Performance Mods and its effectiveness
#16
Lead Lap
iTrader: (13)
1. Exhaust mod you gain about 20 on the dyno and it does show on the drag strip. Caymandive can attest to that. Yes the exhaust mod is mainly a sound mod with some gains.
2. Intake is mainly a sound mod...check FIGS intake comparison thread and you will see what is the best. I would either keep it stock or get Joe Z or the ICode tube.
3. Headers, the best mod for power for our engines. Your looking at 30-40 hp gain. I would start with this mod if u want to make the car faster without changing the sound of stock.
2. Intake is mainly a sound mod...check FIGS intake comparison thread and you will see what is the best. I would either keep it stock or get Joe Z or the ICode tube.
3. Headers, the best mod for power for our engines. Your looking at 30-40 hp gain. I would start with this mod if u want to make the car faster without changing the sound of stock.
#17
Lexus Test Driver
#18
Not to discourage but I would recommend against the K&N filter the way they trap dirt is using oil. This oil over time coats the sensors on the MAF which could lead to degradation and performance drop off. In other cars, it has even caused the sensor to die and malfunction. The aFe Pro Dry filters flow better and filter more particulates out in an couple different independent studies. Just my $0.02 feel free to look into this yourself.
#20
Lead Lap
iTrader: (1)
Anxiouz,
Have you dyno'd your car? I'm wondering how much the Borla axle back give by getting rid of the squashed y section. I have the Borla cat back. I installed it myself for a day and took it off cause it was too loud for me. I am wondering if I should get hi flow cats welded into the initial section and put it back on versus selling it. The other option is to get the axle back. I'll bet headers and an axle back are synergistic and not much less than headers with cat back and welded in hiflow cats. Then you retain the secondary cats and have more sound from the headers and axle back.
How much louder is your axle back than stock?
Have you dyno'd your car? I'm wondering how much the Borla axle back give by getting rid of the squashed y section. I have the Borla cat back. I installed it myself for a day and took it off cause it was too loud for me. I am wondering if I should get hi flow cats welded into the initial section and put it back on versus selling it. The other option is to get the axle back. I'll bet headers and an axle back are synergistic and not much less than headers with cat back and welded in hiflow cats. Then you retain the secondary cats and have more sound from the headers and axle back.
How much louder is your axle back than stock?
did you experience any drone?
#21
Lead Lap
iTrader: (9)
With the Borla axle-back there is some drone but it's only under partial throttle at certain rpms (the magic 1800-2200rpm or so range). But it may not be drone...it's just a little loud/boomy. But by no means is it a monster. I had a cop behind me today and they paid me no mind.
Cayman one suggested that the midpipe design of the Borla cat-back actually helps with the drone. Based on what he described I think that's plausible.
I've heard the ISS, Joe Z, and Borla in person and I'd rank them in that order for sound volume, high to low.
And FWIW, at WOT I hear the (stock) intake growl more than I hear my exhaust.
Cayman one suggested that the midpipe design of the Borla cat-back actually helps with the drone. Based on what he described I think that's plausible.
I've heard the ISS, Joe Z, and Borla in person and I'd rank them in that order for sound volume, high to low.
And FWIW, at WOT I hear the (stock) intake growl more than I hear my exhaust.
#22
1. Exhaust mod you gain about 20 on the dyno and it does show on the drag strip. Caymandive can attest to that. Yes the exhaust mod is mainly a sound mod with some gains.
2. Intake is mainly a sound mod...check FIGS intake comparison thread and you will see what is the best. I would either keep it stock or get Joe Z or the ICode tube.
3. Headers, the best mod for power for our engines. Your looking at 30-40 hp gain. I would start with this mod if u want to make the car faster without changing the sound of stock.
2. Intake is mainly a sound mod...check FIGS intake comparison thread and you will see what is the best. I would either keep it stock or get Joe Z or the ICode tube.
3. Headers, the best mod for power for our engines. Your looking at 30-40 hp gain. I would start with this mod if u want to make the car faster without changing the sound of stock.
How much of a noise increase is there with the Sikky Header?
#24
have you heard any of the other catback systems in person? (joe z, iss forged) if so, was the borla on par, louder, quieter than those systems? i actually have the borla catback arriving this monday and was worried it would be too quiet compared to the other two. (so, your comment has gotten me excited haha)
did you experience any drone?
did you experience any drone?
