TPI Porting question....

[Barbie]

I have an accel base, and I have just finished taking the center divider out of a pair of SLP runners. What a PITA!!

My questions is, reguarding the plenum. I've seen the sides ported where it meets the runners. Has anyone ever taken the divider out of the front where the throttle body mounts? I've seen where the EGR dam has been shortened but I'm wondering if this would make a difference.

I'm working on a spare speed density plenum for my '90. I am adventurous, but I don't want to runin it. Any thoughts are appreciated.

This is a rough "photoshop" on what I am thinking of doing.

Barbie

 

[vettn94]

I did this a while back , by all means if you're doing the sides you might as well do the front as well.
There are 2 surfaces that protrude from the sides, smooth those out and just be careful not to go too far on the bottom hump. From what I remember there is an air passage or something running though there.

 

[-=Jeff=-]

Yes I have removed the divider betweent he runner tubes to Match the plenum to the SLP runners..

I have also siamesed the front intake for a 58mm TB.

The humps behind the TB openning can be smoothed but as vettn94 said.. don't go too far since there is an EGR passge near there

 

[WhalePirot]

Looks nice Barbie.

What does this do to your intake velocity? Does the car have any low end grunt or are you looking for high rpm only?

Lingenfelter told me to leave mine (Ling intake, runners and plenum) alone as my 406 would not benefit from porting and polishing.

 

[Barbie]

I'm just hoping this distributes the power band a little more evenly. Now that I've swapped to a ZZ4 it has much more bottom end torque, and I'm hoping it breathes a little more in higher rpm's.

I was really hoping to avoid one of the 3 rams and since I got the SLP's on sale, I figured what have I got to lose. If it doesn't work, it's Super Ram time!

Barbie

 

[-=Jeff=-]

I'm just hoping this distributes the power band a little more evenly. Now that I've swapped to a ZZ4 it has much more bottom end torque, and I'm hoping it breathes a little more in higher rpm's.

I was really hoping to avoid one of the 3 rams and since I got the SLP's on sale, I figured what have I got to lose. If it doesn't work, it's Super Ram time!

Barbie

You will not gain too much more Upper RPM with that set-up, mainly because it is still a Long Runner, Designed for more torque. If you want to spin to the higher RPM, I would go with a Miniram, besides the Miniram is much easier to install then the superram.