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LS Trans slowing my GSR down?


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YellowITR479
04-23-2004, 07:40 AM
Anybody know the negative and positive affects of having an LS tranny on a B18C1? My car came with the tranny allready on it, I think the tranny is what makes my car feel not as fast as it should be. The car stays in VTEC when I shift at the redline. 1st gear is like 45, 2nd is like 66, 3rd is 90 ( wicked gear, lol ), 4th is 125 and Redline is past 150. My R was kinda the same but felt like the gears went much faster and she was basically stock.

911S_TARGA_RSR
04-23-2004, 07:45 AM
It is quite possible!

Crippy
04-23-2004, 10:01 AM
the ls tranny can only rev to like 61/2 grand if im correct ... the gsr redlines at 8100 , so yea its draggin you down buddy, my gsr gets a real kick in the ass at about 7 grand

Ricochet
04-23-2004, 10:04 AM
The LS tranny has taller gears than the c1. The c1 tranny is a bit more closer-ratioed, keeping you right around peak power when shifting to redline. Question, when you shift at redline and punch it into the next gear, will you be above vtec engagement or below it?

Crippy
04-23-2004, 10:40 AM
who are you askin ?? him or me ??

Ricochet
04-23-2004, 10:43 AM
who are you askin ?? him or me ??
YellowITR, sorry.. should have quoted him.

andera
04-23-2004, 11:29 PM
the ls tranny can only rev to like 61/2 grand if im correct ... the gsr redlines at 8100 , so yea its draggin you down buddy, my gsr gets a real kick in the ass at about 7 grand

lmao.

http://www.ebaumsworld.com/forumfun/newbie7.jpg

DeleriousZ
04-24-2004, 04:06 AM
man andera you're just stealin and postin stuff from ebaum's everywhere.. if you're not going to say something productive.. don't use up bandwidth

jcrx
04-24-2004, 05:39 AM
man andera you're just stealin and postin stuff from ebaum's everywhere.. if you're not going to say something productive.. don't use up bandwidth
Agreed,

Andera, if you aren't going to give an answer, than dont post a damn picture indicating you have some insight over someone that is new.
As for the Crippy, trannys don't "redline", motors redline, transmissions run out of gearing, which I guess you could call redline, but it is not quite the same.

YellowITR479
04-24-2004, 08:49 AM
Ricochet, the answer to your ? is in my ?, but ill answer it for you anyway just because you are a " fanatic ". I wouldnt say the car stays deep in vtec when I shift like my R did, but if I shift at 8,000 the car is 100 or 200 rpm into vtec. Can I stuff an Type-R gear set into that tranny case?

andera
04-24-2004, 11:09 AM
Agreed,

Andera, if you aren't going to give an answer, than dont post a damn picture indicating you have some insight over someone that is new.
As for the Crippy, trannys don't "redline", motors redline, transmissions run out of gearing, which I guess you could call redline, but it is not quite the same.


if they're new and dont know the answer they shouldnt post like they know wtf is going on and like they know waht they're talkin about. it also doesnt sound lik you know what you're taklin about. "transmissions run out of gearing"? Elaborate for us all. nuff said about that!

yellow itr
you shoulndt have an LS tranny because it's gonna drop you out of the power band after shifting, and you'll run through the gears slower... here's the equation to see what rpm you'll fall to after a shift at redline

redlinerpm * (nextgear/currentgear) = landing point... here's a GSR

1st : 3.230
2nd : 1.900
3rd : 1.360
4th : 1.034
5th : 0.787

so
8000 * (1.9/3.23) = 4705 rpms from shifting 1st -> 2nd.
8000 * (1.36/1.9) = 5726 2nd -> 3rd.
8000 * (1.034/1.36) = 3rd -> 4th 6082
8000 * (.787/1.034) = 6088

here are the gear ratios for the LS tranny (you can do the math and see one of the reasons why its slowing down your GSR)

3.23
1.9
1.269
.966
.714


the gsr's power band is higher in the rpms range (and nowerer) hence the shorter tighter gears.... the LS's power band isnt as high and is a bit broader which is why it has taller gears. if i were you i'd just get an ITR tranny with the LSD already in it

here's its gearings fer that....

