Dual exhaust on an '84?

[XaeroSavvy]

Would splitting the exhaust on an '84 be a good idea? I've already got the full 3" piping, but I want the duals. Suggestions, recommendations or bad ideas?

[StefRobrts]

As I understand, the 84 has a second fuel pump which would have to be relocated to put duals on, otherwise it's too close to the pipes. Do a search and you'll find discussion of this. Most people seem to go to a single in-tank pump instead of the original two pump system.

I've been considering doing the same change to my 84.

[XaeroSavvy]

Yeah, I know the whole thing about the fuel pump. I'm ready to change that IF I do the duals. I'm just wondering about the performance issues.

[svobud]

purely for aesthetics - no performance gains over a single 3".

[svobrown]

Agree with Bud. Boy it sounds good but more weight and extra work on the fuel lines.

[XaeroSavvy]

Yeah, I'm trying to go for the sound, and with looks. I really just don't like how the single exhaust looks on a fox. But I was looking to getting a stronger, single in-tank pump anyway, for when I start with the engine.

EDIT: Heh, 1000th post in the exhaust forum. ^^

[AT6svo]

My 84 w dual exhaust...

I am one of those guys whom enjoys the aesthetics of symmetry. I just had a dual exhaust installed on my 84.

You can see the pics here:

http://www.svoca.com/forum/showthread.php?s=&postid=60916#post60916

Enjoy.

[XaeroSavvy]

I noticed you even went so far as to take off your mufflers. Now, that I've been wondering is, taking off so much in the exhaust system, wouldn't the lack of back pressure affect the spooling of the turbo negatively? I know when I bought mine, it had a test pipe on it, and the turbo had quite a bit of lag to it. So I put the cat. back on, and noticed that the turbo did in fact spool up faster. I would like to go without mufflers, but I'm just wondering how that would affect the overall performance.

[AT6svo]

I did not notice any performance degradation of any sort, if any its more like across the board improvement. I think most will people will agree that less backpressure is benefical to spool up time, not the converse as you describe.

Prior to this system, I was running the stock DP, stock cat, a exhaust dump before the rear axle.

Even with the tail-pipes out back the car is still somewhat loud in the cabin but much better than when it dumped and resonated under the car. W/o mufflers there is plenty of clearance for the fuel pump & filter on the frame rail. I can always add the Dyno-Max "bullet" style mufflers in this configuration too.

Ymmv,

[svobud]

Originally posted by XaeroSavvy
I noticed you even went so far as to take off your mufflers.

He still has a catalytic converter in place though. I'm sure that offers quite a bit of backpressure as well as noise reduction.

[XaeroSavvy]

So you're saying that if I go mufflerless, then I won't even have to relocate the fuel pump and filter? Oh god.. Nice..

[svobud]

Originally posted by XaeroSavvy
So you're saying that if I go mufflerless, then I won't even have to relocate the fuel pump and filter? Oh god.. Nice..

I wouldn't suggest that! Do it right and relocate it. Combustion is not your friend in this case.

[Erics SVO]

I've got a whole how-to from SVOMikey (anyone seen/heard from him lately?) I think I have it in my e-mail files. Give me your e-mail and I'll send it to you! He did the whole nine yards, fuel pump/lines and the brake line.

-Eric

[svobud]

Originally posted by Eric's SVO
I've got a whole how-to from SVOMikey (anyone seen/heard from him lately?)

Yeah - he's living on the South Pole. SERIOUSLY

[XaeroSavvy]

point taken. and my e-mail is spyderxero137@bellsouth.net