would it be worth it

Post by **00_Altima MD** » Mon Mar 17, 2003 7:29 am

I was just wondering if it would be worth it to try and turn my 2k altima into a 2k2 altima by dropping in the qr25de or should i stick with what ive got and just keep moddijng this KA

Post by **blackaltima** » Mon Mar 17, 2003 7:29 am

Swapping would be costly. How much power would I get by putting in a qr25 to my 2k? How much would I spend to get that power? For less money, I could gain more power by modifying the ka24de. Now, to swap it w/ a sr20det........

Post by **nlzmo400r** » Mon Mar 17, 2003 7:29 am

blackaltima wrote:Swapping would be costly. How much power would I get by putting in a qr25 to my 2k? How much would I spend to get that power? For less money, I could gain more power by modifying the ka24de. Now, to swap it w/ a sr20det........

well it depends on what ur looking for, a new engine would obviously make ur car last much longer, however so would a new sr20, if u want to stay NA and want more power than a KA, then obviously the qr is the way to go, yes it would be costly, but im sure u could find a wrecked altima or spec v with the qr25de in it for a decent price. the KA (depending on year) has roughly 155hp at the crank and 153ft bls of torque and has an iron block (stronger block, much heavier), the QR25DE has 175hp and 180ft lbs of tq, and the SR20DET (depending on year, im assuming ur getting one out of an s13?) this comes with (correct me if im wrong) about 215hp, and this obviously has the turbo (make sure the turbo is working perfectly before dummping ur money into buying the sr20) and doesnt have quite the torque of either motor (about 140ft lbs), obviously all of hte engines would fit, im pretty sure the KA will be the cheapest, then the sr20, and probably the most expensive (cause of hte newness of hte engine) will be the QR. hope i was some help, someone correct me if u find anything wrong in here, but im pretty sure this info is correct, good luck and nice plan!!

Post by **Cold_Zero** » Mon Mar 17, 2003 7:29 am

It really depends on what you want to do with your Altima. I would have a couple of concerns for swapping engines into a second generation Altima.

First you would need to check to see if the QR25DE or the transversally mounted SR20DE(T) (from a Bluebird or 200SX) would mount into a second generation Altima with relative ease. If the project is going to be a pain and cost lots of money, your money and time will probably be better spent buying a new/different car that has better capabilities.

Second, if you decide to go naturally aspirated and build up the motor, I would choose the QR motor. Obviously the QR motor is 13 percent lighter than the SR20DE engine and 20 percent lighter than the KA24DE engine. The QR has a good power to weight ratio. It also offers the most torque of the three naturally aspirated versions of these engines.

Third, if you plan on introducing forced induction to the engine, I would steer clear of the QR motor because of its open deck block design. You could run low amounts of boost and get by. But I have a hesitation of introducing forced induction to an engine that not initially designed for it. The question is not if you can boost an engine, its how long will you be able to boost it. The QR motor lacks strong internal parts that allow the engine to withstand prolonged boosting like the SR20. The amount of money you will spend strengthen the internals of the QR motor may really be better spent on other performance modifications to your car. The KA motor doesn’t have the strongest internals compared to the SR20 but people have been adding turbo kits to this engine more than the QR25DE.

Lastly, I would think that the SR and KA motors have more aftermarket performance parts than the QR currently does. If Nissan keeps using the QR motor, this will change, as the QR will be the workhorse for the midsize and economy classes for Nissan.

The old adage goes, “With the right amount of money, almost anything is possible.”

Post by **nlzmo400r** » Mon Mar 17, 2003 7:29 am

Cold_Zero wrote:It really depends on what you want to do with your Altima. I would have a couple of concerns for swapping engines into a second generation Altima.

First you would need to check to see if the QR25DE or the transversally mounted SR20DE(T) (from a Bluebird or 200SX) would mount into a second generation Altima with relative ease. If the project is going to be a pain and cost lots of money, your money and time will probably be better spent buying a new/different car that has better capabilities.

