Ok, this has probably been discussed but i'm just wondering, if i want to build up the KA, and get the compression down to 9:1 or 8.5:1 how would be the best way to go about doing that? and if i do get the compression down around there am i gonna be stuck with a gutless car till i turbo it?
and if i would be to get a 3inch exhaust but was running it on the stock lower compression engine, would it end up scavenging and sucking away my power?
a thicker headgasket will also lower compression. a 3in. exhaust will give you power while you're still NA, but you'll lose a lot of your low end power.
not entirely true. my brother had all bolt-ons and 3" exhaust on his s13 and it would keep up with my altima no problem. he lost no power anywhere in the powerband.
well i'm going with other people (that i know personally) and personal experience. when i got my exhaust done (only 2.5"), it lost a lot of torque, making the low end seem weak, but the top end improved greatly.
Ok, this has probably been discussed but i'm just wondering, if i want to build up the KA, and get the compression down to 9:1 or 8.5:1 how would be the best way to go about doing that? and if i do get the compression down around there am i gonna be stuck with a gutless car till i turbo it?
Since you'll be going turbo, the smart way to lower the CR is to go with forged custom pistons. It turns out that OEM KA pistons have a habit of breaking the upper ring lands with turbo charging so there's a good reason to go with forged..
With 8.5:1 CR, you'll be down a bit in HP but you should still have a good performing car. Why don't you hold off on the 3" exhaust until you install the turbo.
Jim Wolf Technologies is a well respected company. JWT uses Arias pistons, which is high silicon content so tighter tolerance can be used. No piston slap. Arias is a well respected company and has been around for many years.
I have a KA-t and you can run it on stock internals. We have quite a few guys running stock internals up to 14PSi some higher but it all goes to what engine management your using. A engine will only last if your tune is good. I run a JWT on my 95 it is awsome. I run 14-18psi buttt...and a big butttt...I have a fully built motor. I have Eagle rods, Aris 8.9 pistons. You can do around 300-350HP with stock lower ends if your compression is good.
Linear Mode
