I just wanted to see how many LSJs, if any, here are running just the option b without the dual pass end plate or any other cooling mods. For me, a dual pass isn't going to a worthwhile benefit since I don't drag or road race. On the other hand, the option b will at least constantly bleed the system and should remove any air pockets and possibly provide somewhat better IAT2 temps.

Is there anything different to take into consideration when installing the option b on a stock cooling system, such as extra steps?

Did you option b only folks see much of a reduction in IAT2s over the stock setup?

 

i have just the opt. b and a 2nd h/e

iat2s are decent, better after the opt.b

 

How much better?

My plan is option b only, on an otherwise 100% stock cooling system

 

im on a 2.8 and stock cooling. if the system is bled and flows fine, i cant really see the absolute need for opt b. much less any of the other cooling mods. i think it would be better to spend the money on a methanol kit and pull some timing out of it as well

and ^ i like the sig. i would have a bunch of graves if i had a sig like that lol

 

That's the thing, the stock fill neck is very inefficient a bleeding itself. I replaced my intercooler pump months, and I know my system is still not 100% bled of air. I still find myself having to add a little coolant here and there to the fill neck, and before anyone mentions it, no there are not any leaks hose or laminova wise. Its the nature of the stock fill neck

 

yeah, i mayve had to do that a bit when i replaced my pump, but i really cant remember. i havent touched it in at least 3 years that i know for sure. and i replaced the pump in 09. good luck though. i know plenty have had issues running opt b with stock quad pass, but im not sure if anyones been sucessful

 

Such as?

 

there were threads back in the day. only reason i know is because i wanted an opt b without dual pass and was searching on it. i didnt really research a whole lot, but here is one such thread

https://www.cobaltss.net/forums/2-0l...l-pass-182975/

search is your friend. google that is. there are a few other threads to the same effect if i remember correctly. i didnt read the whole thread as i get disinterested in cooling mods lol

 

I have already seen that thread before posting while searching. The OP there is also using an additional heat exchanger, whether it makes a difference or not, I dunno. I am more interested in hearing from people with option b only

 

I ran Opt. B w/o dual pass for 3 years.

I also ran it w/o a front mount.

Worked great.

Yeah if they installed it wrong....

05RLS2 PM me. I'll help you out. You are getting some bad info in here.

In short Opt. B is to provide a continuous bleed to the intercooling system. It is not dependent on the dual pass endplate to work correctly.

 

option B alone is a good mod. I have run that no problem good results. Good results, because, for example 100% of the stock aftercooling SC cars that show up here at out shop have an empty T bottle reservoir.

low coolant= poor aftercooling.

 

bam!

 

doesnt heatsoak as fast

cool down periods inbetween pulls were shorter

and its a better option for running more water/coolant

i have 2.8/60s

 

I run Opt B alone without dual pass. Works fine. Lower IAT2 than with stock neck.

 

bam what?

i didnt say it couldnt be done. i just said there are countless threads that say "iats higher after opt b install" or "opt b wont bleed". such threads are worth reading for someone looking at buying and installing opt b

 

That was intended towards Powells post.

Bam meaning he covered everything the OP needs to know.

The people that had issue with opt b later found they installed it wrong. Simple as that.

 

my bad. thats good to know though

 

Or a dead IC pump like, RB's thread.

 

That to.

 

FIFY

You are welcome!

 

I've always wanted to do this but haven't gotten around to it, so I just make sure there's fluid in the T-neck every time I have the hood open.

 

I always keep mine filled 1/4 above the fill line, and at times I can see little bubbles in the coolant in the neck when the car is shut off. That right there tells me that there is air in the system.


I have read on here where lots of people experience a constant stream of coolant coming from the bleeder on top of the heat exchanger to the bleeder end of the tank. This isn't correct, and I am guessing that this is becuase they are not using the correct orifice or do not have it installed correctly. Do any of you all experience this? If not where do you have the .040 orifice placed at in the system?

 

^ I don't experience that. When I first installed Opt b, it was the other way around. Fluid was going from the top line to the heat exchanger.

I have the fat part of the orifice in the line and the skinny part going into the fitting

 

Most of those plastic orifice things are too large b.040 thousandths

 

Nitrous jets work well