Second, if you decide to go naturally aspirated and build up the motor, I would choose the QR motor. Obviously the QR motor is 13 percent lighter than the SR20DE engine and 20 percent lighter than the KA24DE engine. The QR has a good power to weight ratio. It also offers the most torque of the three naturally aspirated versions of these engines.

Third, if you plan on introducing forced induction to the engine, I would steer clear of the QR motor because of its open deck block design. You could run low amounts of boost and get by. But I have a hesitation of introducing forced induction to an engine that not initially designed for it. The question is not if you can boost an engine, its how long will you be able to boost it. The QR motor lacks strong internal parts that allow the engine to withstand prolonged boosting like the SR20. The amount of money you will spend strengthen the internals of the QR motor may really be better spent on other performance modifications to your car. The KA motor doesn’t have the strongest internals compared to the SR20 but people have been adding turbo kits to this engine more than the QR25DE.

Lastly, I would think that the SR and KA motors have more aftermarket performance parts than the QR currently does. If Nissan keeps using the QR motor, this will change, as the QR will be the workhorse for the midsize and economy classes for Nissan.

The old adage goes, “With the right amount of money, almost anything is possible.”

amen, couldnt hace said it better myself

Post by **00_Altima MD** » Mon Mar 17, 2003 7:29 am

well that was actually going to be one of my questions was whether or not i could just bolt in the engine or not

Post by **nlzmo400r** » Mon Mar 17, 2003 7:29 am

00_Altima MD wrote:well that was actually going to be one of my questions was whether or not i could just bolt in the engine or not

well bolting up the sr20 to the stock KA transmission wont be EXTREMELY hard, but a qr swap would defintely give u some trouble, for easyness factor honestly, get a new sr20det and it should easily bolt up to ur stock KA transmission

Post by **00_Altima MD** » Mon Mar 17, 2003 7:29 am

thats cool but will the motor bolt into the stock mounts

Post by **nlzmo400r** » Mon Mar 17, 2003 7:29 am

00_Altima MD wrote:thats cool but will the motor bolt into the stock mounts

depends, which motor are u talking about, the sr, no, the KA, obviously yes, and the qr, no, but motor mount kits are cheap

Post by **blackaltima** » Mon Mar 17, 2003 7:29 am

Cold_Zero wrote:It really depends on what you want to do with your Altima. I would have a couple of concerns for swapping engines into a second generation Altima.

First you would need to check to see if the QR25DE or the transversally mounted SR20DE(T) (from a Bluebird or 200SX) would mount into a second generation Altima with relative ease. If the project is going to be a pain and cost lots of money, your money and time will probably be better spent buying a new/different car that has better capabilities.

Second, if you decide to go naturally aspirated and build up the motor, I would choose the QR motor. Obviously the QR motor is 13 percent lighter than the SR20DE engine and 20 percent lighter than the KA24DE engine. The QR has a good power to weight ratio. It also offers the most torque of the three naturally aspirated versions of these engines.

Third, if you plan on introducing forced induction to the engine, I would steer clear of the QR motor because of its open deck block design. You could run low amounts of boost and get by. But I have a hesitation of introducing forced induction to an engine that not initially designed for it. The question is not if you can boost an engine, its how long will you be able to boost it. The QR motor lacks strong internal parts that allow the engine to withstand prolonged boosting like the SR20. The amount of money you will spend strengthen the internals of the QR motor may really be better spent on other performance modifications to your car. The KA motor doesn’t have the strongest internals compared to the SR20 but people have been adding turbo kits to this engine more than the QR25DE.

Lastly, I would think that the SR and KA motors have more aftermarket performance parts than the QR currently does. If Nissan keeps using the QR motor, this will change, as the QR will be the workhorse for the midsize and economy classes for Nissan.

The old adage goes, “With the right amount of money, almost anything is possible.”

Well said, Cold Zero!

