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**SVOeric** · 07-24-2002, 04:27 PM

Jim,

I dont think I have heard of anyone getting performance gains from going from a stock 86 SVO intake- to a stock 87-88 t-coupe intake. They are VERY close to the same part.

Also, I'm not sure if you noticed it, but the upper TC intake is shorter than the SVO, so you will either need to use a spacer, or swap valve covers as well.

As far as the computer goes, I'm not sure what you plan to gain, but in most cases, people consider the PE computer (what the 86 SVO has in it) to be the best. (less wires to hook up)
GT350R is the "local computer expert, and I'm sure he will comment, but from other conversations with him, I think the newer TC computer may be a bit faster, but they have almost identical fuel curves, and for the amount of effort involced , you're not going to see any real horsepower gains.

BTW: the sensor is a ACT, air charge temp sensor.. I dont think you need any more coolant temp sensors, but I may be wrong on that..

**jhawk** · 07-24-2002, 04:38 PM

svoeric is correct on the performance gians of the intake and computer. I doubt you would notice anything, but maybe a bit smoother idle.

The sensor on the 86 manifold is a temp. sensor used to turn on the fan.

jim

**SVOeric** · 07-24-2002, 05:55 PM

These same upgrades on a 85 SVO would make a difference, along with some 35# injectors.

I thought the SVO actually had a extra temp sensor (86 has 2, one in the center, and one on the bottom) on the intake, but youi would need to add a ACT for the year computer he is talking about.

Attached Files

**jhawk** · 07-24-2002, 06:17 PM

I have actually done this swap on my 84, and it did make a noticable difference. You are right you must install an ACT to run the 88 computer.

The problem is the 88 intake does not have a place for the temp. sensor that turns on the cooling fan(bottom sensor on svo intake). I believe this is the sensor he is talking about. I installed an adjustable fan controller when I did my swap.

The cooling fans were controlled by the computer in the later turbo coupes.

jim

**SVOeric** · 07-24-2002, 06:20 PM

ohhh.. duuuuu... sorry, I was thinking backwards!!

thanks!!

**jcwillis** · 07-24-2002, 06:36 PM

Hi SVOEric and Jhawk,
Thank you for the information because I do appreciate it.
I realize that the performance gains with this intake/computer are going to be minimal, if any. I have read that the idle, driveability, and possibly the mileage may improve by having the ACT sensor and accompanying LA3 computer handling the engine management chores.
Jhawk, Could you give me some more details about the adjustable fan controller? Is the only other option to drill and tap?
Jim

**SVOeric** · 07-24-2002, 06:40 PM

well, I did a review of the adjustable fan controler I installed on this site, just look under product reviews if you would like to look at it.

To see the better gas mileage, you are also going to need a VSS.
The VSS tells the computer the speed your car is running. You should be able to hook this up, but you will need the parts off the t-coupe transmission . Then you have another problem, and that is how to run your speedometer. The SVO has a mechanical speedo, and the TC has a electric (run from the VSS)

**GT350R** · 07-24-2002, 11:51 PM

Sounds like you got your answers.

For improved gas mileage you really going to want to also hook up a VSS sensor. Basicly it just snaps between your speedo cable and the tranny , then you run the wires to the computer. your car being an 86 might already have one, you would just have to pull the red plug out of the hole for the wiring connector.

Another fix for the fan sensor is to use the peice of pipe from an XR4Ti intake. What it does it use a "T" pipe fitting between the lower intakes coolant hose and the lower intake, so that you can place the fan turn on in the same stream of coolant that is going through the hose. Map might be able to shoot you a picture of his set up if you PM him.

**Pro-Hawk** · 04-15-2004, 11:34 PM

Originally posted by SVOeric
These same upgrades on a 85 SVO would make a difference, along with some 35# injectors.

I thought the SVO actually had a extra temp sensor (86 has 2, one in the center, and one on the bottom) on the intake, but youi would need to add a ACT for the year computer he is talking about.

Hey SVOeric I was running a search on intakes when I ran across the pic you had attached to this post. What is the sensor located near the top on the fire wall side? It looks like the hole where the dip stick is bolted to has been drilled out for some kind of sensor. What I'm looking for is a place to drill a ACT sensor on the lower square intake(s) I'm installing on my older 85 SVO. I was thinking of putting the ACT just below the sensor I'm asking about. On the lower intake under where the dip stick bolts to is a flat spot that looks like a good place to drill for the ACT sensor.

Thanks for your help.

**notopstang** · 04-16-2004, 01:46 AM

knock sensor

That's the knock sensor.

On cars that came w/an ACT, it was installed on the bung just below the KS in that picture. On the intake, its just below and towards the block.

Not sure where the dipstick's supposed to bolt.. mine has never been bolted to anything!

--Javier

**Pro-Hawk** · 04-16-2004, 02:01 AM

Re: knock sensor

Originally posted by notopstang
That's the knock sensor.

On cars that came w/an ACT, it was installed on the bung just below the KS in that picture. On the intake, its just below and towards the block.

Not sure where the dipstick's supposed to bolt.. mine has never been bolted to anything!

--Javier

Hell I maybe more lost now, but whats new lol

Does a KS screw into a dead end hole? Because the place that sensor would bolt on my lower is a dead end hole about 1" deep and looks like a 1/2 -3/8 bolt fits it.

When you say bung I got a flat spot about 2 inchs long and a inch wide just a hair under that sensor I'm talking about is that where the ACT goes?

Sorry about this but if I don't have a ACT place I need to drill it now while I have them out porting on them

**GAboySVO** · 04-16-2004, 02:44 AM

The knock sensor is a dead end hole as you described. When installing the knock sensor, make sure you torque it to the proper setting. I forget what it is now, but you can do a search as it has been discussed before.

If your intake is not off of an '87 or later 2.3L turbo engine then it most likely does not have the ACT sensor hole drilled and tapped in it and will need to be added while you are having the porting done.

**notopstang** · 04-16-2004, 03:10 AM

GAboySVO is right, the knock sensor goes into the dead end hole. That flat spot spot just below where the KS goes is where you should drill/tap for the ACT if a holes isn't already there.

There's a pic on this forum somewhere that shows where all the sensors go... of course, now, I can't find it. here's one that's not as good, but is another perspective:

http://www.angelfire.com/wa3/fastest4d/act.html

--Javier

**lonchair** · 04-16-2004, 07:04 PM

Originally posted by SVOeric

....Also, I'm not sure if you noticed it, but the upper TC intake is shorter than the SVO, so you will either need to use a spacer, or swap valve covers as well....

That's not exactly true. I'm not sure how, but Don (Cobra 0478) was able to defy the laws of physics and put a TC upper on his car with the STOCK SVO valve cover in place and did NOT use a spacer. I believe the throttle body he used was off a TC as well. Granted things were REAL TIGHT, but we mounted it using only 2 gaskets and the car started and the throttle had enough room to move as it needed to. Since then he made va spacer for it cause stuff was too close for comfort, but none the less, the throttle body worked with out a spacer.

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