Twin Charged, Compound boost with BW S475 Turbo and TVS 1900 Blower On A Truck
08-23-2009, 01:06 PM
#41
I've been driving this setup for a few month using my right foot to control the boost and logging data, and have NEVER had a IAT problem even with boosting to 15+ psi repeatedly. I just looked at a log from the other day and a run around 14-18psi, 0-100, IAT's when from 80* at the start to 108* at the end of the run and cooled right off after I got out of boost. I'd say they are in check 
08-24-2009, 12:11 AM
#43
It's the black thing in the pic. It is on the bottom of the blower AFTER the intercooler.
The lower tub
You can see it through this intake port
You can see the size differents between the above TVS1900 intercooler and this intercooler that was ion the old MP112's. The TVS intercooler core is 30% larger.
The lower tub
You can see it through this intake port
You can see the size differents between the above TVS1900 intercooler and this intercooler that was ion the old MP112's. The TVS intercooler core is 30% larger.
Last edited by kbracing96; 08-24-2009 at 12:18 AM.
08-24-2009, 12:41 AM
#44
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why not run the compressed air from the turbo to an a2a intercooler before going in to the blower. ?
i know the blower has it's own intercooler, but i think the having an a2a in there would be benefitial, and should lower down the air temps going in to the motor.
i know the blower has it's own intercooler, but i think the having an a2a in there would be benefitial, and should lower down the air temps going in to the motor.
08-24-2009, 01:06 AM
#45
With the MPT76's small .96 p-trim turbine, I felt it was chocking the blower, so I upgraded to this S475 with a HUGE 96mm turbine wheel and 1.36 a/r.
The plus side to the small turbine of the MPT76 was that I could control the boost with a singe 38mm WG, but EGT's were ski high, reaching 1700+ at the end of the 1/4.
Gonna go ahead and put the extra 38mm WG I have in the cross over and see it that lets me control the boost enough to take it to the track next weekend and gets some number just for a comparison, but not expecting much out of it.
This setup ends up with a VERY expensive intake manifold for just a little better bottom end and less top end.
I believe the S475 with a quick spool valve will give me about what I'm looking for for performance.
09-03-2009, 10:50 PM
#46
Ok, I got a second WG in the crossover (38mm), where the first one (50mm) originally was. Boost is now in control holding about 10 psi. Gauges are showing that with this 4 psi pulley, it's hitting the initial 4 psi, then the turbo spools up and carries it on up to 10psi which is the 38mm WG spring pressure, the 50mm gate has about a 6psi spring in it. Seem the blower is making about 5 psi and the turbo is making the other 5 PSI.
Having the OTHER problem now, can't get the boost controller to turn UP the boost, lol. Checked it out today and the controller is doing what it is supposed to be doing, so must be some kind of WG problem... Gonna put the 7psi pulley back on it and keep playing with it, I'd like to get it so it will hold a steady 15 psi. If I can do that I'll try and take it to the next track day which is a week from Sat unless some one buys the blower befor then 
.
It was nice to finally be about to make a nice long pull with it with out having to lift off the throttle toward the top of 2nd gear. Tune looks good at 10 psi, 11.5 afr, 20.5 timing (no KR) and IAT's in the 105-110* area with 85* ambient. Scangauge performance meter says, 13.4@105 on 10psi, but who knows just how accurate that is.
Got my quick spool valve for when I go back all turbo the other day, looks VERY nice!
Blower is officially for sale, http://www.performancetrucks.net/for...d.php?t=447444
Having the OTHER problem now, can't get the boost controller to turn UP the boost, lol. Checked it out today and the controller is doing what it is supposed to be doing, so must be some kind of WG problem...
Gonna put the 7psi pulley back on it and keep playing with it, I'd like to get it so it will hold a steady 15 psi. If I can do that I'll try and take it to the next track day which is a week from Sat unless some one buys the blower befor then . It was nice to finally be about to make a nice long pull with it with out having to lift off the throttle toward the top of 2nd gear. Tune looks good at 10 psi, 11.5 afr, 20.5 timing (no KR) and IAT's in the 105-110* area with 85* ambient. Scangauge performance meter says, 13.4@105 on 10psi, but who knows just how accurate that is.
Got my quick spool valve for when I go back all turbo the other day, looks VERY nice!
Blower is officially for sale, http://www.performancetrucks.net/for...d.php?t=447444
09-04-2009, 11:56 AM
#50
09-04-2009, 08:31 PM
#51
So I did a little playing this afternoon. Hooked up my second boost gauge to read exhaust back pressure before the turbo. Made some runs still with the 4psi pulley (3.6") on it, making about 10 psi of boost and back pressure would go up to about 8psi at 4000 and slowly creep up to 10 at 6000, then drop back down at the shifts. IAT's start around 105* where they normal are and would clime to about 125-130* buy about a 100mph. They recovered very fast though. Back down to 105* with 2-3 minutes. Check the water temp with my hand and was luke warm.
So then I went back home and swapped the 7psi (3.3") blower pulley back on it. Made the same 10 psi boost and peak back pressure, but had a lot more punch out of the hole. I can't seem to turn up the boost any with the boost controller, I think I need to put a stiffer spring back in the WG now. I have the softest spring that comes with the synapse WG kit in it (about a 4psi i think) and no pre-load spring. I made about 4 back to back pulls and by the last one, the IATS at the end of the last run were pushing about 154*. Drove the truck around for about 8-10 minutes and they where back down to the 105-108* range which is pretty much where they run all the time unless it's pretty cold outside. Ambient was in the upper 80's during all this time. Just a little R&D for ya guys.
So then I went back home and swapped the 7psi (3.3") blower pulley back on it. Made the same 10 psi boost and peak back pressure, but had a lot more punch out of the hole. I can't seem to turn up the boost any with the boost controller, I think I need to put a stiffer spring back in the WG now. I have the softest spring that comes with the synapse WG kit in it (about a 4psi i think) and no pre-load spring. I made about 4 back to back pulls and by the last one, the IATS at the end of the last run were pushing about 154*. Drove the truck around for about 8-10 minutes and they where back down to the 105-108* range which is pretty much where they run all the time unless it's pretty cold outside. Ambient was in the upper 80's during all this time. Just a little R&D for ya guys.
09-07-2009, 10:35 AM
#52
Took the truck to the track yesterday, nothing too great, but by the end of the day wasn't too disappointing
http://www.performancetrucks.net/for...d.php?t=447682
http://www.performancetrucks.net/for...d.php?t=447682
