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#1 |
Who engineered this?
Join Date: Nov 2002
Location: Atlanta
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![]() Change my mind.
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#2 |
Salaminizer
Join Date: Nov 2007
Location: Reading pa
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![]() No, you are correct. Especially if you port the crap out of it and gasket match.
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Feedback thread https://forums.tbforums.com/showthread.php?t=144924 1978 242, 5.3 L33 1979 242, MS, R brakes 2006 V50 T5 AWD @ 17 PSI |
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#3 |
Board Member
Join Date: Aug 2019
Location: Nieuw en Sint Joosland
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![]() Stainless steel exh valves are great!
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#4 |
Board Member
Join Date: Aug 2006
Location: E(Seattle!Vancouver! San Francisco!LA!) Helsinski
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![]() My 531 is under construction. Only minor finishing on intake side and 38 exhaust valves. Good for 400 hp says the headmaster. Said also if using around 12 mm valve lift, 44 mm intake valves are fine.
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#5 |
Volvo upgrades
Join Date: Sep 2005
Location: North Wales
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![]() Why would you ruin the flow by gasket matching?
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#6 |
Volvo upgrades
Join Date: Sep 2005
Location: North Wales
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#7 |
Board Member
Join Date: Jun 2009
Location: Swampscott, 01907
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![]() Wrong. A cylinder head with better flow characteristics is ALWAYS better. If you had said "A big valve 8valve is better than a 16valve head for 99% of TbrickERS", then I'd be forced to agree.
It's like saying you didn't want to date the super-hot, super-nice chick because she was too high maintenance. Maybe it was just maintenance you couldn't do. |
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#8 |
dude
Join Date: Feb 2009
Location: Where have all the quad squares gone? VV,Ca
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![]() Hmmm isnt a bigger valve, ported 8v still cheaper than a 16v swap?
NA set up 16v all day, way more power under the curve. Turbo Meh splitting hairs at that point. 16v make more but at what expense? Now if the 8v was casted with a decent port shape, combustion shape, this would all change.... |
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#9 |
Salaminizer
Join Date: Nov 2007
Location: Reading pa
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#10 |
Volvo upgrades
Join Date: Sep 2005
Location: North Wales
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#11 |
Board Member
Join Date: Jul 2018
Location: Texas
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![]() I kinda wish I could make my valves smaller or add some sort of fins/grooves to them
So for me yeah I think 8V > big 8V > 16V
__________________
'96 854 Platinum - "Trusty" '92 245 - "Boat" '71 145 - "Rusty" '93 Land Cruiser - "Ruby" '01 Cherokee - "Janice" |
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#12 |
Board Member
Join Date: Oct 2015
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#13 |
Ronald Culberbone III
Join Date: Feb 2010
Location: Portland, OR
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![]() I think a well ported stock valve head would work for 95% of tbrickers.
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Cult Person. Pissing in your Kool-Aid. |
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#14 |
Hunting for a turbo
![]() Join Date: Dec 2003
Location: Hillsboro, OR
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![]() spend the money on a real turbocharger instead
__________________
One Volvo left. 1982 244ti (313chp), 2020 Nissan Leaf daily driver, 2016 Kawasaki 650R (76chp) |
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#15 |
Board Member
Join Date: Apr 2010
Location: Ballarado
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![]() Certainly more than adequate for me, I also prefer the 8v sound. Call me a weirdo. IDK I'm not smart enough to argue the details. 16v does have its own inexplicable cool factor.
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#16 |
Board Member
Join Date: Sep 2009
Location: Aberdeen, Scotland
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![]() A 16v can use shorter duration cams so will have better mid range power and still match a 8v top end power, that’s the advantage I think of a 16v engine over a 8v.
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#17 |
Volvo upgrades
Join Date: Sep 2005
Location: North Wales
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![]() No gasket matching is grinding the ports out so they are the same size as the gaskets. All it does is slow the gas speeds. The throat is not where there is any restriction in the head but around the valve stem is where the work is needed
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#18 |
Volvo upgrades
Join Date: Sep 2005
Location: North Wales
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![]() Yes that is the advantage but you do loose torque and engine braking with a 16v. David Vizard has come up with the polyquad head that increases swirl and tumble to improve torque. Never see it done with a Volvo head and how much gain you get is a ?????
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#19 |
Board Member
Join Date: Jun 2009
Location: Swampscott, 01907
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#20 | |
Who engineered this?
Join Date: Nov 2002
Location: Atlanta
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![]() Quote:
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#21 |
Board Member
Join Date: Jun 2009
Location: Swampscott, 01907
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![]() Damn! You guys gettin' nasty...
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#22 |
Board Member
Join Date: Aug 2019
Location: Nieuw en Sint Joosland
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![]() Actually turns out to has a huge big c*ck
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#23 |
Happy playing the blues
Join Date: Jun 2002
Location: S NJ, a suburb of Phila.
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![]() Well, I've been running a flowed 405 with stock valves for a long time. It revs easily to 7k or more if you wanted to and runs better from off idle to redline than when I ran the engine with a stock head.
I think the 405 with flow work or any stock 8v head with work would easily satisfy most power goals for a fun street car while keeping it 8v simple.
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Dave, 1982 242 turbo. 338k miles. MVP coilovers and 3" exhaust. Flowed 405 with a V15. Cossie turbine housing with upgraded compressor housing. 90+, IPD remote oil filter. Some other goodness, too. Been lots of fun over 25 years. Restored in 2k. Now ready for a 2nd restoration. 1993 245 Classic, 430k miles, enem V15. IPD bars and chassis braces. Simons sport exhaust from Scandix. sbabbs ezk chip. Been a good road warrior. Genuine Volvo rebuilt leaky M47. ![]() |
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#24 |
Board Member
Join Date: Jan 2015
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![]() Are we talking pure performance or driveability as well?
At the same power level, wouldn't a 16v have better street manners than an 8v? |
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#25 | |
BRANDSCHUTZVORSCHRIFTEN!
![]() Join Date: Dec 2002
Location: mont, AL
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![]() Quote:
a better way might be to say "you'll have best results when you do not exceed your abilities as a mechanic", but then if you never try new things you'll never learn anything either.
__________________
"They bum rushed them in their own crib, they drank all their beer, they partied with their ladies and they left with the trophy" Now with in-house Dyno tuning! Megasquirt Tuning! Plug and play LH 2.4 Megasquirt, now with stealth mode! |
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