New Mods in Progress

[DemonSVT]

I figured this forum could use some more mod pictures so I figured I would donate some...

This is after only 21k miles... Nasty!!!

The UIM is definitely still a bottle neck IMO.

Much smaller then the LIM or the heads intake ports.

~ Throttle Bodies

Stock 60mm TB on bottom / 65mm 4.6L TB on top
Both optimized.

I mic'd everything.

I'll give some before and after specs when I'm done... :-D

 

[dr svt]

your on top of your s--t i dig that .i tore my car down at 33k i was awed at sight its due for rework in may im sure i wont be let down. i take it
you have good acsess to machine shop or 1 or own one.
Bottle neck is an understatement.

 

[svt2000]

Originally posted by DemonSVT
I figured this forum could use some more mod pictures so I figured I would donate some...

This is after only 21k miles... Nasty!!!

The UIM is definitely still a bottle neck IMO.

Much smaller then the LIM or the heads intake ports.

~ Throttle Bodies

Stock 60mm TB on bottom / 65mm 4.6L TB on top
Both optimized.

I mic'd everything.

I'll give some before and after specs when I'm done... :-D

I will also be doing that work pretty soon. Have to wait until I get my other car running first. I the like the tb. Looks like the same one I am going to put on.

 

[Ryan]

Dayum...wish my engine compartment was that clean.....maybe this summer i can cleaner up

BTW demon what needs done for the 65 TB?? Something with the linkage right?

 

[DemonSVT]

For the 65mm to work.

You have to seal the air bypass port.
Cut off a throttle stop tab.
Rotate the linkage 180 degrees.
Enlarge the cable hole on the linkage.
Bend the long arm (and cover it) on the linkage to act as a throttle stop.
Optimize the crap out of it...

Probably something else???

 

[Ryan]

You had any dyon runs with your tb?? I know you like results...what did you see....stock csvts loose hp from it or not??

Originally posted by DemonSVT
For the 65mm to work.

You have to seal the air bypass port.
Cut off a throttle stop tab.
Rotate the linkage 180 degrees.
Enlarge the cable hole on the linkage.
Bend the long arm (and cover it) on the linkage to act as a throttle stop.
Optimize the crap out of it...

Probably something else???

 

[DemonSVT]

Have not dynoed with it on.

Have to put the car back together. Still waiting for parts to come in or come back...

I will be going to the dyno the second week in April. Getting my chip reprogrammed (finally more redline!!!) & S-AFC tuned as well.

 

[DemonSVT]

Before:

After:

New measurements:

Primary inlet: 33.5mm
Primary outlet: 33.5mm (+1mm) (port matched to 34mm)
Secondary inlet: 34.8mm
Secondary outlet: 34.4mm (+.4mm)

Head inlet ports
Primary: 34mm
Secondary: 34.4mm

I didn't worry about opening up the inlet of the LIM. I doubt the UIM outlets will even get as large as the LIM is now. (Dual Honed UIM was 30.5mm & 32mm respectively)
I'll know soon.

 

[Ryan]

what did you do that with? Dremel?

 

[DemonSVT]

Dremel and a drill press.