Turbos running out of steam
02-01-2016, 12:48 PM
#21
Originally Posted by Forcefed86
As mentioned above, you really need to know what temps/pressures are pre IC to see how well it’s doing its job. If the pressure drop across the core is too high, the turbos could be working past their efficiency zone and pumping excessively hot air.
A2W setups are hard to beat. You really don’t need a heat exchanger with them IMO. For something like you’re doing I’d run a 5 gallon tank and only circulate the water when you’re in boost. It should work about as well as your A2A that way for street use, and you can toss the ice in at the track for serious cooling. The exchanger isn’t going to get the water below ambient anyway. If the water is sitting in your tank it should be around ambient.
You really don’t want the charge temps super low with alcohol fuels. There’s a lot more fuel in the CC and it requires additional heat to help vaporize. I don’t know exactly what inlet temps are ideal with E85, but having enough heat in the charge to help vaporize the fuel is actually beneficial. Running inlet temps down in the 100* range with alky cars can actually hurt performance since the fuel can’t vaporize properly.
What A2W cores are you looking at? I’m sure you could get away with a pretty small high flow core if you bought a good one. That should lower the cost quite a bit. If you could get the inlet temps around 140-150* that would be perfect IMO.
A2W setups are hard to beat. You really don’t need a heat exchanger with them IMO. For something like you’re doing I’d run a 5 gallon tank and only circulate the water when you’re in boost. It should work about as well as your A2A that way for street use, and you can toss the ice in at the track for serious cooling. The exchanger isn’t going to get the water below ambient anyway. If the water is sitting in your tank it should be around ambient.
You really don’t want the charge temps super low with alcohol fuels. There’s a lot more fuel in the CC and it requires additional heat to help vaporize. I don’t know exactly what inlet temps are ideal with E85, but having enough heat in the charge to help vaporize the fuel is actually beneficial. Running inlet temps down in the 100* range with alky cars can actually hurt performance since the fuel can’t vaporize properly.
What A2W cores are you looking at? I’m sure you could get away with a pretty small high flow core if you bought a good one. That should lower the cost quite a bit. If you could get the inlet temps around 140-150* that would be perfect IMO.
02-01-2016, 01:06 PM
#22
Yeah didn't think about the heat helping with vaporizing the abundance of fuel E85 brings into the CC.. I guess in retrospect 170 isn't THAT bad but I would happy to see it a little lower. I think I'm over the whole A2W thing at this point. I have some big races coming up and don't really have time to deal with all the BS.
May hook up some pressurized air and do a good leak check. Something sounds off, it's acting like its out of turbo. Maybe the 66/65's are just done on a 370 at the level you're running. 0-100psi pressure transducers are like $18 shipped. (grab a couple!) I'd wire one into the IC inlet area. Nice to have one on your cooling system too.
http://www.ebay.com/itm/271576977896?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Last edited by Forcefed86; 02-01-2016 at 04:28 PM.
02-01-2016, 03:38 PM
#23
9 Second Club
What was ambient temp ?
170degF sounds pretty damn high, but if ambient is already high, then relatively speaking it isnt so bad.
I wouldnt even consider racing if mine was over 130degF, but ambients here would be cooler.
Are your air filters pulling cold air ?
Presumably those air temps quoted are without any form of water or meth injection ?
170degF sounds pretty damn high, but if ambient is already high, then relatively speaking it isnt so bad.
I wouldnt even consider racing if mine was over 130degF, but ambients here would be cooler.
Are your air filters pulling cold air ?
Presumably those air temps quoted are without any form of water or meth injection ?
02-01-2016, 04:19 PM
#24
Originally Posted by stevieturbo
What was ambient temp ?
170degF sounds pretty damn high, but if ambient is already high, then relatively speaking it isnt so bad.
I wouldnt even consider racing if mine was over 130degF, but ambients here would be cooler.
Are your air filters pulling cold air ?
Presumably those air temps quoted are without any form of water or meth injection ?
170degF sounds pretty damn high, but if ambient is already high, then relatively speaking it isnt so bad.
I wouldnt even consider racing if mine was over 130degF, but ambients here would be cooler.
Are your air filters pulling cold air ?
Presumably those air temps quoted are without any form of water or meth injection ?
02-01-2016, 04:27 PM
#25
9 Second Club
It would definitely be interesting to see pre/post IC data, just to see how much work the cores are actually doing.
Would also do no harm if you could stick a sensor near the mouth of one of the turbos, just in case somehow it is pulling warm air from the rad. Airflow can sometimes do strange things
The only time my air temps would ever get to near 130degF or so, is after a lot of sitting about and lots of heat soak. When on the road or racing they're never hotter than that. Up to around 20psi I'd often run without meth so just the IC doing any cooling and it copes fine.
Over that I'd generally use meth so obviously temps will be cooler.
Would also do no harm if you could stick a sensor near the mouth of one of the turbos, just in case somehow it is pulling warm air from the rad. Airflow can sometimes do strange things
The only time my air temps would ever get to near 130degF or so, is after a lot of sitting about and lots of heat soak. When on the road or racing they're never hotter than that. Up to around 20psi I'd often run without meth so just the IC doing any cooling and it copes fine.
Over that I'd generally use meth so obviously temps will be cooler.
02-01-2016, 05:46 PM
#27
Originally Posted by Forcefed86
Do we know of any 66/65 precision turbo setups pushing this kind of power on a 370? I know wicked69's chevelle had 70/65 china copies and ran out of turbo pretty quickly on a 6.0.
02-01-2016, 07:12 PM
#31
Well.. Guess what. I just ran the serial numbers on the turbos and it looks like Jose@FI sent me 62/65's with a .68 AR when I asked for 66/65's with the .81
Luckily TN is going to fix his screw up for FREE! He asked me what size blades I want... Any suggestions?
Luckily TN is going to fix his screw up for FREE! He asked me what size blades I want... Any suggestions?
02-01-2016, 07:15 PM
#32
9 Second Club
Do the housings not state the A/R on them ?
I'd be measuring to make sure what you have, maybe the serial is listed as wrong or something ?
Sounds like a pretty big screw up really ?
I'd be measuring to make sure what you have, maybe the serial is listed as wrong or something ?
Sounds like a pretty big screw up really ?
02-01-2016, 07:44 PM
#33
Originally Posted by stevieturbo
Do the housings not state the A/R on them ?
I'd be measuring to make sure what you have, maybe the serial is listed as wrong or something ?
Sounds like a pretty big screw up really ?
I'd be measuring to make sure what you have, maybe the serial is listed as wrong or something ?
Sounds like a pretty big screw up really ?
Next question is what do I run now? TN will build whatever I want.
02-01-2016, 07:55 PM
#34
Not saying they don't, but I don't see any sort of compressor map or flow rating for the 66/65 turbonetics units. Just curious.
*Edit*
Whoops screen didn't re-load... Though it sounded like it was running out of turbo. Jose would be the man to ask, just tell him your goals.
*Edit*
Whoops screen didn't re-load... Though it sounded like it was running out of turbo. Jose would be the man to ask, just tell him your goals.
02-01-2016, 08:16 PM
#38
Originally Posted by Guard dog
6665 0.81 A/R T series should work great on a 370 with that lightweight chassis.
