Any Superchargers W/boost controllers?
09-03-2008, 02:01 PM
#21
SO the real question (seeing how you've done it before) what difference do you feel with your wastegate in place compared to a standard setup and are you having any problems with your setup?
09-03-2008, 04:39 PM
#22
TECH Fanatic
iTrader: (5)
Join Date: Apr 2005
Location: san marcos, TX
Posts: 1,014
Likes: 0
Received 0 Likes
on
0 Posts
No problems at all. Been on the car almost a year now. On low boost, it feels the same as high boost down low, then it just flat lines at 14psi but the car keeps pulling.. 
High boost and the waste gate never opens. Feels like its not even there..
High boost and the waste gate never opens. Feels like its not even there.. 
09-03-2008, 05:17 PM
#24
FormerVendor
Join Date: Mar 2006
Location: Hell AFB
Posts: 1,540
Likes: 0
Received 0 Likes
on
0 Posts
Id like to see some IAT data logs on low and high boost, in theory they should be about the same.
Id also like to figure a efficiency % on low vs high boost even though the impeller is at the same speed.
Someone needs to build a dang CVT transmission for these blowers lol.
Id also like to figure a efficiency % on low vs high boost even though the impeller is at the same speed.
Someone needs to build a dang CVT transmission for these blowers lol.
09-05-2008, 01:43 AM
#28
Id like to see some IAT data logs on low and high boost, in theory they should be about the same.
Id also like to figure a efficiency % on low vs high boost even though the impeller is at the same speed.
Someone needs to build a dang CVT transmission for these blowers lol.
Id also like to figure a efficiency % on low vs high boost even though the impeller is at the same speed.
Someone needs to build a dang CVT transmission for these blowers lol.
Chris.
09-05-2008, 02:43 AM
#29
12 Second Club
iTrader: (4)
Join Date: Aug 2003
Location: NorCal
Posts: 1,618
Likes: 0
Received 0 Likes
on
0 Posts
I remember questioning this when I first started my D1SC install long ago....
After being squashed by all the folks here I never proceeded with it.... wish I would have. I alway had a feeling that a wastegate on a SC car would work.
After being squashed by all the folks here I never proceeded with it.... wish I would have. I alway had a feeling that a wastegate on a SC car would work.
09-09-2008, 09:52 AM
#30
I've done this on my car..
I run an Greedy Profec B boost controller for waste gate control and a waste gate on my intake charge pipe with my supercharger with 2bar SD tune ..Waste gate is sprung for 6.5psi(on a turbo setup) but opens at 13psi on a supercharged setup. Pulled to 20psi(or so) for high boost, low boost bleeds air and keeps me at 14psi. Push of a button and I can switch from 14psi to 20psi...Makes 630rwhp on low boost and 720rwhp on high boost(17psi) at 5700rpm. Haven't ran it up to 6700rpm yet for the final dyno tune(new motor)...
I run an Greedy Profec B boost controller for waste gate control and a waste gate on my intake charge pipe with my supercharger with 2bar SD tune ..Waste gate is sprung for 6.5psi(on a turbo setup) but opens at 13psi on a supercharged setup. Pulled to 20psi(or so) for high boost, low boost bleeds air and keeps me at 14psi. Push of a button and I can switch from 14psi to 20psi...Makes 630rwhp on low boost and 720rwhp on high boost(17psi) at 5700rpm. Haven't ran it up to 6700rpm yet for the final dyno tune(new motor)...
So it sounds like a 6.5psi spring gives you 13psi.. Sounds like theres a 2:1 ratio there or close to it. So if I only want like 8 psi (when I'm on the stock shortblock) I'm pretty much SOL. I dont think they make 4lb springs.
09-09-2008, 11:12 AM
#31
That is pretty sweet that it works for you. Wonder what the difference in peek power would be if you pullied down to only run 14 psi of boost at max rpm vs using the waste gate to release the excess pressure.
09-09-2008, 01:36 PM
#32
If you pullied it to 14psi at max rpm you'de lose power everywhere in the power band.. I would image it would feel like someone took your engine and lopped 2 cylinders off it.
09-09-2008, 01:57 PM
#33
I know you'd lose TONS of power under the curve, but the peak figure... I'm curious what the losses are up top from spinning the blower that much faster. If you're not losing much to turning the blower faster this would definitely be a great way of building the bottom end of the powerband while keeping the motor from blowing up at the top end.
09-09-2008, 04:34 PM
#34
TECH Fanatic
iTrader: (5)
Join Date: Apr 2005
Location: san marcos, TX
Posts: 1,014
Likes: 0
Received 0 Likes
on
0 Posts
I will have a final dyno of both boost settings very soon..Just waiting on a semi-cool day..
The reason for this is that on a turbo system at say 5psi of boost their is approx. double, 10psi of back pressure in the exhaust manifold. And that is used to help push open the waste gate...So thats the difference..exhaust pressure vs intake pressure..
The reason for this is that on a turbo system at say 5psi of boost their is approx. double, 10psi of back pressure in the exhaust manifold. And that is used to help push open the waste gate...So thats the difference..exhaust pressure vs intake pressure..
09-09-2008, 05:24 PM
#36
FormerVendor
Join Date: Mar 2006
Location: Hell AFB
Posts: 1,540
Likes: 0
Received 0 Likes
on
0 Posts
09-09-2008, 07:08 PM
#39
Yeah I had talked about putting one on a friends car and just didn't ever buy the parts to play with it etc... I never saw any articles, but I knew it could be done. Even the factory ATI bypass valve bleeds off presure as a mater of fact they never 100% seal that is why they aren't the greatest for big power cars etc...
09-10-2008, 07:53 PM
#40
TECH Junkie
iTrader: (9)
Join Date: Apr 2005
Location: Miami, FL
Posts: 3,472
Likes: 0
Received 0 Likes
on
0 Posts
The narrow-mindedness of some...
The devotion of others...
Guess who looks dumb now?