Wouldn't lowering the compression compromise drivability off boost, and upping the boost will only mean it will take longer to come on to boost, therefore compounding the situation?
I'm going low blow (8psi) on stock with stock internals. This will retain the B's drivability and give cracking performance anything aver 4k rpm. As far as I have found, this is what most people do, as opposed to lowering their comp.
Wouldn't lowering the compression compromise drivability off boost, and upping the boost will only mean it will take longer to come on to boost, therefore compounding the situation?
I'm going low blow (8psi) on stock with stock internals. This will retain the B's drivability and give cracking performance anything aver 4k rpm. As far as I have found, this is what most people do, as opposed to lowering their comp.
B16 your correcting in saying that lowering the compression will compromise drive-ability. But its not a massive ammount..well not in my case. I think stock compression is 10.4 or 10.1 mines 9.1 you can also go 8.1 in some cases that wanna run upto 30psi lol.
But when you say this:
"upping the boost will only mean it will take longer to come on to boost, therefore compounding the situation?"
I think you might be confusing yourself. Upping the boost wont slow down the spool process it will just take longer to hit maximum psi. But thats why you see alot of conversations on here about the correct turbo to buy because its hard to get the exact spool time compared to Power you desire. Also exhaust manifolds, and wastegates come into play with this also.
Personally though i do think that higher CR setups on boost feel much better to drive daily but you wont get the safety or those massive HP numbers unless you go Lower CR and higher boost setups. Not everyone goes the High CR and low boost setups on here. Alot of guys have fully build motors.
i have dropped my comp ratio to 9.0:1 approx, but only using a baby 2871r for now i guess.
making 245kw on 16psi.
and 200kw on 10psi.
yes it laggier, yes it isn't as reponsive as when it was 10:1.
but hell, i want it to last, safely, and not risk such as a bad batch of fuel and boom.
im running 9:1 with 2871r, similar setup. im going for around 20psi max and 10 psi daily with boost controller after i finish my rings and bearings rebuild. 245kw...nice my aim was anything above 300hp atw's.
It also depends on how you drop compression, by pushing the head away using a thicker head gasket or keeping the head close to the deck and using lower comp pistons.
It also depends on how you drop compression, by pushing the head away using a thicker head gasket or keeping the head close to the deck and using lower comp pistons.
This is a very good point, a lot of people are assuming 10:1 comp is the same no matter how it is a achieved.... the fact is combustion chamber shape does play a big part in burn efficiency and detonation resistance.
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Originally Posted by FastFwd
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