Factory Turbo rebuilding?…..

I have 3 factory turbo Daytonas myself. I used to rebuild these turbos on a regular basis. I got the kits from G-Pop Shop. If you decide to rebuild it yourself, be sure to mark the clocking on the impeller before removing it. That will preserve whatever balance was there from the factory. G-Pop Shop also has a rebuilding service.

Converting from the draw-thru T1 turbo to the blow-thru 88+ (or earlier T2) style requires a different intake scroll. The early T1 had a 90 degree adapter that also received the EGR valve. You could swap the T2 scroll and be done, or you could use an adaptor that I can't seem to find on either Turbos Unleashed or FWD Performance sites. I have one on our '85 Daytona Turbo converted to T2. You may also be tempted to simply swap for the later T2 Garret. One option is the abundant Mitsubishi turbo. It had a smaller A/R which allowed it to spool much quicker, but would choke at higher boost levels. The Garret may have had a bit of turbo lag, but was capable of delivering close to 300 HP in relatively stock form.

One unique feature on your early draw-thru turbo is the double oil seal. Since it was a draw-thru, the intake tract was placed under vacuum. Normal turbos would leak oil into the induction system. Garret added extra oil seals to combat that. Your center chunk is more durable than the later Mitsubishis or even T2 Garrets. I'd keep that if at all possible.

If you need parts, I have plenty that I'd love to put to a good cause. (PM me.)