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Old 09-19-2004, 09:08 PM   #1
Corey
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engine swap rb20det? sr20det?

hey im looking to swapping a new engine in my 91 240sx will an s13 sr20det redtop be better than the rb20det? which will go faster?which will be easier about how fast will each go on a qm? whats the top speed? note: stock engines.....and which can hold more hp? i did some research and it came up about equal but the rb would be harder to put in some ssay the sr would be harder please help
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Old 09-21-2004, 12:50 AM   #2
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I could be wrong, but I've seen this question asked at least a half-dozen times. Do a search.
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Old 09-22-2004, 12:29 PM   #3
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Exclamation bit of help

Quote:
Originally Posted by Corey
hey im looking to swapping a new engine in my 91 240sx will an s13 sr20det redtop be better than the rb20det? which will go faster?which will be easier about how fast will each go on a qm? whats the top speed? note: stock engines.....and which can hold more hp? i did some research and it came up about equal but the rb would be harder to put in some ssay the sr would be harder please help

Hey, I would go with the SR20DET because its better then the RB20 in a 180sx/240sx The SR20DET will provide about 220HP and Stock on 1/4 mile will get ya around 14.3 seconds... redline about 7500rpm... whoever said that the SR20 is harder to put in mustn't know to much because it's really easy... the 1997 180sx comes with SR20... so yeah i reckon you should go the SR20
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Old 09-22-2004, 11:16 PM   #4
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Quote:
Originally Posted by Corey
hey im looking to swapping a new engine in my 91 240sx will an s13 sr20det redtop be better than the rb20det? which will go faster?which will be easier about how fast will each go on a qm? whats the top speed? note: stock engines.....and which can hold more hp? i did some research and it came up about equal but the rb would be harder to put in some ssay the sr would be harder please help

Well for starters. You should be a little more precise on what you definition of "better" is. Theres no telling wich engine will give you the highest top speed. There are alot more things than HP that will determine your top speed. As far as easier, they are both pretty handfull swaps. I would'nt exactly call any engine swap that directly bolts in, or uses custom brackets, any harder or easier than another engine swap. You're still taking out the engine completley in the first place. So if you're looking for something easy, maybe swapping is'nt for you.

Now what I can help you with is that the USDM motor allready in your 240SX, or one that can be bought for a fairly cheap price is more efficient on the quartermile than the SR20DET. The KA24DE(T), when turboed, will pull faster trap times than an SR20-T swap. So if drag racing is your thing, then you'd be better off keeping the motor you have in your car and turboeing it. Its going to be alot easier, cheaper, and more efficient for quartermile purposes to keep the motor you allready have and turbo it.

So unless you're into some kinda autocrossing or drifting, you'd be best to stay with your current motor and start looking for a turbo solution. Better fuel injectors, fuel pump, and a high-flow 2.5-3" exhaust.
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Old 09-23-2004, 09:05 PM   #5
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Originally Posted by DSMer
Well for starters. You should be a little more precise on what you definition of "better" is. Theres no telling wich engine will give you the highest top speed. There are alot more things than HP that will determine your top speed. As far as easier, they are both pretty handfull swaps. I would'nt exactly call any engine swap that directly bolts in, or uses custom brackets, any harder or easier than another engine swap. You're still taking out the engine completley in the first place. So if you're looking for something easy, maybe swapping is'nt for you.

Now what I can help you with is that the USDM motor allready in your 240SX, or one that can be bought for a fairly cheap price is more efficient on the quartermile than the SR20DET. The KA24DE(T), when turboed, will pull faster trap times than an SR20-T swap. So if drag racing is your thing, then you'd be better off keeping the motor you have in your car and turboeing it. Its going to be alot easier, cheaper, and more efficient for quartermile purposes to keep the motor you allready have and turbo it.

So unless you're into some kinda autocrossing or drifting, you'd be best to stay with your current motor and start looking for a turbo solution. Better fuel injectors, fuel pump, and a high-flow 2.5-3" exhaust.