Post by **nlzmo400r** » Mon Mar 17, 2003 7:29 am

blackaltima wrote:Well said, Cold Zero!

true, and all in all, i would say go with a built ka or sr20, if u want forced power, def the sr20

Post by **Cold_Zero** » Mon Mar 17, 2003 7:29 am

00_Altima MD,Did you find out anything more about a QR swap? Just wondering where you want to go from here about your ride. Please let us know and what we can do to help.Bud

Post by **nlzmo400r** » Mon Mar 17, 2003 7:29 am

where u been bud?, this forum has been getting almost NO attention whatsoever, i think i last posted on EVERY single thread, we need more people in here!< and i havent heard 00_altima say anything about his possible swap, i still say go with teh sr20 or ca18

Post by **lifeofshadoze** » Mon Mar 17, 2003 7:29 am

for a brief reference, the sr20 should not even be an option when thinking about a swap. Copious amounts of time, money and study will go into it. Into a first or second gen altima, the swap is just as, if not more difficult.Ive had an altima for three years, in that time, there has been one sr20 swap. one, of which was in a 93 altima. Cost was $7k.

Post by **nlzmo400r** » Mon Mar 17, 2003 7:29 am

i think the sr20 would probably be one of hte cheapest and easiet swaps out there, in the japanese bluebird (granted it has AWD), the sr20 is in there, htey mount rite up on the altmas, however new mortor mounts are needed cuz the sr20 sits a bit higher on stock KA motor mounts

Post by **00_Altima MD** » Mon Mar 17, 2003 7:29 am

well guys i have been out of town for the past week and i am not going to do the swap i am just going to build the KA as of right now. i just did a few more mods in the past week and i am really starting to enjoy the power of the KA. I just got some nology wires today and i am waiting to see how the combination of iridium plugs goes along with it.

Post by **00_Altima MD** » Mon Mar 17, 2003 7:29 am

i've got another question. i dont know if anyone would know this or not and my dad told me to ask a nissan engineer about it but, if i boared out the engine and bought higher compression pistons and rings it wouldnt blow up my engine would it.

Post by **00_Altima MD** » Mon Mar 17, 2003 7:29 am

well that combination sux i think that my distributor cap went out and i might even have to get a new ecu becuase my car is running so damn bad...

here is what happened...i replaced my stock spark plug wires with the new nology hot wires and my car just started running like ****. so i thought that it might have been the chip that i spliced into my AIT so i took that off and it still ran like ****. i tried grounded the wires down onto the valve cover and it still didnt work i tried wiggling the MAF sensor that still didnt work. i dont know what to do now. any ideas as to what it might be. here are the symptoms of the motor. it starts up and the motor moves alot inside the engine bay and it moves a whole lot at idle. slow throttle reaction and not a usual rev at all. i really need help with this as soon as possible.

thanx alot MD

Post by **lifeofshadoze** » Mon Mar 17, 2003 7:29 am

nlzmo400r wrote:i think the sr20 would probably be one of hte cheapest and easiet swaps out there, in the japanese bluebird (granted it has AWD), the sr20 is in there, htey mount rite up on the altmas, however new mortor mounts are needed cuz the sr20 sits a bit higher on stock KA motor mounts

uh, no lol. thats actually completely wrong. Its one of the most difficult, and requires MORE custom fabrication than a k20 in a hb. They dont mount rite up, n i dont know where u heard this from but please, let your sources know this.

Post by **lifeofshadoze** » Mon Mar 17, 2003 7:29 am

try putting your stock wires back on for the time being. second, make sure the wires are in the proper firing order. third, the cylinder walls of the ka are thin, you dont want to bore it out. U have an obd II in a second gen most likely automatic, right?

