Rennlist - Porsche Discussion Forums

Notices
944 Turbo and Turbo-S Forum 1982-1991
Sponsored by:
Sponsored by: Clore Automotive

Refresh951's Hybrid Ultra Stroker Build

Thread Tools
 
Search this Thread
 
Old 01-29-2013, 11:17 PM
  #151  
V2Rocket
Rainman
Rennlist Member
 
V2Rocket's Avatar
 
Join Date: Jan 2007
Location: Nashville, TN
Posts: 45,548
Received 648 Likes on 502 Posts
Default
Originally Posted by refresh951
0.010"
block decked at all? i see studs...

Originally Posted by blown 944
Looks like its coming together well. It will be close if the belt breaks, but let's hope it never gets tested. Looks like my next cam won't be non interference on the bigger engine .

I'm getting excited just watching your progress.

I did find some longer rods for your next build ... Lol

I'm thinking a 3.6 liter monster hybrid
raising the deck height? pushing the limits for bores? you can get the liners pretty close on a siamesed engine...like this northstar
V2Rocket is offline  
Reply Like
Old 01-29-2013, 11:36 PM
  #152  
blown 944
Race Car
 
blown 944's Avatar
 
Join Date: Jul 2007
Location: Firestone, Colorado
Posts: 4,826
Likes: 0
Received 4 Likes on 4 Posts
Default
108 mm bore (been done) and 97mm stroke (welded). I'm not positive on the stroke but I think it can be done.
blown 944 is offline  
Reply Like
Old 01-29-2013, 11:42 PM
  #153  
1987Porsche944WithRealLongName
Racer
 
1987Porsche944WithRealLongName's Avatar
 
Join Date: Feb 2009
Posts: 304
Likes: 0
Received 0 Likes on 0 Posts
Default
I would love to see a 3.6 liter 4 cylinder 944, thats just wild. Almost sounds -to- big
1987Porsche944WithRealLongName is offline  
Reply Like
Old 01-29-2013, 11:43 PM
  #154  
refresh951
Rennlist Member
Thread Starter
 
refresh951's Avatar
 
Join Date: Jun 2010
Location: Marietta, Georgia
Posts: 3,365
Likes: 0
Received 22 Likes on 9 Posts
Default
Originally Posted by blown 944
108 mm bore (been done) and 97mm stroke (welded). I'm not positive on the stroke but I think it can be done.
Do not tempt me, LOL. Even 106 mm bore with my crank and a 16V head would be amazing. Pan is already installed . I sent you an email with some data.
refresh951 is offline  
Reply Like
Old 01-29-2013, 11:45 PM
  #155  
refresh951
Rennlist Member
Thread Starter
 
refresh951's Avatar
 
Join Date: Jun 2010
Location: Marietta, Georgia
Posts: 3,365
Likes: 0
Received 22 Likes on 9 Posts
Default
Originally Posted by V2Rocket_aka944
block decked at all?]
Block decked to 9.030"
refresh951 is offline  
Reply Like
Old 01-30-2013, 12:27 AM
  #156  
86 951 Driver
Race Car
 
86 951 Driver's Avatar
 
Join Date: Oct 2002
Location: KC, MO
Posts: 3,638
Likes: 0
Received 1 Like on 1 Post
Default
Originally Posted by blown 944
Looks like its coming together well. It will be close if the belt breaks, but let's hope it never gets tested. Looks like my next cam won't be non interference on the bigger engine .

I'm getting excited just watching your progress.

I did find some longer rods for your next build ... Lol

I'm thinking a 3.6 liter monster hybrid
Why would the cam cause it to be non interference? I would think that would be determined on how the pistons are shaped vs. A cam choice.
86 951 Driver is offline  
Reply Like
Old 01-30-2013, 12:30 AM
  #157  
Rogue_Ant
Addict
Rennlist Member
Rennlist
Small Business Partner
 
Rogue_Ant's Avatar
 
Join Date: May 2006
Location: Denver
Posts: 5,252
Likes: 0
Received 4 Likes on 4 Posts
Default
Originally Posted by 86 951 Driver
Why would the cam cause it to be non interference? I would think that would be determined on how the pistons are shaped vs. A cam choice.
More lift on the cam, means the valves protrude into the combustion-chamber farther, necessitating deeper reliefs into the pistons...
Rogue_Ant is offline  
Reply Like
Old 01-30-2013, 12:37 AM
  #158  
blown 944
Race Car
 
blown 944's Avatar
 
Join Date: Jul 2007
Location: Firestone, Colorado
Posts: 4,826
Likes: 0
Received 4 Likes on 4 Posts
Default
Originally Posted by Rogue_Ant
More lift on the cam, means the valves protrude into the combustion-chamber farther, necessitating deeper reliefs into the pistons...

