shift points?
07-29-2002, 04:57 PM
#4
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I lose power at the red line. Does this mean I have somthing wrong with my car? I get most of my power around 3500 to 5000 rpm. Thats when I shift it gives me best resluts so far. 95 LS
07-29-2002, 05:26 PM
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no thats pretty normal for an LS. The GSR has vtec and secondary intake runners. The vtec system engages different cam profiles which allow the engine to breath more air more efficiently. The vtec cam leaves the intake and exhaust valves open longer which lets the engine breath more air in. This happens at 4400 RPM in the GSR, at 5800 RPM in a GSR secondary intake runners open up which lets the engine ingest more air. Its these two things which allow the GSR engine (B18c1) to make power at redline.
the B18b engine does not have a vtec cam or a secondary intake runner (im pretty sure but did not double check that fact), so when your at redline the engine is trying to ingest all this air but it cant get the air out of the engine fast enough and you start to lose power. The Type R engine (B18c5) uses even wilder cams and a higher redline to inhale more air and make more power. It also has alot of other cool stuff that lets it make all that power but its not important to mention it right now =)
the B18b engine does not have a vtec cam or a secondary intake runner (im pretty sure but did not double check that fact), so when your at redline the engine is trying to ingest all this air but it cant get the air out of the engine fast enough and you start to lose power. The Type R engine (B18c5) uses even wilder cams and a higher redline to inhale more air and make more power. It also has alot of other cool stuff that lets it make all that power but its not important to mention it right now =)
07-29-2002, 06:07 PM
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I usually shift a little north of 8000 rpm and if I'm really feeling lucky and aggressive, I'll shift at 8500 rpm each gear. Just so long as the revs don't drop below 6000 and fall out of VTEC, I'll still pull hard. I think you've guessed that my car's an Integra Type R 
07-29-2002, 07:11 PM
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wow, this site keeps surprising me.
to find the correct point to shift, you need to dyno your car in every gear. You also need to take note of how much your revs drop when you shift.
you match everything up, and you will see that quite often, you make more power at lower rpm in a higher gear.
to find the correct point to shift, you need to dyno your car in every gear. You also need to take note of how much your revs drop when you shift.
you match everything up, and you will see that quite often, you make more power at lower rpm in a higher gear.
