1KZ Water to Air Intercooler Question

[KZJ71 YotaFreak]

Hey all,

Still relatively new to this website, and trying to find my way around old posts re. the topic in question, however my search was unsuccessful. Apologies if this was already answered.

Just wondering if anyone has any past experiences fitting a water to air intercooler to a TLC 1kz (mechanical pump) engine? As per photo, there really isn't much room in the bay, however I'm planning on converting the dual battery setup to one battery in the bay and another somewhere in the rear if need be to make room for the intercooler goodies.

Are there any recommended kits available? Or perhaps, a similar setup from another engine that I can fit into the 1kz?

I'm eventually planning on increasing the boost and fuel slightly, or go down the variable turbo route, however I want to make sure that I keep heat levels as low as possible and remain reliable.

I really couldn't find much useful information online. Any input will be GREATLY appreciated!

 

[coldtaco]

Search on here. Been done multiple times on most engine options

 

[Waikato Willy]

honestly do the exhaust first, so restrictive from factory a bigger one will make so much difference to a stock 1KZ

 

[Gengis]

Looks like you have enough room to place the w/a cooler right where your current turbo to intake pipe is. you would not need a large unit for this engine. I think your biggest headache will be the w/a radiator placement and hookup.
G

 

[KZJ71 YotaFreak]

honestly do the exhaust first, so restrictive from factory a bigger one will make so much difference to a stock 1KZ

Definitely in the pipeline! Still haven't decided between a 2.75" or 3" diameter pipe

 

[KZJ71 YotaFreak]

Looks like you have enough room to place the w/a cooler right where your current turbo to intake pipe is. you would not need a large unit for this engine. I think your biggest headache will be the w/a radiator placement and hookup.
G

Want to stay as far away as possible from hot engine components such as the exhaust, however now that you mentioned it, it could be a possibility to keep the stock battery setup. Yeah the cooler will be a bit tricky to place... but will have to figure that one out too.

I'm guessing there aren't any kits available on the market huh

 

[Gengis]

Something like this from Frozen Boost. you could also wrap it if you are worried about heat and heat soak.

 

[KZJ71 YotaFreak]

Was on Frozen Boost's website earlier today. Reasonable prices!
Managed to speak to a local LC guru today and he will be guiding me accordingly. Thanks for your Input!! Appreciate it

 

[WILLTHEYOTA]

Hi, any updates on the water to air intercooler for the kzj 71? i'm on the same boat now, thanks!

 

[bj70bc]

this style is more efficient than a barrel style

 

[WILLTHEYOTA]

this style is more efficient than a barrel styl

this style is more efficient than a barrel style
View attachment 4146255

yep, it probably is, my problem is that i don't have much room to play with, barrel would have a pretty easy to package form factor

 

[Jern]

I think this and an exhaust for our engines are the best mods we can do.

I’ll be talking on this endeavor pretty soon with my rig, can I ask why you’ve gone W2A path and not A2A like many others have done? Cheers

 

[bj70bc]

these are very easy to package, and you can get the inlets and outlet wherever you want, a barrel is a waste of effort imho, ive done this to my 3b-t and the extra 10% effort it might take you to go this route should not be ignored.

 

[LDowney]

Good luck because your choices are not going to be crystal clear because your selection will have to balance fitment/integration and performance. Comparing the barrel intercooler to the cross-flow rectangular intercooler is somewhat apples-to-oranges. Below are the schematic diagrams for a cross flow and the barrel.

Right off you see that the cross flow is only offered in 2.5 in. dia. inlets/outlets, while the barrel is only available in 2.25 in. dia. This is indicating the cross flow is designed for a higher mass flow (i.e., larger engine or better heat transfer efficiency for the same engine) than the barrel.
[better performance with the cross flow]

But performance comes with a size delta. The nominal integration volume required for the cross flow is ~346 cu. in. , while the barrel is ~168 cu. in. This shows that the barrel requires almost half the volume of the cross flow.
[easier integration with the barrel]

You are the best judge of your priorities and needs for your Cruiser. I hope you continue to share updates on your choices and solutions.

 

[WILLTHEYOTA]

I think this and an exhaust for our engines are the best mods we can do.

I’ll be talking on this endeavor pretty soon with my rig, can I ask why you’ve gone W2A path and not A2A like many others have done? Cheers

i feel theres a better heat transfer in w2a and its easier for me to fit in an already crowded engine bay plus theres way less lag in w2a, it's a bit more complicated i guess tho

 

[WILLTHEYOTA]

Good luck because your choices are not going to be crystal clear because your selection will have to balance fitment/integration and performance. Comparing the barrel intercooler to the cross-flow rectangular intercooler is somewhat apples-to-oranges. Below are the schematic diagrams for a cross flow and the barrel.

Right off you see that the cross flow is only offered in 2.5 in. dia. inlets/outlets, while the barrel is only available in 2.25 in. dia. This is indicating the cross flow is designed for a higher mass flow (i.e., larger engine or better heat transfer efficiency for the same engine) than the barrel.
[better performance with the cross flow]

But performance comes with a size delta. The nominal integration volume required for the cross flow is ~346 cu. in. , while the barrel is ~168 cu. in. This shows that the barrel requires almost half the volume of the cross flow.
[easier integration with the barrel]

View attachment 4147900
View attachment 4147901
You are the best judge of your priorities and needs for your Cruiser. I hope you continue to share updates on your choices and solutions.

to be honest i already bought a cross flow rectangular intercooler i'm having trouble fitting it in, i'm now going to swap rocker cover to a later one for an intercooled 1kzte hoping i'd free up some space between engine, bonnet and firewall. if that doesnt work i'll either have to go custom or barrel, i'm now running 17.4 psi, td04 turbo and can cruise on the highway at 365° c post turbo egt