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View Poll Results: What sr swap to do
s13 40 58.82%
s14 15 22.06%
s15 13 19.12%
Voters: 68. You may not vote on this poll

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Old 02-18-2003, 10:59 AM   #1
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sr swap

I nedd some help im trying to decide which sr swap to do either an s13,14,15 but imnot concerned too much with cash but im am concerned with power and reliability
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Old 02-18-2003, 05:06 PM   #2
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Get an s13 motor for super-power. The vtc is usually disabled on all hi-po s14 or s15 motors, and on the s15 motor, the general idea is that the 6-speed tranny will eat gears at more than 350hp.
Ohh.. and use the search.
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Old 02-18-2003, 05:33 PM   #3
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Quote:
Originally posted by Jeff240sx
Get an s13 motor for super-power. The vtc is usually disabled on all hi-po s14 or s15 motors, and on the s15 motor, the general idea is that the 6-speed tranny will eat gears at more than 350hp.
Ohh.. and use the search.
-Jeff
Also, go for an S13 blacktop motor. Easier to assume lower mileage on it.

As for the 6-spd tranny, the prob might be the speed sensor wiring more than it's strength. I don't think anyone has proven if it's actually that much weaker or not.
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Old 02-18-2003, 05:36 PM   #4
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Quote:
Originally posted by AceInHole
Also, go for an S13 blacktop motor. Easier to assume lower mileage on it.

As for the 6-spd tranny, the prob might be the speed sensor wiring more than it's strength. I don't think anyone has proven if it's actually that much weaker or not.
Just take the theory behind it. There are 5 gears that completely fill the bellhousing in KA and s13 and s14 trannies. In the s15, there are 6 gears to completely fill it, which means the gears are smaller. I'll go with that theory. Each gear is 20% smaller in the 6-speed.
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Old 02-18-2003, 05:39 PM   #5
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Quote:
Originally posted by Jeff240sx
Just take the theory behind it. There are 5 gears that completely fill the bellhousing in KA and s13 and s14 trannies. In the s15, there are 6 gears to completely fill it, which means the gears are smaller. I'll go with that theory. Each gear is 20% smaller in the 6-speed.
-Jeff
Yeah, but is anything known about the materials of the gears, the amount of material that could be removed to accomadate larger gears inside the tranny, or the full amount of power the SR tranny can withstand?? I mean, assuming you could sandwich smaller synchros, or place gears closer together, it might be possible to fit smilar width gears in the 6-spd. So, really is theory vs. theory.
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Old 02-18-2003, 05:47 PM   #6
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Yea.. but your theory sucks... and I win.
That's what Turbo magazine says, and so do silvia websites...
-Jeff
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Old 02-18-2003, 06:11 PM   #7
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Quote:
Originally posted by Jeff240sx
Yea.. but your theory sucks... and I win.
That's what Turbo magazine says, and so do silvia websites...
-Jeff
And all of them are as reliable as some guy making invalid assumptions, most based on some earlier invalid assumption. You're assuming the output shafts are the same length, and the tranny casings are the same size. In reality, the tranny cases are not the same.
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Old 02-19-2003, 02:51 AM   #8
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hey kids! its your favorite dj, mixedwell! yay! okay anyways i've actually had the chance to help my friends at motoRex build a 450+ hp Silvia S15 w/ six speed transmisson. now contrary (is that spelled right?) to belif, the six speed transmission was actually holding up nicely. now our reason for doing all this was just to see how fast we can get the s15 to go. the tranny had stock gear ratio and even stock clutch (but not for long). now all i can say is that the s15 6speed trans can hold alot of power. that 350 hp thing sounds ludicruious to begin with. there. i know from experience. in fact i win.

on another note, i belive the S13 SR20DETs are great SRs. although they do lack the VTC that people are so happy in ditching. but if you ask me i think the s14 SR20DETs are the best. well, if you put it inside a s13/s14 240sx. for power to relibility is concerened, a nice s14SR w/ GReedy FMIC, BOV, and boost control. set at 10 psi and you have one nice fast SR20det. thats just my 2 cents.

ps- when we built the s15, we didnt sacrafice the VTC. we didnt want to mess with it in the first place.

holla
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Old 03-09-2003, 12:41 PM   #9
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o my what is this? JDM SR [email protected]
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Old 03-09-2003, 01:24 PM   #10
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HP doesnt matter to transmissions, its torque that kills them?

How much torque was that s15 motor making what kind of mods?
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Old 03-09-2003, 01:29 PM   #11
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HP doesnt matter to transmissions, its torque that kills them?

How much torque was that s15 motor making what kind of mods?
nice how ur talking about torque
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Old 03-09-2003, 02:42 PM   #12
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nice how ur talking about torque
Nice how you're not talking about Ca18guy's mom.
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Old 03-09-2003, 02:45 PM   #13
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Nice how you're not talking about Ca18guy's mom.
yay its hard ot talk **** about her when she is giving me head
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Old 01-22-2005, 10:39 PM   #14
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S13 all the way!!
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Old 01-24-2005, 06:32 PM   #15
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Old 01-24-2005, 11:14 PM   #16
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Old 01-25-2006, 10:11 PM   #17
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s15 Autech w/ 6speed and ITBs.
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Old 01-25-2006, 10:40 PM   #18
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OMG, please tell me you didn't see the post above yours about how old this thread is?

Fucking Newbs...
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