View Single Post
billjam billjam is online now
Certified User
 
billjam's Avatar
 
Join Date: Aug 2007
Location: Perth, Western Australia
Posts: 2,044
Garage
Update

Camshafts
Have decided to go with John's DC21 grind. Should give extra power to 6500-ish.
Decided not to go for a higher power band as costs just become exponential to build in reliability over 7K. That's not what this engine is about.

Heads
They are in the shop for new guides at present.
Decided to stick with standard valves. RS valves are each 5% larger than std 964 valves but I think the $550 + shipping + seat machining costs could be better applied to headers where gain might be a bit more than 5%, especially with higher lift camshaft (+4% inlet lift and +9% exhaust lift). If my valves needed replacing, RS valves would be first on the shopping list - unfortunately they are good! My logic may be flawed, but it makes sense to me!
One problem I see with the exhaust ports is that there is very little room for enlargement due to the gasket ring groove. Is this groove normally welded up when bigger headers are fitted?

Head Studs
A question I asked earlier - Are the head stud problems of earlier years resolved in this 1992 engine, or should I be adding Racewear studs to my shopping cart?
Any comments?

Coil Pack Ingition
No decision here yet. Still open to practical suggestions. Currently being discussed separately at thread Audi/VW coil packs question
I still like the idea of separate coil packs (coil on plug) but open to other ideas.

Oil Cooler
A standard 911 cooler and thermostat is on its way from another Pelican.
I'll need to modify the 964 engine shroud in the region of the cooler, so I'll post some results of that modification later.

ITBs and Inlet Manifold
Still waiting for ITBs to turn up, but work has started on their manifolds.
ITBs are 44mm and manifold and ports will be same size right into head.

Clutch and Flywheel
Still looking for best way to go here.
Considering that engine will most likely be attached to a 915 box, I presume that a complete higher spec 3.2/915 clutch setup would be the easiest fit. Yes?

Engine Management
Megasquirt II seems like the only way to go!

The weekend approaches ... more parts cleaning ,
__________________
Bill
1988 Carrera - 3.6 engine with ITBs, COPs, MS3X
2024 Macan S
Day job ... www.jesfab.com.au
Memories: '68 912, '72 911T, '80 911SC, '84 911, '85 930, '86 930, '87 911, '21 Macan S
Old 12-04-2009, 12:18 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #17 (permalink)