NA Hp improvements
 

I just orderd a bunch of shit for my rx8. Parts include agency power underdrive pulley, racing beat headers, aluminum waterpump and alternater pulleys, and racing beat revi intake system. Im going to dyno my 8 in the next two days, then once more after a get all the parts in and installed. Ill post up some results if anyone is interested. I'm hopein for 10-15 hp, sharp looks, and better sound. (even bought blue hoses... felt like blowin money) Ill be sure to post some pictures as well.

I'm sure you'll get 2/3 of what your looking for...:fingersx:

well I have particulary high hopes for the underdrive pulley. The company claims roughly 9 hp, they even have dyno sheets. I would be satisfied with half that.

cool ill be looking forward to your results...

Supposedly pulleys won't do much, despite the dyno sheets they provide, but here's hoping you get some good gains!

how much $ did you drop? lol

im too lazy to search myself so.... you should tell me?

:) :) :)

please?

Oh and take your cat out for a midpipe to see some more gains.

I got the SR motorsports pulley, the butt dyno felt a difference, not sure how much though.

gee, nobody ever did any of this before ....

Should have searched better and made wiser purchases, like an accessport and getting your car tuned, and a mid pipe....mods that will actually give you power.

But hey sounds like you have money just sitting around so nock yourself out. Looking forward to hearing your disapointment.

Oh and unless you can dyno your car, install your new parts, and then dyno you car again on the same day on the same dyno your comparison is pointless.

Yea first time seeing someone try this, catching up through 5 pages of post and this was the most original one. :rolleyes:

You know that the Agency Power dyno charts on that site are doctored right... I have one of these pullies but only because I got it REALLY cheap and it makes rev-match downshifting easier on the track, when there's no load on the engine you feel a huge difference. For me, it didn't yield a measurable difference on the DYNO at all. Maybe 1HP but variance between pulls is usually a couple HP anyways.

With those parts you listed I'll guess it's going to be less than 10HP. If you want to make an actual difference you should get an Accessport and a midpipe.

That plus tires= money well spent.

wow dood stop haten. :icon_tdow wait till he sees what the car does with just the parts he added.. tuning and Mid Pipe would would help the best and tie things together more and that should be the next thing he does with the car really..

^ You know he isn't the first person to do these mods, right?

He isn't hating, just pointing out that we know what to expect from these mods, and the only item that can improve power production is the header, and then not by much unless it's properly matched to a full exhaust all the way to the tips.

Pulleys never add power. Never. An engine will make the same amount of power with OEM vs underdrive vs lightweight, etc...

Changing the pulleys just changes drivetrain losses slightly. Sometimes for the good, often not. Most underdrive pulleys for the 8 end up making it so that the alternator can't actually charge the battery, so you need to keep it on a battery tender pretty much every night, or deal with constant jumps.


It's not hating to simply tell the truth of what we know about our cars.

Midpipes are great for a few gains, but god that smell man...lol

theres not much to know really, there isnt much we can do to a NA rx8 without FI or adding 1 or 2 more of the spinny triangles.

be sure and let us know when you get the same results as thousands of people before you have ....

Hey - let's give the guy a break for one good choice (well, the headers too)! At least the Revi is good for a couple HP, according to RB ...

Stock vs Racing Beat

REVi Intake Adds An Average 1.95 HP Over The Stock System - 2000-8900 RPM Range

Peak RPM Gains Over Stock - 3.5 HP @ 8300 RPM

Maximum Power Gain Over Stock - 5.8 HP @ 8900 RPM