3.2 911 engine: mods to give 7600 min red line?
Moderators: hot66, impmad2000, Barry, Viv_Surby, Derek, Mike Usiskin
-
- Nurse, I think I need some assistance
- Posts: 18926
- Joined: Mon Mar 10, 2008 6:26 pm
- Location: West Midlands
Re: 3.2 911 engine: mods to give 7600 min red line?
Yes, it is.
USA companies come across far more 'can-do' than the UK and try hard.
Still, just need to be sure what the Kent Spring Kit is, but a small detail.
Still trying to find out if Wossner pistons can take the valve lift of the GE60 cam, ie valve pocket dept.
The JE pistons do but their dome volume is much larger than the Wossner (JE = 41.7cc and Woss =36.5cc) but both have the same compression ratio.
Maybe I don't understand the meaning of the term Dome Volume correctly.
Any thoughts welcome.
USA companies come across far more 'can-do' than the UK and try hard.
Still, just need to be sure what the Kent Spring Kit is, but a small detail.
Still trying to find out if Wossner pistons can take the valve lift of the GE60 cam, ie valve pocket dept.
The JE pistons do but their dome volume is much larger than the Wossner (JE = 41.7cc and Woss =36.5cc) but both have the same compression ratio.
Maybe I don't understand the meaning of the term Dome Volume correctly.
Any thoughts welcome.
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
- PeterK
- DDK rules my life!
- Posts: 1069
- Joined: Mon Sep 01, 2014 3:04 pm
- Location: GU51 - Fleet, Hampshire, UK
Re: 3.2 911 engine: mods to give 7600 min red line?
If the have the same CR, my assumption would be that the Wossner pistons (with smaller dome volume) must have larger (and probably but not necessarily deeper) cut-outs
'79 Targa - restoration now mainly complete & being driven
viewtopic.php?f=28&t=59756
viewtopic.php?f=28&t=59756
-
- Nurse, I think I need some assistance
- Posts: 18926
- Joined: Mon Mar 10, 2008 6:26 pm
- Location: West Midlands
Re: 3.2 911 engine: mods to give 7600 min red line?
Could well be that Peter.
I emailed Wossner USA who have referred me to Wossner UK as I'm in the UK for answers about the cam lift.
Not sure wht USA could not simply answer my question.
Do you think the taller dome of the JE pistons demand twin spark on these larger dia pistons?
I emailed Wossner USA who have referred me to Wossner UK as I'm in the UK for answers about the cam lift.
Not sure wht USA could not simply answer my question.
Do you think the taller dome of the JE pistons demand twin spark on these larger dia pistons?
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
-
- Nurse, I think I need some assistance
- Posts: 18926
- Joined: Mon Mar 10, 2008 6:26 pm
- Location: West Midlands
Re: 3.2 911 engine: mods to give 7600 min red line?
Fellow hillclimber has pointed me to a UK supplier of JE pistons for £100 more than Wossner, so going there on Monday.
Pictures don't show rings, so checking the price includes the rings first.
Very nearly there.
Pictures don't show rings, so checking the price includes the rings first.
Very nearly there.
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
-
- Me and DDK sitting in a tree! KISSING
- Posts: 2629
- Joined: Fri Apr 18, 2008 5:58 pm
- Location: Sunny Somerset, just above the water....
Re: 3.2 911 engine: mods to give 7600 min red line?
Wonderful quote from another forum about a different engine project -
As with everything else, you can either think about it, debate it, sit in front of a screen, or just do it (hopefully before the Care Home bites). Just do it.
Spot on!
JW
As with everything else, you can either think about it, debate it, sit in front of a screen, or just do it (hopefully before the Care Home bites). Just do it.
Spot on!
JW
Life's a single timed run with no practice....
1970 914/6 2.4E/Webers
1970 VW Beetle project
1972 911 Hillclimber 3.2 MFI. Part of the family for 30+ years!
