injection side.

Max safe revs for the GZE blower is around 12,000rpm. Though some run it as high as 14,000rpm. So that equates to an easy 3:1 pulley ratio, if say I was going to run the blower to 4k rpm or if I switch it to turn off at lower revs like 2,500rpm I could go for a 4 or 5 or if adventurous even 6:1 I have seen a guy put one on a 3B out here before. The blower has its own separate oiling system and as I said an electro magnetic clutch which makes it unique as blowers go enabling it to switch on and off. It was designed this way so when cruising the clutch comes in and the blower free spools.

The beauty of this setup is you can have heaps of power or run it back to stock again by switching off the blower. I'd also run a boost controller just for the turbo.

I think the main prob will possibly be running out of fuel and needing bigger injectors. I see Peter has his fuel turned all the way up.

As far as IC's go I'm definitely leaning towards water to air and not sure whether I'd run a twin IC setup, more than likely.

Exhaust wise will be a 4" mandrel bent. Depending on the chosen turbo, if I go with an external wastegate, the wastegate dump pipe will merge atleast a foot down into the 4" turbo dump pipe, into the 4" exhaust and I'll definitely see how loud it is without a muffler.

 

[crushers]

that definitely sounds like a fun ride although i like quiet so the 4" open doesn't turn my crank as much as yours...
cheers

 

[bigbrowndog]

I don't know if you have heard of a product here called "Start Ya Bastard" Basically its an aerosol can you spray into the combustion chamber/intake usually used on carby gassers to get them started. I wonder if I could hook something up like that and just replace the can or top up a resevoir, which could give a couple of squirts of basically alcohol I think it is to start it.

Hmm now you have me thinking about ditching the precups and making a different starting system.

"Start Ya Bastard" has 24% Ether in it, so the valves are not going to last long the way it rattles them and pre combusts.It is for diesels also but you are not to use the glow plugs if you use it for starting.I always carry a can,easier to give it to someone stuck in a creek than tow them out.

 

[Tapage]

The SC swith on and of sounds to me a lots of fun .. ! to me.

Think a little bit about this .. mud hill no one can reach the top of the hill so you try it with out SC .. and .. can't ..

But again second try .. with SC ( but only you know the secret ) and you reach the hill .. !!!!!!

Yap I know .. sometimes I'm a child ..