VDI and 5/6port question.. need SMART people
#26
Former Moderator. RIP Icemark.
Originally posted by NZConvertible
And if you have trouble finding the "5th/6th ports" in the Factory Service Manual, that's because the correct name for them is the auxiliary ports.
And if you have trouble finding the "5th/6th ports" in the Factory Service Manual, that's because the correct name for them is the auxiliary ports.
![Wink](https://www.rx7club.com/images/smilies/wink.gif)
And my take on them...
On lightly ported engines to stock engines, the posts will only be an advantage. There is a major loss in low end torque with them not operating. Simularly the VDI works best utilizing the dynamic pulses caused the the ports closing.
With heavy ported engines or forced induction engines, you are better off not using the aux ports, but rather the biggest port area and latest time possible.
On a forced induction motor, the dynamic pulses are almost completly masked by the increased pressure on the induction track. Therefore again the VDI is pretty useless. On a normally asperated motor, that is heavily ported, the VDI timing will need to be checked by dyno tuning as the stock VDI timing is based on the stock intake runners and timing.
Last edited by Icemark; 05-09-04 at 11:32 PM.
#27
**-P I drive a miata.
![](https://www.rx7club.com/images/misc/05_year_icon.png)
Join Date: Jul 2002
Location: albany, GA
Posts: 1,600
Likes: 0
Received 0 Likes
on
0 Posts
I know this is way off topic, but what do you guys think about using fiberglass and epoxy for the supercharger intake adapter instead of metal? I would think it would be easier to work with and make a more desirable shape. I'm mostly worried about it not holding up....
#28
Lava Surfer
![](/images/misc/20_year_icon.png)
Join Date: Mar 2002
Location: Kailua, HI
Posts: 2,354
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by nonameo
I know this is way off topic, but what do you guys think about using fiberglass and epoxy for the supercharger intake adapter instead of metal? I would think it would be easier to work with and make a more desirable shape. I'm mostly worried about it not holding up....
I know this is way off topic, but what do you guys think about using fiberglass and epoxy for the supercharger intake adapter instead of metal? I would think it would be easier to work with and make a more desirable shape. I'm mostly worried about it not holding up....
#29
777** The Anti-rice
![](https://www.rx7club.com/images/misc/10_year_icon.png)
Thread Starter
Join Date: Sep 2002
Location: Seattle, WA
Posts: 2,100
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by nonameo
I know this is way off topic, but what do you guys think about using fiberglass and epoxy for the supercharger intake adapter instead of metal? I would think it would be easier to work with and make a more desirable shape. I'm mostly worried about it not holding up....
I know this is way off topic, but what do you guys think about using fiberglass and epoxy for the supercharger intake adapter instead of metal? I would think it would be easier to work with and make a more desirable shape. I'm mostly worried about it not holding up....
#30
Senior Member
![](https://www.rx7club.com/images/misc/10_year_icon.png)
Join Date: Jun 2003
Location: Burnaby, B.C.
Posts: 427
Likes: 0
Received 0 Likes
on
0 Posts
Thread
Thread Starter
Forum
Replies
Last Post
eplusz
General Rotary Tech Support
15
10-07-15 04:04 PM