2006 Hymer Merc Starline 630
2000 T4 Van LPG
2000 Golf V5 Estate GT (Greyhound Transport!)
1970 914/6 2.4E/Webers
1970 VW Beetle project
1972 911 Hillclimber 3.2 MFI. Part of the family for 30+ years!
2006 Hymer Merc Starline 630
2000 T4 Van LPG
2000 Golf V5 Estate GT (Greyhound Transport!)
-
- Nurse, I think I need some assistance
- Posts: 18926
- Joined: Mon Mar 10, 2008 6:26 pm
- Location: West Midlands
Re: 3.2 911 engine: mods to give 7600 min red line?
Yep, and it's underway already.
Piston and rod orders now in the USA and I'm in a BIG queue...
Piston and rod orders now in the USA and I'm in a BIG queue...
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
-
- Nurse, I think I need some assistance
- Posts: 10276
- Joined: Wed Mar 31, 2004 1:27 pm
- Location: Cheshire
- Contact:
Re: 3.2 911 engine: mods to give 7600 min red line?
Sound good
You could use your 911 as a test bed for the new lump… get it run in and a basic seat of pants ignition map before rolling roads.
You could use your 911 as a test bed for the new lump… get it run in and a basic seat of pants ignition map before rolling roads.
-
- Nurse, I think I need some assistance
- Posts: 18926
- Joined: Mon Mar 10, 2008 6:26 pm
- Location: West Midlands
Re: 3.2 911 engine: mods to give 7600 min red line?
Run in?
Whatsthatthen?
I've re-ringed this engine twice and raced it straight away...
Cam break-in my need a touch more sympathy but I expect the rolling road man to do that for me.
Going to be a long wait for the parts, hope they will be with me before Xmas, but the supplier was not so sure.
Lots and lots of prep to do and cleaning etc plus the flat fan rubber cushion coupling is a bit rattly on tick over and that sort of thing.
Watched a video of heads being twin plugged, quite involved, = time = costs.
I will be amazed if I keep the bill to under £8K.
Project will kick off mid October.
Is there an appetite for a thread ?
Last hill climb this weekend, last time to feel 262 bhp and 450 bhp/ton.
Hope to see 525 bhp/ton in 2022.
https://youtu.be/c8pzuNoSi0w
https://youtu.be/nbh4EfuGuao
Whatsthatthen?
I've re-ringed this engine twice and raced it straight away...
Cam break-in my need a touch more sympathy but I expect the rolling road man to do that for me.
Going to be a long wait for the parts, hope they will be with me before Xmas, but the supplier was not so sure.
Lots and lots of prep to do and cleaning etc plus the flat fan rubber cushion coupling is a bit rattly on tick over and that sort of thing.
Watched a video of heads being twin plugged, quite involved, = time = costs.
I will be amazed if I keep the bill to under £8K.
Project will kick off mid October.
Is there an appetite for a thread ?
Last hill climb this weekend, last time to feel 262 bhp and 450 bhp/ton.
Hope to see 525 bhp/ton in 2022.
https://youtu.be/c8pzuNoSi0w
https://youtu.be/nbh4EfuGuao
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
-
- DDK 1st, 2nd and 3rd for me!
- Posts: 2044
- Joined: Wed Jun 23, 2004 9:47 pm
- Location: Nottinghamshire
Re: 3.2 911 engine: mods to give 7600 min red line?
I think there is one already911hillclimber wrote:
Project will kick off mid October.
Is there an appetite for a thread ?
Have fun this weekend, my last play next weekend at Anglesey
93 964 C2
99 Boxster 2.5 > 2.7 hill climber
71 914/6 3.0 - gone
'You see Paul, hill climbing is like making love to a beautiful woman. You get your motor running, check your fluids, hang on tight and WHOA..30 seconds later it's all over!' Swiss Tony
99 Boxster 2.5 > 2.7 hill climber
71 914/6 3.0 - gone
'You see Paul, hill climbing is like making love to a beautiful woman. You get your motor running, check your fluids, hang on tight and WHOA..30 seconds later it's all over!' Swiss Tony