Super Long rod destroked 2.5.....
#1
Scooby Regular
Thread Starter
Join Date: May 2015
Location: Derbyshire
Posts: 219
Likes: 0
Received 0 Likes
on
0 Posts
Super Long rod destroked 2.5.....
So, after opinions...
plan is closed deck 2.5 block
+4mm longer rod
Manley 14cc bowl pistons
Tuffrided 75mm crank
destroked to 2.3
9.1:1 compression ratio
1.8 rod ratio
been done? any good?
plan is closed deck 2.5 block
+4mm longer rod
Manley 14cc bowl pistons
Tuffrided 75mm crank
destroked to 2.3
9.1:1 compression ratio
1.8 rod ratio
been done? any good?
#3
Scooby Regular
Thread Starter
Join Date: May 2015
Location: Derbyshire
Posts: 219
Likes: 0
Received 0 Likes
on
0 Posts
that's the other option, a +2mm rod with mahle pistons, and a 8.3:1 comp ratio, with 1.7 rod ratio.
Im not after monty power, just reliable and nice as fast road/odd track day etc.
Blaming mikee for his mad ideas lol
Im not after monty power, just reliable and nice as fast road/odd track day etc.
Blaming mikee for his mad ideas lol
#5
Scooby Regular
Thread Starter
Join Date: May 2015
Location: Derbyshire
Posts: 219
Likes: 0
Received 0 Likes
on
0 Posts
see im not even aiming for the magic 500, id be happy with the sc42 ive got on at the minute, maybe flex fuel it and do a 20% meth for the odd track day but nothing major, just reliable and still fun, but different to what everyone else runs.
#8
Scooby Regular
Thread Starter
Join Date: May 2015
Location: Derbyshire
Posts: 219
Likes: 0
Received 0 Likes
on
0 Posts
#9
Scooby Regular
#10
Scooby Regular
Thread Starter
Join Date: May 2015
Location: Derbyshire
Posts: 219
Likes: 0
Received 0 Likes
on
0 Posts
#12
Scooby Regular
Thread Starter
Join Date: May 2015
Location: Derbyshire
Posts: 219
Likes: 0
Received 0 Likes
on
0 Posts
it widens the power and torque band, allows better rpm, and better mpg apparently lol
the main reason I wonna try it is that with a longer rod, on a 75mm crank, the rod ratio will be better, and in turn will put less side loading on the cylinder walls.
Its something different, as banny said, hes done the +2mm version and loved it.
the main reason I wonna try it is that with a longer rod, on a 75mm crank, the rod ratio will be better, and in turn will put less side loading on the cylinder walls.
Its something different, as banny said, hes done the +2mm version and loved it.
#16
Scooby Regular
Thread Starter
Join Date: May 2015
Location: Derbyshire
Posts: 219
Likes: 0
Received 0 Likes
on
0 Posts
#17
Scooby Regular
iTrader: (6)
You're not changing the throw of the actual crank by doing this so the major clearance issues with crank blades won't be an issue. The rod will be getting closer to the bottom of the bore sleeve in theory, so there may be some checking needed in this area. Suspect even then it should be ok.
Interesting concept. I'll certainly watch the progress when you get started!
Interesting concept. I'll certainly watch the progress when you get started!
#19
Scooby Regular
Thread Starter
Join Date: May 2015
Location: Derbyshire
Posts: 219
Likes: 0
Received 0 Likes
on
0 Posts
You're not changing the throw of the actual crank by doing this so the major clearance issues with crank blades won't be an issue. The rod will be getting closer to the bottom of the bore sleeve in theory, so there may be some checking needed in this area. Suspect even then it should be ok.
Interesting concept. I'll certainly watch the progress when you get started!
Interesting concept. I'll certainly watch the progress when you get started!
#21
Scooby Regular
On mine I used a ej20 cdb I no this is regarding the ej25 block. But I used ej20 cdb ej20 crank corrillo 2m longer rods from America. Mahle short skirted 100mm pistons.
Turbo is a billet sc46 the car is so aggressive it made 473bhp and 520ftlb @ 1.6bar with more in reserve as another factor was restricting us on the day
Turbo is a billet sc46 the car is so aggressive it made 473bhp and 520ftlb @ 1.6bar with more in reserve as another factor was restricting us on the day
#22
Scooby Regular
Thread Starter
Join Date: May 2015
Location: Derbyshire
Posts: 219
Likes: 0
Received 0 Likes
on
0 Posts
On mine I used a ej20 cdb I no this is regarding the ej25 block. But I used ej20 cdb ej20 crank corrillo 2m longer rods from America. Mahle short skirted 100mm pistons.
Turbo is a billet sc46 the car is so aggressive it made 473bhp and 520ftlb @ 1.6bar with more in reserve as another factor was restricting us on the day
Turbo is a billet sc46 the car is so aggressive it made 473bhp and 520ftlb @ 1.6bar with more in reserve as another factor was restricting us on the day
Im hoping with the 42 on there it will work a treat, when it ran a strait 2.5 it was a lively little ****** at 430, but obviously majority of the power was low end, in destroking it will allow a wider power band, or atleast that's my hope... either way, worth a try
#23
Scooby Regular
sounds like fun!
Im hoping with the 42 on there it will work a treat, when it ran a strait 2.5 it was a lively little ****** at 430, but obviously majority of the power was low end, in destroking it will allow a wider power band, or atleast that's my hope... either way, worth a try
Im hoping with the 42 on there it will work a treat, when it ran a strait 2.5 it was a lively little ****** at 430, but obviously majority of the power was low end, in destroking it will allow a wider power band, or atleast that's my hope... either way, worth a try