White Smoke but Good Compression

[95AWD6Bolt]

So I have a 98 gsx with the following mods:

6 bolt bottom end
Topline forged pistons
1g big rods
2g head
16g turbo
cx racing tubular header
cx racing fmic
550 injectors

I have a little bit of white smoke coming out at idle and more coming out when i press the gas pedal. I researched on here then did a compression test and that came out between 150-155 across the board. I just checked the turbo for oil or shaft play and found a drop of oil on the filter side and it had no shaft play.

Does anyone else have any suggestions for me.

The only other thing that I can think of is that it needs a tune. It isnt tuned and im looking to buy an safc.

 

[tsi1991awd]

If its white, its water/coolant. Could be leaking from your TB into your I'M...FIAV seal?

 

[Carmenpzito]

Head Gasket is leaking betweek the cylinder wall and exhaust port. It won't effect your compression. Keep an eye on your radiator water. Hold your hand over your exhaust pipe & you'll probably feel moisture. Remember, white smoke is water, blue smoke is oil, black smoke is gas.

Good advice, but to be clear, moist exhaust isn't necessarily bad. When gas is burned ( in a stoichiometric mix) it breaks down to H2O and CO2. Thats why if you see a car idle for a while small drops of water come out the tail pipe. Your car isn't running a stoichiometric mix due to a bunch of variables, so you get H2O, CO2, and other gases to be further broken down in the catalytic converter via platinum and palladium.
Definitely keep watching those temps though, overheating is no fun

 

[Anarchology]

Topline forged pistons

Topline is an OEM replacement parts company from my experience. I don't think they make forged pistons for our cars. I have a set of Topline .040 over pistons in my car. They are better than stock, but definitely not forged, but rather normal cast pistons. Still, they are rated to put out 500hp with a proper setup.

 

[chico904]

Head Gasket is leaking betweek the cylinder wall and exhaust port. It won't effect your compression. .

Is this true? I always assumed that it would affect it.

 

[1gDSM4g63]

Head gasket leak will effect the compression. The compression will slowly leak. For this it is better to do a leak down test instead of a compression test. For the most part, if the head gasket is blown either coolant will be found in the oil pan or vice-a-verse.

 

[95AWD6Bolt]

ok so a little update.

I got new gas and it didnt help too much.

One thing that I did notice is that when you rev the engine, the smoke goes away. It seems to only smoke at idle.

(btw, i cannot drive the car bc it isnt insured yet.)

 

[crimsonGST]

I just changed the PCV valve and replaced the hose coming off of it on mine, and the smoke at idle went away Try that. It cost me 5.74 for the valve and the vacuum hose. Then clean your plugs or get new ones.

 

[jshuman]

If you are only seeing smoke at idle, then it is most likely your valve seals. However, the quickest way for you to determine the source of your problem is to perform a leakdown test as mentioned before.