Optional Rally spec Turbo for EA82T ?

discopotato03 · Post by **discopotato03** » Fri Apr 25, 2008 10:41 pm

Hi all , a number of people inc Stuart Wilkins have told me that there was a kit you could buy from Subaru in the mid late 80's if you wanted to build an RX Turbo rally car .

In the kit was a rally spec turbocharger and I'm curiuos to know if anyone has any details like part numbers on them .

Cheers A .

Gannon · Post by **Gannon** » Fri Apr 25, 2008 11:44 pm

Yeah there was, i have half a .pdf that contains info about it. I just have to upload it

The kit included a Turbo, Hi Flow Exhaust pipes, an ECU capable of 177HP and a firewall strengthening kit.

All parts have Subaru part numbers

Ive gone to the SUBARU dealer and presented the part number for the 'Rally Spec' 177HP ECU but it didnt exist on their books. Must have been special order stuff

discopotato03 · Post by **discopotato03** » Sat Apr 26, 2008 12:37 am

Stu said that it also had different bushings for the rear crossmember to stop it moving around or should I say flopping around .

He said he thinks he still has the paperwork that came with the kit but has to dig it out .

Cheers A .

schultzie · Post by **schultzie** » Sat Apr 26, 2008 7:43 am

me wantie... i have seen this document before on the old forum

it even had all the tolerances for the motor and where to shave bits off for more power...

hey disco, are you going to run an after market ecu?

Gannon · Post by **Gannon** » Sat Apr 26, 2008 9:15 am

I knew i had it saved somewhere,...

'Right Click' and 'Save Target As'

discopotato03 · Post by **discopotato03** » Sat Apr 26, 2008 11:14 am

Interesting , no details of the turbo though .

I did some searching on VF8/10/11/12 RHB52's and TD04's and TF035's to see what was around the same sort of power out put as the 180 odd Hp rally RX turbocharger .
I don't think its too difficult to improve upon the std VF2 or VF4 particularly if you make a better header manifold .
I'm going to have to talk to Bret at GCG to find out whats available and practical to build . My preference is for the most modern turbine going and set the compressor up for the desired airflow/power .

Engine management ? Well I'm probably going to have to modify one of my Spider manifold plenums to take a std L series throttlebody and TPS , that way either 3 plug or 4 plug type TPS's can be used . Early EJ inlet manifolds stand their throttlebody a bit back from their plenum chamber so it should work with a spider and L throttlebody in an L series . The spider type throttlebody and TPS was all about packaging things in the Vortex's engine bay no not as easy in a n L series . Ways and means ...
Mine is an 86 flap AFM type system and in time I'd like to convert it to the 4 plug hotwire system . The early system uses a mechanical/pressure distributor where the later one is a distributor with a crank angle sensor inside it . The later system is easier to "tune" because it doesn't change maps as the TPS micro switches open and close .

Out of time , cheers A .

schultzie · Post by **schultzie** » Mon Apr 28, 2008 8:16 am

u ****ing beautie.... a ditsy with a crank angle sensor in it... thank you...

i need one of these people....

the stock computer is going to hate you with all these mods. have you not thought about running a wolf? ill happily give you my maps if u decide to...

schultzie · Post by **schultzie** » Mon Apr 28, 2008 8:19 am

also the standard tps is an on off type... i think there is an early celica that is a better option and or buy one...

Outback bloke · Post by **Outback bloke** » Mon Apr 28, 2008 9:55 am

Have you considered using a VF28 on your engine? It is an STi turbo and is probably the fastest spooling turbo you will find in a standard option. I think it would run very well on it.

discopotato03 · Post by **discopotato03** » Mon Apr 28, 2008 11:51 am

I'll look at VF28's but RHB52's are simpler to make alterations to and plumbing wise are all pretty similar - the water cooled ones anyway .
Yeah I know flanges are different but once you flick the VF2/VF4 ones for the EJ type ones lots of things can bolt up .

I would be the first to vote in favor of ball bearing center sectioned turbos but the wheels and housings have to be about right and BB turbos are expensive to experiment with if it's not to your liking first or second try .
At least with bush bearing turbos you can make compressor and turbine wheel changes and only pay for the bearings and a balance .

I should add that because lots of ocean went under the bridge since the late 80's the rally spec EA82 turbo is probably quite crude by todays standards and possibly not so good in a road application . Like everything else engineering thinking is constantly changing and its the same for engines and turbochargers .

Cheers A .

twilightprotege · Post by **twilightprotege** » Mon Apr 28, 2008 10:21 pm

looking through the rxmodmanual file, it says the timing for using 98 octane can be set to 22degress btdc +-1 (ie vaf, not maf) - knowing how well turbo cars respond to timing, would that be a better base setting for a rx running on 98ron premium (rather than 20)?