Gert’s Engine Rebuild & Upgrade (Chasing 300Hp, yes another one sorry)

[Gertvr]

Originally Posted by vmax

Can you post the final spec/build sheet for your engine?
What fuel will you use?
Excellent results. I am sure you are thrilled.
I'll bet you can't wait to get it in the car.

Here Goes:

Short Block:

Sonic cleaned, and cleaned the case halves what feels like 100 times

1. Cross drilled Crankshaft
2. Porsche Main bearing set (.003" Clearance)
3. Pauter 4340 Rods
4. Porsche 996 GT3 R Rod bearings (.0028" Clearance)
5. JB Racing Straight Cut Steel lay shaft gear set.
6. Upgrade to clock wise rotation on the distributor drive gear
7. Sleeve main bearing webs and enlarge #4 oil supply port
8. Modify case to accept GT3 Oil pump
9. DYI boat tailing
10. Replace Oil squirters with removable ones
11. All new timing chains and sprockets (Porsche)
12. SuperTec Head stud kit
13. GT3 Oil pump
14. New Oil pressure relief springs and pistons
15. Modify oil pressure switch adapter to accept -4AN oil feed line to mechanical pressure gauge
16. Under-drive crank shaft pulley from SuperTec

Cylinders & Pistons:
1. Cylinders bored and replated by US Chrome back to stock (95mm)
2. JE 11.7:1 Pistons made according to JB Racing Spec
3. Goetze Piston Rings

Heads, Cam & Cam Towers
1. Upgrade to threaded spary-bar plugs
2. Elgin 316/294-106 Cam
3. Adjustable timing gears
4. Solid cam chain tensioners
5. Upgraded to later style idler arms with extended copper busing
6. Oversize valves 52mm Inlet 42.5mm Exh on 8mm valve stems.
7. Gasflowed by Xtreme Cyl heads with special exhaust ports
8. Twin Plug
9. Elgin Racing valve springs with Ti retainers
10. Head dome volume 86cc

Carburetors and Ignition
1. JB Racing CW twin plug distributor
2. 2 MSD blaster anti-vibration coils
3. 2 MSD CDI Ignition boxes with soft rev limiters
4. PMO 50 mm Carbs with 45mm venturies
5. 2 K&N Water shield air filters
6. Timing set to 30 deg @5K Rpm

Exhaust and mufflers
1. Bursch style header 26.5” x 1.75” OD primaries
2. 1.75” to 2” Burns SS merge collectors
3. 2.5” Flowmaster Deltaflow ser10 mufflers
4. 2” – 3” Reverse cone megaphones

I think that is about it.

The motor is in and the car is alive after almost 2 years. It started right up and is running well, both ignition boxes are firing and oil pressure is good. The car pulls really hard from 3.5K Rpm up and gives a really good kick after 6Krpm, and 8K comes up really quick after that.

All in all i am very happy with the motor and it was worth the wait. I have my first DE with the BMW club next weekend at Road Atlanta and will let you know how that went.

Cheers

Gert

[tadd]

Gert:
Solid mechanical tensioners have a really bad rap around here... But I just bought a vintage pair myself. What made you decide to use solids?

t

[cyber2213]

Hello ...
Some of you know the precise dimensions of the muffler "Megaphone" Porsche 911 RSR 3.0?
or:reverse cone Megaphone

also have the CAD drawings?


I'd like to achieve them with precise measures and detailed diagrams ...
Thanks to all ...