Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: scrw on August 13, 2011, 06:27:42 PM

Title: WJ Throttle body rebore & TB spacer
Post by: scrw on August 13, 2011, 06:27:42 PM
The Grand is getting spoilt this month, treated it to a TB spacer & TB rebore today. IRO don't list thier TB spacer as fitting the WJ but I thought I would give it a try.

First of rebore the tapered TB to match the spacer, there was a handy line of crud marking out where to bore out to, did so using abrasive flap wheels on a drill.

(https://birtydastards.com/frm/proxy.php?request=http%3A%2F%2Fi457.photobucket.com%2Falbums%2Fqq300%2Foffroading%2FJeep%2FIMAG0657.jpg&hash=9aa8bf411da8ff5388c7efee8a970b85ee53007d)

Spacer stopping me dropping crap in the manifold
(https://birtydastards.com/frm/proxy.php?request=http%3A%2F%2Fi457.photobucket.com%2Falbums%2Fqq300%2Foffroading%2FJeep%2FIMAG0658.jpg&hash=34133da9781ac80ec09d964af51650253382a793)

strip off all the sensors from the TB and remove the throttle butterfly, DON'T bore out where the butterfly sits.

(https://birtydastards.com/frm/proxy.php?request=http%3A%2F%2Fi457.photobucket.com%2Falbums%2Fqq300%2Foffroading%2FJeep%2FIMAG0659.jpg&hash=a649ef6fc29ef0455da5ce90e8c50930506710cb)

spacer fitted

(https://birtydastards.com/frm/proxy.php?request=http%3A%2F%2Fi457.photobucket.com%2Falbums%2Fqq300%2Foffroading%2FJeep%2FIMAG0660.jpg&hash=72a91dabf1e5258bfdd3b3416a25952709f2741f)

I bent back the cable bracket to take the new slack out of the cables, this is the before shot:

(https://birtydastards.com/frm/proxy.php?request=http%3A%2F%2Fi457.photobucket.com%2Falbums%2Fqq300%2Foffroading%2FJeep%2FIMAG0661.jpg&hash=20007d4f6439704de1fbb5e7eb1fdee88e39be1e)

The airbox is a VERY tight fit, I may need to trim the sound deadening material if it works the airbox loose, it clears the hoses though.

(https://birtydastards.com/frm/proxy.php?request=http%3A%2F%2Fi457.photobucket.com%2Falbums%2Fqq300%2Foffroading%2FJeep%2FIMAG0662.jpg&hash=bda2bce0105c8d28724cdc3e859d8b303066acc6)

All done, it JUST touches the sound material on the bonnet, may need trimming.

(https://birtydastards.com/frm/proxy.php?request=http%3A%2F%2Fi457.photobucket.com%2Falbums%2Fqq300%2Foffroading%2FJeep%2FIMAG0663.jpg&hash=c8683497cadb9465bfa9294de086ffdb7693a743)

Just need a longer bolt and a tube spacer to be able to bolt up the side bracket on the airbox
(https://birtydastards.com/frm/proxy.php?request=http%3A%2F%2Fi457.photobucket.com%2Falbums%2Fqq300%2Foffroading%2FJeep%2FIMAG0664.jpg&hash=7b207fd2b44578f55ba49e0f859b0be03f21393b)
Title: Re: WJ Throttle body rebore & TB spacer
Post by: scrw on August 13, 2011, 06:53:13 PM
Well that worked, much better pickup & more power under 2500rpm. Off on my usual long run to work monday so will see if it makes a difference to the MPG  :steeringwheel:
Title: Re: WJ Throttle body rebore & TB spacer
Post by: gazjeep on August 13, 2011, 08:24:43 PM
Good write up Steve  :icon_winkle:
Title: Re: WJ Throttle body rebore & TB spacer
Post by: Green Jeep on August 14, 2011, 11:55:10 AM
Looking good, is this a swirl type?
Title: Re: WJ Throttle body rebore & TB spacer
Post by: scrw on August 14, 2011, 12:02:51 PM
nope, swirl ones are a waste of time anyway
Title: Re: WJ Throttle body rebore & TB spacer
Post by: Delk on August 16, 2011, 08:07:27 AM
You may get some whistling noise at part throttle. This can be fixed by grinding a few groves in lower passage for the idle air bypass just below the throttle plate.
Title: Re: WJ Throttle body rebore & TB spacer
Post by: scrw on August 17, 2011, 04:37:46 PM
got 30 more miles out of a tank of LPG on the first fill up, may get more but one has been a bit lead footed since doing this  :steeringwheel: