[LORDOBERON]

good afternoon all,

has anyone with an 20 and up used the speed engineering heat exchangers, their website says for years 17 - 19 Zl1 and 16- 19 CTS-V. i have a 21 Zl1 and want to use these. will they fit the 2020 and up

Thanks

[Stephen12ZL1]

same...they will fit

[Rapid_blue_zl1_22]

Yes, 17-23 are all the same for heat exchangers.

Please report back on the fitment and quality if you do order them though. I have been curious about them since they are so cheap. I just recently ordered the Weapon-X triple exchanger set with the black ice coating. I think a lot of people want to know if SE is a quality option.

[Smokin19]

Originally Posted by Rapid_blue_zl1_22

Yes, 17-23 are all the same for heat exchangers.

Please report back on the fitment and quality if you do order them though. I have been curious about them since they are so cheap. I just recently ordered the Weapon-X triple exchanger set with the black ice coating. I think a lot of people want to know if SE is a quality option.

I have the WeaponX triple exchanger set and am very happy with those.

[Rapid_blue_zl1_22]

Originally Posted by Smokin19

I have the WeaponX triple exchanger set and am very happy with those.

Thanks for the feedback! I considered the SE exchangers, but this is a brand new, nice car, I just didn't feel right about putting a cheaply made (unknown quality) parts on. Plus the black ice coating should help even more with heat soak, so I felt it was worth the extra money.

[BROCKgoFAST]

I think i'm going to try them out.

Remember sometimes a lot of companies buy parts and just re-brand them. I'm sure there are other companies using these with their name on it

[LORDOBERON]

I've looked at all the different companies that make them, and they all look exactly the same, except for the company Logo on some of them.

[BROCKgoFAST]

My only curiosity is if these are really needed. GM really did their homework with the ZL1 1LE on the cooling because of the problems they had with the Z06. I'm wondering if the thicker cooler will definitely take air away from the radiator and the AC condenser and curious if this will cause problems down the road. For us track rats having the supercharger cooler is great but making sure the radiator is keeping the engine cool is very important as well.

[GreenZLE]

I have them. They add capacity but be aware that the brackets for the small heat exchangers have to be modified a bit to fit due to the bigger tank size which also interferes with the rock guards in front of them. I had to shave about 1/4" off them where they butt up to tanks to get the rock guards to fit correctly. Not too bad to mod overall though.

At the time, I measured the exact amount of coolant I gained but of course I then lost track of the paper I wrote it down on. Between the 3, I think it was a bit over 1 gallon. 1 small cooler is for the engine FYI.

I believe I picked up about .5MPH in the 1/4 mile by just doing this. The car consistently trapped 124something before and now traps 125 consistently.

[Rapid_blue_zl1_22]

Originally Posted by BROCKgoFAST

My only curiosity is if these are really needed. GM really did their homework with the ZL1 1LE on the cooling because of the problems they had with the Z06. I'm wondering if the thicker cooler will definitely take air away from the radiator and the AC condenser and curious if this will cause problems down the road. For us track rats having the supercharger cooler is great but making sure the radiator is keeping the engine cool is very important as well.

This is why you upgrade all 3. The center and drivers side are for the supercharger coolant. The passenger side exchanger is an auxiliary radiator, so it should cancel out the loss of flow to the main radiator from the center exchanger. You could potentially have a performance reduction in your A/C system due to the condenser being partially blocked, but I doubt it would be enough to notice.

[Rapid_blue_zl1_22]

Originally Posted by LORDOBERON

I've looked at all the different companies that make them, and they all look exactly the same, except for the company Logo on some of them.

From all the ones I've looked at, while having similar shape, I have noticed that some have taller and/or thicker cores. The main concern for me though is the weld quality. WeaponX, as well as others like LMP, are made in house, hand tig welded, and pressure tested before they are shipped. The Speed Engineering are definitely made in China and are machine welded. This isn't necessarily a horrible thing, but it could be a higher potential for leaks. Like I said before, I was considering these, but I just decided to go with WPX for peace of mind. Plus I really like that they offer the black ice coating for better heat dissipation.

[Checkmate1]

No matter what headers you get - make sure you get them jet hot / ceramic coated for up to 2500'. LT4's run very hot through the manifolds. Do everything needful to keep the underhood temps down.

[ZL1...SON]

Originally Posted by Checkmate1

No matter what headers you get - make sure you get them jet hot / ceramic coated for up to 2500'. LT4's run very hot through the manifolds. Do everything needful to keep the underhood temps down.

I got my headers back from jet hot a month or so ago. They got the 2500°F coating and started bubbling and chipping after the first drive. There were no nicks or scrapes from installation where they started bubbling. I called to talk warranty and after looking at pictures and the bubbling, they admitted there might have been a prep issue. Of course, they offered to fix them, but most likely I won't be going through the hassle of removing them unless they get really bad, or when I drop the motor to do a cam. Needless to say, I am very disappointed in the coating and kind of kick myself for not doing the swain tech coating...

I got a little off the main topic there.

@smokin19 did you have to make any modifications for the Weapon X heat exchangers to fit?

[JSH]

Mine were upgraded but I don't know who's they are