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Author
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Topic: Wastegate/bleed-off valve with D1SC
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RED@7kVERT *8850GT*
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Member # 5909
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posted
 
 
i want to do this!
pulley my D1 with a 10% overdriving lower and a 3.5 upper for 62k RPM @ 7200 RPM, and then regulate it @ about 15-16lbs with either a wastegate or this....
http://www.928motorsports.com/parts/boostlimitervalve.php
i like this "BLV" idea better than the wastgate option, as im not looking for the on the fly adjustability of the wastegate/boost controller combo. but rather the much more agressive boost curves.
my main concern with this is HEAT. i have the Procharger 3 core "race" intercooler and was also thinking about meth inj. with this as well.
whatchya think??? sounds like a solid idea to making a centri. blower MUCH more fun on the street....
[ March 22, 2009, 06:18 PM: Message edited by: RED@7kVERT *8850GT* ]
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02 Z06-11.0 @ 132 1.9 60'
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Sold:05 CTS-V-13.1@114
Sold:01 Cobra Vert-12.0@119
Posts: 2432 | From: -916- | Registered: Aug 2005
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StreakMatt
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Member # 6257
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posted
I'm gonna be doing this also........On my next motor ![[Wink]](wink.gif)
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Custom Blue '88 GT: Garage Built= MM&FF January 2012 Cover and Feature. Tuned by Bob Kurgan
Black '03 Cobra: 2.9 Whipple Tuned by Bob Kurgan
Posts: 1198 | From: Sacramento | Registered: Nov 2005
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RED@7kVERT *8850GT*
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Member # 5909
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posted
F it....
im buyin and and doing it. boost will hit so much harder and lower in the RPM's and youll still have the top end of the centri blower. pretty much as close as you can get to a turbo like boost/power curves without being turbo...
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02 Z06-11.0 @ 132 1.9 60'
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Sold:05 CTS-V-13.1@114
Sold:01 Cobra Vert-12.0@119
Posts: 2432 | From: -916- | Registered: Aug 2005
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StreakMatt
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Member # 6257
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posted
quote:
Originally posted by RED@7kVERT *8850GT*:
F it....
im buyin and and doing it. boost will hit so much harder and lower in the RPM's and youll still have the top end of the centri blower. pretty much as close as you can get to a turbo like boost/power curves without being turbo...
Exactly. I did a little research awhile back and I wanted to do it on the next combo.
[ March 23, 2009, 03:33 AM: Message edited by: streakmatt ]
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Custom Blue '88 GT: Garage Built= MM&FF January 2012 Cover and Feature. Tuned by Bob Kurgan
Black '03 Cobra: 2.9 Whipple Tuned by Bob Kurgan
Posts: 1198 | From: Sacramento | Registered: Nov 2005
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RED@7kVERT *8850GT*
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Member # 5909
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posted
i hope 93Pony gives a 3 paragraph response...lol
i want sumthing to read!!!
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02 Z06-11.0 @ 132 1.9 60'
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Sold:05 CTS-V-13.1@114
Sold:01 Cobra Vert-12.0@119
Posts: 2432 | From: -916- | Registered: Aug 2005
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JohnB
Tech Moderator
Member # 969
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posted
Neat idea, but there are two potential issues...
1. You have to have a big setup to benefit from this, as over-driving the unit will won't work well with a small blower...it will only fall on it's face faster.
2. Heat will be a MAJOR issue. Couple this with the loss of volumetric efficiency, it will only make less boost.
If you want low-rpm boost...get a roots-style!
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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jayl
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Member # 185
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posted
seen some pretty cool results on some YSi cars. ( even locally ) Torque is flat like a roots and makes the power up top! Very basic and actually seems to work well.
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Facebook.com/TeamTemporary
8.5's TTFBitch!