Yep, my next trial will add .080 to whatever cam I choose. Either NA or turbo. I could fly cut the pistons I suppose, but using a drop in piston always sounds better IMO.
blown 944 is offline  
Reply Like
Old 01-30-2013, 01:14 AM
  #159  
m73m95
Nordschleife Master
 
m73m95's Avatar
 
Join Date: Dec 2007
Location: Las Vegas, NV
Posts: 7,100
Likes: 0
Received 7 Likes on 5 Posts
Default
How much stroke can you get before you pull the pistons out of the bottom of the cylinder?
m73m95 is offline  
Reply Like
Old 01-30-2013, 01:57 AM
  #160  
V2Rocket
Rainman
Rennlist Member
 
V2Rocket's Avatar
 
Join Date: Jan 2007
Location: Nashville, TN
Posts: 45,548
Received 648 Likes on 502 Posts
Default
Originally Posted by m73m95
How much stroke can you get before you pull the pistons out of the bottom of the cylinder?
how much of the crank girdle can be machined out?
V2Rocket is offline  
Reply Like
Old 01-30-2013, 10:24 AM
  #161  
blown 944
Race Car
 
blown 944's Avatar
 
Join Date: Jul 2007
Location: Firestone, Colorado
Posts: 4,826
Likes: 0
Received 4 Likes on 4 Posts
Default
Double
blown 944 is offline  
Reply Like
Old 01-30-2013, 10:24 AM
  #162  
blown 944
Race Car
 
blown 944's Avatar
 
Join Date: Jul 2007
Location: Firestone, Colorado
Posts: 4,826
Likes: 0
Received 4 Likes on 4 Posts
Default
Originally Posted by m73m95
How much stroke can you get before you pull the pistons out of the bottom of the cylinder?

My pistons already have part of the skirt lower than the cylinder. It would need to be quite a bit more stroke to be of concern. Plus the pistons we are using have a shorter skirt.


Originally Posted by V2Rocket_aka944
how much of the crank girdle can be machined out?

With the rods we are using its not necessary
blown 944 is offline  
Reply Like
Old 01-30-2013, 10:37 AM
  #163  
User 52121
Nordschleife Master
 
User 52121's Avatar
 
Join Date: Mar 2006
Posts: 8,695
Received 134 Likes on 91 Posts
Default
User 52121 is offline  
Reply Like
Old 01-30-2013, 11:38 AM
  #164  
V2Rocket
Rainman
Rennlist Member
 
V2Rocket's Avatar
 
Join Date: Jan 2007
Location: Nashville, TN
Posts: 45,548
Received 648 Likes on 502 Posts
Default
Originally Posted by robstah
Northstars are known to have headgasket issues.
That's due to the head bolts using too fine a thread which pulls out of the block. Putting coarser studs in fixes it. Boost isn't an issue then.

Originally Posted by blown 944

With the rods we are using its not necessary
he said .08 clearance; with added stroke the rods would go out a bit.
V2Rocket is offline  
Reply Like
Old 01-30-2013, 01:44 PM
  #165  
blown 944
Race Car
 
blown 944's Avatar
 
Join Date: Jul 2007
Location: Firestone, Colorado
Posts: 4,826
Likes: 0
Received 4 Likes on 4 Posts
Default
Sorry I meant the rods that I would be using. The have offset bolts. Even so, I believe that I could fit the current rods with minimal clearance work.

There are some other things about to happen that havnt been shared yet. Sometimes I get ahead of myself.
blown 944 is offline  
Reply Like



Advanced Search
Quick Reply: Refresh951's Hybrid Ultra Stroker Build


Reply Closed Thread Share
Forum Jump

All times are GMT -3. The time now is 06:06 PM.