Compression Question
03-10-2007, 08:02 PM
#1
0.0 BAR
Thread Starter
Join Date: Mar 2007
Posts: 10
Compression Question
At what compression range is it safe to boost? Running stock A6 and want to know what to swap the pistons to in order to safely boost. Looking to boost under 10 have the turbo info and what not now need engine prep info. Help please.
03-10-2007, 09:12 PM
#4
0.0 BAR
Join Date: Mar 2006
Posts: 12
Re: Compression Question
if you only plan on 10psi the stock a6 block should hold fine just do a compression test and leakdown test to make sure its in good condition and then pop on your turbo
then be sure to tune it dont use a fmu or afc hack or any ghetto ---- like that
then be sure to tune it dont use a fmu or afc hack or any ghetto ---- like that
03-11-2007, 05:28 AM
#6
1.0 BAR
Join Date: Mar 2006
Posts: 217
Re: Compression Question
Originally Posted by slo_crx1
I've run (and will run again) 10.5:1 c/r on a stock block b16a at 14psi and higher before and never had any issues...it's all in the tuning. 
03-11-2007, 10:13 AM
#7
3.0 BAR
Join Date: Aug 2003
Location: NE-PA
Posts: 4,666
Re: Compression Question
Originally Posted by hany
do you made a changing in cooling system ?
03-11-2007, 06:20 PM
#9
1.0 BAR
Join Date: Mar 2006
Posts: 217
Re: Compression Question
Originally Posted by slo_crx1
Nope, other than going from my EF's full-size radiator down to an EG half-rad. I do use a product called water-wetter in the cooling system though, it breaks the surface tension of the coolant to aid in heat transfer.
03-11-2007, 07:52 PM
#10
0.5 BAR
Join Date: Apr 2006
Posts: 178
Re: Compression Question
damn thats high compression, im running 8.5:1 currently with plans to drop it to 8.1:1
but ive heard of guys running 12:1 properly tuned without a issue...
if you want to drop it just get some copper fat *** headgaskets, its the cheaper way, other than than you can bore out the combustion chamber on the head/s or use lower comp pistons...
10:1 is a tad high id be aiming for ATLEAST 9:1 to avoid detonation
but ive heard of guys running 12:1 properly tuned without a issue...
if you want to drop it just get some copper fat *** headgaskets, its the cheaper way, other than than you can bore out the combustion chamber on the head/s or use lower comp pistons...
10:1 is a tad high id be aiming for ATLEAST 9:1 to avoid detonation
