differences in s13 and s14 KA24DE's?!?!
differences in s13 and s14 KA24DE's?!?!
my friend's s13 fastback has a DE and the redline is like close to 7000RPM while the s14's is 6300RPM, whats the story behind this? could i make my engine rev like the s13's??
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Agencymotorsports
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Axel Grungy
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Axel Grungy
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Agencymotorsports
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Nameless EJ6
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ESPER wrote:so does anyone know ??
Just an FYI: They put rev limiters there to prevent damage to your engine.
And if it was removed, you'll gain absolutely nothing considering you won't make any power in those rpm's. Nissan engineers aren't stupid.
Get different camshafts.. and go from there. But don't just remove a rev limiter unless you want to stress your engine out and possibly break something.
Ditto to Nameless...
The rev limiters are there for a reason, just because you have new cams doesn't mean you can go past the rev-limiter--maybe the camshafts can handle it, but the rest of the engine CANNOT. I have a friend with a VDUB 2.0 liter with a "chip" that removes the rev limiter---and he's hit 7000 RPM in it before when it actually redlines at 6250--I'm like, leave that poor 2 liter alone!
Come to think of it though, i guess the S13's do have a higher redline than the s14's....Although I didnt know that it was at 7000 RPM, i thought it was more like 6700 RPM--anyone have pics of the s13 gauge clusters? I'm surprised that the earlier KA's, JUST because of a difference in camshafts would up their redline to 7000 RPM...Does that mean that the rest of the KA engine is built to handle 7000 RPM and is merely dropped to 6500 RPM in the S14 because their more timid cam profile needs nothing higher? It might have something to do with the gearing of the S13's...does anyone know if the base S13's had the same gearing as the base s14's? ALso, did the SE S13's ever come with LSD?
My S14 redlines at 6500 RPM, btw, and I know bc I've brought it up there before and there's no fuel cut off at 6300, or if there is, I never notice it....The one thing I notice at redline is that damn obnoxious B&M shifter rattling! It kind of makes me feel like I'm doing something bad. I'm just interested not because I think I'll make any more power up there, (even though i do have more aggressive cam profiles than even the 91 KA ones--they're PDM stage II), but because I'd be able to hold out gears longer, and perhaps hit 60 in second (it'd make my 0-60 time a lot quicker).
But anyway, I too am curious--can the s14 KA (which i thought was IDENTICAL to the S13 KA in all areas except the cams/emissions equipment) handle the same high RPM's as the s13 KA?
MARC
The rev limiters are there for a reason, just because you have new cams doesn't mean you can go past the rev-limiter--maybe the camshafts can handle it, but the rest of the engine CANNOT. I have a friend with a VDUB 2.0 liter with a "chip" that removes the rev limiter---and he's hit 7000 RPM in it before when it actually redlines at 6250--I'm like, leave that poor 2 liter alone!
Come to think of it though, i guess the S13's do have a higher redline than the s14's....Although I didnt know that it was at 7000 RPM, i thought it was more like 6700 RPM--anyone have pics of the s13 gauge clusters? I'm surprised that the earlier KA's, JUST because of a difference in camshafts would up their redline to 7000 RPM...Does that mean that the rest of the KA engine is built to handle 7000 RPM and is merely dropped to 6500 RPM in the S14 because their more timid cam profile needs nothing higher? It might have something to do with the gearing of the S13's...does anyone know if the base S13's had the same gearing as the base s14's? ALso, did the SE S13's ever come with LSD?
My S14 redlines at 6500 RPM, btw, and I know bc I've brought it up there before and there's no fuel cut off at 6300, or if there is, I never notice it....The one thing I notice at redline is that damn obnoxious B&M shifter rattling! It kind of makes me feel like I'm doing something bad. I'm just interested not because I think I'll make any more power up there, (even though i do have more aggressive cam profiles than even the 91 KA ones--they're PDM stage II), but because I'd be able to hold out gears longer, and perhaps hit 60 in second (it'd make my 0-60 time a lot quicker).
But anyway, I too am curious--can the s14 KA (which i thought was IDENTICAL to the S13 KA in all areas except the cams/emissions equipment) handle the same high RPM's as the s13 KA?
