vtecsyndrome

how much boost can u have until u need an ignition system?

SuprAdam

You win the prize for vaguest post ever.

Car? Engine? Turbo size? Fuel system specs? EMS specs?

vtecsyndrome

i wanna boost a b18a, i debating between goin vtec or not with it, but i do know I want a quick spooling turbo for low and mid range power. I dont really want to rev past 7500 or so. And i want a good amount of boost anything between 14 - 20 p.s.i. But i still new in this, think u can help me out?

DSMonster

In my car the stock ignition system is good for 850whp

The compression of your motor will play a bigger part to how much boost you can safely get away with, then your igniton system will. To run the boost you'd like to, you'd have to build your self a nice bottom end. You could have the best igniton system available, but if your still on the stock bottom end theres no way you'll be running 20psi.

Advice.....research, research and more research.

vtecsyndrome

ya, i do intend to build the bottom end. ACL Bearings, Arias forged pistons should do with stock connecting rods and a type R crank, rite? im obviously aiming for a 9:1 compression ratio, with the amount of boost i looking to play with.

B6T

I would be putting forged rods in there too if I were you... for that extra margin of safety.

DSMonster

How will you be controlling your timing? 9:1CR is still pretty high for a boosted car on pump gas. With a stock timing map I can only get about 15-17psi before I start to see too much knock(also have 9:1cr). I have been running about 25psi with the help of WI, but still have to pull a good amount of timing out to keep from knocking.

zman

iTrader: (1)

i know people running 20psi (on a honda...b16 to be more specific) on stock honda ignition systems....the amount of boost isn't the limiting factor, its the amount of power.
I beleive honda ignition systems are good for around 400-450whp.
Tune with crome, thats your best bet. You can have complete control over fuel/ignition delivery, and run as much as a retard as you want (i would start with about a .75 degree retard per psi) or even run a step retard (which is what i would do).
Stock rods will be your limiting factor of how much power you can make. If you wanna play with the big boys, i'd highly suggest getting forged rods as well.

vtecsyndrome

cool.... now about that vtec. with a quick spooling turbo, u think i should get a vtec head and bring down the vtec to, let's say 4500 or so. have the vtec at about the middle of the turbo's range. or do you think it's more reliable if i keep it a non-vtec turbo setup?

now that i think about it, i think im gonna go all motor

xcivicnationx

you need to do some research kid. hopes and dreams don't build motors, money does, set yourself a budget and go from there.

vtecsyndrome

ya i know your right, i think im gonna drop just a B16 cause its cheap,
have an LSD put in the tranny. As i'm ridin that, I'll build my bottom end.
The way things look, a turbo is a dream , i would love one, but not yet.
Some Type R goodies doesn't sound that bad either.