[6D6GOAT]

So..I have always wanted to run a turbo. I pulled the supercharger and dove in. this is just an fyi post for anyone that is interested.

i wanted to keep it simple and inexpensive. my plan is to use stock pontiac logs turned backwards (thank you Tom S for the manifolds off of his 69 GTO)

to my surprise the stock manifolds almost fit backwards. there was some interference with the cross member. so i decided to notch the cross member so the stock manifolds will clear. currently there is a hole in the cross member. when i pull the motor i will weld in some metal.

the drivers side easily cleared the steering box which is what i thought for sure it would hit.

once i got the manifolds in i fabbed up a bracket to support the 45lb S400 turbo. i originally wanted to make a bracket off of the passenger side head but the size and position of the turbo would make that really difficult so i decided to mount the turbo to the frame.

here is a pic...




next it was time to make the bracket and flange that the turbo would mount to and the hot side exhaust from the manifolds...




next the hot side from the manifolds to the turbo flange....that took a couple of days. alot of clearance issues with the steering linkage made for some less than ideal bends. i think when i re do it i will have both of the dump into one 3 or 3.5 inch pipe the into the turbo. another problem i had was after i welded it all up the dimensions distorted a bit because of the heat. they went in there but not nearly as easy as when i was mocking it up with tack welds..

here is a pic.. the 4 bolt flange is for the wastegate.



next is the down pipe. the S400 has a 5 inch down pipe. unfortunately there is not enough room for a 5 inch down pipe once you get around the oil filter so i ran 5 inch as far as i could then petered it down to a 4 inch with a V band clamp (God i love those things)

here is a pic of the down pipe...all pretty...nice coat of hi temp exhaust paint....and then i realized that i still have to weld in the waste gate pipe .... dough!



the cold side was pretty easy. i used the old blow off valve (which i think may be a little on the small side). then i ran the oil line..the -12 return line.



i still have to finish the exhaust. i fired it up and let it idle for a while. i still have some bugs to work out. i need to reroute some stuff (brake line on the passenger side and the fuel line) i need to get some 90 degree angle boot spark plugs to keep the wires off of the down pipe. but the ground work is laid. tomorrow i hope to finish up the exhaust and take her for a spin