Varioram conversion??
Thread Starter
Guru
Lifetime Rennlist
Member
Rennlist Small
Business Sponsor
Lifetime Rennlist
Member
Rennlist Small
Business Sponsor
Joined: Aug 2001
Posts: 15,751
Likes: 104
From: yorba linda, ca
Varioram conversion??
Anyone here ever converted a 1995 to Varioram? Wondering if I could come up with a complete Vario intake assy., would it be worth the trouble and what would need to be done the with engine harness?
Any thoughts?
Thanks!!
Any thoughts?
Thanks!!
Three Wheelin'
Joined: Feb 2002
Posts: 1,663
Likes: 3
Chris:
Just before I sold my RS replica for the move to the TT, I completed the ground work for doing the VRam conversion on my MY95.
If your car has had the engine wiring harness recall, then you should have the "universal" harness that already has the pigtails for the Varioram control solenoids. Assuming this, then here is a generalized list of what you need:
1.) Varioram Intake System most commonly sourced as a take off from someone who has done a Supercharger install. This should give you the aluminum castings, throttle body, and most all vacuum lines.
2.) The Secondary Air Injection pump is different. All pieces can be sourced new for about $300
3.) Brackets and linkage for cruise control servo. New parts price out at about $60
4.) Larger vacuum reservoir as used on the MY96-98 cars. Mounts on left side of the engine bay above the shock mount.
5.) Air cleaner box from Varioram car. This is a tough one to swallow as the back housing is only sold as a set from what I found and I did not find any used ones that were still good.
6.) Euro RS ECU. Still available new...
All told, the conversion could cost as little as $2000 to as much as $3500 depending on how many new parts are sourced. This is assuming you do this as a DIY...
Hope this helps
Regards
Just before I sold my RS replica for the move to the TT, I completed the ground work for doing the VRam conversion on my MY95.
If your car has had the engine wiring harness recall, then you should have the "universal" harness that already has the pigtails for the Varioram control solenoids. Assuming this, then here is a generalized list of what you need:
1.) Varioram Intake System most commonly sourced as a take off from someone who has done a Supercharger install. This should give you the aluminum castings, throttle body, and most all vacuum lines.
2.) The Secondary Air Injection pump is different. All pieces can be sourced new for about $300
3.) Brackets and linkage for cruise control servo. New parts price out at about $60
4.) Larger vacuum reservoir as used on the MY96-98 cars. Mounts on left side of the engine bay above the shock mount.
5.) Air cleaner box from Varioram car. This is a tough one to swallow as the back housing is only sold as a set from what I found and I did not find any used ones that were still good.
6.) Euro RS ECU. Still available new...
All told, the conversion could cost as little as $2000 to as much as $3500 depending on how many new parts are sourced. This is assuming you do this as a DIY...
Hope this helps
Regards
Thread Starter
Guru
Lifetime Rennlist
Member
Rennlist Small
Business Sponsor
Lifetime Rennlist
Member
Rennlist Small
Business Sponsor
Joined: Aug 2001
Posts: 15,751
Likes: 104
From: yorba linda, ca
Thanks Jim for the info!
This is just a semi-random thought at the moment. A good friend of mine that also has a '95 993 is keen on this upgrade as well. I believe he has found a donor intake assy. from a supercharger install. I am not sure what gets reused with s/c install's, so I dont know what is included with these varioram assy's. We should know more details soon...
Thanks again!
This is just a semi-random thought at the moment. A good friend of mine that also has a '95 993 is keen on this upgrade as well. I believe he has found a donor intake assy. from a supercharger install. I am not sure what gets reused with s/c install's, so I dont know what is included with these varioram assy's. We should know more details soon...
Thanks again!
Thread Starter
Guru
Lifetime Rennlist
Member
Rennlist Small
Business Sponsor
Lifetime Rennlist
Member
Rennlist Small
Business Sponsor
Joined: Aug 2001
Posts: 15,751
Likes: 104
From: yorba linda, ca
One other question I forgot to ask:
Are the cyl heads different for 96 and up? I thought a larger intake valve was used, possibly a larger port as well?
If this is the case, I am not sure if I will realize the potential of this power gain??
Are the cyl heads different for 96 and up? I thought a larger intake valve was used, possibly a larger port as well?
If this is the case, I am not sure if I will realize the potential of this power gain??
Three Wheelin'
Joined: Feb 2002
Posts: 1,663
Likes: 3
Chris:
From what I know, the heads and valve sizes are the same on the MY95 and 96 cars. Now when you go to the 3.8, that's where things change.
