White911TTOne

I'm at the final stages of completing the conversion from NA to Twin Turbo 3.8 engine. I figured I would share some pics.

OverBoosted28

Single plug 3.8 ??? More info. cams, pumps!!!! :-)

White911TTOne

Twin plug 3.8

Aaron 993C2

Sweeeeeet. Love the shot with the cam chain and exposed turbo

sand_man

Well this is certainly exciting (to say the least)!!! I noticed a welding bead on the heads in some of the pics, what's that all about? Looks to run along, vertically, where the head meets the cylinder. Is this strengthening something?

Bill Verburg

Nice!!
I don't see how you sealed the cylinder bases, The stock thin n/a o-ring will cause problems down the road.

sand_man

And those headers...DROOL!

Basal Skull

Those are slip in cylinders ? Bill what extra sealing for the bases to builders do?

Basal Skull

And are those welded na heads or twin plugged turbo, and p&c 3.8 turbo or 3.8 na or some combo/custom -what compression do you figure?

pilotjosh

What a project! Please share the details!

Mayo71

Interésting proyecto

White911TTOne

Build Sheet 3.8l with 8.3:1 compression
1. Carrillo rods with ARP bolts
2. ARP head studs
3. 3.8 slip cylinders with 964 turbo pistons NA O-rings used to seal the cylinders .
4. Welded heads twin plugs
5. 930 scavenge turbo oil pump driven of driver camshaft
6. GT2 Evo Cams from WebCams
7. Mechanical lifters
8. 993 turbo oil feed lines
9. k24 turbos
10. Motec m48 used with OEM harness
11. Plx wideband O2 sensor
12. plx boost/vacuum sensor
13. Protomotive intercooler with intake hoses
14. 72lb injectors
15. 3.5Bar fuel check valve
16. FR5DTC plugs
17. 5 bar fuel pump

sand_man

Curious why the exhaust port header flanges are 4-hole on the passenger side and 2-hole on the driver.

trophy

Makes them interchangeable with a 964 style head, manufacturer doesn't have to make a specific 993 and 964 header for the LH head.

trophy

Nice build list.....

Can I make one suggestion on the fuel injectors. I am running Injector Dynamics ID1000 in my 4.0l Build. When they were suggested to me I thought they were over kill from the 40lb injectors I had. The low pulse control these ID1000 injectors have is incredible, and there is never an issue of fuel delivery at the top end. My car idles with the injectors at around 5 to 10% duty cycle perfectly.

I classify them as cheap insurance when it comes to a build like this.