willsrx

Everyone on the forum says that you will get minimal gains with a racing beat intake but RX tuner magazine tested it in this article and says that he got 10 hp at 6750 rpms. Why the discrepancy?

RazzyBRX-8

is 10 hp a lot for an intake?

Everyone says the only way to get a significant power increase is through forced induction. I honestly believe them.

willsrx

They are saying everywhere on this forum that max gains are very minimal with a intake, like 2-3 hp. If I can expect 10 hp from the intake I will be ordering 1 right away.

army_rx8

10hp is a lot for an intake...especially with our car. the discrepancy is most likely where people are looking in the rev range when they talk abotu gains...most people look for top end power (that is where the bigger numbers are)...but you feel and can use more power in the low to mid range. the revi only adds like 3.5 or 4 at the top end..but it helps out more in the low-mid range. racing beat said this when the first came out with the revi (i believe don't quote me it's been a while)....it'll add 3.5 at the top end...but you'll be pleasently surprised int eh rest of the rev range....or something to that effect.

so hopfully that made some sense

therm8

that's because alot of people are brainwashed by peak hp.

Fanman

Yeah, Polak did that test, but also if you read the article he had installed a lightweight flywheel, that probably opened up a few ponies right there too. Import Tuner did a "Power Pages" test and got like 4 hp from the REVi alone...didn't have the RAM Air Duct yet.

Moostafa29

I don't think the RAM Air Duct was available when Polak tested, but I could be wrong on that. If so, then there may be a few more gains to be had.

rotarygod

The benefit of the ram air duct should really only be seen with the car moving. Just sitting on a dyno it shouldn't add anything. Dyno's can't measure real world usable power very well as you aren't in a real world driving situation. Their biggest benefit is for comparison to show changes but even then it is sometimes limited such as in the case of ram air.

TeamRX8

iTrader: (25)

lol, my dyno can outrun your dyno ...

crimson-rain

I wonder why nobody has tried the AEM CAI or MS CAI (probably too new)?

r0tor

iTrader: (1)

if i remember right, the 10hp gain was a result of a random blip in the dyno that only showed up on 1 out of the 4 dyno runs... then gain was more in the 5whp range

dmp

AVERAGE HP folks...Peaks are for mountains and junk.

OVER-ALL the Intake provides SOLID gains.

Fanman

Was discussed before Rotor by you & me, even POLAK who did the runs and he stated the other runs produced 7 & 9 hp gains in the rev range. If you said 5 hp because that is what Import Tuner got that's fine but stop with this "random blip" BS. "Random blip" was repeated making it a dynoed result. If your going to start this again we may as well kill the thread right here again, before the RB hatin' starts.

Their claims are in line to what has been shown in seperate dynoes (From RB website):

"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"

r0tor

iTrader: (1)

The fact of the matter remains the 10hp increase was at 6755 rpms where the stock power was 166 and revi in 5th gear on that run was 176. If you look, the teriary ports on that revi run opened before they otherwise should have, hence you have the dyno blip at an earlier rpm, and a 10hp "gain".

The next dyno shows revi in third gear and 168 hp at 6867 rpms. The last dyno shows revi+exhaust+flywheel+clutch and 179hp at 6867 rpms.

https://www.rx8club.com/showthread.p...highlight=REVi

Fanman

I'll believe Polak, the guy who actually did the tests, who came on & explained the differences, and stated the results (7, 9 & 10 hp gains). The original test was done in 5th gear back to back (car & car with RB Revi), while the 2nd test was done with car & RB Revi, then car taken off, tranny dropped flywheel & clutch added & in 3rd gear. Not exactly a job where you can leave the car on the dyno for best repeatability.