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Post by warpspeed on Dec 1, 2023 21:51:53 GMT
I remember those from when I was a little Fella in the UK.
Practically unknown here in Australia.
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Post by atlex on Dec 5, 2023 10:14:21 GMT
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Post by atlex on Dec 5, 2023 14:58:58 GMT
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Post by dadbif on Dec 8, 2023 8:38:50 GMT
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Post by atlex on Dec 8, 2023 10:40:31 GMT
Really interesting and honestly I need to watch it a few times to understand bits :-) |
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Post by warpspeed on Dec 8, 2023 18:43:10 GMT
There have been some very ingenious forced induction systems developed over the years, particularly compounding.
If this topic interests you, there is the book "Turbocharging and Supercharging" by LJK Setright ISBN 0 85429 1849
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Post by dadbif on Dec 8, 2023 22:47:25 GMT
ā LJK Setright ā
My all time favourite automotive journalist. A true poet with his descriptions.
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Post by atlex on Dec 12, 2023 8:54:59 GMT
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Post by atlex on Dec 12, 2023 9:05:01 GMT
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Post by atlex on Dec 13, 2023 15:25:34 GMT
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Post by warpspeed on Dec 13, 2023 23:08:12 GMT
Haha, this is pretty much EXACTLY what I am doing combining a B M W 318iS block with a Mazda BP-4W cylinder head, and for all the same reasons and advantages. Head bolts straight onto the block, bore spacing and head bolt spacing use exact same 91mm centres. B M W crank has main bearings 10mm larger diameter than BP main bearings, and with a very slightly shorter stroke. Bore is a larger 85mm, creating 1.9 litres (318iS engine). Much better bore/stroke and rod ratios ! Overlap between main and rod journals of B M W crank is much greater creating a stiffer stronger crank. Plenty of alternative crank choices too, from 1.6 liters forged fully counterweighted, up to 2.1 litres with the long stroke cast diesel crank.
And all the super strong B M W gearboxes and clutches bolt straight up, plenty of options there. (4,6, and 8 cylinder B M W bellhousings all interchange).
For example, factory 500Hp M5 twin turbo V8 clutch can be put on to the 4 cylinder engine with factory parts, or anything up to that level clutch all with full B M W factory durability and drivability.
B M W deck height is taller than BP by 5mm I think it is, and stock 140mm B M W conrods give a much better rod ratio. Its a deep skirt block, and there is a very strong factory girdle plate available. Possible to build a very strong high Hp capable engine from low cost second hand B M W parts. With a Mazda head, it still looks like an original Miata engine at first glance.
Its a very long term project, but I am doing this myself right now. |
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Post by atlex on Dec 14, 2023 9:05:16 GMT
Haha, this is pretty much EXACTLY what I am doing combining a B M W 318iS block with a Mazda BP-4W cylinder head, and for all the same reasons and advantages. Head bolts straight onto the block, bore spacing and head bolt spacing use exact same 91mm centres. B M W crank has main bearings 10mm larger diameter than BP main bearings, and with a very slightly shorter stroke. Bore is a larger 35mm, creating 1.9 litres (318iS engine). Much better bore/stroke and rod ratios ! Overlap between main and rod journals of B M W crank is much greater creating a stiffer stronger crank. Plenty of alternative crank choices too, from 1.6 liters forged fully counterweighted, up to 2.1 litres with the long stroke cast diesel crank.
And all the super strong B M W gearboxes and clutches bolt straight up, plenty of options there. (4,6, and 8 cylinder B M W bellhousings all interchange).
For example, factory 500Hp M5 twin turbo V8 clutch can be put on to the 4 cylinder engine with factory parts, or anything up to that level clutch all with full B M W factory durability and drivability.
B M W deck height is taller than BP by 6mm I think it is, and stock 140mm B M W conrods give a much better rod ratio. Its a deep skirt block, and there is a very strong factory girdle plate available. Possible to build a very strong high Hp capable engine from low cost second hand B M W parts. With a Mazda head, it still looks like an original Miata engine at first glance.
Its a very long term project, but I am doing this myself right now. which 318iS Block - Mean from what what model/year ? I'm guessing E30 :-) |
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Post by atlex on Dec 14, 2023 9:05:24 GMT
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Post by warpspeed on Dec 14, 2023 12:55:10 GMT
which 318iS Block - Mean from what what model/year ? I'm guessing E30 :-) I believe the 318iS came out first in the E30 series, but is optional in many other later cars fitted with the (poverty pack) smaller engine. From what I was told, my own 318iS came from a wrecked low mileage Z30.
As you will probably know, the 318iS is 1.9 litres with an 85mm bore. The 318 is 1.8 litres with an 84 mm bore. The blocks are otherwise identical. B M W used this same block in their Formula One turbo engine, back in the turbo era. Its definitely a strong block !
If you wish to test out the theory, compare a 318/318iS head gasket to a BP block, and be prepared to be amazed.
All these cars were fitted with either four or six cylinder engines, and anyone fitting a new engine these days, always go for the six, which bolts straight in. The B M W guys look down their noses at the unloved four banger, and nobody wants them. So they sell complete for pretty much scrap value, even the really good lower mileage ones. People just want to get rid of them after an engine upgrade.
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Post by zoona on Dec 14, 2023 15:13:00 GMT
which 318iS Block - Mean from what what model/year ? I'm guessing E30 :-) I believe the 318iS came out first in the E30 series, but is optional in many other later cars fitted with the (poverty pack) smaller engine. From what I was told, my own 318iS came from a wrecked low mileage Z30.
As you will probably know, the 318iS is 1.9 litres with an 85mm bore. The 318 is 1.8 litres with an 84 mm bore. The blocks are otherwise identical. B M W used this block in their Formula One engine, back in the turbo era. Its a strong block !
If you wish to test out the theory, compare a 318/318iS head gasket to a BP block, and be prepared to be amazed.
All these cars were fitted with either four or six cylinder engines, and anyone fitting a new engine these days, always go for the six, which bolts straight in. The B M W guys look down their noses at the unloved four banger, and nobody wants them. So they sell complete for pretty much scrap prices, even the lower mileage ones. People just want to get rid of them after an engine upgrade.
Mental. Where can i read more about you prroject? (i've just bought an e30 with an M52 in it... but i don't have the old m42 fortunately) |
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le sigh
Jul 15, 2023 20:03:52 GMT
le sigh
Jul 15, 2023 20:03:52 GMT