J. Funk

I am thinking of building an LS/Vtec but I have a couple of questions of what parts to use and what to expect out of them. This is NOT my daily driver.

1. What is a good rod and piston to use?

2. What compression pistons should I get?

3. I'm not going to sleeve it, so is a 81.5mm bore ok?

4. How much power would this be able to handle?

Thanks for your help

Schister66

1. Your choice of which piston and rod combo comes down to a matter of preference. The choice of rods is an easy one: Eagle. They're cheap and will hold more than enough power for your build. As for the pistons, there are a lot of good companies out there. I had always planned to use CP or Wiseco on my build, but i went with a set of Arias instead (because i got a hell of a deal on an Eagle/Arias combo).

2. The ideal static compression for your setup is dependent on your goals for your setup. If you could tell us your power goals, fuel grade and setup, it will give a little more insight into the correct static compression for you. Generally people go with a 9:1, but the higher the static comp, the better your off boost response. As you can see in my sig, i went with a 9.8:1 because i'm not shooting for crazy power and i'm running E85 which has a high octane rating.

3. Depending on your power goals, 81.5mm should be fine. Many of us run that bore size without issue. I happened to buy a block that didnt require an overbore; therefore, i'm running on the stock 81.06mm bore.

4. With the right setup, fuel and compression, you could make upwards of 500whp without issue. For a more streetable car, you should have no trouble hitting mid 400's on pump gas (92-93 octane).

Basically it all comes down to what YOU want. Once we know more about your goals and plans for the car, we can give you a better idea of compression and the "safe" range for this setup.

J. Funk

I haven't started building anything at all. I'm still in the planning stage. This car is not my daily so it does not matter if it is streetable or not. Its just my car to have fun in and take to the track. My goals are basically to max out an unsleeved block on pump gas.

SPOOLINmatt

manley h beam rods are also a really piece.

Schister66

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by J. Funk &raquo;</TD></TR><TR><TD CLASS="quote">I haven't started building anything at all. I'm still in the planning stage. This car is not my daily so it does not matter if it is streetable or not. Its just my car to have fun in and take to the track. My goals are basically to max out an unsleeved block on pump gas.</TD></TR></TABLE>

Well if you're looking for the most power (using pump gas) on a strip-only setup, you'll want to go with a rather low compression ratio and an grossly oversized turbo. I dont really see this being a great idea. If nothing else, keep your static compression higher and run race fuel. There's no sense in pushing your setup really hard on pump gas only.

J. Funk

I kinda wanted to stay away from race fuel. But if I had to use it I would. What do you think I should do?

Schister66

If you're going to shoot for "as much power as possible" on your setup, you're going to really limit yourself by running only pump gas. The way i see it is: if you're spending all this money on a nice turbo setup, what's another $6/gal for race gas if you're going to pick up another 100-150whp??

SPOOLINmatt

i usually run 116, guy at the track that runs it said that i should prolly run 112, its not as hard on the motor and that 116 plus is usually for high compression ****. I've never really heard that **** but im pushing around 675 and 30-32 psi. Either gas generally works in my setup just fine.