LS2 water header tank

[nike 5]

Hi,
what capacity water header tank do you guys use for an LS2 engine - how large do I need.
Thanks
Kevin

[Steve_D]

I would suggest the standard Factory swirl pot and header tank.
Not for any 'keep it standard' type reason more that they are both a perfect size and shape for both the job and fitting the available space.
They both need to be high up on the bulkhead so being slim and tall means they work well.

Steve

[nike 5]

Steve,
Thanks for getting back to me so quick on this, and you do make a good point (if it aint broke, don't fix it).
The other advantage is that it is transparent, so I will be able to see fluid level.
Kevin

[Steve_D]

The Factory tanks are ali so no visible guide.
When the system is cold the swirl should be full and the header nearly empty.

Steve

[nike 5]

Steve
Have re-read your reply. Did not realise LS engines had a water swirl pot.
Intention was to run coolant hose from (top of engine) water thermostat - directly to radiator.

So on a LS(2) engine, the flow goes from from water thermostat - to swirl pot - to top of radiator.

With header tank linked to radiator or swirl pot?

[Steve_D]

Top of engine to top of swirl.
Bottom of swirl to rad.
Lower spigot at top of swirl takes bleed from top of rad plus steam vents from cylinder heads.
Upper spigot at top of swirl goes to bottom of header tank.

Swirl has a blanking cap ie not spring loaded.
Header tank has spring loaded pressure cap 13psi.

Steve