Helper spring?
#2
Don't know; just went through my junk boxes untill I found one that seemed pretty strong. Connected it to the wastegate and then used a small piece of chain to a convenient bolt to adjust tension.
https://www.miataturbo.net/forums/vb...etimage&id=430
https://www.miataturbo.net/forums/vb...etimage&id=430
#5
Don't know; just went through my junk boxes untill I found one that seemed pretty strong. Connected it to the wastegate and then used a small piece of chain to a convenient bolt to adjust tension.
https://www.miataturbo.net/forums/vb...etimage&id=430
https://www.miataturbo.net/forums/vb...etimage&id=430
#8
Junior Member
Thread Starter
Join Date: Oct 2004
Location: Windsor, Canada
Posts: 191
Total Cats: -2
most definitive thread I've found on specs
http://forum.miata.net/vb/showpost.p...85&postcount=1
http://forum.miata.net/vb/showpost.p...85&postcount=1
#13
I tried several Home Depot springs. I didn't do any fancy alooominum fittings onto the wastegate actuator though. I just stretched the spring from one of those screws with the eye in it for adjustabiilty, attached to the actuator fitting, and looped it over the back. I had to smash the end of the spring a bit, but it works and it's a quick 5 minute job.
I eventually went with an 11.4(?) kg spring. With a combination of the adjustable screw, the adjustable wastegate actuator, and just stretching portions of the spring to lessen the tension, I was eventually able to dial right in on 11 psi. Now I just use the adjustability of the spring on one end and the actuator on the other as kind of a ghetto MBC to go between 7 and 11 psi.
I eventually went with an 11.4(?) kg spring. With a combination of the adjustable screw, the adjustable wastegate actuator, and just stretching portions of the spring to lessen the tension, I was eventually able to dial right in on 11 psi. Now I just use the adjustability of the spring on one end and the actuator on the other as kind of a ghetto MBC to go between 7 and 11 psi.
#15
http://www.cardomain.com/ride/590477/2
I haven't updated anything in awhile, but this pretty much shows my ghetto set-up and the dynoplots. I've played with the springs since then, and I think my set-up is holding boost better through the rpm band now. I just need to deal with my fueling issues and get a decent enough tune to get back onto the dyno for fine-tuning and power runs.
I haven't updated anything in awhile, but this pretty much shows my ghetto set-up and the dynoplots. I've played with the springs since then, and I think my set-up is holding boost better through the rpm band now. I just need to deal with my fueling issues and get a decent enough tune to get back onto the dyno for fine-tuning and power runs.
#16
Junior Member
iTrader: (2)
Join Date: Jul 2006
Location: Birmingham, Alabama
Posts: 209
Total Cats: 0
http://www.cardomain.com/ride/590477/2
I haven't updated anything in awhile, but this pretty much shows my ghetto set-up and the dynoplots. I've played with the springs since then, and I think my set-up is holding boost better through the rpm band now. I just need to deal with my fueling issues and get a decent enough tune to get back onto the dyno for fine-tuning and power runs.
I haven't updated anything in awhile, but this pretty much shows my ghetto set-up and the dynoplots. I've played with the springs since then, and I think my set-up is holding boost better through the rpm band now. I just need to deal with my fueling issues and get a decent enough tune to get back onto the dyno for fine-tuning and power runs.
#18
Np,
Yeah, I can't remember exactly what the part number for that spring is. If you need it, I can get it no problem.
No doubt about the clamp. These runs are almost 3 years old now. I've done a lot of work on my set-up since. I installed an O2 clamp last week. If I can work out my fueling and dial in my tuning for 10-11 psi again before the end of my vacation, I might take my car in for some dyno runs.
Yeah, I can't remember exactly what the part number for that spring is. If you need it, I can get it no problem.
No doubt about the clamp. These runs are almost 3 years old now. I've done a lot of work on my set-up since. I installed an O2 clamp last week. If I can work out my fueling and dial in my tuning for 10-11 psi again before the end of my vacation, I might take my car in for some dyno runs.
#19
Junior Member
Thread Starter
Join Date: Oct 2004
Location: Windsor, Canada
Posts: 191
Total Cats: -2
Np,
Yeah, I can't remember exactly what the part number for that spring is. If you need it, I can get it no problem.
No doubt about the clamp. These runs are almost 3 years old now. I've done a lot of work on my set-up since. I installed an O2 clamp last week. If I can work out my fueling and dial in my tuning for 10-11 psi again before the end of my vacation, I might take my car in for some dyno runs.
Yeah, I can't remember exactly what the part number for that spring is. If you need it, I can get it no problem.
No doubt about the clamp. These runs are almost 3 years old now. I've done a lot of work on my set-up since. I installed an O2 clamp last week. If I can work out my fueling and dial in my tuning for 10-11 psi again before the end of my vacation, I might take my car in for some dyno runs.