It looks like you calculated the runner diameter, not length. Regardless, the calculated length is from the valve face to the entrance of the port.
It looks like you calculated the runner diameter, not length. Regardless, the calculated length is from the valve face to the entrance of the port.
1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
2004 GSW TDI, 5 speed, fully loaded, modified.
Aurora ignition wires for sale. Link to info
Super60 roller cams or custom/billet cams. Link to info
I just read what I wrote. I meant entrance of the runner, not port.
1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
2004 GSW TDI, 5 speed, fully loaded, modified.
Aurora ignition wires for sale. Link to info
Super60 roller cams or custom/billet cams. Link to info
In the industry, when the rating numbers are difficult to obtain the typical first attempt is to eliminate all of the production variation.
Casting flaws, core shift, and machining variations are corrected throughout and things like deck height and chamber volume are run at the minimum specification to increase output and offset losses.
With what was done to the plenum, neck entrance, and runner entry, the intake was 'acceptable' during idle and mid-range operation but became restrictive as RPM increased.
The one-piece seemed to also suffer from increased 'alignmentitis'. The port alignment between the head and intake and the alignment of the throttle body and intake neck were terrible, in some cases.
Some one-piece intakes could have such excessive core shift and/or machining issues, at the mating surfaces, that markings like the firing order numbers (e.g. TB flange) appeared cut in half or weren't present at all.
1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
2004 GSW TDI, 5 speed, fully loaded, modified.
Aurora ignition wires for sale. Link to info
Super60 roller cams or custom/billet cams. Link to info
Here are 2 pics of a one piece intake, The one on the left looks like it would flow alittle more.
with a few well placed dabs of weld you could totally remove those, thats what randy's intake is going to be like. but for someone running a stock mandated race class that one on the left could be the ticket.
It may be difficult to tell from the photo.
The #4 runner looks to have increased PCV residue which may be making the "tonsils" appear less prominent.
With regards to PCV, there is another item worth mentioning about the one-piece.
The intake is unable to completely evacuate PCV pull-over oil. In other words, oil pulled from the engine via the PCV system can collect in the bottom of the plenum with little chance of being removed.
If this becomes excessive, the PCV system will generate an audible 'gurgle' which is the oil bubbling as vacuum is pulled through the collected puddle.
Thanks
there are definately 2 different castings of the 1 piece in regards to those bumps. I've seen numerous ones of each. Even the 2 piece has 2 different castings of the lowers in regards to those bumps.
hmm never thought about measuring them with more than my eyeball.
That is really interesting. I'll have to take some pics and measurements this weekend as I have one example of each in the basement.
your eye-crometer...hmm never thought about measuring them with more than my eyeball