1G Throttle Body on a 2G |
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| The 1G throttle body has a wider diameter than the 2G TB. Check out http://www.roadraceengineering.com for additional pictures and information, including a fix for the Check Engine light. This page will show some pictures from my install on a 95 GSX. Also, check out the VFAQ at http://www.vfaq.com. This is designed to compliment the VFAQ. | |||
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First step is to remove the current throttle body. Leave all the vacuum hoses in the little holder to prevent mixing them up. You'll want to remove the UIC hose and the battery. If you have cruise, you'll need to loosen the black box from the firewall in order to get the TB out (assuming you leave the 2 studs in. | ||
| Comparing the two TBs, the 1g (the dirty one) is clearly larger. Make sure and clean it some before putting it in. You'll also need the gaskets. |  |
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Here's why you clean it. Yuck. Some people install a EGR (exhaust gas re-circulation) block off plate to prevent exhaust gas from being fed into the TB. This doesn't work on the 2G because it will trigger your check engine light (unless you have DSMLink). Also, if you use an old throttle body, you should consider replacing the shaft seals and the BISS O-Ring. | ||
| Put on the 1G TB gasket and mark the area to be ported out. |  |
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As in the VFAQ, put rags in the plenum to keep the metal flakes under control. You may also want to put a newspaper under the work area. Using a dremel and bit number 115 (high speed cutter) worked well for porting. After your done, carefully vacuum out as many metal chips as possible. We attached a toothbrush to the shop vac to help sweep out chips. | ||
| Using new vacuum hose, hook up the new hoses as shown. You'll need a vacuum cap for the 4th 1G TB vacuum port. Check out RRE for the better way to hook up these hoses. |  |
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| Return to the Eclipse Page. | I believe that my gas mileage has gone down since installing this and my front mount intercooler. It's probably flowing more air for a given throttle position sensor reading and the ECU freaks out and runs things rich. Having fuel management should help. This TB will definitely flow more air. You may want to custom fabricate a better TB elbow, since it's somewhat smaller diameter than the TB, but the 2G elbow is still much better than the 1G elbow. | ||
