doubt about Compression Ratio if i boost my hatch
 

like some guys know ,im looking for to boost my SiR-II and i would like to run about 8 psi with T3/T04E stock internals.. so..

ive a table about compression vs boost..

http://img6.picsplace.to/img6/23/com...n_vs_boost.jpg

and its theoretically but.. if a run about 8 psi on my hatch with CR 10.4:1 i will run about 16 : 1 or so of CR????? :o is it not VERY high compression and it will blow my engine? i know good tune is necessary but.. after to see this im thinking in to add in my list of stuff for to buy a headgasket more thick for to down the CR... what do you think?

Re: doubt about Compression Ratio if i boost my hatch
 

sometimes i think im in HM"N/A" ;D i think though i run about 8 psi i will havent problems.. though my CR be very high :X

Re: doubt about Compression Ratio if i boost my hatch
 

Interesting chart, so me having 9.7:1 CR at 8 psi will be at about 15:1 CR

Re: doubt about Compression Ratio if i boost my hatch
 

This is what I have done....

B16 motor(totally stock) + 11.5 psi + good tune + 35K miles = NO PROBLEMS...still perfect compression all the way across.

Re: doubt about Compression Ratio if i boost my hatch
 

haha Walter is always good for a laugh

Re: doubt about Compression Ratio if i boost my hatch
 

walter, your CR w/ 8psi would actually be in high 12 low 13 not 16 :1 , sorry that i cant be more exact.
your chart is full of ---- :X

Re: doubt about Compression Ratio if i boost my hatch
 

oh ok, i deleted this chart already ;D

Zeusfire69 , 11.5 psi with b16 stock? :o , sound very awsome! , who tuned your car? and what EMS do you use?

ty for answers. ;)

Re: doubt about Compression Ratio if i boost my hatch
 

10-14# on a b16 with a decent sized t3 isnt big ----.
dont be afraid of 300hp, reliably.

Re: doubt about Compression Ratio if i boost my hatch
 

i was thinking run about 10 psi with T3/T04b but some guys did say me i will blown my engine :3 ... so i hope run 8 psi w/ this turbo . i got already injectors bosh peak&hold 450cc and resistor box today :y , o would like to make about 250 all stock :-X w/ my b16a2 :P ,reliable of course. :l

Re: doubt about Compression Ratio if i boost my hatch
 

Do what you can to drop the compression (thicket head gasket maybe), but you should have no problem running 300whp daily with a stock B16 as long as you have good tuning (Chipped ECU with Crome). What "PSI" you run doesn't mean anything, this number can differ quite a bit depending on your turbo and setup.