super charging 18RGEU

[dale30]

Hi Guys
I have finally given up on the 18R and just bought an RGEU.88270 stock and original.
This is for a speedway car and will run between about 4000 and 7000 rpm, most at WOT so drivability isnt an issue just accelleration.

Torque is also not important as that just causes wheel spin in my sport.
Eventually i wouldlike to be getting about 200 at the flywheel.Budget at the moment is about $1.50.

The way i see it i have two choices.

If i can find a manifold i can put the solex's on. But with the crappy cams and and 8.3 comp im not sure how well it will go.

OR

8.3 should lend itself to supercharging.!!
I can get a s/c setup for a 2.6 sigma with 350 holley.with some modification i could replum it back into the efi manifold. S/C is setup to run 12psi.

Flywheel will be lightened before it goes in. not to much though.

I only have 4 weeks until next race meeting so have get it going then do more mods as budget allows. Cams would be first on the shopping list.

So there you have it, Im open to all suggestions.

Also dissy is probably no good to me without ecu so can i use my 18r dissy.? i read somewhere about using internals from 22re if true i can get one of those..What else do i need from 22re to make it work.??

[ed]

if its WOT and 7000-9000rpm - id just get a wellmatched trubro

[dale30]

Turbos are crappy on speedway, Throttle response is every thing as your feathering it around a corner.
7500 would be as high as i would need to go.Unless the motor would be happier up higher,I could change diff gears.

[Lambolica]

You can use an SC14 off a 1G and if you can find them an A/C mount to mount it on.

From there a little custom work to line up the pulleys would be about the most budget way to go.

[ed]

i dunno... on a speedway, given the sustained load and rpm, a turbo bang in its efficiency range would be pretty responsive (this coming from the #1 turbo hater of all times) look at those drifting clowns in their puncy cars, they achieve exceptional throttle response - the key is maintaining operating conditions

*says me who hates turbos and has never a driven speedway event

[dale30]

A turbo i would have to go and buy ...A supercharger i can get for nothing.
Superchargers dont need intercoolers either..more money.

Anyone know what sort of power 12psi into RGEU would make.???

[ed]

true true...

[pilot]

I have literally no experience with superchargers and a doubt showed up: does a supercharged heat up less the air charge than a turbocharger at the same pressure/flow?

I have seen superchargers using intercoolers but just in pictures. I´ve never really studied it nor seen it alive.

[dale30]

The heat from the exhaust side of the turbo is what causes it.

[pilot]

I don´t want to pollute this topic too much, but are you sure it is a noticeable source of heat for the air charge? I would have thought that if there is a difference it might be beacause of the difference in compressor type (centrifugal, positive displacement, etc).

[ed]

The heat from the exhaust side of the turbo is what causes it.

oh really?

[EldarO]

yeah...

















nah.

Eldar.O.

[Starfire]

The 18rg is fairly ping prone. At 8.3 with 12PSI I think you might have some trouble. If you lower the boost or drop the compression (thick head gasket anyone?) you might be better off.

Get an intercooler. Even a crappy one from a standard car is better than nothing and can be had quite cheaply. They make a massive difference.

Sean (bluewire) has experience in supercharging an 18rg. He did it to an RA40 Celica. I think his compression was particularly low though (around 6 to 1).

Cheers,
Terry

[dale30]

OK
If i run it on methanol that should overcome the pinging problem.

[RA35GT]

Heya mate,

The 18RGEU has a conventional reluctor dizzy, it does not need the ECU to work.



The Light Brown wire is an ignition 12V and yellow wire is the tacho wire.