Actually the KA24De turbo kits start at around $3,500 for the better ones, and $4500-$5500 with internals. You can get an SR20DET for $1500, comes with 205hp stock (S13) and can hold pretty massive amounts of power on stock internals. For the $3,500 it takes to turbo the KA24De, you could have a 450-500hp SR20DET. That's why so many people swap it
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Old 09-23-2004, 10:17 PM   #6
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Quote:
Originally Posted by thunderbird1100
Actually the KA24De turbo kits start at around $3,500 for the better ones, and $4500-$5500 with internals. You can get an SR20DET for $1500, comes with 205hp stock (S13) and can hold pretty massive amounts of power on stock internals. For the $3,500 it takes to turbo the KA24De, you could have a 450-500hp SR20DET. That's why so many people swap it

Hmm... Its common misconceptions like this that lead people to believing that SR20 swaps are in someway "cheaper", then they turn out costing well over $3,000. First of all an SR20 cost $1500 at minimum. Not to mention shipping, so we'll just round that to $2000. Installing will cost arround another $600-$800 even if he does it himself. So you tell me how can you push a 210HP motor to 450-500 with $400-600 bucks? You obviously lack the knowledge of what this swap entitles, else you would'nt be making such ludicrous statments.

No need to reply with any statments giving quotes on various products and stuff you found offline. Save me and you the trouble of embarassment. For I have performed one of these swaps, walked through the whole buying process, and was there to oversee every single operation of it. Oh and the K24 runs a 9:2:1 compression, it may not be the best to run a turbo, but he would'nt need any internals, unless he planned on running some serious boost. Not to mention GReddy makes a $2600 turbo kit, so obviously someone has not done their reasearch on "good turbo kits".

Oh and the reason so many people swap SR20 is because they are in fact misinformed, just like you. They would like to use their car for a drift application, wich tends to work very well. Or they want to enter car shows and shiny red top SR20's look cool and get more points for show cars.

Haha $3500 to get 500HP, well I know you've never gotten a car to that much power let alone driven one with that much power. Not making statements like that. Trust me, 500HP takes alot more than just $3500. If it was that easy there would be more 500HP 240SX's arround now would'nt there?
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Old 09-25-2004, 12:17 AM   #7
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Quote:
Originally Posted by DSMer
Hmm... Its common misconceptions like this that lead people to believing that SR20 swaps are in someway "cheaper", then they turn out costing well over $3,000. First of all an SR20 cost $1500 at minimum. Not to mention shipping, so we'll just round that to $2000. Installing will cost arround another $600-$800 even if he does it himself. So you tell me how can you push a 210HP motor to 450-500 with $400-600 bucks? You obviously lack the knowledge of what this swap entitles, else you would'nt be making such ludicrous statments.

No need to reply with any statments giving quotes on various products and stuff you found offline. Save me and you the trouble of embarassment. For I have performed one of these swaps, walked through the whole buying process, and was there to oversee every single operation of it. Oh and the K24 runs a 9:2:1 compression, it may not be the best to run a turbo, but he would'nt need any internals, unless he planned on running some serious boost. Not to mention GReddy makes a $2600 turbo kit, so obviously someone has not done their reasearch on "good turbo kits".

Oh and the reason so many people swap SR20 is because they are in fact misinformed, just like you. They would like to use their car for a drift application, wich tends to work very well. Or they want to enter car shows and shiny red top SR20's look cool and get more points for show cars.

Haha $3500 to get 500HP, well I know you've never gotten a car to that much power let alone driven one with that much power. Not making statements like that. Trust me, 500HP takes alot more than just $3500. If it was that easy there would be more 500HP 240SX's arround now would'nt there?

$1500 is for the complete motor...shipping wont be much over $200-$250 pending you know WTF you're doing. Install is, like you said, between $600-$800. Sorry to say, but iI have NOT been misinformed. How many 400-500hp Ka24de's have you seen? I've seen, Zero. I've seen (with my own two eyes), about 4 400-500hp SR20's. One major advantage the Sr20 has over the Ka24De is it's redline, more oppurtunity to get more boost without the KA falling on it's face at 6000. I can't find this Greddy turbo kit (with the RD06-SH, a bit big for this application to begin with...) for under $3k. Matter of fact http://www.turbo-kits.com/240SX_turbo_kits.html there it is $3200, and only gives you 220rwhp (and that's their CHEAPEST kit, Id much rather the FMAX with the T3/04e..not to mention the Greddy kit doesnt even come with a INTERCOOLER). A stock $1500 SR20DET will yield you with at least 175rwhp and you can make up the difference in 45rwhp with 3" piping all the way back and a Boost Controller ($500 if you spend your money right). You didn't even mention installation of the Turbo kit, which shops usually charge AT LEAST $300 for that.

