Right, turbo INLET. There's no forced induction in that portion of the intake tract. It's ALWAYS under vacuum.KingpinCEO wrote:i disagree with luke G.
i think the stacks help.
like the bell mouth turbo inlets.
in the plenum.... i dunno maybe. any little bit helps.
this calls for a race between luke G, and colin.
Volvo head...on the car!
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3" mandrel bent exhaust, Ported/Polished head, 1.89/1.57 valves, Gutted uppper/Knife edge lower intake, T3/T4, LA3, Big VAM, Cold air intake, 40bob header, Gillis valve, Forge BOV, Mustang SVO T5, Conquest intercooler, 20psi.
Try again.....you should try and stay away from blanket statements like that.MerkXRTurbo wrote:Velocity stacks do nothing on a turbo.
I wonder what Harry King would have to say about that?
They do help inside a pressurized intake plenum. The air is not rushing in directly to each cylinder, it is filling a plenum and regardless of whether it's being pushed or pulled, you want a smooth transition out of the plenum into the intake tract. The inlet bells allow for that.
Colin, you are right to use them, esp in an intake with a bit of a plenum.
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All in all, it must be said that you're doing a terrific job to ensure that what you're building not only works, but is reliable. Extra material in weak spots is a great idea, and your oil passage is also. I think another way to do it there might be with a bit of actual piping rather than a hose, if one were not going with the solution you've taken.
There is one other factor worth addressing here, which is what effect masses of metal, or lack thereof, might do to the cooling of the head, as well as with the possible formation of hot spots, not adequately cooled in comparison to the rest of the head. I guess this is a sort of terra incognita for a DIY'er without the luxury of the factory's resources.
I hope for the best possible results and look forward to seeing the finished product at Carlisle!
There is one other factor worth addressing here, which is what effect masses of metal, or lack thereof, might do to the cooling of the head, as well as with the possible formation of hot spots, not adequately cooled in comparison to the rest of the head. I guess this is a sort of terra incognita for a DIY'er without the luxury of the factory's resources.
I hope for the best possible results and look forward to seeing the finished product at Carlisle!
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Chuck W wrote:Try again.....you should try and stay away from blanket statements like that.MerkXRTurbo wrote:Velocity stacks do nothing on a turbo.
you want a smooth transition out of the plenum into the intake tract. Colin, you are right to use them, esp in an intake with a bit of a plenum.
YEA,.. THATS THE WORD I WAS LOOKIN FOR.
SMOOTH.
SEE,... SMOOTHE GOING INTO THE TURBO, AND SMOOTHE GOING OUT OF THE PLENUM .
IM NOT SURE, BUT I BET ALOT OF THOSE 100,000,00000 HORSEPOWER TURBO 6 SECOND RACE CARS USE BELLS AND STACKS ALL OVER THE PLACE.
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1988 Mercedes Benz 190e - awaiting airbag suspension
2005 Dodge Magnum - 336,000 Mile Daily driver
2008 Subaru Legacy GT - crazy loud boxer rumble
2009 Suzuki GSX650F - crotch rocket
ig: @DJ_Kingpin
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Umm, yeah the RS YB has it inside their plenum, so does T's, Phil's, some other dudes in the UK..etc,etc etc. I don't want trumpets in my plenum though....I want drums..I more of a beat keeper. LOL.
Wilky Alex with the red 16v I think is selling his engine.
Wilky Alex with the red 16v I think is selling his engine.
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Yup, he wants $2000 for it (or at least that's what he told me at Carlisle...) it's got adjustable cam gears, PM header and intake manifold (duh), built up bottom end with Wiseco pistons and Crower rods, etc.
I think he has a few modified Volvo heads that he's selling, too... but after seeing the welding on them... bleghh...
Colin
I think he has a few modified Volvo heads that he's selling, too... but after seeing the welding on them... bleghh...
Colin
Last edited by Colin on Sat Jan 07, 2006 1:16 am, edited 1 time in total.
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89 Scorpio 2300-16V // 07 F-650 Cummins // 00 Beetle TDI
File to fit, paint to match.
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Muffa's white volvo head did about 400hp at 12 psi with big turbo, and old stock 2.3 block.
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alex told me 450hp.
guess he was rounding off to the nearest "50"
1985 Merkur XR4Ti - 2.5 ranger block greyhound bus turbo
1988 Mercedes Benz 190e - awaiting airbag suspension
2005 Dodge Magnum - 336,000 Mile Daily driver
2008 Subaru Legacy GT - crazy loud boxer rumble
2009 Suzuki GSX650F - crotch rocket
ig: @DJ_Kingpin
1988 Mercedes Benz 190e - awaiting airbag suspension
2005 Dodge Magnum - 336,000 Mile Daily driver
2008 Subaru Legacy GT - crazy loud boxer rumble
2009 Suzuki GSX650F - crotch rocket
ig: @DJ_Kingpin
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