what compressions best
 

I'm building a ls b18a. all stock exept pistons and rods. already have a set of eagle rods and its time to order the piston. See I know the lower the compression the safer to boost but at what point is the compression so low it hurts overall performace. I'm looking to boost as much as possible and make the most power i can on stock sleeves but its my daily drive and can't affored to blow agin. it's runig a t3t4. So please give me some insight.

Re: what compressions best
 

9:1 is perfect.. not a slug out of boost and good hard pull in boost

Re: what compressions best
 

I would say nine is perfect but i read a article last month(somewhere on the web)about a dude who blew his 9 compression motor, built a replica except with a 8 compression. Results were like 2% less effectiant @ i dentical boost.

but then they tunred up to boost op the 8 comp and Owned...

Re: what compressions best
 

Whats the most 8 to 1 compression motors can boost on stock honda sleeves.

Re: what compressions best
 

no real answer, its all in the tune

Re: what compressions best
 

10 flat with a nice amount of boost. :6

Re: what compressions best
 

8.5 works good, but I'm just talking out my ass.

Re: what compressions best
 

Re: what compressions best
 

More seriously though...

this man is onto it.

the lower you go the more you can push into it safely on crappy pump gas. (excluding the sleeve issues)

i wouldnt go lower than about 7:1 though as you might have trouble starting it below that. 8:1 should be good for about 30psi on 98ron/93aki 9:1 good for 15psi or so.

point being that the negative aspects of going lower are grossly overstated virtually everywhere on the net...

Re: what compressions best
 

9.1 - 9.5

Re: what compressions best
 

mid 9's for a street/strip engine.
if you're good you can do 10-10.5. you're not that good

Re: what compressions best
 

Id go with anything from 8.5-10.0 just whatever you can find cheap works also :y

Re: what compressions best
 

Imo something around 9:1 would be perfect for an dd boosted car on stock sleeves. I am currently running 10:3 . No boost guage but i think i should be pushing 6-8 psi . Feels really good but i see some thing in the range of 8:9- 9:3 in my near future before i turn it up to 12 psi. Hope this helps