So let's tally this up....

SR20DET -
$1500 - motor
$250 - ship (assuming your local shop doesnt have it)
$800 - install (notice im using max for all this, my shop charges $600 for all SR20 swaps into 240's becuase it's so easy).

Total : $2550

Greddy Turbo Kit -
$3200 - kit
$30 - ship
$300 - install

Total : $3530

Looks like a grand more to me... And that Greddy price probably won't fluctuate more than $300 (will go drastically UP considering you would probably WANT an Intercooler if you are in a good state of mind), if you install it yourself, but the Sr20DET swap (Since its VERY easy), will flucuate up to $1050 less pending you dont have to ship it (which around here we dont) and install it yourself. Now, AGAIN you see why so many people swap SR20DET's in their 240's.
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Old 09-25-2004, 12:30 AM   #8
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Again, here goes that ignorance arrogant issue. You're only expressing what you THINK you know. I said not to elaborate, you'd just make yourself look like a dumbass. Go post exactly what you just did in a 240SX forum. Tell them that you plan on spending that much money max on a SR20 swap, tell them thats the reason people swap is because its cheaper. Then come back here and tell me how they laughed at you and critisized you.

Again, you have very little valid imput upon this subject. You have never done this swap, I have. Stop debating with me. I don't care what you say. I did'nt even read all of that. Your logic reasoning can't compare to a person who has actually done it.
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Old 11-18-2004, 08:12 AM   #9
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ok DSMer you are an idiot....

lets get this clear. SRs are good Drag motors all in how you set it up. the gearing in the SR tranny and the KA tranny are the SAME! as for prices of swaps form a show your looking at around 4800 for a full SR swap custom AC FMIC FUEL PUMP and AUTO -> Manual Swap... Black Top S13 SR20DET....

RB20 is about 1k less for the same thing...

KA-T is a verry good motor, but for some nice power you wnat a lower mileage motor.. so usualy the stock KA is not a good choice. Yes 3k for a greddy Turbo kits nets you about 250 WHP but thats onyl on 7psi.

Now the SR stock i belive is 7-10 psi for around 190 WHP...

KA is 9.5-1 appx
SR is 8.5 or 9 to i dont know off the top of my head right now

so the SR can handle more Boos Stock, there fore the cost of Upgrading the KA wiht interanals to handle more boost Is more by about 2k dollars. BUt by then you ahve already spent 6k and can fianly handle 20psi for the ka and a nice 450 whp appx.

The Sr is just popular right now becuse it is easy. both to do and to get parts.

Either motor is good it just depends on your purpose and tunning options.
and as always how much money do you want to spend for the power you are looking for.
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Old 11-18-2004, 08:45 AM   #10
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Quote:
Originally Posted by x0dyssey
ok DSMer you are an idiot....

lets get this clear. SRs are good Drag motors all in how you set it up. the gearing in the SR tranny and the KA tranny are the SAME! as for prices of swaps form a show your looking at around 4800 for a full SR swap custom AC FMIC FUEL PUMP and AUTO -> Manual Swap... Black Top S13 SR20DET....

RB20 is about 1k less for the same thing...

KA-T is a verry good motor, but for some nice power you wnat a lower mileage motor.. so usualy the stock KA is not a good choice. Yes 3k for a greddy Turbo kits nets you about 250 WHP but thats onyl on 7psi.

Now the SR stock i belive is 7-10 psi for around 190 WHP...

KA is 9.5-1 appx
SR is 8.5 or 9 to i dont know off the top of my head right now

so the SR can handle more Boos Stock, there fore the cost of Upgrading the KA wiht interanals to handle more boost Is more by about 2k dollars. BUt by then you ahve already spent 6k and can fianly handle 20psi for the ka and a nice 450 whp appx.

The Sr is just popular right now becuse it is easy. both to do and to get parts.

Either motor is good it just depends on your purpose and tunning options.
and as always how much money do you want to spend for the power you are looking for.

You're telling me this because? I allready know well more than you've explained. Your theory is very rice based, and your prices are wildy distorted. I have the reciepts and the bruised knuckles from this area or motors. I don't need someone of your stature to tell me why and how I should do etc...
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