Aluminum Radiators: Koyo vs. Mishimoto vs. Blackworks
okay so I've been researching radiators.... i really wanted the Mishimoto radiator/fan shroud combo but heard that mishimoto has fitment issues.... so I've been looking into KOYO radiators.... heres what I've found....
KOYO ALUMINUM RACING RADIATOR INFINITI G35 03-07 COUPE 03-06 SEDAN VQ35DE V2588
it says "Fits Manual Transmissions Only (for Automatic Transmission this will fit but External Transmission cooler needed)."
1) what does that mean??^^
2) does KOYO make radiators for A/T?
3) dont we have OEM transmission coolers already?
4) what kind of fan shroud can i get?
5) how much modification needs to be don't if KOYO does not make one for 5 A/T?
6) does this mean i have to buy a transmission cooler as well??
HELP!!
KOYO ALUMINUM RACING RADIATOR INFINITI G35 03-07 COUPE 03-06 SEDAN VQ35DE V2588
it says "Fits Manual Transmissions Only (for Automatic Transmission this will fit but External Transmission cooler needed)."
1) what does that mean??^^
2) does KOYO make radiators for A/T?
3) dont we have OEM transmission coolers already?
4) what kind of fan shroud can i get?
5) how much modification needs to be don't if KOYO does not make one for 5 A/T?
6) does this mean i have to buy a transmission cooler as well??
HELP!!
http://www.koyorad.com/search.asp
The part number for the 6MT radiator is V2588.
The AT radiator has transmission cooler lines that run through the radiator. If you buy a radiator design for a MT, it will not have the fittings for this.
THANK YOU SO MUCH!!! So do i still need transmission cooler if i get this one made for the 5AT? just clarifying...
is this the polished one?
and what fan shrouds am i able to use?
is this the polished one?
and what fan shrouds am i able to use?
You will not need an external transmission cooler since the AT cooler lines hook up to the radiator. From my understanding (by reading here on Driver) is that the guys that get external transmission coolers is because they need to keep the temps down especially if they are boosted or tracking the car. I imagine even an aftermarket radiator can only do so much.
It's the OEM replacement.
It's the OEM replacement.
Last edited by Lone Wolf; Jan 21, 2013 at 05:41 PM.
they're like $180??
You will not need an external transmission cooler since the AT cooler lines hook up to the radiator. From my understanding (by reading here on Driver) is that the guys that get external transmission coolers is because they need to keep the temps down especially if they are boosted or tracking the car. I imagine even an aftermarket radiator can do so much.
Yep, this is the regular Koyo (not "racing" model) so it's not all aluminum. The top and bottom are plastic like the OEM radiator. I would get an all aluminum if I were you...
You should consider getting a transmission cooler - the stock cooler is not sufficient for many applications IMO.
The number 1 cause for failure in automatic transmissions is HEAT. Our stock cooler regulates the trans temp fluid w/ the engine coolant. The coolest it ever will get is the temp inside the radiator.
I have been running a B&M cooler in series w/ the oem cooler inside the trans for a while. In my opinion all stock auto trans need better coolers 90% of the time. This of course is dependent on driving style and climate as well, but the in-radiator coolers do not help much.
The number 1 cause for failure in automatic transmissions is HEAT. Our stock cooler regulates the trans temp fluid w/ the engine coolant. The coolest it ever will get is the temp inside the radiator.
I have been running a B&M cooler in series w/ the oem cooler inside the trans for a while. In my opinion all stock auto trans need better coolers 90% of the time. This of course is dependent on driving style and climate as well, but the in-radiator coolers do not help much.
honestly I'm not sure why everyone says you have to get a trans cooler. I'm boosted 5AT making around 400whp and I've been monitoring my trans temps with a gauge and it never gets over 200 F. Now, I also have the nismo thermostat, and I run distilled and water wetter instead of normal 50/50 AF.
I live in Texas and temps here are usually over 100 consistently during the summer. One thing I do recommend, boosted or not, is an oil cooler. When I was NA I put in a gauge to monitor temps and they were consistently over 240F. I have since installed a 19 row cooler with -10 AN lines and temps now don't reach over 210F. 240F NA no Oil Cooler to 210F Boosted with the oil cooler. I damn near doubled my power and my temps still dropped.
I live in Texas and temps here are usually over 100 consistently during the summer. One thing I do recommend, boosted or not, is an oil cooler. When I was NA I put in a gauge to monitor temps and they were consistently over 240F. I have since installed a 19 row cooler with -10 AN lines and temps now don't reach over 210F. 240F NA no Oil Cooler to 210F Boosted with the oil cooler. I damn near doubled my power and my temps still dropped.
Trans cooler will be my next investment since I went into limp mode this last summer due to the fluid getting hot. Like the polished B&M unit with the largest capacity. When I replace my radiator I sure don't want one with the plastic side tanks like OE....why bother?
Gary
Gary