5.2 magnum GT35 to S475
About October of last year I saw the eBay s475s were getting really cheap ($208) and decided I’d get one and slowly collect parts to put on a “good” motor one day. A couple weeks ago I found a thread on theturboforums where a guy had put a t6 S475 on a smog 305 (170hp engine) and said it actually made 5psi by 3500 on the foot brake. This got my gears turning on if I could make things work for my engine. Fast forward to this past weekend and I was “looking” for stuff to do and decided I’d pull the radiator and see exactly how or if I could get this thing to fit. I’ve got Some pics of the gt35 beside the new turbo just to give a rough idea of how massive this thing is. (it’s basically a gallon of milk for size reference). Things snowballed and before I knew it I had pulled the old turbo kit off, cut hot side pipes and began fabbing the new hot side for this turbo to go on. I am going to cut my 26” radiator Down to 16” to help clear the shear size of the new turbo. I don’t *think* I’ll have any issue with cooling as 16” mustang radiators are very popular with the turbo LS crowd and some even get by with Honda radiators if they have a good fan. Plus being on e85 will help with cooling as well. Hot side will now be 2” fully divided. Down pipe will either be 5”reduced to 4” at the firewall and out the back or 5” to dual 4” in front of each fender (think bullhorns,but again no cutting) I will initially run non intercooled again but will eventually pull the grille support out to fit an air to air intercooler. I’m not worried about how it acts on the street as far as “fun factor” and spooling goes. At this point I strictly want to run a number at the track and run sick week etc. and see just how far a stock bottom end motor can go. The SBE record currently is 10.25 and I think I could get there with a cam swap and 20lbs based off of the current record engine combo. I’ll slowly be updating here mainly on weekends due to not getting a lot of time to work on things during the week.
About October of last year I saw the eBay s475s were getting really cheap ($208) and decided I’d get one and slowly collect parts to put on a “good” motor one day. A couple weeks ago I found a thread on theturboforums where a guy had put a t6 S475 on a smog 305 (170hp engine) and said it actually made 5psi by 3500 on the foot brake. This got my gears turning on if I could make things work for my engine. Fast forward to this past weekend and I was “looking” for stuff to do and decided I’d pull the radiator and see exactly how or if I could get this thing to fit. I’ve got Some pics of the gt35 beside the new turbo just to give a rough idea of how massive this thing is. (it’s basically a gallon of milk for size reference). Things snowballed and before I knew it I had pulled the old turbo kit off, cut hot side pipes and began fabbing the new hot side for this turbo to go on. I am going to cut my 26” radiator Down to 16” to help clear the shear size of the new turbo. I don’t *think* I’ll have any issue with cooling as 16” mustang radiators are very popular with the turbo LS crowd and some even get by with Honda radiators if they have a good fan. Plus being on e85 will help with cooling as well. Hot side will now be 2” fully divided. Down pipe will either be 5”reduced to 4” at the firewall and out the back or 5” to dual 4” in front of each fender (think bullhorns,but again no cutting) I will initially run non intercooled again but will eventually pull the grille support out to fit an air to air intercooler. I’m not worried about how it acts on the street as far as “fun factor” and spooling goes. At this point I strictly want to run a number at the track and run sick week etc. and see just how far a stock bottom end motor can go. The SBE record currently is 10.25 and I think I could get there with a cam swap and 20lbs based off of the current record engine combo. I’ll slowly be updating here mainly on weekends due to not getting a lot of time to work on things during the week.