85-86 intake runner tubes
#4
Inventor
Rennlist Member
Rennlist Member
Don't forget a side of TQrings for those tubes! (This simple mod makes a noticeable difference.)
I like the stock rubber intake hoses, myself. (They don't look as good, but they are easier to get a good seal with, I've found.) A new set of those will last a long time. (Especially, with the rings. Even longer with a crank vent bypass system.)
I like the stock rubber intake hoses, myself. (They don't look as good, but they are easier to get a good seal with, I've found.) A new set of those will last a long time. (Especially, with the rings. Even longer with a crank vent bypass system.)
#5
Drifting
The Genuine Porsche brand boots/seals last a long time. The "generics" are much softer, not as oil resistant, and start cracking from oil/heat/ballooning/etc after a short time. I put a set of the generics on mine when I first got it running. Once I decided they were no longer good, I replaced them with a used set from an extra intake manifold. The genuine Porsche parts are much stiffer and sturdier.
#6
Captain Obvious
Super User
Super User
No need to over complicate things. Get some 2" radiator hose (NAPA sells them) and cut them to size. You can make them a littel longer so the clamps can't slide off the pipes (no need for "torque rings"). I've made a set for my boosted '85 years ago and they are still flawless.
#7
Inventor
Rennlist Member
Rennlist Member
Making the hoses longer will just make more turbulence by making a larger gap, and won't increase the clamped area. (You can't make them shorter because the center 'T' touches both plenums.)
It's difficult to cut hose of that size uniformly and the actual clamped area is quite small, so it's likely to not seal properly, unless it is professionally done. Cheap, slippery, silicone hoses (unlike Mark's) tend to squeeze out from the clamps.
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#11
Link:
http://www.liftbars.com/
Scroll down to this info on the TQrings with photos.
"TQrings - S3 intake enhancers
Fills the empty transition from plenum to runner. Increases air velocity and promotes more equal cylinder filling by reducing turbulence. Closer cyl to cyl AFR means less fuel per RPM for more part throttle power, better MPG, and lower emissions.
New S300s programming and map tuning makes for a virtually flat WOT AFR from 1000-6400 rpm, silky smooth idle, easier starting, and awesome performance from cold start to hot. Extremely low rpm running w/o stalling or complaint. Drives smoothly at 1000 rpm (or less). Pulls strongly in top gear at highway speeds.
Easily installed. Remove plenums, slide in rings, replace plenums.
click for larger click for larger
Included:
(8) Rings - machined aluminum"
Cost is $34 for the set.
http://www.liftbars.com/
Scroll down to this info on the TQrings with photos.
"TQrings - S3 intake enhancers
Fills the empty transition from plenum to runner. Increases air velocity and promotes more equal cylinder filling by reducing turbulence. Closer cyl to cyl AFR means less fuel per RPM for more part throttle power, better MPG, and lower emissions.
New S300s programming and map tuning makes for a virtually flat WOT AFR from 1000-6400 rpm, silky smooth idle, easier starting, and awesome performance from cold start to hot. Extremely low rpm running w/o stalling or complaint. Drives smoothly at 1000 rpm (or less). Pulls strongly in top gear at highway speeds.
Easily installed. Remove plenums, slide in rings, replace plenums.
click for larger click for larger
Included:
(8) Rings - machined aluminum"
Cost is $34 for the set.
#13
Thanks Brian! Yeah, I've wanted a 968 cab for a dozen years, way before I even considered a 928. With there only being ten speed yellow cabs brought in to the States in 94-95, I couldn't pass this one up.
I like that garage in your avitar, I want one of those too!
I like that garage in your avitar, I want one of those too!
#15
Guestimation? Did you read what he wrote? He just said he dyno tested these pieces. Transition for air movement is a science and it works. But just because most motorsports teams spends 1000s to millions on the science of how air flows, don't worry about it. They don't know what they're talk about.