carby fed turbo

[turbo-hatch]

just a question... has any one turbo charged a normally aspirated 550?

im in the process of fitting a mitsi minicia turbo, custom made exhast manifold will all the trimmings to my 83 hatch.
now i am looking at pumping 4-6 pound thru the carby ( blow thru), have made the pipes, just wondering if any one has done this and if the have incountered any problems. ( i am using the 800's carby to keep the fuel mixtures up on the rich side.....)

any pointers...... opinions or suggestions would be great....

Cheers
the mad scientist..... Pete

[oti]

You didnt mention an intercooler, just making sure you've got it on the list of things to do

Also have you thought about using the F8 as a starting point instead?

[turbo-hatch]

i had an 800 in it before, and no 2 let go on me... so i have got the 550 in there( the only thing i cfould get my hands on at the time)... its only done 22,000kms.... so it was the perfect canidate for a turbo...... as for the intercooler dont know what i ma going to do about that yet, but working on getting the turbo right first........

[Brayden]

4-5 pound won't require an intercooler, but the N/A carby won't accept positive pressure. As soon as the turbo spools fuel the needle and seat will shut and dry up the float.

[turbo-hatch]

any one got any suggestions for the carby then?

[turbo-hatch]

what was to happen if i fitted a decent pressure electric fuel pump with return line to tank, making sure that the pump pressure is greater than the boost pressure that i am trying to put into the motor... wouldnt that compensate for the fuel needle trying to shut off?

[Brayden]

That might work, but you'd need a fuel pressure regulator as well to avoid the engine flooding at low RPM.

[turbo-hatch]

hey guys thjanks for the ideas, have had a change in direction and have started to build a suck thru manifold set up that bolts to the original intake manifold as an adaptor......... one i work out how to post pics i will put so photo's up for ya to have allok at an comment on...... all comments still apreciated and question being asked is can i fit inetrcooler and bov toa suck thru set up or not?

[Brayden]

An intercooler on a pull-through setup would become a bomb! Imagine a radiator filled with petrol.
One backfire and the front of the car would be history!

You could fit a BOV, but it would have to be plumb-back, otherwise you'd be venting petrol spray into the engine bay.

If you need someone to host pics for you then try imagebucket, or email them to admin@tamon.org and I'll put them up when I get a chance.

[turbo-hatch]

just an update, tried the conversion, got every thing fitted and blew the seals on the turbo, so i will be rebuilding the turbs and doing a couple of mods on the intake side but it did work, will get picks up as soon as possible

[Brayden]

Look forward to seeing this.

[eDave]

Tidy! Good luck with it mate!