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Overheating/Cooling It is amazing how critical the stock set up is to ensuring proper cooling of the drivetrain of the SC...Especially the SC400. When I first started examining this issue, I looked closely at every aspect that Lexus had engineered...and removing the stock fan and radiator would...

I know what you mean...I am hoping that the upper hood vents are sufficient to vent it out. We will see... That was the problem...Even the AAP Fans and shroud were sufficient for idling and very easy and slow driving...But, I was overheating above 40 mph...The shroud was a part of that...

John, this appears to be the case. I will know tomorrow as I plan to drive it down the interstate to determine for sure... Yes, the 14" Flex-A-Lites are still installed, with no shroud. Ryan

Success!!! Well guys, I finished up everything today... I completed fabbing up all the parts that I needed to modify...I measured, dremeled and fit the side panels in place, I mounted up the underside panels and added 2 more spacers so that the louvered front underside panel would clear...

Nice find David. You are always great at finding the "Great deal". Ryan

It's an airflow problem...It did not overheat with the front bumper cover off. It did when I installed the cover. I have to address that to solve it. Ryan

Thanks Guys...I have been talking about this somewhere in this thread, and I have been considering this as a potential issue for a few weeks now... Ryan

Well, I have been working on the overheating/cooling issue, and I have attatched pics of some of what I have done. First of all, it is amazing to me that when I commission a professional to do a job for me, how many issues so frequently come up with their work...They frequently do ot do the...

NO!!! It is not worth parting out. As Steve said, they can be had for cheap...mainly 2 reasons: They are exceptionally reliable, and can take quite a bit of abuse in stock form and keep on running. They are exceptionally expensive to modify and build, plus there are few off the shelf...

Considering and looking into an auxilliary smaller radiator...Have not decided if I want to build a custom primary, ir just build and add a small secondary. Good idea on the pusher fan...I may look into that. I understand your concerns on the exhaust port porting, but, it is so mild, I do...

I know about the Taurus fans, but not for this set up...Thanks for the link...Too thick for my set up. Glad to see you have it on the road...It should feel pretty good at 8 lbs. That set up is a little smaller, and the DP does not cross over each other like my new set up, so you have more...

Don't worry about it...You fit in perfectly with this crowd...:) I see now...:) I read that post...Quite funny...Oh the funny things we do sometimes...:D Ryan

John, Got it. WHo is blackuzz31? Ryan

I have a new Koyo All aluminum radiator...It is one of the best out there... Ryan

My overheating is while driving down the interstate at 50+ mph...Air should escape through those vents pretty well... Yep, I am reviewing that book as well...It has stopped collecting dust in the library... Steve, The air is not totally blocked, in fact, quite a bit gets around the...

John, I appreciate you commenting and offering some excellent suggestions.... After our conversation, I decided to start working up ideas for ducting air...I believe I want to be sure not to overdo it, as I believe at higher speeds this can add lift to the front end and if correct, that...

Thanks John. I do not believe the Zirgos flow anymore air than any other equivalent electric fan. They are more than likely all made by a few companies...especially the components that make them up, especially the electric motors. Although I may build a shroud, I am not sure I can build...

Thanks Steve. Yes, I suspected I would have to work on cooling...But I did not expect the AAP Fans to be such a loser here. They seem to work fine for N/A and Supercharged applications, but for turboed cars, they seem to not work well at all...too much extra heat to deal with. These things I...

Overheating challenges Mates, I have been driving my car, and it is fun...On low boost, and she has awakened once again, only better than Stage 1, except in 1 area... Overheating! This has been so much of an issue that I contemplated starting a new thread on it. The AAP Fan set up...

Thanks Justen...:D Ryan