Jackaroo Exhaust Restrictors

Submitted: Friday, Mar 18, 2005 at 00:05
ThreadID: 21307 Views:4035 Replies:4 FollowUps:2
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Has anyone got experience in removing the exhaust restrictors in a 3.5L V6 Jackaroo to improve power and maybe fuel economy.? Does it help and if so what's involved? My Jackaroo is getting only 370klms in the bush, 430 around town and 470 on the highway, which is pretty bad. It could be just the way they are, but I'm willing to any simple mods.

Any advise is appreciated.
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Reply By: Member - Nobby - Friday, Mar 18, 2005 at 09:18

Friday, Mar 18, 2005 at 09:18
Blackjack, have a look in the Archives for info on this. There should be heaps there. About 6 months ago I think there was about 300 hits on the subject. I have had mine removed and I get more power but not much more fuel economy. Those figures you quote are about right. I get 500k highway and about the same as you around town. Nature of the beast I'm afraid.
AnswerID: 102881

Reply By: jackablue - Friday, Mar 18, 2005 at 11:30

Friday, Mar 18, 2005 at 11:30
Blackjack look here
link text
AnswerID: 102898

Reply By: Member - Bradley- Friday, Mar 18, 2005 at 17:40

Friday, Mar 18, 2005 at 17:40
i'm the originator of a few of these threads you will find in searching, the restrictors are there for nvh issues, so be prepared for a bit more noise.

Induction has more gains to be had than exhaust restrictors, again search here and on the link provided.

on standard tyres mine gave 13-14/100k bush, 12 on road, with 265/75 it gives 15 bush and 14-15 road. so mine is getting better than yours with the big tyres, and i dont take it easy :-).

But if you are running an auto then yes they really suck the juice.
AnswerID: 102945

Follow Up By: signman - Monday, Mar 21, 2005 at 08:59

Monday, Mar 21, 2005 at 08:59
G'day Brad,
Are the restictors in the joining pipe (I guess you could call it the Y pipe) or are they in the manifold pipes from the engine??
Are you aware if they are in the 3.2V6 Rodeo??
If they are in the Y pipe- any problems disconnecting the sensor to operate on the thing??
FollowupID: 360842

Follow Up By: Member - Bradley- Wednesday, Mar 23, 2005 at 21:49

Wednesday, Mar 23, 2005 at 21:49
ive seen 2 types, a penny washer style just forward of the y pipe joins in the engine down pipe, and a tapered cone style in the y pipe itself just aft of the front joins. In the rodeo, should be. oxy sensor - no probs, ignition off, unplug and do the mod, reinstall and re-connect sensor before turning ignition on, if not a fault code will be registered, but with in a dozen or so start cycles it will disappear.
FollowupID: 361171

Reply By: BlackJack - Friday, Mar 18, 2005 at 23:41

Friday, Mar 18, 2005 at 23:41
Jackablue - your link answered my question well.
It will be my next project.

Thanks for the info guys.
AnswerID: 103022

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