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Old 05 August 2015 | 09:57 AM
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From: harlow
Default 2.1 stroker

Does the extra 4mm stroke really make that much difference?
Old 05 August 2015 | 10:34 AM
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Yes it's 4mm x 4 on say a 92mm bore.
Old 05 August 2015 | 10:38 AM
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1994cc vs 2124cc, no replacement for displacement
Old 05 August 2015 | 11:25 AM
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I'm a bit sceptical as it's 100cc, that's not a lot! Surely make a lot more sense to use the whole 2.5 engine block instead?
Old 05 August 2015 | 11:26 AM
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Originally Posted by Tidgy
1994cc vs 2124cc, no replacement for displacement
Correct, hence I would use the flat 6 if I were to ever build another drag car 👍
Old 05 August 2015 | 11:44 AM
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Generally increases spool by 500rpm earlier, along with a bit more torque (compared to a stock 2.0 with the same heads) from what I have seen
Old 05 August 2015 | 02:42 PM
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Makes a very noticeable difference, longer throw crank means faster piston speeds which equates to faster exhaust gases which spool the turbo a lot faster. Big chunk more torque too. Mine is on 92.5mm bores with a 79mm crank.

2.1's still love to rev too, unlike a 2.5 for instance.
Old 05 August 2015 | 02:56 PM
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Originally Posted by ScottyPPP
Makes a very noticeable difference, longer throw crank means faster piston speeds which equates to faster exhaust gases which spool the turbo a lot faster. Big chunk more torque too. Mine is on 92.5mm bores with a 79mm crank.

2.1's still love to rev too, unlike a 2.5 for instance.
DOn't have the low down grunt of a 2.5,,, lol

but yeah 2.1 and 2.5 rive very differen't, 2.5 low down lazy reving, 2.1 laggier revy engine
Old 05 August 2015 | 03:17 PM
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Originally Posted by Tidgy
DOn't have the low down grunt of a 2.5,,, lol
Buy a Diesel
The following users liked this post:
Old 05 August 2015 | 04:34 PM
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Originally Posted by ScottyPPP
Buy a Diesel
While your laggie 2.1 is waiting to build boost I'll be gone,,,, hahaha
Old 05 August 2015 | 04:50 PM
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Originally Posted by Tidgy
While your laggie 2.1 is waiting to build boost I'll be gone,,,, hahaha
Nah, it has gears, just make sure you're in the right one. If you're calling a 2.1 laggy what do you think of a 2.0?
Old 05 August 2015 | 05:27 PM
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Originally Posted by ScottyPPP
Nah, it has gears, just make sure you're in the right one. If you're calling a 2.1 laggy what do you think of a 2.0?
I went from 2.5 to 2.0 andall I'll say is dam!!!!!


Lol
Old 05 August 2015 | 08:01 PM
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Impressive claims. I wonder why subaru didnt do it
Old 05 August 2015 | 08:27 PM
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Originally Posted by boosted
Impressive claims. I wonder why subaru didnt do it

There are a lot of things Subaru didn't do, which is why they've squandered most of the goodwill and reputation that they built up during the rally years. I wonder how many Classic and Newage owners 'upgraded' to the hatch when it appeared? Not too many I'm sure.
Old 05 August 2015 | 10:13 PM
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Originally Posted by boosted
Impressive claims. I wonder why subaru didnt do it
The question is, why are you asking??
Old 06 August 2015 | 08:53 AM
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Originally Posted by ScottyPPP
The question is, why are you asking??
I ask lots of questions, it's what makes me so clever 👍😂
Old 06 August 2015 | 09:04 AM
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Originally Posted by ScottyPPP
The question is, why are you asking??
I ask a lot of questions! It's the only way you learn
Old 06 August 2015 | 09:06 AM
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So the mild stroker kit comprises of 2.5 crank, 2.0 pistons and I take it bespoke length conrods?
Old 06 August 2015 | 09:10 AM
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Got some 2.1 short motor for sale brand new build if anyone wants one

Ryan
Old 06 August 2015 | 09:15 AM
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Originally Posted by boosted
So the mild stroker kit comprises of 2.5 crank, 2.0 pistons and I take it bespoke length conrods?
There's a few ways to do it. All based around a 2.5 crank, but you can use different length rods, or stroker pistons. Mine has stroker pistons in it built into a SCDB.
Old 06 August 2015 | 11:31 AM
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Originally Posted by ScottyPPP
There's a few ways to do it. All based around a 2.5 crank, but you can use different length rods, or stroker pistons. Mine has stroker pistons in it built into a SCDB.
Rods/pistons need to be 2mm shorter. Interesting thought
Old 06 August 2015 | 12:37 PM
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Does this mean your build thread is going to get an update?
Old 06 August 2015 | 01:15 PM
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Originally Posted by ScottyPPP
Does this mean your build thread is going to get an update?
Negative. Remap next week.
Sub 2.0 FTW!
If I was going to break the 2.0 barrier, I would do it properly. Like what Andy F has done with his 3.6 flat six twin turbo, I could easily make something similar.
Old 06 August 2015 | 02:35 PM
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Originally Posted by boosted
Negative. Remap next week.
Sub 2.0 FTW!
If I was going to break the 2.0 barrier, I would do it properly. Like what Andy F has done with his 3.6 flat six twin turbo, I could easily make something similar.
That's a money where mouth is type comment that
Old 06 August 2015 | 03:34 PM
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Originally Posted by boosted
Negative. Remap next week.
Sub 2.0 FTW!
If I was going to break the 2.0 barrier, I would do it properly. Like what Andy F has done with his 3.6 flat six twin turbo, I could easily make something similar.
Fill ya boots then
Old 06 August 2015 | 03:41 PM
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Originally Posted by JGlanzaV
That's a money where mouth is type comment that
I don't need to prove anything to anyone! That type of project is easy for me, I've done loads of similar things in the past.
Doing a few different things with life now!
Old 06 August 2015 | 03:42 PM
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Originally Posted by ScottyPPP
Fill ya boots then
Ha see my comment above.
Doing a flat six biturbo is far easier than making that gearbox work. Trust me
Old 06 August 2015 | 03:47 PM
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Currently building a diesel compact tractor with backhoe attachement from scratch.
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Last edited by boosted; 06 August 2015 at 03:51 PM.
Old 06 August 2015 | 03:52 PM
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Needs a turbo....
Old 06 August 2015 | 03:55 PM
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Originally Posted by JGlanzaV
Needs a turbo....
No! It needs two


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