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Joined: Sep 2001
Posts: 124
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Lets see if I can get that signature Working this time!! 
Tony Blatnica
99 Contour SE-Sport 2.5ATX
SVT Exhaust - Removed resonator
TH-Fix
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Joined: Jul 2000
Posts: 5,037
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Tony,
Those are all great questions and issues when adding a turbo to a car. I can assure you that these issues have been addressed, and the details are being ironed out. Just a few more days until she goes on the rack.
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Joined: May 2001
Posts: 972
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Originally posted by GoodwinToo: 1: Placement of the Turbo. The feed to the turbo would need to be somwhere off of the Y-pipe of the exhaust. Granted You could feed it off of the front bank, but you will run into exhaust flow problems due to a few reasons:1. a SERIOUS flow restriction that will vary with Trubo speed and wastegate setting and size, on one side of your bank of cylinders, and also the flow on that single bank will not be a vary consistent means to pump the exhaust turbine of the Turbo itself. 2: The previous problem will lead to this.. yeas you can put it in the area where the battery is located, but your equal length exhaust feeds to this locatin would be unreal, or if you feed it off of the y-pipe you are adding MAJOR exhaust flow restrictions, which are optimal in getting peak performance out of a turbo.
Ok 2nd thing that jumps up: Turbo sizing. Hmmmm if you goto one of my old Volvo Sites www.badbricks.com and goto the How to size a turbo link. Its kinda crude but it will give you the basics for figuring out what size turbo you need for your car. To get your Engines ER , goto Ray Hall's turbocharging site, he has a few good calculators based on fuel load , etc, that will allow you to get a good read on your engines ER rating for the flow of the turbo. The problem i see with the flow sizing of this turbo is how do you want to run it, street or strip? and f its strip,then finding a turbo that would be usable in the uper powerranges will cause UNDUE lag in the lower end of the RPM ranges. If its street the exhast opposite problem is there.. you will die off on the turbo as it reaches the upper ranges of its flow limits and then you will notice a drop in pressure of flow to the engine(ie undersizing a turbo). (jsut a side not, i honestly thing a roots/eaton style whipple charger would be the best for our C-Tours..but.. thats an impossiblity, financially and otherwise).
Ok 3rdly. Hmmmmm How do you purpose to handle the fueling requirements of the Turbo?I wont even go into the complex problems involved with that.
And 4th. How do you plan to intercool this charged air to keep detonation down in a car that has a VERY high compression ratio? Alky injection would seem to be the easiest..and if not alky then, intercoolers would be required and then managing to install while maintaining suitable intake ducting as to not impose further intake restriction would be high near impossible. Okies. Sorry on that note I think I'll shush up. 
so good luck and Once again.. Hi! Its good to be a part of the list!(I hope my signature is a good one.... I dont even remember what it is..LOL... oh yeah and I can't spell or type for dookie)ill be joining the exhaust pipes before they go into the turbo, thanks for the info on where to get turbo sizing ill be retarding ignition as the boost rises, as well as having a piggyback fuel managment unit and larger pump and injectors all said and done, my turbo will work and it will be tuned to run 12lbs or higher, unfortunately i am going to have to majorly alter my internals and fuel system, which wont be needed for chris's system , all in all his system will be cheaper and probably more stable, but i want the high boost
95 SE Champagne Mettalic
True Dual exhaust with X pipe and Redline mufflers
KKM Tru Rev intake
H&R Springs/KYB struts
Apex-i S-AFC
65mm Throttle Body
17" Ace Spades
4 Pt Racing Harness
Window Tint all around
New Engine @ 117k kilometers
G-Tech: 15.6 @ 91.5 MPH
"you officially kick ass"
quote from awed CEG'er after i chopped my hood and threw on scoops
RIP 98 SVT silverfrost *nov 4 2001*
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Joined: Mar 2001
Posts: 33
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cool article on the turbo probe (i used to have a 95 pgt).
interesting to see they run no intercooler, i think the old merkur xr4ti was "intercooler-less" as well. probably ok for low-boost application, also if the turbo is efficient at low boost (ie boost to heat is good).
had heard good things about the probe 2.5, its tougher than the duratec if i read/remember right...?
