nismo-max500

jw. probably a dumb question. but i have never messed with it or found an answer. thanks i got a 5spd

Chris91SE

iTrader: (1)

nope...it's independant of transmission

jwtarbaj

You can advance the timing on either one. I wouldn't recommend going over 20 degrees BTDC but I know some have. Make sure you use Premium fuel also.

nismo-max500

you think there are any future problems i might have with the method of advanced timing? does it hurt the car? thanks again

jwtarbaj

What it can do is cause pinging or detonation. That is why I said to use Premium fuel 91 octane or higher. I would go with a good 92-94 octane. I use Amoco Gold with timing set at 20 degrees. No problems with 153K on the odo. The higher octane gas will counter the timing advance. I wouldn't do this if your car is not running well to begin with.

nismo-max500

i know it increases performance. but how does it exactly?

sublunary

iTrader: (2)

engine fires sooner through eacher cycle, will decreese gas mileage a little since more gas is used up.

93maxVG

Do you think its a bad idea to advance timing on an auto with a broken exaust manifold stud? Wasn't sure.

sublunary

iTrader: (2)

i wouldn't think that it would make any difference but in theory your engine is working a little harder so...

jwtarbaj

It could cause the other studs to break sooner. But if one is broken more WILL break with age if you don't get them replaced anyway.

93maxVG

I asked a friend today about advancing timing. He said the small HP gain isn't worth the loss in gas mileage. Do you guys think this is true? Also, people are talking on here about advancing 20 degrees! Is that advancing TO 20, or advancing 20 MORE? Do you know what the stock timing is??????

93maxVG

Any body?? I know its late. But is advancing worth it?

The Flem

theres not a whole lot of adjustment in the distributor without pulling it and restabing it. just loosen the screw and turn the dist. till idle goes up and tighten the screw. if you dont like it then undo it. theres usually a weathered mark on the distributor hold down where the washer went so its not hard to do.

jwtarbaj

Stock timing is 15 BTDC. They are saying advance to 20 BTDC.

DA-MAX

iTrader: (10)

hows that so??

sublunary

iTrader: (2)

i think he means if one is broken the others will be more stressed which will cause them to break sooner

jwtarbaj

Exactly!

sublunary

iTrader: (2)

nice car by the way, you got all the stuff i want if i ever get some money...

jwtarbaj

Thanks. It's taken me 3 years to get all that. I still want more. I intend to put on a UDP pulley, and Aadco RSB and maybe a FSB. When I finally replace the clutch (still original at 153K) I'll probably get the flywheel lightened too.

The list starts to get shorter then it grows again. I'm always car poor!

MAXMAN91

iTrader: (1)

how do i know if i had a exhaust stud broken..what does that do?
thanks for any help man

DA-MAX

iTrader: (10)

okay, I thought he was linking advanced timing to breaking the studs...

jwtarbaj

Most hear a ticking sound when the engine is cold and at idle. When it warms up the manifold seems to expand into place. The only way to be sure they are broken is to look at them. You will sae a hole for a stud with no nut on it. That means it's a goner. It's very common. Anyone with the improved studs ever have one break?

jwhite

I haven't seen any loss in gas mileage since my timing has been advanced. Actually, sinced I disabled the VTC's and advanced the timing (which I did all at the same time), I've seen a noticeable improvement in my mileage. My question is, provided the VTC's are operating as they are supposed to, how much do they advance the timing, and is it still ok to advance the timing myself? Or is the advanced timing just suggested to compensate for the power loss upon grounding the VTC's. In any case, I'm going to try the Toyota oil filter (90915-YZZA2) in addition to synthetic oil, in hopes that my VTC's will, by some miracle, be saved.

MAXMAN91

iTrader: (1)

where excatly are the exhaust studs at. what do they look like?

holla back

jwhite

In the rear bumper Just kidding, in the exhaust manifolds, of course.

jwtarbaj

They look like studs with nuts on the end. I don't know how else to describe them. You have a 91 so it's a VG. The ones on the rear manifold are about impossible to see but on the front look at where the exhaust "comes off the engine". This is the exhaust manifold. The studs with washers and nuts hold them on. Look for the nuts or a big oval or round shaped hole where they should be.