Darton MID Install Los Angeles Area
05-21-2018, 11:13 PM
#17
Racer
Thread Starter
Mostly what im finding is the old general bashing of MIDs due to incorrect piston to wall clearance. I’m having custom racetech pistons made to my bore and they seem pretty sharp, so I think I can get that part right. And if Darton themselves, who worked with Chris White to develop the concept can’t do it...
05-21-2018, 11:14 PM
#18
Racer
Thread Starter
05-22-2018, 01:14 AM
#19
Rennlist Member
curious why you wouldn't just go the tried and true Alusil method? It's a lot of money to throw down on a MID setup not to mention the risk of failure. Mike is very experienced with Alusil. I heard he did a MID 944 block for the mechanic at Greg Brown's shop Precision Motorwerks.
https://rennlist.com/forums/944-turb...d-sleeves.html
https://rennlist.com/forums/944-turb...d-sleeves.html
05-22-2018, 04:15 AM
#20
Addict
Rennlist Member
Rennlist
Site Sponsor
Rennlist Member
Rennlist
Site Sponsor
You can dry sleeve the 2.5l block and bore it to 106mm. This was done years ago with good reliability. One Rennlister has about 100k miles on his now street/track. The company that did the sleeves is around LA or San Diego. As I recall it was not that expensive, back then in the $1200-1300 range. I cannot find their contacts I go, as I recall it was "Precision" "forgotten second part of name".
You can also contact LA sleeves and see who they recommend. Darton may also have a list of locals they recommend.
You can also contact LA sleeves and see who they recommend. Darton may also have a list of locals they recommend.
05-22-2018, 10:38 AM
#21
You can dry sleeve the 2.5l block and bore it to 106mm. This was done years ago with good reliability. One Rennlister has about 100k miles on his now street/track. The company that did the sleeves is around LA or San Diego. As I recall it was not that expensive, back then in the $1200-1300 range. I cannot find their contacts I go, as I recall it was "Precision" "forgotten second part of name".
You can also contact LA sleeves and see who they recommend. Darton may also have a list of locals they recommend.
You can also contact LA sleeves and see who they recommend. Darton may also have a list of locals they recommend.
https://rennlist.com/forums/944-turb...s-old-car.html
05-22-2018, 11:15 AM
#22
Rainman
Rennlist Member
Rennlist Member
side note on alusil, OP is doing a 944/Mitsu hybrid stroker so no off the shelf 944 alusil (wossner) pistons work.
and having wossner make custom ones is a thousand-buck proposition...yikes.
and having wossner make custom ones is a thousand-buck proposition...yikes.
05-22-2018, 11:53 AM
#24
Racer
Thread Starter
Going more modern with compression as well, 9.5:1, with welded quench pads as well as porting and shaping of head and chamber. Hopefully the pistons can be made to match the oversized valves to get the right compression while maintaining non interference. This is a fun project, hope I don’t muck it up.
05-22-2018, 01:15 PM
#25
Rainman
Rennlist Member
Rennlist Member
Going more modern with compression as well, 9.5:1, with welded quench pads as well as porting and shaping of head and chamber. Hopefully the pistons can be made to match the oversized valves to get the right compression while maintaining non interference. This is a fun project, hope I don’t muck it up.
i think you could get good results shaping the 944 combustion chamber like the 1996-up GM L31 vortec heads, "heart shaped fast burn" style.
search this forum for l31 vortec, i made a comparison thread years ago.