Love the simplicity of that, thanks as ever Mike.
Had a good chat with someone today who has built a lot of these engines with high lift cams and custom compression pistons and it has confirmed those clearances (minimum) so all I need are the pistons and rods.
Another long wait.
Keen to crack-on with this. Got to be back in the car by end Jan or early Feb.
Getting ahead of myself, but: Cam timing?
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- Nurse, I think I need some assistance
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Re: Getting ahead of myself, but: Cam timing?
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Re: Getting ahead of myself, but: Cam timing?
I was going to suggest 1.75mm clearance as that's what I used to look
for when building RSR engines.
Andy
for when building RSR engines.
Andy
Now Porsche less and sad.
3.2 Carrera Speedster (Sold and sorely missed)
3.2 Manual Cayenne (Sold)
73 2.4S (Gone to Singapore)
75 3.0l 914 (Sold)
3.2 Carrera Speedster (Sold and sorely missed)
3.2 Manual Cayenne (Sold)
73 2.4S (Gone to Singapore)
75 3.0l 914 (Sold)
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- Nurse, I think I need some assistance
- Posts: 18931
- Joined: Mon Mar 10, 2008 6:26 pm
- Location: West Midlands
Re: Getting ahead of myself, but: Cam timing?
There seems no hard and fast rule Andy, 1.75mm = 70 thou so for the inlet.
some argue the exhaust gets hotter/expends in length more, so needs a bit more, 2mm say, 80 thou.
If I can find 80 I will be pleased.
If it is more I won't worry!
Dread the thought of less!!
some argue the exhaust gets hotter/expends in length more, so needs a bit more, 2mm say, 80 thou.
If I can find 80 I will be pleased.
If it is more I won't worry!
Dread the thought of less!!
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9