MARC
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BuudWeizErr
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Alright...so if the S13 KA's have a verified redline of 6900 and are IDENTICAL to the S14 Ka'S in every area except emissions and cams (not an issue for me, my cams are better than a 91's anyway), then it is OKAY to bring it up to 6900 RPM in the S14 (400 RPM past the redline) assuming that there's no fuel cut off?
Someone either verify this or refute it!
Someone either verify this or refute it!
Just changing the cams, of course, isn't going to change the redline. JWT computers bump the S14 redline up to that of the S13 (my tach in the S14 reads fuel cut at 7200 now - which, according to the Apexi Rev Speed Meter is really only 6980 RPM - i.e. don't neccessarily trust the stock tach reading).
Anyway, the motors appear about 99% identical. I don't believe there is anything different in the bottom end. And I think the reason for the redline drop was because the car's power peaked at like 5500 RPM and didn't make any damn power at 6500 RPM - let alone 7000. With JWT cams, the power peak is at 6500 RPM - right at the rev limiter with the stock ECU - so JWT does increase the limiter.
That said, the head of the two cars *IS* different. On my cam install page you can see from the first two pics that in the S14 there are 5 cam support bearings, and that the end of the camshaft sits in the air with no bearing support. MY S13, on the other hand, has *6* support bearings - there is one at the very end (all the way to the right is where it would be in the pics).
Once more - that said, I've been running with the JWT ECU for about 2 years now - mostly track time (i.e. a lot of time towards redline). And it hasn't had any problems with the cams or higher redline yet.
joe
Anyway, the motors appear about 99% identical. I don't believe there is anything different in the bottom end. And I think the reason for the redline drop was because the car's power peaked at like 5500 RPM and didn't make any damn power at 6500 RPM - let alone 7000. With JWT cams, the power peak is at 6500 RPM - right at the rev limiter with the stock ECU - so JWT does increase the limiter.
That said, the head of the two cars *IS* different. On my cam install page you can see from the first two pics that in the S14 there are 5 cam support bearings, and that the end of the camshaft sits in the air with no bearing support. MY S13, on the other hand, has *6* support bearings - there is one at the very end (all the way to the right is where it would be in the pics).
Once more - that said, I've been running with the JWT ECU for about 2 years now - mostly track time (i.e. a lot of time towards redline). And it hasn't had any problems with the cams or higher redline yet.
joe
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TachyonS14
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rousie13
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My car still feels like it's pulling up to about 6300, then drops off. So the highest I usually go is 6300, but maybe 6500. I have a 91 KA (6900 redline). I have taken it up to 7000 before, but theres no real power left there. I read that 92's were the same as 91, the earlier 93's were the same as 91, but the later 93's and 94's were different. Someone correct me if I'm wrong.
Well, at least i know my engine was built for at least 6800 RPM--My camshafts are much higher perfomance than the S14 ones...so I'm happy 
On a side note--any of you have any idea how much an upper-timing chain goes for? Mine isn't on its way out or anything; nor does it make noise. But when i was changing my cams I noticed a couple of links that didn't look in that good of shape.
On a side note--any of you have any idea how much an upper-timing chain goes for? Mine isn't on its way out or anything; nor does it make noise. But when i was changing my cams I noticed a couple of links that didn't look in that good of shape.
if this fits $31:http://www.courtesyparts.com/f....html
EDIT: this is the one $28: http://www.courtesyparts.com/S14-TBKIT.html
EDIT: this is the one $28: http://www.courtesyparts.com/S14-TBKIT.html
PDM stage II regrinds...they take your core and make up a whole new shaft from the base circle. They were ~ $320 or so, plus $128 in shims (16 custom ones), and it cost me quite a bit to ship them out in a fast manner so I could get them back and get my car running. (bc PDM is in vancouver) But, they can make them for you out of the cores THEY have, then you send your cams and they refund the cost of the core cams.
available at:
http://www.pdm-racing.com
They lowered the price of shims too! (arrr!)
They make like around 11 whp--good upgrade IMO--my car was fun NA as well, and pretty fast too (CAI, H, E, Cams)...
Marc
available at:
http://www.pdm-racing.com
They lowered the price of shims too! (arrr!)
They make like around 11 whp--good upgrade IMO--my car was fun NA as well, and pretty fast too (CAI, H, E, Cams)...
Marc
