fran_drivertsi
15+ Year Contributor
- 157
- 1
- Sep 23, 2007
-
StPaul,
Minnesota
what did you see in terms of airflow from that HTA68? Did you get close to promised 47lbs/min?
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You did pick up 5mph in ET, so I suppose it does flow more air. I was just curious to see the actual numbers though.

He also added 15% more engine displacement, added an intercooler, changed piping, and went with a very different fueling system and method. I'm sure the larger compressor wheel made some of that difference, but you can't just discount all the other changes and say the HTA wheel is 5mph better.
He also added 15% more engine displacement, added an intercooler, changed piping, and went with a very different fueling system and method. I'm sure the larger compressor wheel made some of that difference, but you can't just discount all the other changes and say the HTA wheel is 5mph better.

I know the HTA is not worth a true 5mph. The car has really only picked up a constant 2 tenths so far. On the Dyno the car is only up 15-20hp more but I have not been able to max it out yet.
Most 16g cars are under 25psi by 7k and this one is holding 28psi to revlimt at 8k. I am shifting the car at 7k.
The car is on a Map sensor and I would never trust DSM link Air flow # way to many variables for it to ever be right.
I dont see how I can get you any real air flow # from a map sensor. There is no way for me to get those # with out a air flow meter.
Right now the boost control is not cranked up at all compered to the EVOIII 16g car.
On a 40psi spike you may be able to get it to hold the boost higher but it will only spike like that on a low gear pull so once you are going through the gears it will be less at 7k then if you do a low roll with a huge spike.

this one is holding 28psi to revlimt at 8k. I am shifting the car at 7k.
I have never done a external WG 16g. I could see ware you could cause failure by keeping it cranked up that much. All I have ever really seen from cranked up 16g is way more TQ in the under 5k area. It seems if they are moded to hold much more then 25psi past 6k there is not much power gains for the extra stress on the turbo.
I just tuned a stock motor, FP2, E85,supporting mods 1g yesterday on a a EVOIII and I was able to get 402whp and 434TQ with a 33psi spike tapering to 23psi by 7k.
My motor that is in there is just STD Wisco pistons so its 9:0 comp.