You will not be disapointed with it Luke be good to see what power yours will get should be more than you need 500+ with water meth

2.4L 1320 Harrop Build
#21
Posted 02 April 2017 - 02:30 PM
#22
Posted 02 April 2017 - 02:45 PM
#23
Posted 02 April 2017 - 08:28 PM
I find it amazing how a crank designed for 150 ft/lb copes with all the extra torque. Same with the Z20LET cranks too, somehow they all seem to cope. Maybe the OEMs add extra mass to them deliberately to help with smoothness and Euro 4/5. Anyway it's a bonus for us.
eh? Emission control legislation has nothing to do with crankshaft design, and the extra mass will actually result in a weaker crank due to greater oscillating mass (thus flex).
Generally the bottom end is significantly over spec'ed to cope with worst case knock scenarios.
I had a friend who had a Vauxhall V6 engine and he remarked one day that his flywheel had to have extra mass added to it to pass some emissions control (for the USA). Hence I was postulating adding mass to the crank would do similar.
I doubt adding mass to the main bearings would affect things adversely, more surface area for the shells and hence less pressure would presumably extend their life and help reduce the chance it snapped from excessive torque or knock.
Coping with bad knock sounds a very sensible reason for their seemingly huge strength.
Sorry Nev, that still doesn't make any sense, particularly as the US spec engines will use a different flywheel as they're coupled to automatic transmissions.
L81 flywheel for automatic transmissions
L81 flywheel for manual
#24
Posted 02 April 2017 - 08:58 PM
That's the very stuff I've bought in aluminium colour as it's had great reviews and seems very touch stuff.Oooh another engine modding project. Great stuff. Hope it goes well. What engine paint? I was considering por15 enamel if i have time
#25
Posted 02 April 2017 - 09:01 PM
I hope so Nev but will see what it can achieve with just water first then look to add methanol. For help with crank stress the Ati pulley will be getting fitted. The USA lads recommend this as a modification that's 100 percent needed if your going for big power http://www.atiracing...inks/pr/ecotec/Your spec appears to be significantly different again to both Lee and Richard. Good to see you guys all doing different things. Will the 1320 puff all the way to 500 BHP? I find it amazing how a crank designed for 150 ft/lb copes with all the extra torque. Same with the Z20LET cranks too, somehow they all seem to cope. Maybe the OEMs add extra mass to them deliberately to help with smoothness and Euro 4/5. Anyway it's a bonus for us. @Mods: Wouldn't this thread be better in the projects folder?
Edited by haggi961, 02 April 2017 - 09:04 PM.
#27
Posted 20 April 2017 - 10:04 AM


#28
Posted 20 April 2017 - 10:25 AM
Thanks batman for getting me the block Quite alright sir haggi
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You not been feeling the love, Joe?
These Harrop builds are really getting serious. I thought 260bhp was scary.
#29
Posted 20 April 2017 - 11:40 AM
Sorry it wasn't batman that got me it. I will thank Joe in person with a pint Of water 😃Thanks batman for getting me the block Quite alright sir haggi
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#30
Posted 20 April 2017 - 12:46 PM
#31
Posted 20 April 2017 - 04:23 PM
You sure I didn't get you it? Let me have a quick look on Facebook messager.. oh yeah it was me! What is it with northerners not saying thanks. No manners up thereSorry it wasn't batman that got me it. I will thank Joe in person with a pint Of water 😃Thanks batman for getting me the block Quite alright sir haggi
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#32
Posted 20 April 2017 - 04:36 PM
You sure I didn't get you it? Let me have a quick look on Facebook messager.. oh yeah it was me! What is it with northerners not saying thanks. No manners up there
Sorry it wasn't batman that got me it. I will thank Joe in person with a pint Of water 😃Thanks batman for getting me the block Quite alright sir haggi
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Northern Monkeys lol
#33
Posted 20 April 2017 - 04:54 PM


Edited by The Batman, 20 April 2017 - 04:55 PM.
#34
Posted 20 April 2017 - 09:44 PM
You seen my mum, i reckon she would make you her bitch 😂I will have a word with his mum next Wednesday. Right after I teach her some manners she's been a naughty girl
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#35
Posted 20 April 2017 - 09:49 PM
#36
Posted 20 April 2017 - 10:02 PM
Anyway my crank has been balanced and polished along with balancing of the flywheey, clutch and trigger wheel. Block was dropped off today with Rods and pistions. Block is getting honed and skimmed and piston and Rods are getting balanced. Cams are the problem now and only thing stopping me from completing the build.
Excellent - did you forget to thank Joe for that also?
#37
Posted 20 April 2017 - 10:09 PM
#38
Posted 21 April 2017 - 11:31 AM
Anyway my crank has been balanced and polished along with balancing of the flywheey, clutch and trigger wheel. Block was dropped off today with Rods and pistions. Block is getting honed and skimmed and piston and Rods are getting balanced. Cams are the problem now and only thing stopping me from completing the build.
Why honing instead of changing the liners?
#39
Posted 21 April 2017 - 11:34 AM
#40
Posted 21 April 2017 - 12:52 PM
And the Gen 3 liners are cast-in, so no liner change possible...
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