Sentra 1.8 126hp up to 150'ish hp?

[meoneal]

Greetings. I am new. About a year ago, I felt the urge to replace my 250k mi 91 celica gts with something a bit newer, and with less engine problems. Time to hit the dealership. I visted a friend and he helped me to get into my 2005 sentraS. I was feeling pretty good about the exchange. I wasnt looking for anything to boast about, and the used Sentra I bought was very clean, low milage, and a nice deal overall. So I had no plans on changing anything about it...... till my twin brother came to visit me. I sat down into his 07 Mazda3. As he started to accelerate on a back stretch of Arizona highway, I immediatly felt myself be put back into my seat. As the little Mazda hatchback was aproaching 120mph, the Speedometer needle tip turned blue, a 'ding' ding' ding' sound came through the speakers, and the rpm's kicked back a bit.... which told us that his Mazda3 had a Govern on it. .... bla Mazda's

The 1.8 QG18 engine is rated at 126hp, and by far its no dragster, and im not looking to make it into a dragster. But that Mazda3 has around 157hp stock, and I had found it to be quite impresive over the stock 1.8. So here is my question and project. I have decided to help my little 1.8 to get up to (or around to ) 150'ish hp, just for the little extra boost. By doing the Intake and Exhaust, is it possible to get an increase 24hp? Or are we talking about replacing the manifold, crank, add turbo,, etc?? Im not going to do alot to this little car. A friend did recomend that I do the basic 4... intake, exhaust, tires, suspension. So to take the 126 up to 150'ish, what would be the most resonable way of doing so??

Thanks

please, no arguments, or drama (hahaha, rice car,,,, my dadbetter than your dad,, etc)

[tristatesentra]

be honest with you on paper it says the 1.8 has 126hp but if you put it on the dyno its only 87whp and if you slap on a intake your'e only gaining 4 extra whp but on the 1/4 mile, this model does a 16.8 so that isn't too bad search the forums and see how you can get this car faster. are you opting to get turbo??

[meoneal]

I would, if need be. My finances aren't unlimited, so the more expensive a project, the more time it would take to see results.

My project is more or less to gain and additional 25hp. On the same back stretch of vacant highway, I was able to reach 105 or so mph. Im not sure if that is because I held the auto transmission to hit O/D, or if I was nearing the base Sentra's max performance.

If all I need to do to gain the 25hp that im looking for is to slap on a Turbo, that just seems too easy.

During my late nigh surf for an intake, I've read alot of pro and cons about the Fujita (spelling??) intake, and alot of ppl on youtube push for that item. But you just have to get past the flaming of other Sentra 1.8 Owners.

[nametakennow]

Intake, exhaust, and a header will get you close. There's also a throttle body spacer for the 1.8, I believe, and you may want to see if there are pullies out for it. Do a few searches, 1.8 options are fairly limited and I can't seem to remember what all is out there at the moment.

Welcome to NICO!

[meoneal]

The Throttle Body Spacer.. what is that exactly? I did a google search for that item, and saw what is appears to be, but as I am no guru under the hood, I am not sure how that would help with a bit of hp. Does it replace the seal that goes undernearth the TB?

I have found other forums about Intakes and such, and will keep ppl posted here on my findings. I also found a website that offers a turbo for the 1.8, but they were closed when i called them on this beautiful Sunday afternoon.

[nametakennow]

IMO a turbo is going to be awful expensive for what you get. Might as well trade up to an SE-R (or something else).

Anyway, a TB spacer is literally just a spacer (basically a thick gasket) between the TB and the intake manifold. I'm not 100% certain as to how it gains power, but my guess is that it's twofold.

First, it allows for a little more air to be actively in the manifold at any given time, so theoretically throttle response and initial power should be a little better.

Second, it lowers intake charge temperature by distancing the TB from the manifold, so the air is slightly more dense. I believe the material used for the spacer also dissipates heat to enhance this effect.

The same goes for an intake manifold spacer, which I believe they also have for the 1.8.

[VMPhil]

be honest with you on paper it says the 1.8 has 126hp but if you put it on the dyno its only 87whp and if you slap on a intake your'e only gaining 4 extra whp but on the 1/4 mile, this model does a 16.8 so that isn't too bad search the forums and see how you can get this car faster. are you opting to get turbo??

Co-signed but every car is like this. Nissans are fairly low though. for example a Honda Civic EX rated at 128hp dynos at 106, so roughly 22hp lost through the drive train. but the QG loses more, an average of 35 hp loss. same goes for the 02-06 Spec. 175hp crank 140ish at the wheel. Nissan over rates the low end cars by a few ponies id say.

[SHIFTVAX]

The intake spacers are designed to keep the intake manifold cooler by insulating the heat from the main block of the engine, cooler intake of air the more power; basically uses the same idea of a CAI. I saw a little gain with this, but not very noticeable, it has the bigger impact on large displacement engines, the QG18 is not big enough to show significant gains.

[meoneal]

k.. thanks everyone for the info

at the dealership that i work at, they brought in a 05 specV (which ive been pushing to sell). But for a similar price, we brought in 2 05 SS cobalts, which i think are very ergonomcal inside.

Anyone familiar with the cobalts??

[nametakennow]

Pretty quick cars. I don't think they're much on the handling front, though.

[VMPhil]

actually they handle fairly decent, motor trend did a track run (a year or so back) with several classes of cars and The Cobalt SS track time beat the Mustang GTs Track time because i was able to take corners at higher speeds than the Mustang surprisingly.