just wondering before i start working on my engine and start planning is it worthy of being tuned?
can it handle boost...or capable of gaining high HP?
i need some opinions...
if the engine isnt worthy.....is there a engine swap that is able to be put into the SpecV?
all opinions will be awesome
i need to start planning for this car
just wondering before i start working on my engine and start planning is it worthy of being tuned?
can it handle boost...or capable of gaining high HP?
i need some opinions...
if the engine isnt worthy.....is there a engine swap that is able to be put into the SpecV?
all opinions will be awesome
i need to start planning for this car
Oh yes, many people have gone turbo. And the results i just say are awesome.
sr20 engines could be put in just as general. i think someone put in a vq engine or am i just not thinking straight?
Some people will swap out the QR25 for an SR20. The SR20 does has a larger aftermarket. As for swapping a VQ, I would think that would be a little too big. I have seen a pic of a VG30 in a Sentra somewhere...
As for tuning the QR, it takes a lot of $ to get massive power. The stock internals cant handle over 8psi boost without significant changes. I bet that if you have good work done to your Sentra, you will not be dissapointed.
Try searching this QR section along with the 'natural aspiration' and 'forced induction sections'. They will provide more info than I can. Also read the 'General Info and Quick Reference for Mods' sticky to get an idea of what you can do to your car.
Thats just a bad year.. wouldnt mess with your motor
__________________ Its not what you know, its who you know
05 Brilliant Aluminum Spec V - ES MMI's Recieved! pending install
04 Blackout Sentra 1.8s! = stock = Traded in 06/27/05! http://myspace.com/rv_jd MYSPACE PROFILE PAGE
you can make high power but good luck putting that power to the ground.
The boulder nissan spec runs on 17 psi, and makes somethign liek 350 to teh wheels, but they still only ran a 13.5 on the 1/4, due to traction problems. power is not the problem traction is.
You can swap a vq35 in it though. its onyl a couple of mm off, or so i heard. There are a few peopel doign that.
Props to boulder nissan for supporting the sentra comunity
I wouldn't recommend doing too much as far as power. Cause your gas curve willl be hella bad.
If thats not an option, then I think the car itself is a nice base for potential. It is fairly light, so as they stated traction would be an issue, plus FWD doesn't normally help in that regard.
Chimmike is complete right about the 02 thing. I've been peruzing all over these forums and all i run into is seeing a bunch of problems primarily with the 02'. Not saying these cars have alot of problems, but the majority seems to have come in the first year. Then Nissan's been running the gremlins out ever since. Of course one of the main problems with doing mods to these engines is that the QR25 as i recall is only been in production since 02. I think this is right, but don't quote me. I think they came out with it specifically for the Spec-V application then just decided to throw it in the Altima too. HAHA
Not having the wide variety of uses puts it in the small class of engines that the aftermarket should focus on but don't. This engine has plenty of potential, but reallistically there is more aftermarket parts out there for a freaking MOPED then this car.
Thats just a bad year.. wouldnt mess with your motor
Fully bolted 02 here, however 02s do have the most problems. Mine uses about 1/5 qt of oil every 3000 miles.
Quote:
Originally Posted by Rowens Spec-V
I wouldn't recommend doing too much as far as power. Cause your gas curve willl be hella bad.
I usally get between 26-29mpgs in mine.
__________________ SE-R SpecV
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety. - Ben Franklin
Fully bolted 02 here, however 02s do have the most problems. Mine uses about 1/5 qt of oil every 3000 miles.
I usally get between 26-29mpgs in mine.
I'm getting that now too, but thats because i don't dare touch the gas petal or its more like 20mpg. You can't tell this guy that he's gonna get 26-29 if he's looking to tune it. Cause your 29mpg driving like a grandma before any upgrades
I'm getting that now too, but thats because i don't dare touch the gas petal or its more like 20mpg. You can't tell this guy that he's gonna get 26-29 if he's looking to tune it. Cause your 29mpg driving like a grandma before any upgrades
I play around a bit, not a whole lot though.
