Topic: throttle body spacer, (Read 7770 times)

brendjill · « **on:** January 28, 2009, 10:25:27 PM »

anybody tried these - do they do anything for your MPG ?

MOCAJ · « **Reply #1 on:** January 28, 2009, 10:32:24 PM »

got them fitted to 2 of our our tj's

make a difference but no more mpg

sound good though and can shock a few of the local maccies boys :wink:

brendjill · « **Reply #2 on:** January 28, 2009, 10:33:33 PM »

how so

MOCAJ · « **Reply #3 on:** January 28, 2009, 10:45:20 PM »

errrrrrrrrrr,

more acceleration

brendjill · « **Reply #4 on:** January 28, 2009, 10:50:27 PM »

shock...

does it improve acceleration or just make noise

Bishops Finger · « **Reply #5 on:** January 28, 2009, 10:55:44 PM »

Acceleration and a bit of a power arse kick in certain situations... :wink:

scrw · « **Reply #6 on:** January 29, 2009, 05:42:58 AM »

they alter the torque curve of the engine

JamesH · « **Reply #7 on:** January 29, 2009, 10:52:38 AM »

they make a nice sound but that's about it IMO :wink:

greggmo · « **Reply #8 on:** January 29, 2009, 05:55:02 PM »

i think they do do somethin but it aint gonna send the dyno off the scale and its a jeep and it is shit on fuel

isle of man · « **Reply #9 on:** January 29, 2009, 06:12:03 PM »

Yes they work - the price could be 5p or 5pound Hesco has the best in my humble opinion it's about the Lang's and groves - swirl action - and no it's not a lap dance move!!!!!

Bubba · « **Reply #10 on:** January 29, 2009, 07:34:19 PM »

they work better fitted upsidedown :wink:

wazza · « **Reply #11 on:** January 29, 2009, 09:11:54 PM »

i'f you've got a 4ltr, just get your local machine shop to boar the whole throttle body out to 60mm

if you look at it, the top half befor the butterfly is already 60mm but just after the butterfly it necks down to 55mm - its this bit you need to boar out!

ive hear'd thats a better solution than the spacer but ive also heared about people boaring both out an having beter results from it!

personally i'd go for just the TB first!!!

scrw · « **Reply #12 on:** January 30, 2009, 09:15:16 AM »

you can diy the tb with a 65mm flapwheel on a pillar drill
done quite a few like that

dxmedia · « **Reply #13 on:** January 30, 2009, 11:30:18 AM »

I thought that the reason they got narrower was to create a venturi effect which accelerates the incoming air into the plenum / inlet, which has more effect than boring out the throttle body.

If you bore out the ventui your get a great placibo effect, but you'll also slow the air down going into the inlet.

Why dont the OEM's fit these?

Panic mechanic! · « **Reply #14 on:** January 30, 2009, 11:45:14 AM »

Quote

I thought that the reason they got narrower was to create a venturi effect which accelerates the incoming air into the plenum / inlet, which has more effect than boring out the throttle body.

this is how a normal carb works , the venturi help the air draw the fuel into the air stream and helps mixing it, on a fuel injected engine the throttle body is just used to meter the air that flows thru it, the fuel being injected straight into the engine so hence it doesn't do anything other than control air flow. It tends to be set at a diameter that allows for better mpg. the act of opening up the throttlebody will merely allow the engine to suck in more air and create more power, where you have to be careful is it tends to create more power higher up the rev range and leaner running in the lower rev range.

JamesH · « **Reply #15 on:** January 30, 2009, 11:45:58 AM »

Removing the taper affects the off-idle response and the idling of the engine. There was quite a discussion on the Hesco forum about this a year or 2 ago. Larger throttle bodies (not bored standard ones) only really have benefit at the high rpm range of the 4.0l which isn't where most people drive them.

The throttle body spacers don't do a great deal, most manufacturers now would just tune the inlet manifold better rather than fit a spacer. The change in torque curve might reduce peak numbers (generally measured at higher rpm) so on paper it may even look like a reduction in performance, even if it feels better to drive.

Saying this, I have a Hesco one fitted to my 4.0l :roll:

mack · « **Reply #16 on:** January 30, 2009, 12:00:04 PM »

What about fitting an induction kit?

Would that be of any 'benefit' ?

wildwood · « **Reply #17 on:** January 30, 2009, 12:14:04 PM »

After 10 years of 'fiddling about' and watching mates doing the same we seem to have come down to the same answers with regard to 'helping a 4.0 litre lump'...............

Bloody great induction tube and the largest air filter in the cleanest coolest path of air. Keep the tube short as well.
Turbo city do good ones along with others.
Free flow exhaust box, does't have to be expensive or stainless or unobtainium, just to help the buggar breath. Lose the cat if you can??!

All the rest is cash down the dunny, or the equivalent of a chav taking his nova to halfrauds.

Just my opinion of course.

greggmo · « **Reply #18 on:** January 30, 2009, 09:31:39 PM »

Quote from: "mack"

What about fitting an induction kit?

Would that be of any 'benefit' ?

yup great for performance but a snorkel is a must if ya gonna do lots of off roadin really.

Bishops Finger · « **Reply #19 on:** January 30, 2009, 09:46:17 PM »

Must say disagree...snorkles good for water or dust.....after that why???

greggmo · « **Reply #20 on:** January 30, 2009, 09:50:47 PM »

errrr water dust mud cool air. i think it better to have a snorkel than hydraulic an engine. just a bit of safety if ya know what i mean.

dxmedia · « **Reply #21 on:** January 30, 2009, 09:53:27 PM »

I've an induction kit fitted, brilliant. At the moment I'm not planning on a snorkel, and I took the stock height ZG through corwen and Strata Florida with no issues.

Unless your planning on driving through lakes at P&P sites, I personally don't see the benefit of a snorkel

greggmo · « **Reply #22 on:** January 30, 2009, 09:59:41 PM »

if you stop in the water for some reason or you nose into somethin a bit sharp a splash is all it takes to scrap the lump. i aint sayin ya gotta have one but i just think it is one less thing to worry about. 8-)

dxmedia · « **Reply #23 on:** January 30, 2009, 10:27:46 PM »

heh, and a new engine is cheaper than a propper snorkel

Lornaben · « **Reply #24 on:** January 30, 2009, 10:35:26 PM »

Quote from: "greggmo"

if you stop in the water for some reason or you nose into somethin a bit sharp a splash is all it takes to scrap the lump. i aint sayin ya gotta have one but i just think it is one less thing to worry about.
I have no intention of going that deep in water but before I fitted one I had managed to get water and mud into the airbox. Only good fortune and a paper filter stopped it trashing my engine

Author Topic: throttle body spacer, (Read 7770 times)

brendjill

brendjill

brendjill

Bishops Finger

scrw

wazza

scrw

dxmedia

Panic mechanic!

mack

Bishops Finger

dxmedia

dxmedia