Have heard good things about the T-3 (or TO-3, whatever), some of the 1.8T Guys use it.
FYI, stock 1.8T turbo is a KKK KO3, Audi S4 uses two of them on a 2.7L. It is small and spools fast, but loses efficiency above 12 psi. stock 1.8T's run 6 psi (150 hp), or about 10-11 psi (170/180 hp). Aftermarket chips run 14.7 psi (boost spikes even higher), but only for limited rpm ranges. (That's why they glow red-hot!)
Stage 3 turbo upgrade kits use a bigger KKK KO4 (found in the Audi TT-225 w/ 2 intercoolers) or T3 to allow higher boost at upper rpm range (better efficiency than the KO3)
Seems a small turbo with low boost would do wonders for the 2.5, fill in some of the weak spots in the hp/torque curve, have it spool fast so that it doesn't feel too laggy. a kit that works within the limits of factory internals, too.
Anyway, good luck!
-Scott
2001 VW Passat 1.8T 5-man Leather/Lux/Monsoon Audio/CD Changer
16" VW Montreals
Neuspeed 25 mm Rear Stabilizer bar
Coming soon: SS Boost Controller
Former: 99 Contour SVT Red/Tan Stock
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Posts: 124
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Just been doing some thinking.. A T25 with a super 60 compressor wheel and ported housing, a full 360 degree thrust bearing, and a 5 degree clip on the exhaust wheel with a ported wastegate..... This would seem to be a nice turbo for the app.. and it also is possible to get a T25 with a ball bearing center section, of if the flow is choked off in the exhaust end, you could open it up to a T28 exhaust wheel and housing...(basically rebuilding a more modern Super 60 turbo then..) (oh .. this is prolly directed more as a general question for people who have been pondering the whole turbo thing) But has anyone here thought of a VNT25 with an upgraded compressor wheel?
Tony Blatnica
99 Contour SE-Sport 2.5ATX
SVT Exhaust - Removed resonator
TH-Fix
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Joined: Jul 2000
Posts: 5,037
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Posts: 5,037 |
We are using a VNT turbo with ball bearings right now.
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Joined: May 2001
Posts: 972
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Posts: 972 |
and i know nothing about turbo internals..doh!
95 SE Champagne Mettalic
True Dual exhaust with X pipe and Redline mufflers
KKM Tru Rev intake
H&R Springs/KYB struts
Apex-i S-AFC
65mm Throttle Body
17" Ace Spades
4 Pt Racing Harness
Window Tint all around
New Engine @ 117k kilometers
G-Tech: 15.6 @ 91.5 MPH
"you officially kick ass"
quote from awed CEG'er after i chopped my hood and threw on scoops
RIP 98 SVT silverfrost *nov 4 2001*
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Joined: Apr 2001
Posts: 724
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Posts: 724 |
*Ryan's head is spinning is circles from all the info crating at least 3 lb's of boost and brains are leaking from his waste gate I.E. His ears.*
I am glad I am doing a *simple* 3l swap
heh heh heh
Ryan
98 V6 Lots-o-mods SOLD
88 Daytona Shelby Z TII (The beast)
87 Daytona Shelby Z TII (Holy 20 psi of boost batman!)
Mods- 3" Downpipe, Hi-Flow cat, 3" mandrel bent exhaust with Dynomax Ultra flow. Manual boost controller, TurboXS blowoff, 5th injector, large canister wastegate, Nitrous Express go-fast-be-happy kit, ported exhaust manifold, ported intake manifold, upgraded motormounts, eibach springs, strut tower brace. Oh and 20 PSI to boot.. my oh my...
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Joined: Sep 2001
Posts: 15
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Posts: 15 |
Why don't you make this all real simple with parts that are available to you, 30.l conversion,drop the compersion,and put a vortech on it?
LETS SEE THE DYNO SHEET!
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