86_GXL

Are there throttle body spacers for an rx7? or if there aren't would it even be beneficial to have one made? I know they make a pretty big difference on a Honda, but wasn't sure?

hondaturbo2

sorry to burst your bubble man but throttle body spacers do nothing on a fuel injected car.. .maybe a seven but forsure NOT a honda.. They work best with carbs where it gives the fuel more time to atomize with the air, Our throttle bodies are nothing but butterflies controling the air so spacing that is about as usefull as making your intake pipe longer

Tech_Greek

So, here's an interesting question, what about injector spacers? I assume the throttle body spacer works good for carbs because of the long path it takes for the fuel.

RETed

Since when?


-Ted

86_GXL

Everyone around here uses them, and i've ridden in the same car before they got one, and then after and i could tell the difference.

Agent_D

iTrader: (2)

it could do something, altering the intake air path can be beneficial, whether or not its accomplished with a spacer is another thing.

Tech_Greek

WRONG THREAD

NZConvertible

No, you think you noticed a difference. If increasing power and economy was as simple as moving the TB a bit, that's how it would come from the factory. Do you factory engineers are that dumb?

RETed

Wow, I think you need to go see a psychiatrist?
Seriously, your psychological assestment of perceiving a gain in power / performance is pretty exaggerated.

Get the car on a dyno and prove us wrong...


-Ted

rxspeed87

sorry to dig up and old thread but do you really want the answer to that one?

rxspeed87

it could in theory make a litle more power with the whole resonance effect but the effect should be fairly small. I would say not enough tobe noticable
so I do agree with reted heree

NZConvertible

Please don't make a fool of yourself by saying the answer is yes...

rxspeed87

factories have done some stupid stuff over the years. in a way maybe it isn't all because of the engineers but the penny pinchers but still some ideas aren't the greatest or lack of ideas.

I'm sure you can find some of your own ideas on that one :-)

Icemark

Okay for everyone not understanding Throttle body spacers:

Throttle body spacer 101

Throttle body spacers (if they work- most don't) simply relocate some of the torque band, but do nothing to increase power.

So the perceived increase in power is just because you lowered the start and peak of the torque curve slightly. For example on our car, think if peak torque was moved down to 3000 RPM instead of 3800 RPM. It would feel faster, but run out of torque at 5000rpm instead of 6000 rpm.

This is why you think that there is more power and the reason that factories don't generally put them in.

In a few vehicles there are also other intake issues that the throttle body spacer addresses.

For example in some Toyota and GM product, the gasket design for the throttle body has a lip that is placed in the path of air for noise reasons. The factory is willing to sacrifice a couple of HP at top end to lower the noise of the intake at lower RPMs (where the engines are used the most). In this case simply replacing the gasket with one that does not have the lips that stick into the air flow path, does net some additional power, but that additional power would be the same regardless of if there is a spacer or not. Generally the spacers come with gaskets that have that lip already removed… making it seem like there is now more power when it is installed.

GUZZLR

take a look at the 26B motor , it has variable length intake runners which work on the same concept as stated above by 'icemark'.