New Sleeves (MID) are finaly here
01-21-2005, 05:58 PM
#20
Race Car
Originally Posted by NZ951
How much does a block and pistons weigh? You planning on doing an exchange service? I really need a 2.7 16V... but will start with the 2.7
01-21-2005, 06:03 PM
#22
Race Director
No class, his 2.6 is an S2 engine I think. I am trying to work with the stock engine in the car. 2.7 instead of 2.8 because I dont think a 2.8 bore can handle higher boost.
01-21-2005, 06:06 PM
#23
Race Car
Originally Posted by NZ951
No class, his 2.6 is an S2 engine I think. I am trying to work with the stock engine in the car. 2.7 instead of 2.8 because I dont think a 2.8 bore can handle higher boost.
01-21-2005, 06:07 PM
#24
Three Wheelin'
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As Chris said, the recommended Bore for these sleeves in a 2.5 block is 104mm. That makes for a 2.7 liter.
Eivind,
It does increase displacement, but it doesn't have to if you go back with a stock piston size (why would you?
). Some other benefits of going with a steel sleeve are a stronger cylinder, and the interlocking design of these sleeves also increase cylinder rigidity, which helps keep the headgasket sealed (among other things) under high power.
As Chris said, the recommended Bore for these sleeves in a 2.5 block is 104mm. That makes for a 2.7 liter.
Eivind,
It does increase displacement, but it doesn't have to if you go back with a stock piston size (why would you?
). Some other benefits of going with a steel sleeve are a stronger cylinder, and the interlocking design of these sleeves also increase cylinder rigidity, which helps keep the headgasket sealed (among other things) under high power.
01-21-2005, 06:36 PM
#27
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“No class, his 2.6 is an S2 engine I think”
whadda you mean - no class?….i gots plenty of class!
Actually the 2.6 liter size is the size limit for GT3 class for PCA club racing. That’s why the one motor is going to be 2.599999 liters.
Other questions –
what are sleeves for?
The stock Alusil cylinders are a wonderful thing until they get worn or damaged or you want increased displacement. Replacement pistons that work with the Alusil are quite costly as is the over boring procedure. By replacing the alusil cylinders with iron sleeves you can run after market pistons at many different sizes. The sleeves are also a lot stronger than stock and will survive harsh conditions better.
For the hardcore racer types – the MID sleeves can be replaced fairly easily with no additional machining. You could do it at the track if you were that committed! A damaged alusil block is pretty much trash.
The new MID design should make for a much more stable decking and end the head gasket issues.
Sizes – once you decide to go with a sleeved motor you can choose what ever size you like – all the same costs.
104mm is the max with the 2.5 block (2.7 with stock crank)
and 106 is the max with 3.0 (3.1 with the 3.0 crank)
The 2.5 sleeves will not go larger than 104 so 2.7 is the limit.
I can source a block for anybody that wants to go with out a core. One of the nice things about the sleeving process is that the condition of the stock bores just doesn’t matter. Worn out blocks are perfect for this application.
Oh yeah – the 16v pistons are different (quite a bit) so make up your mind soon!!! The 16v pistons are the same price as the 8v (are you starting to see a pattern here?)
Chris White
whadda you mean - no class?….i gots plenty of class!
Actually the 2.6 liter size is the size limit for GT3 class for PCA club racing. That’s why the one motor is going to be 2.599999 liters.
Other questions –
what are sleeves for?
The stock Alusil cylinders are a wonderful thing until they get worn or damaged or you want increased displacement. Replacement pistons that work with the Alusil are quite costly as is the over boring procedure. By replacing the alusil cylinders with iron sleeves you can run after market pistons at many different sizes. The sleeves are also a lot stronger than stock and will survive harsh conditions better.
For the hardcore racer types – the MID sleeves can be replaced fairly easily with no additional machining. You could do it at the track if you were that committed! A damaged alusil block is pretty much trash.
The new MID design should make for a much more stable decking and end the head gasket issues.
Sizes – once you decide to go with a sleeved motor you can choose what ever size you like – all the same costs.
104mm is the max with the 2.5 block (2.7 with stock crank)
and 106 is the max with 3.0 (3.1 with the 3.0 crank)
The 2.5 sleeves will not go larger than 104 so 2.7 is the limit.
I can source a block for anybody that wants to go with out a core. One of the nice things about the sleeving process is that the condition of the stock bores just doesn’t matter. Worn out blocks are perfect for this application.
Oh yeah – the 16v pistons are different (quite a bit) so make up your mind soon!!! The 16v pistons are the same price as the 8v (are you starting to see a pattern here?)
Chris White
01-21-2005, 07:00 PM
#28
Race Car
Do these replace the entire cylinder, or just fit inside of the existing ones?
With a 3.0L crank, wouldn't that make the 2.5L block, wiht 104mm pistons somewhere around 3.0L?
With a 3.0L crank, wouldn't that make the 2.5L block, wiht 104mm pistons somewhere around 3.0L?
01-21-2005, 07:01 PM
#29
Race Director
LOL I meant I am not running in a class... it was answering the first question! I plan on running 20psi. Ok so I need to do everything at once? Damn it... I need to do more research.