Any issues with using overflow tank supplied by FFR

[Autonut]

As not a large enough capacity? Seems others have had to replace with 1.5-2 quart capacity. Running a 351w in the Deep South, always hot. What’s you alls experience with this issue. Thanks for sharing your comments.
Jim

[gbranham]

I'm running a 427 SBF, and felt the kit-supplied overflow/recovery reservoir was too small. I upgraded to a 2qt Canton, and it's been great. With the fluid level fluctuation I've experienced in my Canton while running around in 90 degree weather, I can tell the kit-supplied piece would've been too small to handle the fluctuation.

Greg

216097216098216099

[lewma]

Greg, did that sight tube come pre-installed on your tank ? I need to add one to mine.

mark

[gbranham]

Greg, did that sight tube come pre-installed on your tank ? I need to add one to mine.

mark

It did, yep.

[Autonut]

Greg, thank you for your input and the pictures. I had a strong feeling that the capacity of the supplied canister wasn’t going to be adequate enough. Canton unit is a nice alternative. Thanks for sharing.
Jim

[egchewy79]

I'm using an overflow tank from amazon for like $50. I tried the 1L but had constant low fluid levels while cold in the tank. Upgraded to the 2L after a season of driving.
https://www.amazon.com/YIUIY-Universal-Overflow-Reservoir-Expansion/dp/B09FJPWCCV/ref=sxin_15_pa_sp_search_thematic_sspa?content-id=amzn1.sym.1faeb6eb-d2b9-4948-986d-7ba2a5388a58%3Aamzn1.sym.1faeb6eb-d2b9-4948-986d-7ba2a5388a58&crid=2Y89X238LA7UO&cv_ct_cx=overflow%2Btank&keywords=overflow%2Btank&pd_rd_i=B09FJPWCCV&pd_rd_r=09b53400-2c11-4912-b931-a5a8498a8830&pd_rd_w=flg1z&pd_rd_wg=zbS6V&pf_rd_p=1faeb6eb-d2b9-4948-986d-7ba2a5388a58&pf_rd_r=Z5G19VJWV31N3R4CBX4V&qid=1752148151&sbo=RZvfv%2F%2FHxDF%2BO5021pAnSA%3D%3D&sprefix=overflow%2Btank%2Caps%2C190&sr=1-5-543a432c-671c-4a3a-a15e-c8d9b2229043-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9zZWFyY2hfdGhlbWF0aWM&th=1

[JimLev]

I used the FFR supplied tank, no problems. 95-100+ºF all summer long.
LS3 6.2 liter engine.
216159

[Dgc333]

I too use the one supplied by FFR. Cold I have about an inch or two in the tank. When hot it is an inch or two below the overflow tube. In 2500.miles I have not had to add any.

[Autonut]

Thanks to all for your comments. I’m in So. Florida and the ambient temperature is always 90, day n night. So naturally, the car runs hotter than most. I may try the FFR unit. It’s an easy change out. Trying not to clutter the firewall all at the same time. Thanks again all.
Jim

[TxMike64]

Take the total volume of the cooling system, and multiply it by the expansion rate of the mix you're using - usually about 6%. Then make your tank bigger than that. To keep air out of the system you would always want some coolant in the tank when cold. When hot you want room for the expansion plus to keep it from puking all over the place.

Example if your total coolant volume is 13 quarts:
13 x .06 = .78qt ---- Your expansion tank needs to be at least 1qt


BTW - this calculation comes directly from Canton.

[Autonut]

Take the total volume of the cooling system, and multiply it by the expansion rate of the mix you're using - usually about 6%. Then make your tank bigger than that. To keep air out of the system you would always want some coolant in the tank when cold. When hot you want room for the expansion plus to keep it from puking all over the place.

Example if your total coolant volume is 13 quarts:
13 x .06 = .78qt ---- Your expansion tank needs to be at least 1qt


BTW - this calculation comes directly from Canton.

Thanks @TxMike64. Real good information there. Thanks for your comments and input. Real helpful.

Jim