Being my motor is coming out I am thinking of doing inlet piping at the same time. I was wondering if all of the inlet piping ie. 911Marski, Speedtech, Evoms, USP etc are all the same performance wise. When I compare descriptions (other then the 911Tuning bendable) and photo's they all look all the same & they all have the bottle neck on the one intake on the OEM intake plenum.

The only one that I see that does not have it is Speedtech's HiFlow Intake Plenum, but is it worth twice the cost coming to REAL power and spool gains. See my list of mods below and add Meth injection and about 1.5BAR of boost to that list.

Would this design really make a difference?

Mind you it makes sense being all the other piping might me limited my that neck down on the factory plenum, but others have used the less expensive OEM plenum and made more power.

Other then the Meth, I might be going later on to a K24/BILLET 20 or 3076's, so I am not sure if at that level I might have more of a gain with Speedtech's FULL inlet kit.

Any help or insight would be great, especially if you have hands on experience with inlet gains etc.

Here is the link to the Both offerings:

http://www.speedtechexhausts.com/page42.html

Thanks

Bobby Ali

ba

 

Lately inlet piping has been like exhaust choices ..LOL..Different variations..
If you do a search you will get a lot of info on this topic..
I like smooth piping for better flow but others use the accordion piping for ease of installation which wont matter to you..To each his own..
You will need them if you go to K24/20s or 3076s.
Personally back at the beginning with my 18gs with 93 pump gas , 1.3 peak then without all my mods now ,I didn't really gain anything...Was around 525 DynoJet rear wheel HP then..
Good Luck

 

John,

being that you look at design very closely, wouldn't this set up from Speedtech be a better set up then the bottle neck stock plenum set up available?
http://www.speedtechexhausts.com/page42.html

He uses the indestructible 70mm EVOM piping, the air smoothly continues into his hi-flow plenum 70mm size into the air box. (getting rid of the restrictive bottle next stock plenum)

What are your thoughts specifically on going with the EVOM vs the EVOM with Speetech Hi Flow Plenum (he sells both & his HiFlow Plenum comes with the EVOMS piping).

Again if someone else has thoughts on the above they can share as well.


Thanks

Bobby Ali

 

I like the evoms plastic pipe as it does not get bent up or rubbed through when it contacts drop links or toe arms. If you take your time and make sure you clock the piping correct nothing should rub so any aluminum pipe setup would work.. I stay clear of any flexible tubing.

I really would rather use a alpha N tune and lose the maf and the inlet piping all together.

 

what!!!!!!!!!!!!! when did you hurt the Motor?
let me know if i can help Bobby in any way.

I am removing my 2.5" hardpipe kit if your interested.

 

PM sent.

 

The reason I stopped selling the hard piping is because most( shops) cannot put it in correctly... same goes for the other hard piping versions... I've take them OFF on clients cars because they were rubbing thru... Or simply were not designed right and you needed to do at least 2 motor drops.. Not making this up... I can forward 2 clients from 6speed with such products that took them out and went flexible... I am not bashing just passing on honest info..
markski

 

I have a different experience with the hard piping. For example, I have had the hard plastic EVOMS piping on my car for over 100,000 miles and it has no visible signs of wear anywhere, some slight chafing marks, but absolutely no wear at all and the plastic is 1/4" thick. I happen to know this because I have had the motor out a couple of times over the years and inspected the pipes each time. I have also heard of the flexible pipe and the aluminum pipe wearing through, but never the EVOMS hard pipe. The stuff is very tough, very thick and very indestructable - it would take a lot to wear though, but any pipe improperly installed and aggressively rubbing against hard steel will eventually wear though, which is why it is importatnet to line it up well as Tim pointed out - and this is not difficult to do.

