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Engine Spec

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#1 bajean


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Posted 07 January 2019 - 09:34 AM

Having upgraded my minis suspension and brakes all round, its finally time to build the engine. What do you guys think, this will be a fast road car and track day toy :

1275 a plus block
webcon 7 port head ( ported with med valvetrain 30/35 )
weber 40 dcoe
11 head studs
forged omega pistons + 0.060 6cc dish
specialist components forged rods with 18mm pin
balanced, polished, lightened and cross drilled crankshaft
med centre main strap
med ultralight en24t flywheel

Edited by bajean, 07 January 2019 - 09:35 AM.

#2 KTS


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Posted 07 January 2019 - 11:06 AM

choice of camshaft is the key factor in determining the operating characteristics of the engine


decide how you want the engine to perform (..how frequently you'll need to rebuild it is part of this!), select a camshaft to suit your requirements and go from there


there's plenty of threads in the forum covering camshaft selection - have a look at them to help you decide what may work for you

#3 bajean


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Posted 07 January 2019 - 11:25 AM

Oops my bad i forgot to list my cam ill be using a med xt cam with 1.5 ratio roller rockers ( power band is between 2500- 7200 ), but a friend of mine made peak power at 7k with the same cam and engine specs

#4 nicklouse


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Posted 07 January 2019 - 12:00 PM

why fit 1.5 rockers? what are you hoping to gain?


with more cams been made from blanks the need of 1.5 rockers is almost negated just select a cam that give what you want and reduce the loads on the valve train which will give you a much longer lasting build.

#5 cal844


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Posted 07 January 2019 - 03:44 PM

Personally I'd just get the block measured and go next size up, you won't be gaining alot when compared to gains in head work etc

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