wastegate spring proportion advice.
01-03-2015, 10:06 PM
#1
Teching In
Thread Starter
iTrader: (9)
Join Date: Nov 2012
Posts: 28
Likes: 0
Received 0 Likes
on
0 Posts
wastegate spring proportion advice. Okay, the car is my 1997 camaro SS. The setup is 5.3/pt88, th400, qtp 9".
A few months ago I finished my build and took it to the dyno with an 11psi spring on a tial 44mm wastegate and I made 14psi. I have it running through a hallman pro MBC. Spools very fast and very hard on 14psi. I made 690rwhp on that trip but with my top speeds I found that I was blowing threw the converter and my 80# injectors were getting close to being maxed on e85. So since then I have upgraded to FIC 127lb injectors, installed a cheetah manual valve body and a pro torque stall spec'd for my setup as well as bought some more wastegate springs. On the dyno, I realized that the Hallman pro wasn't very accurate when turning it up because the original plan was to make at least 20 psi but after turning it 2 full revolutions and getting no more boost I turned it an additional 4 full turns and my tuner had to shut down early because he said it was going to spool to 30 psi or so. Wastegate springs just seem safer and 25 psi will be my absolute max that I want to run.
Now my question, since the 11psi spring built 14psi of boost is it safe to say that if I install the large and small blue spring which they claim is 20.3 will build 23-24psi? Do they seem to run proportional or not? Thanks for the help in advance.
A few months ago I finished my build and took it to the dyno with an 11psi spring on a tial 44mm wastegate and I made 14psi. I have it running through a hallman pro MBC. Spools very fast and very hard on 14psi. I made 690rwhp on that trip but with my top speeds I found that I was blowing threw the converter and my 80# injectors were getting close to being maxed on e85. So since then I have upgraded to FIC 127lb injectors, installed a cheetah manual valve body and a pro torque stall spec'd for my setup as well as bought some more wastegate springs. On the dyno, I realized that the Hallman pro wasn't very accurate when turning it up because the original plan was to make at least 20 psi but after turning it 2 full revolutions and getting no more boost I turned it an additional 4 full turns and my tuner had to shut down early because he said it was going to spool to 30 psi or so. Wastegate springs just seem safer and 25 psi will be my absolute max that I want to run.
Now my question, since the 11psi spring built 14psi of boost is it safe to say that if I install the large and small blue spring which they claim is 20.3 will build 23-24psi? Do they seem to run proportional or not? Thanks for the help in advance.
01-05-2015, 01:09 AM
#6
I have 2 38mm Tials.
The 8 psi springs gave just shy of 11 psi.
The 12 psi springs have me just shy of 15 psi.
I haven't gone further. And won't for awhile.
But when I do it will be 2 psi at a time. So that should be whatever combo is supposed to be 14.
I think you should sneak up on it!
The 8 psi springs gave just shy of 11 psi.
The 12 psi springs have me just shy of 15 psi.
I haven't gone further. And won't for awhile.
But when I do it will be 2 psi at a time. So that should be whatever combo is supposed to be 14.
I think you should sneak up on it!