Post by **nlzmo400r** » Mon Mar 17, 2003 7:29 am

lifeofshadoze wrote:uh, no lol. thats actually completely wrong. Its one of the most difficult, and requires MORE custom fabrication than a k20 in a hb. They dont mount rite up, n i dont know where u heard this from but please, let your sources know this.

im telling u, an sr20 into a oo altima is not hard to do, its damn near the same as putting the sr into a 240, the japanese altimas (bluebird) came stock with the sr, so i KNOW they fit, and yes they can be put on stock motor mounts, seen it done, personally i would just pay the extra money and get the correct mounts, but either way, it will fit, and ur only problem will be the transmission, as far as engine tho, the biggest problem is wiring, however there are plenty of books with this info in them, but trust me lifeofshadoze, ive seen it done, without much cutting of hte engine bay, sure itll cost money, but wht doesnt

Post by **nlzmo400r** » Mon Mar 17, 2003 7:29 am

ooo, re-read my original post, bad choice of words, they dont 'mount rite up', when i say this i didnt mean the engine literally is like a bolt on and just mounts in, what i meant by mount rite up is that it fits with relative ease, sorry for the confusion

Post by **00_Altima MD** » Mon Mar 17, 2003 7:29 am

no i do have a manualdon't worry i fixed the problem yesterday i went and got a new distributor cap and a rotary clip so its all good and my car is running like a champ

Post by **nlzmo400r** » Mon Mar 17, 2003 7:29 am

even with the new wires and such??

Post by **Rev_D21** » Mon Mar 17, 2003 7:29 am

nlzmo400r wrote:i think the sr20 would probably be one of hte cheapest and easiet swaps out there, in the japanese bluebird (granted it has AWD), the sr20 is in there, htey mount rite up on the altmas, however new mortor mounts are needed cuz the sr20 sits a bit higher on stock KA motor mounts

Well the U13 Bluebird is a very different breed of car from the sales material I have collected over the last few years. The best bet of shoving a SR20DET into an altima is to get a Bluebird front clip and weld it in. The Sentra and altima have different mounts on the transmission bell housing. Previous generations of Maxima share the same transmission as the 1st and second Gen altimas.

I haven't looked into the QR25DE and its ability to be swapped. I will say that I have considered it before but still there will be fabrication involved as the Sentra and the new altima don't share much with the 1st and 2nd gen altimas.

This reply was made while I was half asleep so hopefully I made atleast one good point during it.

Post by **nlzmo400r** » Mon Mar 17, 2003 7:29 am

well said, so i guess the swaps a no=go, just stikin with the ol KA huh?

Post by **Cold_Zero** » Mon Mar 17, 2003 7:29 am

The KA24DE has plenty of aftermarket support. I don’t think you can go wrong with building up that engine. Even though a SR20DE or T would be great, I don’t think that it’s worth the money if you have fabricate things to install it. Not "worth" it when you have such a capable bro engine like the KA24DE.

Post by **nlzmo400r** » Mon Mar 17, 2003 7:29 am

Cold_Zero wrote:The KA24DE has plenty of aftermarket support. I don’t think you can go wrong with building up that engine. Even though a SR20DE or T would be great, I don’t think that it’s worth the money if you have fabricate things to install it. Not "worth" it when you have such a capable bro engine like the KA24DE.

good point, if u had an engine with NO aftermarket support, or that had like an aluminum head and a plastic block, then u got a reason to swap!!. good luck dude

Post by **00_Altima MD** » Mon Mar 17, 2003 7:29 am

yeah i am going to stick with the old KA i should eventually be down to about the mid 14's NA hopefully, but if that doesnt work out then i can just make it look good.

quick question? what do you think....1.body kit...or 2.stage 2 clutch and aluminum flywheel

Post by **blackaltima** » Mon Mar 17, 2003 7:29 am

Hmmm... I'd go for the speed mods first. Then maybe, just maybe, the looks later.

would it be worth it

would it be worth it

Nissan Forums

Infiniti Forums

Datsun Forums

Technical Forums

Classifieds / Marketplace

Nissan Motorsports

General Forums