Civic EG

hey guys,

just a quick question, would a boosted d16z6 with a built bottom end and minimal head work yield more torque than a b16 or ls/vtec NA swap with I/H/E?

i'm lookin for about 250whp with the boosted D properly tuned...what kind of torque numbers do the B's throw up? i know they have to rev to the moon for their power.

thanks for the input,
James

Short answer, yes.

If your Running a Boosted D running 250 Hp you will be smoking "stock" Lsvtec's / b16's

You should have more torque. However it will depend on your setup. If you run a smaller turbo you will have torque low in the power band. If you run a bigger turbo you will less torque in your power band.
Both will yield more torque then the B's stock. However having it lower in your power band should yield more effective for Daily Driving/Auto X.

If you are building a bottom end I would recommend at least Stock Compression Pistons and Forged Rods, and possibly Rings. Then if you Boost you don't have to turn up the Psi to make up for lost compression. Also if you have problems with your turbo system, i.e. a boost leak you wont be super slow. I beat a "Built" z6(Forged Rods, Rings, Block guard, Vitaras) when he had turbo issues with my Stock z6. Why? Because he had lower compression pistons and was making less power then my z6.

That said, I would still recommend Nitrous, Dont wear out your engine as much. Have less issues to go wrong as its a much less complicated sytsem, No oil lines to run, etc... I have scene more then 1 Turbo'd Honda have boost issues at the "track". Turbo systems can be awesome, However I love the simplicity of Nitrous. However there is no free lunch. Nitrous will probably cost you more money in the long run, but be cheaper in the short. 400 Bucks will get you a Nice wet kit that can safely get you an extra 100hp with a good tune. Unless you go with a Home made setup a Turbo system, You probally wont yield the same results.

thanks for all the info guys,

it's not going to be a "drag" car as much, it's gonna be a street pounder and track on the weekends most likely, so i think nitrous is out of my books on this one, i'm glad to hear that it will have some good potential.

i guess the next question is, i was planning on using the eagle/vitara combo but i'm kind of concerned that the CR will be too low because the rods are going to be too short so it wont make it to the deck.....

what's the stock CR on the Z6 head/block? if i wanted a CR that would get about 260whp on 10-12psi for DD, what would you recommend?

plus, having a higher CR gives you some low end torque correct? thanks again for any help, just trying to get it right!

a higher CR will increase power across the power band.

If your that worried about the compression then get the custom length rods. Though I will tell you I have standard length and vitaras and with my cast mani I had great low to mid torque. But now that I have goneo a full ram the low to mid power has fallen off a bit (which is expected) but there is no way you can tell that my compression is that low.

if you have vitaras, your compression is at or below 8:1.

d-mon wrote:if you have vitaras,with standard length rods your compression is at or below 8:1.

Fixed that for you.......

even with FJ's custom (5.458" or 138.63mm) rods your CR is 8.35:1
still considerably lower than stock @ 9.14:1

d-mon wrote:even with FJ's custom (5.458" or 138.63mm) rods your CR is 8.35:1
still considerably lower than stock @ 9.14:1

Sure is but thats where the turbo comes in to play. People get a little hung up on the compression thing to be honest. Plain and simple they work

my vitarra dsm t25 build yeilds 210wtq at 3800rpm. Of course im spiking 20psi in that range. (but she's built to handle it)

Good luck