3.23
2.105
1.458
1.107
.848


that or a GSR transmission is the best upgrade you can do for your car right now. you'll see better results with it than with any other bolt on yo can buy. it'll drop your 1/4 times and you're "spirited" driving with be a lot funner :). dont listen to these dildos like jcrx, they dont know what they're talking about. they've seen F&F too many times....... http://www.automotiveforums.com/vbulletin/images/icons/icon13.gif

jcrx
04-24-2004, 01:57 PM
if they're new and dont know the answer they shouldnt post like they know wtf is going on and like they know waht they're talkin about. it also doesnt sound lik you know what you're taklin about. "transmissions run out of gearing"? Elaborate for us all. nuff said about that!

it'll drop your 1/4 times and you're "spirited" driving with be a lot funner :). dont listen to these dildos like jcrx, they dont know what they're talking about. they've seen F&F too many times.......
BWAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAAHAHAHAHAHA

Yes dumbass, they run out of gear, do you even know what a transmission is? You are real good at copy pasting stuff, but lack any real knowledge. A transmission is a set of GEARS, each longer than the previous, that spin one another to turn the axles. And as you copy pasted once the engine speed reaches a certain rpm per gear, they no longer are making the car go forward any faster, hence the term running out of gear, then you shift gears, engine speed drops, you go into a higher gear and continue accelerating till you run out of gear again, and so forth.


Fast and Furious, that's cute. Your an idiot, and your Slay the newbie attitude exudes your own shame for the Bi and the Curious being the reason you know anything about cars.

DeleriousZ
04-24-2004, 01:59 PM
don't mess with jcrx.. he'll rip you apart

by the way doesn't a gsr redline at 8200?

jcrx
04-24-2004, 02:11 PM
the gsr's power band is higher in the rpms range (and nowerer) hence the shorter tighter gears.... the LS's power band isnt as high and is a bit broader which is why it has taller gears. if i were you i'd just get an ITR tranny with the LSD already in it

And what the hell is nowerer, is that something you made up, or are you too stupid to go back and check to make sure what you type makes sense? But anyway, the LS uses taller gears because it is economical to do so, if you put a GSR tranny, or a B16A tranny on it, it becomes a more spirited motor. It's power band doesn't change because of the tranny, the tranny due to it's shorter gears makes better use of it. Just changing trannies doesn't increase a motors redline, it only makes better use of the power since the shorter GEARS get you to speed faster.

And that is the gearing for the USDM ITR tranny that has the same gears as the B16As Y21, the JDM B18C (R) has a shorter final drive (4.785), making acceleration even faster, but since I see no mention of the final drive, I guess you just "forgot" about it and how it affect tranny gearing in your "educational" tirade.

jcrx
04-24-2004, 02:24 PM
by the way doesn't a gsr redline at 8200?
It makes max power in stock form at 7600rpms, I forget what the rev limit in the ECU is. The B16A makes max power at 7800, B18C/5 at 8000 and the B16B makes it at 8200.

jcrx
04-24-2004, 03:34 PM
And here are a couple more formulas for you, since yours is flawed and would consitute that all things are equal with no varibables, and since we all know there are variables in everything, it doesn't work. Those would be friction, tire size, drag coeffiecient, and so forth

rpm = (mph x gear ratio x 336) / tire daimeter

gear ratio = (rpm x tire diameter) / (mph x 336)

effective ratio = (old tire diameter / new tire diameter) x original ratio

actual mph = (new tire diameter / old tire diameter) x actual mp

drive wheel torque = flywheel torque x first gear x final drive x 0.85

wheel thrust = drive wheel torque / rolling radius

g = wheel thrust / weight

weight transfer = weight x cg height / wheelbase x g

Oh, and in you equation, where is the variable for shift speed, or is that taking only into account rotational mass, and the engines own decceleration speed under it's mass, in an otherwise vacuum?


Also, since you give no indication where the LS's powerband , knowing what rpm you're going to fall into after any particular shift is useless, you would need to compare the rpm points along the powerband to the where the rpms land after any given shift.

JakeDrummer
04-24-2004, 09:37 PM
It makes max power in stock form at 7600rpms, I forget what the rev limit in the ECU is. The B16A makes max power at 7800, B18C/5 at 8000 and the B16B makes it at 8200.

