BrewerBob

Ok, I have an '85 GS 12A that is going to be an autox/track car in the state of SC. How much of the emmissions stuff can I get rid of? Which vacuum hoses are needed for operation versus polution control?

There are no state inspections in SC and no smog laws. Most of the vehicles around here could moonlight as mosquito trucks.

BrewerBob

Anybody?

RotorMotorDriver

iTrader: (1)

Pratch did a rats nest removal turtorial. Im not sure what the URL was though, sorry. I know that there is LOTS you can get rid of though .

~T.J.

dingo

http://maz_tutorials.totalimmage.com/ there you go, it's the "Removing the Rats Nest"

82transam

iTrader: (18)

pretty much everything can be ditched. If I remember righ the 12a can be simplified to only using 1 vaccum line, and tahts for the brake booster. I could be wrong on that though

DriveFast7

iTrader: (1)

keep the brake booster line that plugs into the manifold.
keep the vaccuum advance for the distributor if you want it. i ditched it for simplicity and just rely on centrifugal adfance.
ditch/plug/cap everything else.

BrewerBob

The trees are dying as I type.

Thanx.

BrewerBob

By the way, what kind of gains are made by doing this (in hp)?

syklone

In regards to the rats nest, what if you want to keep your AC. Do you have to keep any of the nest for that?

FB II

it's in the tutorial i believe; but i think it's only one line? yea

wwilliam54

im going for 2 vac lines
brake booster and secondarys

but other than that
my enigne bay should be clean

SilverRocket

Secondaries, what? The rat's nest doesn't have anything to do with the vacuum secondaries on the carb, are you describing something else?

wwilliam54

im takeing off all the vacume lines (inc rats nest) cept for the brake booster and carb secondaries vac liens

piston pounder

Good luck finding those lines for the secondaries,they dont exsist!, its all internal on those Nikki's. Just run the B-booster line and remove the spring for the secondaries.

wwilliam54

hehe
i got pwned

but its ok I havent had a chanch to really look at my carb anyways
why remove the springs?
wont that make teh secs. open too early

hornbm

absolutely none. It just simplifies things and cleans up the engine bay.

SilverRocket

Don't remove the secondary spring (just one spring), it will suck. If you want you can cut it down about to about 2/3 of its normal length, but it doesn't make a whole lot of difference, I'd say it's not worth the trouble.

82transam

iTrader: (18)

go mechanical on the secondaries

BrewerBob

Isn't that a lot of work for nothing then? The writeup sounded like a pain in the butt.

SilverRocket

I'm not sure it's fair to say "absolutely none".

Beyond that, the simplicity is key, and if you're interested in ever installing an aftermarket carb you have to do it anyways.

BTW, it's an easy job - a couple hours max.

wwilliam54

i dont see any advantage over vacume control

in fact I think vac has quite a bit of an advantage since it opens the secondaries based on engine load rather than RPM