using a b18cr crank will result in a 1.9 litre. 87mm crank vs 89mm b20/gsi crank
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using a b18cr crank will result in a 1.9 litre. 87mm crank vs 89mm b20/gsi crank
Techincally closer to 2L than 1.9L lol !! :PQuote:
Originally Posted by yaz_gsi_my_titz
1956cc ..
I get 1932cc...
84.5?? Hmmm
irrellevant, using a 89mm will give you more capacity
<= blindQuote:
Originally Posted by ewendc2r
So? Itr stroke will rev better and the difference in cc is **** all .. Better r/s ratio, fully counterweighted, and the small difference in cc can be made up with a small increase in bore ie 85 mm ... In fact, without going to 92mm crank with tall deck, this is supposedly the best base for reliable performance.... Just more $$ than 89mm crankQuote:
Originally Posted by GSi_PSi
lol how much is an 89mm crank...Quote:
Originally Posted by ewendc2r
i got an itr crank rod and pistons for 200 wnd hand and in good nick
and doesnt look like they will ever see my b16b
if you want a reliable long lasting b20 i suggest you use the standard crankshaft 89mm which is already balanced from factory and dont mess with the already thin sleeves.
Using a ITR crank will decrease capacity and torque. the B20/gsi 89mm crank is free with a b20 engine lol. otherwise it wont be more than 50 bucks
Yep cheap enough -- but they don't come in a 84mm+ bore do they.. I mean, you have to spend time and or money installing it into the block.. More $$ than simply changing rod bolts for a budget build. Likely need to get an align hone to make sure mains are correct and measure for bearings / journal clearance.. more $$ ...
Thats what i'm getting at. 89mm is used primarily because its the easiest - the B20B comes with the crank already in it.
Race application most people use either 87.2mm crank or 92mm crank in the states ... 95mm crank is mainly used only for drag races it seems due to increased bearing and side loading.
Even some of the reputable engine builders on this forum have recommended itr crank for high performance application and that the difference in actual output is minimal.
edit -- when i say race application, i mean the big budget guys.
GsiPsi i am looking to go sleeved block mate. And there are harmonics issues with the b20 crank at high rpm. I'm talking endurance motor capability.
I'm just thinking fo the rod/stroke ratio and longevity of engine... The B20 Crank is lighter than the ITR crank though ....