I'm aware that TB spacers are dissed heavily, and it seems like the "vortex" (ie. spinning air) design makes little sense for our cars, but after driving with my ported TB and doing a fair amount of web research, including finding the below thread (Honda si), I'm interested in giving a smooth bore TB spacer a try.

http://www.8thcivic.com/forums/bolt-...o-numbers.html

Since I haven't stumbled across one yet, I thought I'd ask if anybody else had. Know of any?

 

did you remove the coolent hoses from the throttle body? that will make a definate improvement as well. I took one hose off completely, then took the other one and put it on the nipple of the one I removed.

 

Never heard of removing the coolent hose from the TB...What's that supose to do, and will that effect the cooling of the tC at all?

 

Shouldn't affect the cooling of the tC, but it will disable the de-icing function of the TB. I guess, in most U.S. States, the temperatures never get low enough for TB icing to be a serious concern (guessing Montana is one of the exceptions). Disconnection of the TB coolant lines lowers the TB operating temperature and hence the ingested air temperature. Cooler air translates into denser air and hence more combustion expansion.

 

kinda defeats the purpose of a "cold" air intake with coolant heating up the air as it passes through the TB, found out this trick when I had my eclipse.

 

Well haven't run across any smooth bore TBS for our engines, but I'm curious about the Designed Chaos and House of Billet 2AZ-FE TBS offerings. If anybody has experience with either, I'd appreciate you sharing !

Thanks -- Trevor

 

Okay, whats all this about removing the coolant hose = increased performance?

and, how do you do it?

 

Just be sure to put them back in the winter if you live in a cold state like me.

 

The TB has four small hoses connecting to it. The two that connect to nipples very close to each other at one corner of the TB carry coolant. How you block them off is up to you. Will you notice a difference? No idea !

 

Decendants spacer is smooth bore. The real question is has anyone actually dyno'd or testified to a spacer doing anything on our cars?

 

why dont you guys post up a diy with pics so that everyone gets this correct when they do it.

 

Oh, really! Thanks for pointing that out, I'll check into it.

The key question to me on the spacers is whether there is an advantage to having greater flow uniformity when the post-throttleplate air gets to the plenum. Since flow uniformity seems to help everywhere else in the system (except probably where the fuel is injected -- turbulance can be helpful there) I'm suspecting the answer is yes. If so, the extra post-TB distance provided by a smoothbore spacer and the squeeze and release provided by the others can potentially all contribute to flow uniformity.

That's why I find the spacer concept interesting, the right one may well be beneficial.

 

This is the only Descendant I've been able to find and I don't see a TB spacer listed. Can you give me a further hint?

http://www.descendant-racing.com/

Thanks