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Which Red Motor?

I am going to rebuild a red motor and would like to know which is best.
I have heard some say its better to rebuild a 186 than the 202 why is this?

I will be using a yella terra head.
A mild cam Im keeping it auto (Im to lazy to change gears)

Any info would be helpful.

Ron

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Ron, alot of people will tell you that the 186 block is the way to go, but no one has been able to give me a real reason why, i see no reason that there is any difference except one has a bigger capacity (3.3ls v's approx 3l's) and im sure you know the saying, you can't beat cubic inches. I had a 192 block which i took the head and cam etc out of and put into a 202 block and there was a slight increase in low down power and other than that i believe there is SFA difference, maybe it would use a drop more fuel, but on the other hand if its making more power then it should be more efficient and therefore use less fuel .... its a matter of opinion.

Sammy.'

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Howdy guys, I might as well throw in my 2 bobs worth.........you will find that the 186 was prefered for various reasons, first being that usually if you modified an engine for more power, you had to rev it harder to get that power{up in a cams range} with that in mind the throw on a 186 crank is less than a 202, and this places less strain on the rods etc, hence,less breakages.....and also the throttle response is quicker, which makes an engine react quicker when nailed...the throw on a crank is one of the main factors when designing an engine, thats why the ford 250 sixes arent to popular, not saying you cant get them to go , but you get the drift....some of the engines that have this sweet, throw versus stroke ratio just right are the 327 chev, which actually produced more power than the 350, in its time !....and the 186, and those 4 cyl cortina engines, Im not sure which ones, Im a holden/ chev fan, but those things rev and go very well, also the rare 302 chev, which has the stroke of a 283 and the bore size of a 350......anyway, Ive said my bit, thanks guys...oh, some of the earlier 186 blocks also had more cast webbing around the mains, which made for a stronger block....Cheers, Pete

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Id be going for the 179 HP. They came with a steel crank as standard, and the block is actually stronger due to more nickel being added in the cast. I think they also had fatter webbing in the block too. A 179 can be bored to 192, so there's your cubes if you want 'em, and you don't have the crank throw problems of a 202. The other reason I wouldn't go for a 202 is the bore/stroke ratio. The 202 has a stroke of 3.25" and all other red 6's had a stroke of 3". This is why a 186 will always out rev a 202 and thats where the power is, top end. A good set of roller rockers and a balanced bottom end will see a 179/186/192 rev to 6500rpm and pull like a (TYPO

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theres a few things you need to keep in mind though, firstly to have a motor rev that hard and to use the rollers etc you need to spend alot more $$$ also 6500rpm in town is not very practical, and to top it all off, the higher the revs the more the engine is wearing.

Sammy.

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Quote "A 179HP can be bored out to 192"

So can a 186.

If you are going to go 192, then you may as well start with a 186?

Unless you want rev to 6500 rpm, which as Sammy said is not real practical around town (Or on the highway) Then in my opinion go for a 202 Blue motor.

The fact is proven that the NEW cast Yella Terra Blue 12 port type heads flow s-loads more than any red head.

A set of Duralite pistons, 40 thou over (approx 206ci), extractors, your choice of induction with a suitable cam, and you will have more power than a 186 built with the same gear.

My opinion, but do whatever you want, and I wont bag you for it.

Peter

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Peter, i have finally found someone who thinks the same as myself about the blue motors and 202s ... good to see!!

As i run a fairly worked blue 206 which i haven't had a drama with i tend to stick up for them and with my experience with 179/186/192 and 202's, for a street motor prefer them, i guess mainly because i can run my EFI with it :)

Sammy.'

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