It does see redline from time to time though.
You can tune you car and daily drive it and get close to 30 MPGs. Just like a turbo car. Daily driving it you'll get good gas milage. However, its nice to be able to get 26+ MPGs and be able to have the power there when I want it.
__________________ SE-R SpecV
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety. - Ben Franklin
You can tune you car and daily drive it and get close to 30 MPGs. Just like a turbo car. Daily driving it you'll get good gas milage. However, its nice to be able to get 26+ MPGs and be able to have the power there when I want it.
Yeah I guess thats right, its about having the power when you need it there.
You might want to invest in a header since pre-cat break-up, on that stock r2-d2 looking manifold, effects them all.
If your compression is good and the butterfly screws have been loctited, bolt it up with IHE.
Some engine mounts and maybe remove the balance shafts too since you are out of warranty. But that will cause some (poss. unwanted) vibrations.
If you are really thinking turbo stick with the QR but plan forged internals.
2 people have put an SR20 into a Spec that I know of. One was wrecked and rebuilt into a gxe (bigger accomplishment mind you) and the other one was because their QR build went horribly wrong.
VQ35..lol. There's one that sat in an engine bay and there are aspirations to put one into a Spec but it's working at a pace of the QR23DE-T (sr20 crank).
VQT is already done, saw a dyno and sheets on it last night... over 390HP... A Nasty thing it is...
Traction is always going to be a problem... but its a blast as well..... If you love the car and ride bolt it and keep it comming... many said the same thing the first year or 2 of the the 2.0 Now look at it...
Time will tell and if Nissan is planning on the azeal in the next year or 2 with JWT doing the research and development of computor and turbo it will be crazy here in the near future for the 2.5.... keep your hope up and keep tunning the QR.... Only time will tell...
It really depends on how much money you are willing to spend.
Very little= no
middle= no
Lots= maybe, but be ready to pay even more.
this is the most straight forward way to put this. You drive a car with a truck engine, and truck engines are built for one thing. Good bottom end. therefore, when trying to get a high hp/high rpm application out of the QR25, you should expect the final price for engine work alone to go above 12,000 easily.
just wondering before i start working on my engine and start planning is it worthy of being tuned?
can it handle boost...or capable of gaining high HP?
i need some opinions...
if the engine isnt worthy.....is there a engine swap that is able to be put into the SpecV?
all opinions will be awesome
i need to start planning for this car
You can only go so fast on the street. The car responds decently to bolt ons for a NA 4 cylinder. How much power do you want? The max you can attain on a NA with traditional bolt ons and headwork is about 200 WHP and throughout the bolton process, you eliminate any potential problems. A FI app on stock internals handles about 250-280 WHP and is very streetable. A NA build is expensive because you would need to build the top and bottom end, get custom hardfaced camshafts, custom valvesprings, a valvetrain such as the Ferrara, high compression piston and rods, engine management (no SAFC is going to take care of this stuff) and expensive dyno tuning. Also, no one really knows how much the crankshaft is good for.
So my advice would be this. First, ensure all recalls have been performed. Make sure all 8 butterfly valve screws are intact and Loctite them. Be sure you are not burning oil and remove the stock midpipe, tap it and make sure no white dust comes out. Also do a UOA to be positive the pre catalyst is allright and that your engine is overall healthy (the Terry Dyson analysis is the best). Make sure your transmission is allright and then switch to a synthetic fluid if you have not already. If you ensure those, the 02s are not any more problem prone than other years and you are good to modify.
Ask anyone who knows jack crap about the engine and the first thing they will tell you is to remove the stock exhaust manifold hence eliminating the pre cat which is the biggest problem area. That is my suggestion for your first mod. From there, you can decide what means you want to go.
If this car ever drives anywhere
Linear Mode