The advantage of the Vram comes from having a variable intake runner system that maintains intake flow velocities, there by enhancing the momentum effects of the intake charge pulse. The Varioram plenum / intake stacks have three modes, 2 plenums and has a 2 throttle plate progressive throttle body. It works along the same premise as a progrssive 2 BBL carburetor back in the "good 'ol days"...
To really appreciate the Vram, you have to want better midrange torque. From an overall max. power aspect, there is not much gain. However, the torque increase at 3800 RPM is almost 50 ft. lbs. of torque. If you think about how that effects the torque curve and how that torque would be valuable to the driver at the RPM, then the value of the Vram can be appreciated.
Hope this helps.
Regards
From what I know, the heads and valve sizes are the same on the MY95 and 96 cars. Now when you go to the 3.8, that's where things change.
The advantage of the Vram comes from having a variable intake runner system that maintains intake flow velocities, there by enhancing the momentum effects of the intake charge pulse. The Varioram plenum / intake stacks have three modes, 2 plenums and has a 2 throttle plate progressive throttle body. It works along the same premise as a progrssive 2 BBL carburetor back in the "good 'ol days"...
To really appreciate the Vram, you have to want better midrange torque. From an overall max. power aspect, there is not much gain. However, the torque increase at 3800 RPM is almost 50 ft. lbs. of torque. If you think about how that effects the torque curve and how that torque would be valuable to the driver at the RPM, then the value of the Vram can be appreciated.
Hope this helps.
Regards
Trending Topics
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
10 Porsche Colors That Have More Personality Than Most People
Verdad Gallardo
Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod
Verdad Gallardo
10 Reasons I Hate Going to the Porsche Dealership (& the 1 Reason I Stay)
Joe Kucinski
Porsche Shakes Up The Nürburgring Lap Record Table Once Again
Verdad Gallardo
6 Ways the Porsche 911 GT3 S/C Redefines Performance
Joe Kucinski
10 Wildest Homologation Specials Porsche Ever Sold
Verdad Gallardo
Super Rare RUF BTR III Comes Out of Hibernation, Looking For a New Home
Verdad Gallardo
10 Porsche Opinions That Can Start a Fight
Joe Kucinski
One-Off Porsche 911 S/T Takes Inspiration From Famous '70s Race Car
Verdad Gallardo
Three Wheelin'
Joined: Feb 2002
Posts: 1,663
Likes: 3
Kim:
I do not believe so since your engine started as a 3.6. We can check with Steve, but I am pretty sure your head castings are 3.6 ones.
What changes are the lower manifolds and the lower runners/rubber couplers. Given that you are running the black stock 95 system, this is why I am confident we will not have a port / manifold diameter issue with your setup...
Regards
I do not believe so since your engine started as a 3.6. We can check with Steve, but I am pretty sure your head castings are 3.6 ones.
What changes are the lower manifolds and the lower runners/rubber couplers. Given that you are running the black stock 95 system, this is why I am confident we will not have a port / manifold diameter issue with your setup...
Regards
Thread Starter
Guru
Lifetime Rennlist
Member
Rennlist Small
Business Sponsor
Lifetime Rennlist
Member
Rennlist Small
Business Sponsor
Joined: Aug 2001
Posts: 15,751
Likes: 104
From: yorba linda, ca
Originally posted by Steve Weiner-Rennsport Systems
Hey Kim:
No worries mate, as your heads have been "massaged" and have other things done,...
Did 'em myself.
Hey Kim:
No worries mate, as your heads have been "massaged" and have other things done,...
Did 'em myself.
Rennlist Member
Joined: Jan 2003
Posts: 2,192
Likes: 0
From: Northern IL and SW FL
Just upgrade the DME Chip to one from Steve and you will achieve similar midrange torque increase as provided by Variocam for about $500.00! No Carbon Buildup warning light issues either.
Passed On
Rennlist Member
Rennlist Member
Joined: May 2001
Posts: 3,031
Likes: 3
From: Pittsburgh, PA
Why????
Do some archive searching; you'll see comments that difference between '95 and Varioram cars is pretty much negligible.
Find something more beneficial to throw your money away on (C4S brakes, maybe?)
Do some archive searching; you'll see comments that difference between '95 and Varioram cars is pretty much negligible.
Find something more beneficial to throw your money away on (C4S brakes, maybe?)