Posts: 3821 | From: Hayward | Registered: Mar 2001
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RED@7kVERT *8850GT*
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Member # 5909
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posted
well thats why im not posting this with my S-trim...
ive got a D1. i think i can do it. just pulley it with the upper/lower combo to max impeller speed at your max RPM. i dont think a D1 should have a problem doing this. 62k RPM impeller speed and all i want is 15-16lbs in the manifold....on my little 281, well 284...lol
im 8 ribbed as well. so i dont think belt slip will be an issue with a ultra grip 3.5 upper...
johnB, roots/TS's are fun! im selling my eaton swap becasue i thot i was limiting myself on top end power. 4V's are high revving motors. whats your whipple stop at? 6,500?? right? i wanted to take this thing to 7,200-500. cant do that with a TS.
and turbo? thats next season. Hellion T76
[ March 23, 2009, 07:33 PM: Message edited by: RED@7kVERT *8850GT* ]
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02 Z06-11.0 @ 132 1.9 60'
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Sold:05 CTS-V-13.1@114
Sold:01 Cobra Vert-12.0@119
Posts: 2432 | From: -916- | Registered: Aug 2005
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essasin
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Member # 4741
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posted
I actually tried this recently on a d1sc that makes about 15-16 psi with a 3 core intercooler no meth. The heat was ridiculous coming from this. Coupled with the extra heat from the blower the engine temps where too high and out weighted any benefits this blv may have had. Maybe if I ran meth kit it might work.
Posts: 2402 | Registered: Jul 2004
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RED@7kVERT *8850GT*
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Member # 5909
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posted
i dont see the heat being any different if the motor were actually to be consuming the boost rather than it being bled off...
if the blowers within its max impeller speed. i dont see an issue at all.
![[Confused]](confused.gif)
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02 Z06-11.0 @ 132 1.9 60'
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Sold:05 CTS-V-13.1@114
Sold:01 Cobra Vert-12.0@119
Posts: 2432 | From: -916- | Registered: Aug 2005
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essasin
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Member # 4741
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posted
quote:
Originally posted by RED@7kVERT *8850GT*:
i dont see the heat being any different if the motor were actually to be consuming the boost rather than it being bled off...
if the blowers within its max impeller speed. i dont see an issue at all.
If I can find my file that was logged during the dyno it'll prob be better. I actually made 2 lb less boost with one of these on and it has something to do with heat.
Posts: 2402 | Registered: Jul 2004
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JohnB
Tech Moderator
Member # 969
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posted
quote:
Originally posted by RED@7kVERT *8850GT*:
johnB, roots/TS's are fun! im selling my eaton swap becasue i thot i was limiting myself on top end power. 4V's are high revving motors. whats your whipple stop at? 6,500?? right? i wanted to take this thing to 7,200-500. cant do that with a TS.
Totally understand the 4v's like to rev...but the benefits after 6500 are nill with *most* combos. It just won't make power, period. If it takes 7500+ to make power, you may want to re-think the setup. Just my opinion...give it a shot though! Let us know how it works for ya.
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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93PONY
Mr. Valve Events
Member # 60
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posted
At AED we're working on a much simpler/compact setup.
Maff changes in a draw-thru setup can give fits with tuning changes when a waste gate and by-pass valve are used.
We're working on converting Drew's Wife's GT from draw-thru to Blow thru & running a (large) Blow off valve. The Greddy Type 'R' to be exact. With a manual turbo boost controller and this highly adjustable valve, we'll be able to dial in drivability with the valve (closed most likely), adjust it to open at say 18-20" of vacuum for when the TB slams shut during shifts, then use the boost controller to let boost in on to the opposite side of the valve under WOT which will open the BOV & regulate boost. (a Hallman boost controller with Ceramic ball is ideal) In this case at a Safe level for Pump gas. Since the maff is downstream, it *should not* see any irregularities in airflow & provide a consistant easy-driving tune.
For Race gas time, simply un-plug the boost controller & load in the 'race' tune. No pulley or belt changes.
Sure, you could adjust the boost controller, but I like to keep things as simple as possible. It's highly un-likely you'll be able to set the boost controller on the EXACT same boost level every time. Simply un-plugging the damn thing eliminates this human error.
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www.advancedenginedevelopment.com
SCT dealer
Dynotuning
(916)715-7569
Posts: 4265 | From: Fair Oaks, CA | Registered: Nov 2000
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