I have little idea of what I am looking at. This is the comp map of the TN 60-1.

I know the info I seek is in this map, my question how much boost is this turbo capable of supporting. Is an idea of 15 psi out of the question. Or at the boost levels would I be running into problems other than the compressor itself, such as dp size and heat being handled by the IC.

I was thinking about just doing a mild build this summer and running an agressive TN setup.

Thanks,
-Don

 

basically, it means, the car will fall on its face at 5500 rpms




i am KIDDING!!!!! not starting anything to you TN owners the torque on the kits is insane!!

 

Yes the turbo is capable of 15 PSI. 15 PSI (assuming a 14.7 ambient pressure ratio) is ~2.02 Pressure Ratio... Given the flow of the VQ and the power production you are looking for 15 PSI would land you in the 55 lb/min range at 2.02 pressure ratio..This is still on the efficiency island of that compressor map...

 

so we are assuming that the pressure altitude is 29.92" Hg and how often down that happen. So the car for example on a high pressure day say 30.44 "Hg the turbo would be dangerously close to out of efficiency.

 

No at 55 lb/min the compressor would be efficient up to a 2.5 pressure ratio..

 

ok I think I get it now... Mathmatics has never been my strong area.

So the turbo effectively speaking in 99% of situations would be efficient up to 15psi and at that pressure would be producing 55lb/min however that isnt the most efficient pressure level to flow because of the byproducts we arent talking about such as heat production.... etc.

Thanks MIA for trying to help me understand.

 

For the most part yes... We haven't taken into account the efficiency and flow specifications of the turbine, downpipe size, exhaust backpressure, Ve of the motor, and the other hundreds of factors that go into things. But generally speaking yes that compressor section should be plenty efficient at 15 PSI and 55 lb/min

 

the compressor on this turbo is fine,.......you will run into issue with the exhaust flow.........be it either the 2" y-pipe & uppipe, the T3 turbine housing, or the 2.5" downpipe......

There has been some debate over what is the most restrictive part. As far as I recall, no one has gone to bigger up-pipe or Y-pipe (might not be able to be done!!) whatever the clog in th pipe is, you will cross its path if you are pushing 15psi!!!!

 

It can and has been done...

 

it sounds like you have seen some Stage 2 prototypes.....

 

Actually search pwns you. D35010 (or whatever his name is) in Michigan already had his shop build him a larger ID downpipe

 

I thought your were referring to a larger up-pipe......that's gonne be the tough one. there isn't much room to increase the size, considering the way the y-pipe snakes around the steering rack, and the motor mounts, etc.

 

There's room to do that as well...