question about low/top end gain
07-10-2002 | 01:27 PM
#1
question about low/top end gain
when people say you get more low end back, or you get more high end back, what exactly is meant by that? for some reason, it just clicks in my head that top end means when your going faster, you get more gain there, and when your going slow, thats low end.....but to be corrected, top end gain means gains at higher rpms in all gears, and low end is gains in low rpm in all gears, correct? thanx for putting up with the ignorance 
07-10-2002 | 02:14 PM
#3
Member
Joined: Apr 2002
Posts: 91
I thought it was rpm
low end power to me always meant power id recieve at the lower portion of my rpms. High end power i wass lead to believe as power youd recieve in the upper rpms. For instances with headers on my 87 supra I recieved more torque in my higher rpms meaning more highend power. When I bored out my engine I recieved more power off the line meaning more low end power. I never applied it to speed because thats when gearing came to play. Like 4th versus 5th for 85 mph.
07-10-2002 | 02:31 PM
#4
i always thought it was rpm related too...never thought speed was in the picture 
you can do 80mph in 3rd and be close to redline (high-end for rpms) or do 80mph in 5th and be between 3-3.5k rpm (low/mid range for rpms)
you can do 80mph in 3rd and be close to redline (high-end for rpms) or do 80mph in 5th and be between 3-3.5k rpm (low/mid range for rpms)
07-10-2002 | 04:37 PM
#7
Senior Member
Joined: Jun 2002
Posts: 372
by the engine at low speed
the "engine speed", i.e. the speed the engine is running at, which is measured in revolutions per minute(RPM), you must be confusing my explanation's refernce to "engine speed" as the speed of the vehicle itself.
the "engine speed", i.e. the speed the engine is running at, which is measured in revolutions per minute(RPM), you must be confusing my explanation's refernce to "engine speed" as the speed of the vehicle itself.
07-10-2002 | 05:00 PM
#8
Senior Member
Joined: Jan 2002
Posts: 2,007
Originally posted by slammed95
The y-pipe makes a noticable difference in power from 3000 to about 6300 rpm's. For some reason, at least in my car, it's a big difference between 2900 and 3000 rpms. Feels like when my friends S2000 hits the vtec point.
The y-pipe makes a noticable difference in power from 3000 to about 6300 rpm's. For some reason, at least in my car, it's a big difference between 2900 and 3000 rpms. Feels like when my friends S2000 hits the vtec point.
07-10-2002 | 08:59 PM
#10
Originally posted by slammed95
You must not have a 4th gen or you're misinformed. 4th gens have no variable valve timing at all.
You must not have a 4th gen or you're misinformed. 4th gens have no variable valve timing at all.
you can feel it sometimes if you pay attention rom 3000 rpm to 4000 rpm you can feel a slight jolt in power. (correct me if I'm wrong but I feel it in my 5 spd under wot)
07-11-2002 | 08:48 AM
#11
Senior Member
Joined: Jan 2002
Posts: 2,007
Originally posted by slammed95
I have had my engine apart with the timing chain covers off, cam sprockets off and valve covers off. The cams are solidly mounted to the sprockets. Also the intake and exhaust cam sprockets are connected by small chains. There are no mechanisms to alter valve timing anywhere.
I have had my engine apart with the timing chain covers off, cam sprockets off and valve covers off. The cams are solidly mounted to the sprockets. Also the intake and exhaust cam sprockets are connected by small chains. There are no mechanisms to alter valve timing anywhere.
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