B18C1 - 170hp @ 7,600 rpm, redline @ 8,000 rpm. rev limit 8,200 rpm. (up to 8,500 some times for no reason)

also the since your ratios will change your rpms with either raise or lower with a different tranny. B16 trannys generally run crazy RPM at interstate speeds. And LS trannys will run your motor at a lower RPM. So your fuel mileage will change.

anyhow just my :2cents:

YellowITR479
04-24-2004, 11:33 PM
Damn I started some shit, well lets make the record clear, 1st and 2nd gear stay in vtec when i shift at the redline, 3, 4 & 5 dont, I am allready looking for an empty tranny case to hadle my business. As for the car, I have a new concern. I finally had the balls to take my car to 1 bar ( 14.7 psi ) whewww. I fuckin blew the doors off an newer vette from like 25 to 140 hahah. I love that button. The problem is, every time i boost over .50 bar ( u do the math ) after the run my car doesnt want to move at all. I have to shut the car off and restart it for it to move again. Anybody know why? I think its the factory ECU. I also noticed my car runs smoother at 1 bar than a half bar mich makes me believe that my car is allready fueled for the high boost and is running rich at low boost. Anybody agree with me?

YellowITR479
04-24-2004, 11:51 PM
Oh and by the way, I made an false claim earlier in the week stating that I thought my car wasn't fast, FUCK That this car has found a new best friend. I am ready to spend some more money in her. Anybody know a company that sell an complete valvetrain assembly made for boost ( valves, retainers, spring & cams ) i allready ordered the EMS on friday ( rush ship lol ) and found someone that is sorta familiar with its operation to at least get me going. I am looking for at least 450 whp tuned and I think I will reach that. Anybody have any preliminary estimates before I get some dyno time?

jcrx
04-25-2004, 04:44 AM
B18C1 - 170hp @ 7,600 rpm, redline @ 8,000 rpm. rev limit 8,200 rpm. (up to 8,500 some times for no reason)

also the since your ratios will change your rpms with either raise or lower with a different tranny. B16 trannys generally run crazy RPM at interstate speeds. And LS trannys will run your motor at a lower RPM. So your fuel mileage will change.

anyhow just my :2cents:
Yea, that's it. But the B16A tranny isn't that bad on the highway, with the right exhaust. Mine is around 6000rpms at 120 mph (I drive the autobahn, kids, don't try this in the states), and it isn't that loud, with a Apex WS, or RSR. Now some straight pipe and a N1 and you better have some ear plugs.

andera
04-25-2004, 04:12 PM
BWAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAAHAHAHAHAHA

Yes dumbass, they run out of gear, do you even know what a transmission is? You are real good at copy pasting stuff, but lack any real knowledge. A transmission is a set of GEARS, each longer than the previous, that spin one another to turn the axles. And as you copy pasted once the engine speed reaches a certain rpm per gear, they no longer are making the car go forward any faster, hence the term running out of gear, then you shift gears, engine speed drops, you go into a higher gear and continue accelerating till you run out of gear again, and so forth.


yes the engine runs out of speed, the transmission will obviously reach its maximum operating rpms. HOWEVER, THAT HAS TO DO WITH THE ENGINE NOT THE TRANSMISSION!! i've never heard it refered to that way "running out of gear". if you werent a dumbass you'd read my post which has nothing to do with FD. It has to do with the engine and its powerband (if you knew anything at all you'd know that matching the right transmission wiht your powerband will yeild great gains, and it's fundamental to a FAST car.). part of the reason why his car is slow is because the LS tranny was not built for the GSR power band (wich is narrower than the LS... LOOK AT A DYNO. the torque curves are different and if you knew anything you'd know that higher revving engins (for the most part) have a much narrower powerband than say an LS - hence the tighter gears). if you'll READ my post you'll see that when you're redlining your engine in 3rd and shift to 4th (GSR with and LS tranny) you'll be dropped out of the power band and vtec. it's true that if you put a higher FD you'll run through the gears faster, but seriously thats not whats slowing his car down and thats nothing to do with my post... so dont bring it up dipshit, by the way... did you read my post? i wish i had time for a better response, i'm sure i'll be back later.

jcrx
04-25-2004, 04:44 PM
Too bad you feel you need to resort to name calling, you almost have a good point. But if that's the way you want to play cumdumpster, we can go tit for tat all damn week.

Maybe you need to work on your presentation there a bit, eh fuckface, or maybe your daddies balls are in your way while you're trying to concentrate on typing. Anyway, I understand the whole matching best gearing for powerband, all the engine and performance theory you can muster there scrotum master, I have tried and tested it, so take your elitist semen slurping attitude else where.

YellowITR479
04-25-2004, 05:09 PM
can we get back on subject people. anybody have any comments about the reply i posted last night about my car not wanting to move after an high psi blast

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