Stealth 993

I can get the intake real cheap, but what else do I need? A new throttle body, some vacuum hoses?

What about the system activation, & ECU? Is it even worth it?

The 95 seams to want to rev more then the 97, but the 97 has such a smooth & much more powerful mid range! Seams to pull more in the top end.

c993k

Change your chip and you'll notice the same result without going to the expence of adapting the varioram.

The Brewmeister

^^^I'm with him. Changing the car over to varioram would probably be way too much $$$ for
a 10 HP gain. Get the chip and save the rest for maintenance. It is your daily driver after all.

Stealth 993

Already got a chip, but I want more midrange, the 95 doesn't pull nearly as hard as the 97.

I can get the intake plenum for CHEAP! I just need to know what other parts & issues there are.

It's not all about the 10hp, it's the brood torque curve!

deleonl1

Do a varioram search...the conversion has been done by a few people on here. If they're still around, maybe you can get more info from them.

Where can you get the varioram intake manifold for cheap?

AOW162435

It always puzzles me when people state that their car 'pulls' - on a 911 forum.

Maybe I'm not understanding correctly and these comments actually refer to driving the car in reverse.....

It makes sense on the Civic forums though


Andreas

chris walrod

It really depends upon how much Vario content you have access to. I have a set of Varioram intake and exhaust valves that would compliment this addition.

Otherwise, I wouldnt bother despite myself wanting to do this some time ago.

Cactus

Let me help!

Mark in Baltimore

It's, ya know, one of those figures of speech. I've only been in this country for two years and even I know that.

Falcondrivr

So who's selling a good chip? Seems like maybe Steve Weiner, Rennsport here on the board?

Steve Weiner-Rennsport Systems

Hi,

There are many reasons why two such similar cars can perform differently.

Although the Varioram intake system is worth around 15-20 lbs-ft from 2000 to 5000 RPM, there is very little difference in torque and HP above that range. We've dyno'ed several such combinations, some 3.6's and some 3.8's, where we swapped intake systems and made power runs. Peak HP with almost identical in these situations.

While a Varioram conversion is not terribly difficult, I would kindly suggest that you do some additional diagnostics to make sure that everything is working to specification before any money is spent on additional hardware. We usually check cam timing (this is very important), perform leakdown tests (!), check air/fuel ratios, and check backpressure on both cats.

guards red

Hi,

I have done this conversion here in the UK where there seems to be less techinical support for this sort of thing. So if i can do it, so can you.

How easy or how hard will depend upon what you get with the manifold. For instance the airbox other than the lid is different, the pipework for the breather system is different and it will depend whether yours is a C4 or a C2 and which car the manifold is from. All the heater pipe work is different too.

Wiring wise it;s pretty easy, I can help you with that, but where it might get costly is the ECU. I was told that buying the right chip will run the Varioram system but the three chips (one after the other) supplied by the US vendor did not work. My car does not have drive block but it would not start with the chips supplied. I had to get a varioram ECU for big bucks being desperate and unwilling to go back to non varioram. In hindsight I think if you have some one trustworthy who can live program your ECU, they should be able to add a channel to run the system.

One of the best things to recommend at this early stage is get yourself a copy of the Porsche PET. This will allow you to compare parts and numbers to see if there is a differnce before you take anything off. Some also so you can run the system using the standard pre varioram vacuum resevoir but I fitted the larger post varioram one as its not expensive and because Porsche fitted it for a reason.

The manifold should come with the throttle body, if it doesn't, I wouldn't bother as they're sit down expensive.

If you have any questions let me know, I'm happy to help.

Regards
GR

RDS928S

Steve W.

How is cam timing performed?

Thks Rich

Steve Weiner-Rennsport Systems

Rich,

We use a dial indicator and a mechanical rocker installed into # 1 and # 4 intake positions. One needs the tools and a healthy dose of patience to do a proper job of it.

Mark in Baltimore

Steve,

I believe I've asked you this before but can you adjust the cam timing with the engine in the car?

Thanks!