Hi all, just chasing a little info for comparison. I have an FJ20 which makes just over 500hp atw on 24psi with a 20yr old GT3040.
there arent many people around with FJs anymore so info on turbo combos is hard to find. Hoping to use some info here for comparison.

Problem I've got.. excess intake air heat. End of a run I'm seeing about 70 deg C. Thinking the compressor is making excess heat so I'm looking at different turbo options. Primarily a Garrett G35-1050.

Running a link Fury ecu loaded with sensors and individual EGTs. Everything else is normal, just intake air temp is high.

Any thoughts and results on 4Gs would be good to know.

Thanks.

 

I'm assuming you mean MAT, after the intercooler?

Are you measuring temp before and after the intercooler? That will help you determine how efficient your intercooler is.

Sounds to me like you need an intercooler upgrade. 24psi shouldn't be stressing that turbo much.

 

Yes sorry.. MAT..

I'm not measuring temp before the intercooler as yet but I was already planning on adding an air sensor there to see just where the temp is coming from.

I have Had a few people suggest intercooler funnily enough.
i actually swapped the 15yr old 450mm wide China core with a 600mm Mishimoto core and it made very little difference at higher boost. It made a decent chunk more power on lower boost settings, but above 22psi it was heatsoaking.

The part im not convinced about is that there are loads of people running cheap chinese coolers on big power cars and high air temps aren't a being seen which is why i feel it could be compressor... hard to say

 

I had a boost leak one time that was so bad (clamp failed in fender) that the turbo was throwing out air bake a cookie levels of heat on the dyno. Just to make sure you may want to do a boost leak test.

 

Good point but I've done that too.. no leaks. Great thought though

 

158 is pretty warm, but nothing that crazy. That turbo is a very old design, and one with much too small of a turbine for it's compressor size. I bet you're just pushing it too hard. Those old compressor maps are not very tall. Why are you considering jumping to a turbo that flows more than double what your current one does? A G30-660 will spool faster and make more power than the dinosaur you have on there, and do it more efficiently. It will absolutely transform the car.

Also, make sure your air intake can pull fresh, ambient temp air from somewhere. This makes a much bigger difference than most people will tell you.

You do realize that a Mishimoto is a cheap chinese intercooler? While you could switch to a more efficient core with less pressure drop, I don't think that's the real issue. I think the turbo is just out of steam.

 

@RWD4G63 I'm actually glad you said that, it's been my feeling all along. I wasn't set on the 35-1050, just seemed to have headroom for future tuning but realistically, if it made another 100hp atw.. i wouldn't tune further, I would be stoked with another 50hp really.

I did some research and many threads have said the old gt3040 isnt the best turbo. I don't know much about compressor maps just yet but i also didnt realise the 35-1050 flowed double. You're right, I don't need that much flow.

Air intake is on the list, I'm going to make an airbox and pull air from outside of the engine bay. I'm currently seeing 80 deg Celsius during a dyno run with the temp probe mounted on the filter. Certainly not helping my intake temps.

Yep, i Know the mishimoto core is cheap as well, but we had a 3 months wait for a decent cooler here at the moment and a massive price tag so i went with a bandaid fix that hasn't paid off. However, as you said, I believe its the turbo. I've got plenty of mates running around with 600hp on chinese cores no worries.

Thanks for the advice everyone. I'll more forward based on the feedback here!