The addition of a CO2 blast helps spooling and nitrous is the fix for sure to get a lazy motor onto boost quickly. But it is frowned on in drag racing, especially nitrous in a class that is limited to one power adder.
Kepp the suggestions coming they are all great.
Thanks,Stein
Metalguy, I want to redesign the wheel slightly to attempt to eliminate some of the excess clearances in the turbo. If the thing touches down anywhere im dead and I realize that . Also I think I may find that the blade design I want to run with may help spooling but may also cause a ton of...
I want to redesign the turbo impeller wheels in my turbocharger to help the spooling issue that the large turbo has.
I was wondering what material the impeller wheels are made from.
Thanks in advance,Stein
Well guys you were all an incredible help. The guy who heat treats for me is really good and he had made several statements like we have discussed here but was all for any possible advice as well , he didn't want to ruin any parts.
We ended up doing a stress relief , 1575F for 1 hour after warm...
Well i have some information, we tested the piece a little more thoroughly today and considered your thoughts of decarb. I think your dead on with that. With the surface being approx 46Rc I ground down about .010" and rechecked and it was 51Rc. The ovens that we used were no vacuum .The...
We were going to try another piece on monday and that was the method we were going to try as well with leaving out the normalize step. Would you still use the double temper method as mentioned by the manufacturer or just go with a 4 hour temper. We tempered at 575F would that be ok or would you...
The shaft is 1" diameter by approx 14" long and the oil temperature is unknown. Also we did not record the Rc after quench ,that was a mistake. I will try again on moday with another sample part and record the Rc after all the steps . If you can think of any other information that will...
TVP thanks for the link ,checked it out and the treat is the exact same as what i have done except for the 2+2 hour double temper ,I wonder if that would have made that much difference?
Thanks again ,Stein
I have made some shafts from 300M material. Before heat treating I contacted the mill and asked them for the best method of heat treat,we went over the cert papers etc and they said renormalize 1700F for 1 hour followed by air cool. Then 1600F for 1 hour ,oil quench and temper 575F for 4-6 hours...
For the purpose of making torsional shafts which will see only a twisting action. The maraging steels are nice to use because they are low temp heat treat with air cooling where as the 300M requires quenching to harden, which in turn adds a straightening step in the process before finish...
