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> small bore, high revving 6, anyone running one now?
DanT
post Dec 18 2010, 10:12 AM
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I have the chance to acquire an 2.0L 6 case and have thought about building a small bore 2.0-2.5L high revving 6.
Anyone out there running such a combination right now?

This would be a street/AX motor. Prefer to do single plug.
Most likely use Webers, since MFI parts are getting hard to come by .
What combinations of Pistons/cams are you folks using?

Pictures of motor builds would be appreciated.

Just sliding in a 2.7L CSI motor is also a consideration if the small bore motor becomes too much of a pain. (IMG:style_emoticons/default/biggrin.gif)

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brant
post Dec 18 2010, 03:23 PM
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I put 100 racing hours onto a 2.0/6 with an aluminum case
it was all S spec, real 67S heads, cams, Counter balanced crank, pistons-cylinders, stock 2.0S rods
it was great and only 9.8 compression (factory)
147hp to the wheels at 5000ft of altitude on a 104F day is not anything to sneeze at for a stock motor

We would usually shift between 7200-7500 and loved it
the quick revs (5lb tilton clutch and flywheel) are awesome
I really like the small bore stuff and its so "right" sounding

new motor is a small spigot 7R case
(these are kinda hard to find, but slightly stronger than the 5R cases)

I haven't driven it yet, but can't wait
66 counter balanced crank, big valves, 81mm pistons of just under 11:1 compression, twin plug, Pauter rods, lots and lots of head work with race cams
shooting for a little over 200hp and probably will shift at 7500rpm
(although the safe zone is somewhere around 8,500 rpm)

builder said that rpm is only dependent on how long you want it to last

I'm a huge fans of the small bore motors
used to have an SC 3.0, and the motors are nothing alike..
really love the small bores.


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Posts in this topic
DanT   small bore, high revving 6   Dec 18 2010, 10:12 AM
jjackson   I have the chance to acquire an 2.0L 6 case and h...   Dec 18 2010, 10:31 AM
messix   are you sure you want small bore? a small bore wi...   Dec 18 2010, 10:59 AM
ME733   The ..2.0 six...had a short stroke...66mm.(same as...   Dec 18 2010, 11:23 AM
campbellcj   IMO you would not want a peaky small six for stree...   Dec 18 2010, 11:39 AM
campbellcj   IMO you would not want a peaky small six for stree...   Dec 18 2010, 11:39 AM
J P Stein   My old 2.7L would pull 7300 with all Porsche parts...   Dec 18 2010, 11:49 AM
sww914   They say the last 800 to get to 8000 will cost you...   Dec 18 2010, 12:57 PM
brant   I put 100 racing hours onto a 2.0/6 with an alumin...   Dec 18 2010, 03:23 PM
GeorgeRud   The 66mm crank with the 90 mm piston bore does mak...   Dec 18 2010, 03:41 PM
Mark Henry   If you're rebuilding all sixes work out about ...   Dec 18 2010, 05:20 PM
MikeSpraggi   Haven't driven it yet, but I've had a 2.2L...   Dec 18 2010, 05:51 PM
d914   I had a 2.5 liter short stroke six... loved it for...   Dec 18 2010, 05:59 PM
Cap'n Krusty   Ahem! I have an aluminum case, a long block, ...   Dec 18 2010, 07:54 PM
J P Stein   Ahem! I have an aluminum case, a long block,...   Dec 18 2010, 08:23 PM
jfort   Have a 2.5 short striker with E cam and short gear...   Dec 19 2010, 07:35 PM
Mark Henry   There's a set undersize rod bearings on the bi...   Dec 19 2010, 08:17 PM
koozy   :shades2: Hmmmmmm..... Whatcha doooooin??? :idea:   Dec 19 2010, 08:41 PM
Eric_Shea   I have Greg's 2.5 now. It will be twin plugge...   Dec 19 2010, 09:56 PM
DanT   Mike, I have always wanted to try a high revving 6...   Dec 19 2010, 10:22 PM
koozy   I should have saved the 2, 2.4 engines I had. The ...   Dec 19 2010, 11:45 PM
turboman808   Have a 2.7 with some work that revs to 8000 rpm. ...   Dec 20 2010, 12:00 AM
Michael N   Dan, Since you are so close to my house you are w...   Dec 20 2010, 01:38 PM
Michael N   ...   Dec 20 2010, 01:45 PM
ONTHEGRIND   Michael if he doesn't I will lol I am also in ...   Dec 20 2010, 03:21 PM
DanT   Thanks Michael.... over the years of instructing a...   Dec 20 2010, 05:13 PM
campbellcj   For years I dreamed/planned to build (er, have som...   Dec 20 2010, 05:18 PM


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