Could not tell you about the drone cause I was too busy tailgating loud trucks to blend in during my commute. Was worried about getting pulled over. I have heard Joe Z and they sounds really nice.
#25
11 Second Club
iTrader: (2)
With the Borla axle-back there is some drone but it's only under partial throttle at certain rpms (the magic 1800-2200rpm or so range). But it may not be drone...it's just a little loud/boomy. But by no means is it a monster. I had a cop behind me today and they paid me no mind.
Cayman one suggested that the midpipe design of the Borla cat-back actually helps with the drone. Based on what he described I think that's plausible.
I've heard the ISS, Joe Z, and Borla in person and I'd rank them in that order for sound volume, high to low.
And FWIW, at WOT I hear the (stock) intake growl more than I hear my exhaust.
Cayman one suggested that the midpipe design of the Borla cat-back actually helps with the drone. Based on what he described I think that's plausible.
I've heard the ISS, Joe Z, and Borla in person and I'd rank them in that order for sound volume, high to low.
And FWIW, at WOT I hear the (stock) intake growl more than I hear my exhaust.
Right after that test drive we went out in my car and he was pleasantly surprised how mine sounded. At the same speeds we tried to induce the drone and what we get is noticeably louder exhaust, but with a deeper burble to it without the annoying drone. So my original thought about the axle-back being more droney was right. A full exhaust certainly adds more decibels to the car, but it does cover up/balance out the drone that is noticeable when doing just the Borla axle-back.
#27
Driver School Candidate
Join Date: Jan 2009
Location: MA
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Not to discourage but I would recommend against the K&N filter the way they trap dirt is using oil. This oil over time coats the sensors on the MAF which could lead to degradation and performance drop off. In other cars, it has even caused the sensor to die and malfunction. The aFe Pro Dry filters flow better and filter more particulates out in an couple different independent studies. Just my $0.02 feel free to look into this yourself.
To G9N
I've wondering about that - oil coating the sensor on MAF - myself (I just installed the K&N filter insert and collected about 1000 miles). My own experience with K&N filters in my RX300 has been mixed. I might switch to this: http://vipautosalon.com/store/index....-in-air-filter
To G9N
I've wondering about that - oil coating the sensor on MAF - myself (I just installed the K&N filter insert and collected about 1000 miles). My own experience with K&N filters in my RX300 has been mixed. I might switch to this: http://vipautosalon.com/store/index....-in-air-filter
#28
Lead Lap
iTrader: (9)
caymandive = Every post is informative and useful as always. Thanks again.
FWIW I've decided to remove my Borla axle-back and go back to stock temporarily so that I can sell the Borla (I'm in the OC 92808 if you're interested). I'm digging the ISS DES cat-back look and sound but also considering the JoeZ since it's local.
Overall I thought the Borla axle-back definitely added some grunt but I haven't been generally pleased with the interior sound. It sounds awesome outside the car but I need to enjoy it inside too! It's just not wow-ing me, although it's probably personal preference.
The startup does sound mean as hell though.
FWIW I've decided to remove my Borla axle-back and go back to stock temporarily so that I can sell the Borla (I'm in the OC 92808 if you're interested). I'm digging the ISS DES cat-back look and sound but also considering the JoeZ since it's local.
Overall I thought the Borla axle-back definitely added some grunt but I haven't been generally pleased with the interior sound. It sounds awesome outside the car but I need to enjoy it inside too! It's just not wow-ing me, although it's probably personal preference.
The startup does sound mean as hell though.
#29
If you guys really want power out of normally aspirated engine I would say
1. Headers - More flow = More power
2. Cam - bigger cam will change engine power
3. Pullys underdrive pully wind up faster get torque band faster
4. Intake you need more air into engine somehow
5. Exhaust more flow. more power
6. ECU tune to take advantage of all mods. Dyno tune is way to go for custom ecu mapping.
Just my two cents for a Lexus RX owner
1. Headers - More flow = More power
2. Cam - bigger cam will change engine power
3. Pullys underdrive pully wind up faster get torque band faster
4. Intake you need more air into engine somehow
5. Exhaust more flow. more power
6. ECU tune to take advantage of all mods. Dyno tune is way to go for custom ecu mapping.
Just my two cents for a Lexus RX owner