We have sold countless SpeedTech Hi-Flow Plenum Intake Kits with the EVOMS hard piping. We chose to use the EVOMS piping with our SpeedTech Kit, as we feel it's the best piping for the application and we have complete confidence in it. Every once in a while a shop or an individual will have questions with the fit (normally shops have an easy time - DIYer's have more questions) and we walk them through it over the phone based on our experience. Ocassionally, we have to cut one of the hard pipes and install an additional silicon coupler to get the pipe aligned perfectly (this allows for additional fore/aft and up/down twist adjustment and is very easy to do), as every car is a little different, but once set - it's a set it and forget it for the life of the car. There is substantial peace of mind with the hard pipe that typical road debris shot up by the rear tires can not breach the pipe like a soft hose or that minor rubbing could wear through, like with a soft, thin material.

In the end, it's all about choosing what makes you comfortable and what level of risk you are willing to accept. Personally, I would not use anything but the hard plastic pipe on my car, as I am not willing to risk a breach that would result in the turbos and subsequently the motor inhaling sand and rocks until you realize something is wrong with your car. That is a disasterous end to a performance mod. This is an area that is seldom checked and the long term peace of mind one gets with the hard pipe is well worth the small extra effort to install a product that is tougher than the OEM piping and totally up to the job - my honest opinion...

 

I think installation of the inlet pipes is critical as you don't want the pipes to rub on anything regardless whether they are plastic, metal, or whatever. My car has dual walled pipes that are made out of some composite rubber substance which has a steel coiled wire embedded in it. These pipes have great insulating properties keeping the intake air cool. I've never had any issues with it and they've been on the car for 6 years. If I was in the market for some intake pipes I'd probably go with the readily available Evoms plastic pipes as opposed to the aluminum ones some companies sell. The metal one's will heat soak badly.. Just my $0.02..

 

When my hard EVO piping was installed it was on a 4 point chassis lift ,,,
Everything cleared in the air BUT when it was on the ground,, a pipe on one side did rub and have to be adjusted accordingly...
So I can say its best to have your car on a lift that raises it with the wheels for the final tweaking..

 

best inlet piping is NO inlet piping

 

Marksi, why couldn't you use your flexible inlet piping to install as a fender well intake? It seems like a decent bit of the cost of the fender well intake is the complexity of the bends to get the cone intake to the right location. But if the flexible piping is just as good, why couldn't you use that material and significantly cut the cost, ESP since (with a mafless setup) you'd also be skipping the custom made intake runner at the oem air box.

Just curious. I'm sure it's something you all have thought about or tried, just curious if there was a way to do the fender well intake at a more affordable price point.

Thanks for educating me!

 

in 2002 by business partner did that... but how are you going to keep it against the body , away from the wheel- plus thats where all the debris is picked up by the wheel anyways...

 

I'm just asking the questions, not trying to re-invent the wheel. I'm just seeing the success you've had with the fender well intakes, and seen that you recommend the flexible intake if going to stock location, so asking why you couldn't use the flexible to use as the fender well system.

I'd imagine there has to be some way it could be secured close to the body of the car. Even the hard piping system has some brackets to give additional support.

Also, it would seem there's similar exposure to the flexible piping if you go to the stock routing location vs fender well. I.e. both have about a 1-2' run where it's exposed in the fender well. Did your partner's experience prove otherwise?


Any chase you can elaborate more on what material is used for the flexible piping, similar material used in other platform applications, or is that as markski trade secret!

 

Actually that's not correct.... the piping above ICs is exposed almost in its entirety.... and its right above/side of wheel... I say 70% of the pipe...
the flex in oem position is not even close to the wheel... funny that the OEM part that is on the bottom is plastic as well... not aluminum... I probably sold 100 units and used myself this unit for 40K miles and never punctured... you do not need an expensive motor drop just lower it... I pre cut the piping so you cant mess it up... I went thru 7 different flex pipes until I found one I liked... the inside is smooth and it withstands high heat... that's important...
Bojans car came to me with a alu hard pipe- hole in the lower bend near the control arm... another was the plastic that never fit- he was told you need to put it on.. cut to fit and put it back on... etc... I have pics for those who wish to see... just do not want to slam other sponsors... hard piping is not easy to install and if you think that a shop that doesn't even know how to do a proper boost leak test can do this then your in for a surprise...
markski