04 Spec V, SR20DET SWAP???

[robertsmb]

Hello,
Ive had my 04 SE-R Spec V for about 4 months, and just to tell you a little about myself, I started out in 2002 with a WS6 Trans-Am and added a Jackson Racing Supercharger. After I blew that one up last year, I went out and purchased the 04 Dodge SRT-4 with Stage 2 Turbo upgrades, and many aftermarket mods. My wife rolled it driving to work one day and totalled it out.
As you can see, I am used to very powerfull performance cars. I dont feel right, unless im running 12.0 or better on the track.

So, back to the top... I have this 04 SE-R Spec V, and Im looking for info on making it fast. Now, Ive seen the Spec V forums, and people with insane ammounts of money in mods are barley running 13's on this QR25 motor.

Would an SR20DET swap be a good idea? Any problems? Pro's? Con's? Im looking for a daily driver, that I can put my licence plate back on with pride. IEATV8s

Any info is appreciated. Thanks.

[fry_ed]

one person has done it and says he's gonna break into the 12s next time he goes to the track. his name is pimpride and he's on www.thevboard.com

you should pm him about it.

[brad2.5]

get powertech imports stage 2 or 3 turbo kit

[fry_ed]

is there anyone running a PTI kit yet?
FIR has the most proven bolt on turbo kit...
they have some other good stuff coming in the near future too i hear.

robertsmb, no spec-v owner has ever posted a timeslip of 12.0 though. SR20DET swap is probably your best bet, but why didn't you get another '04 SRT-4 if you're a drag racer?

[chris0276]

Sorry guys, I don't know much about cars. But why would you trade in a QR25 over a weaker engine like the SR20??? What is so special about SR20? If it was as good as people make it out to be then why didn't Nissan keep the engine instead of the QR25?

[brad2.5]

what is fir

[Spec-V@1320]

In my opinion I would do a complete engine rebuild with strengthen internal components. I know there isn't a rebuild kit for a QR25 that I know of but with enough money you can have all internal parts custom machined. Replace every engine component with high performance ones(valves cam shafts etc...) Don't forget a clutch and a flywheel and get the tranny rebuilt as well. I would recomend to run low compresion so you can run some boost. Get some drag radials too.Leave the body style alone so people wont know what hit them . Either way it is going to be expensive. SR20DET established itself and it fairly easy to get parts for it.The SR20DET has alot of potential don't get me wrong. Before I got my Spec V I wanted a 240SX and I wanted to swap the KA24 for a SR20DET. I did'nt have enough money to buy the 240SX and to do the swap all at once so I got the Spec V because I needed a car. Also that way I can pay it over time. I'm not very patient. A friend of mine has a 89 accord and he can't decide to do a rebuild and go turbo with the A20 or to do a B18 swap. I would do the swap cause the A20 is a SOHC. The SR20DET's advantage is the stock turbo that it has over the QR25 . Strip the SR20DET of it's turbo and you'll see what the engine is made of.I don't know the numbers for a SR20DE so I can't tell you which one is better in my opinion. The QR25 has little more displacement but that really doesn't matter. The stock QR25 isn't the most efficient engine but if you give it a chance it will show it's true colors. It just depends on how fast you want the car to be and how much money you want to spend. If you are worried about emmisions and it being street legal you should you wait untill some one makes a decent turbo kit that doesn't have a turbo the smaller than a doughnut and that is legal.

[mmcleo11]

My SR20DE(not a DET!) FWD runs a 13.04sec qtr without NOS in Australia but I can tell you that a SR20DET will get you into the 12s in OZ would be a aftermarket exhaust manifold feeding a GT30 ball bearing turbo(or similiar) with 18psi, front mount intercooler, 3" exhaust from the turbo back, bigger injectors, MoTeC computer and rebuilt bottom end with forger pistons(8.0:1 compression) which with the right clutch / flywheel combo and a tranny capable of handling the estimated 400hp at the flywheel, should get you pulling 12s in no time

[VQuick]

Check your local laws around engine swaps, too. In some areas, it's illegal to swap in a motor that is older than the car.

[GB Phoenix77]

the true limits of the QR25de have not really been tested yet. If you want proven HP potential.. I would say the SR20det is a great idea.

If money isn't too tight.. throw down $2500 on a SR20det from Japan and have fun.. For most of us.. money is limited so we need to be more creative..

Let me throw out another idea for you...



KA24de. The KA is an iron block designed for use in truck originally. Because it is very torquey, it turned out to be a great engine for small cars. So Nissan put it in the 240sx in rear wheel drive format and the Altima in front wheel drive fashion. I have more experience with the Rear drive as I am now on my second 240sx. But the engine is the same in either car. I am not sure how the mounts sit in comparision between the old Altima and the Sentra. But, I would guess they are usable.

Here's what's cool about the KA. It is very strong. People in the 240sx world argue all the time about whether the KA with a turbo is better than the SR even after all the upgrades. So far.. the KA has been proven to show higher hp without internal modifications. I have seen reports of almost 400HP.

I am not sure how strong the front drive tranny is on the KA..

The reason I suggest this is .. KA engines are cheap and easy to find. I bet with $500 and a pickup truck to load one into you could come up with one in a heartbeat. So for the money, you can get a lot more out of a KA than either a QR or SR.

just an idea...

[blown05]

dude i have a turboed qr25de and i spank sr20det all day long. that bottom end and that displacement is the better buy. there is no turbo lag on my qr25de. u can get so much more out of ur qr25de and its more reliable

[slideways...]

wrong. a boosted SR20 will always have a bigger power potential and more reliability than a boosted qr25. its just built better. the qr is built as basically a replacement for the ka24. true if you stuff forged things into a qr, and remove the balance shafts, stock cats, and reinforce the cylinders, you can get more power, but thats putting a lot of money into it that you dont need to put into an SR to make power.

[blown05]

i only boost 8psi and i get more power to the wheels, my cousin has a 240 with the det swap and he cant compete with my sentra. the det is a good motor and strong but there is no turbo lag with the qr25de the displacment works really good with my turbo. and if u turbo a car u better be willing to spend money thats with any car and the qr25de is more reliable if u just want a basic bolt on kit

[fugiot]

I would swap in a VQ35DE. Big V6 that takes boost better than a QR25 and runs high 12s without turbo.

[nismo_pilot]

quit dragging dead threads up with the same "i got a turbo" comment, i doubt you do cuz you sound like a fucking idiot and even if you do you still sound like a fucking idiot so please quit crapping in our forum