does anyone know that horsepower formula? also how hard is it to install aftermaket lsd. i want to do it on my b18b tranny. thanks

 

Answering the latter:

If you can follow instructions carefully from the service manual, you have patience and good measurement tools you should be fine. It is vital to remember HOW you took the transmission apart, ie: washer sequence, bolt types and locations, etc. Put it together the same way you took it apart.

I did an LSD install this spring. My mechanical knowledge extended to rebuilding small engines (lawnmower size) and various suspension work and audio systems on various cars.

I put my transmission together following the instruction for a particular spring washer (concave up when it should have been concave down) and 5th gear ate itself due to this. I remember how I took it apart and chose to reassemble it as the service manual showed. Bad idea.

You'll get to make those exciting decisions too. Good luck!

 

HP = torque * RPM / 5,252

 

thumbs up

 

so you should or shouldnt follow the manul? and i dont think that hp formula is very acutate, thanks anyway tho

 

ummm
the horsepower forumla is 100% accurate, dynometers don't measure horsepower, they measure torque. Horsepower is always calculated using that exact formula. Look at any dyno sheet - the torque curve and horsepower curve always cross at 5252 rpm

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ls95hatch &raquo;</TD></TR><TR><TD CLASS="quote"> and i dont think that hp formula is very acutate, thanks anyway tho</TD></TR></TABLE>


If you don't think that formula is accurate, look at any dyno and take the torque the engine is making, multiply it by the RPM then divide by 5,252. Bam YOU WILL have the accurate HP every time. Keep in mind HP is not an actual force, torque is, but HP is the rate at which that force can be applied.

 

i think that its because i was putting im my red line, its modifyed so its 9000. but i figured i am not making any power there any ways. so thats why i was such high numbers.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ls95hatch &raquo;</TD></TR><TR><TD CLASS="quote">so you should or shouldnt follow the manul? and i dont think that hp formula is very acutate, thanks anyway tho</TD></TR></TABLE>

You should follow the manual to the word. However, do remember how you disassembled parts (sequences, stacks of parts like the sychro assy, etc). Put them back together exactly how they came out. You will be playing with my favorite spring washer under the countershaft. Use baggies and label them to keep up with everything.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PupaScoopa &raquo;</TD></TR><TR><TD CLASS="quote">I did an LSD install this spring. My mechanical knowledge extended to rebuilding small engines (lawnmower size) and various suspension work and audio systems on various cars.

I put my transmission together following the instruction for a particular spring washer (concave up when it should have been concave down) and 5th gear ate itself due to this. I remember how I took it apart and chose to reassemble it as the service manual showed. Bad idea.

You'll get to make those exciting decisions too. Good luck!</TD></TR></TABLE>
That's not why it ate fifthh, gear, but it was a washer that caused it, a very large one

 

It was pretty big, maybe 40mm in dia. That is what ate 5th because the shaft was riding too high and pressed against the synchro hub. This caused excess heat to weld this to the end ring which sits against the large ring with the "ear."

 

taking pictures when taking the tranny apart helps alot too. so you can use as refrence of how it looks when you put it back together.

 

thats a good idea

 

The pictures may be a good idea. The thing is that this type of work is very detailed, so you'll be taking a ton of pictures. If all you're doing is an LSD swap, just keep the shafts, bearing and washers together exactly how they came out and you should be fine.

I also found it easier to shim the diff with the shafts out of the transmission (it closes up easy and comes apart easier to get the shims measured).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PupaScoopa &raquo;</TD></TR><TR><TD CLASS="quote">It was pretty big, maybe 40mm in dia. That is what ate 5th because the shaft was riding too high and pressed against the synchro hub. This caused excess heat to weld this to the end ring which sits against the large ring with the "ear."</TD></TR></TABLE>

Bet you had a liitle bit of a hard time getting the case back on huh? Take a look at that "ear" and take a look inside the case next time

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ls95hatch &raquo;</TD></TR><TR><TD CLASS="quote">so you should or shouldnt follow the manul? and i dont think that hp formula is very acutate, thanks anyway tho</TD></TR></TABLE>
lol the forumula is always right. lol. made me laugh though so thanks. lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by -KangaRod- &raquo;</TD></TR><TR><TD CLASS="quote">ummm
the horsepower forumla is 100% accurate, dynometers don't measure horsepower, they measure torque. Horsepower is always calculated using that exact formula. Look at any dyno sheet - the torque curve and horsepower curve always cross at 5252 rpm</TD></TR></TABLE>after reading this I looked at my dyno chart and it crosses at 6100rpm.....Hmmmmmmmmm.......John

 

I have three different dyno sheets, on three different motors, d16, b18b, and b16a, and just wondering if all of my torque and HP crossed about where John said..............and on all of my charts they cross so darn close to 5200-5300rpm, oh and my college physics book states 5252..........so Im just agreeing with John

 

Are you bein sarcastic? but in all seriousness it does cross at 6100......I'm not saying the formula is incorrect, i know it's right.......It actually almost crosses at 4800rpm, but then vtec hits at 5k and tq jumps straight up 29ft/lbs within 100rpm..................I dunno man, wierd ****, I need a scanner <TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18bgone &raquo;</TD></TR><TR><TD CLASS="quote">I have three different dyno sheets, on three different motors, d16, b18b, and b16a, and just wondering if all of my torque and HP crossed about where John said..............and on all of my charts they cross so darn close to 5200-5300rpm, oh and my college physics book states 5252..........so Im just agreeing with John</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h22John &raquo;</TD></TR><TR><TD CLASS="quote">but in all seriousness it does cross at 6100......I'm not saying the formula is incorrect, i know it's right.......It actually almost crosses at 4800rpm, but then vtec hits at 5k and tq jumps straight up 29ft/lbs within 100rpm..................I dunno man, wierd ****, I need a scanner </TD></TR></TABLE>
Your torque & horsepower probably aren't scaled the same on the graph.

 

not trying to be sarcastic, just wondering for myself, and posting what I found.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h22John &raquo;</TD></TR><TR><TD CLASS="quote">Are you bein sarcastic? but in all seriousness it does cross at 6100......I'm not saying the formula is incorrect, i know it's right.......It actually almost crosses at 4800rpm, but then vtec hits at 5k and tq jumps straight up 29ft/lbs within 100rpm..................I dunno man, wierd ****, I need a scanner </TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18bgone &raquo;</TD></TR><TR><TD CLASS="quote">I have three different dyno sheets, on three different motors, d16, b18b, and b16a, and just wondering if all of my torque and HP crossed about where John said..............and on all of my charts they cross so darn close to 5200-5300rpm, oh and my college physics book states 5252..........so Im just agreeing with John</TD></TR></TABLE>


It has nothing to do with 5,252 RPM. The formula is a standard for calculating HP, and 5,252 is simply a standard number for the formula.

Like I said, HP = Torque * RPM / 5,252.