Who makes J-pipes and what's the power/price?
#121
How much power can I expect from XLR8's J-pipe if:
A. I leave everything else stock?
10-15 HP and 15-20 TQ
B. Add Hi-flow cats w/ stock exhaust?
We only offer a high flow third cat, which will probably add 3-4 HP.
C. Add straight pipes w/ stock exhaust?
UNSURE
D. Add exhaust with cats stock?
10 HP/TQ
E. Add exhaust w/ hi-flow cats?
UNSURE SINCE WE DO NOT PRODUCE HIGH FLOW PRE-CATS
F. Add exhaust w/ Straight pipes?
UNSURE
G. Is it even worth it to change mufflers while leaving stock piping and what if anything can one expect to gain (HP/TQ) from that??
UNSURE
We do not produce just mufflers, nor just straight pipes so we are unsure of the exact gains of these modifications. Also, each car responds different to our modifications and each dyno will report differently.
A. I leave everything else stock?
10-15 HP and 15-20 TQ
B. Add Hi-flow cats w/ stock exhaust?
We only offer a high flow third cat, which will probably add 3-4 HP.
C. Add straight pipes w/ stock exhaust?
UNSURE
D. Add exhaust with cats stock?
10 HP/TQ
E. Add exhaust w/ hi-flow cats?
UNSURE SINCE WE DO NOT PRODUCE HIGH FLOW PRE-CATS
F. Add exhaust w/ Straight pipes?
UNSURE
G. Is it even worth it to change mufflers while leaving stock piping and what if anything can one expect to gain (HP/TQ) from that??
UNSURE
We do not produce just mufflers, nor just straight pipes so we are unsure of the exact gains of these modifications. Also, each car responds different to our modifications and each dyno will report differently.
#122
I didn't really notice any gains with a RV6 V3 on an otherwise stock TL-S 6MT.
The cars to the floor all the time, but I rarely go above 3-4K. I'd think 10HP and 15 FT/LB would be noticeable.
Are all the direct before and after stock dynos on base TL's?
The cars to the floor all the time, but I rarely go above 3-4K. I'd think 10HP and 15 FT/LB would be noticeable.
Are all the direct before and after stock dynos on base TL's?
#123
from 5k-7k RPM.
I dynoed my six speed and found; while the jpipe adds power throughout the powerband, vtec range is increased.
so if you're only driving below vtec...you're not gonna get the "push you back in the seat" feel.
also, it takes about 30 horses to "feel" in a 3500lbs car.
#124
I'm not talking about a 'push back in the seat' feel, the car is slow at any RPM and gear. I assumed I might notice some difference, and a few people were making amazing claims of massive low end torque improvements, which is what I was after.
I'm not complaining, just saying I didn't really notice any difference in how the car drives. It might make more high end power, but thats not really that useful for daily driving unless you drive in 2nd.
I'm not complaining, just saying I didn't really notice any difference in how the car drives. It might make more high end power, but thats not really that useful for daily driving unless you drive in 2nd.
#125
I'm not talking about a 'push back in the seat' feel, the car is slow at any RPM and gear. I assumed I might notice some difference, and a few people were making amazing claims of massive low end torque improvements, which is what I was after.
I'm not complaining, just saying I didn't really notice any difference in how the car drives. It might make more high end power, but thats not really that useful for daily driving unless you drive in 2nd.
I'm not complaining, just saying I didn't really notice any difference in how the car drives. It might make more high end power, but thats not really that useful for daily driving unless you drive in 2nd.
unfortunately, people are always going to exaggerate on their findings. Just the nature of the beast.
thats why its important to add facts, instead of basing on what you "feel"
#127
I'm not talking about a 'push back in the seat' feel, the car is slow at any RPM and gear. I assumed I might notice some difference, and a few people were making amazing claims of massive low end torque improvements, which is what I was after.
I'm not complaining, just saying I didn't really notice any difference in how the car drives. It might make more high end power, but thats not really that useful for daily driving unless you drive in 2nd.
I'm not complaining, just saying I didn't really notice any difference in how the car drives. It might make more high end power, but thats not really that useful for daily driving unless you drive in 2nd.
You wanna really feel that your car is faster, you're going to need to do full bolt ons, maybe do lighter wheels/tires and knock off a couple hundred pounds. (Not that hard considering all the performance bolt ons drop significant weight, ie: pulley, cai, all exhaust mods, suspension, wheels, battery, etc.) Lose the heat shields, underhood covers, spare, tools, rear mats, etc. Even then it's not going to blow you away, especially if you do it little by little, over an extended period of time.
#130
got any vids?
#131
#132
Forget all these dyno claims... Can anyone chime in with personal experience of installing a jpipe....any brand...and then tell us if they DID or DID NOT actually subjectively feel that their car was faster or not?
I don't care if it makes 10 hp, or 15hp on some dyno...as others have said, those charts can be manipulated.... But bolting a part on and then going for a drive... The cars owner will immediately know if the car gained power or not....
Thx
I don't care if it makes 10 hp, or 15hp on some dyno...as others have said, those charts can be manipulated.... But bolting a part on and then going for a drive... The cars owner will immediately know if the car gained power or not....
Thx
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MrHeeltoe (02-01-2013)
#133
^not really.
your mind plays tricks on you.
install a cold air intake and you automatically think you're faster.
Hence the term BUTT Dyno.
however; I did benchmark.
I raced my friend - both of us stock.
and then when I bolted on the jpipe; I did pull in third gear.
your mind plays tricks on you.
install a cold air intake and you automatically think you're faster.
Hence the term BUTT Dyno.
however; I did benchmark.
I raced my friend - both of us stock.
and then when I bolted on the jpipe; I did pull in third gear.
#134
From my experiences in the past with modding every vehicle ive ever owned, 1 mod, other than a SC or turbo, wont make much difference that you will feel right a way. But its the multiple mods that make the difference. like the J pipe, add a catback and you now have 20-25 hp gain. if you really want extreme hp you gotta start out with a high hp motor. cant expect 1000hp from a TL
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zachlone (01-31-2013)
#137
#139
he does have lighter wheels than I have.
I think with tires and wheels he's sitting somewhere at 30pounds per corner, while Im at 40lbs per corner.
his car is also an 05.
we're both 6mt.
But in 06 the ECU received changes... for the loss.
the 04s and 05s have a more aggressive timing than the 06.
we'll be neck and neck.
when I hit 3rd gear, it takes me a few seconds to pull.
I think with tires and wheels he's sitting somewhere at 30pounds per corner, while Im at 40lbs per corner.
his car is also an 05.
we're both 6mt.
But in 06 the ECU received changes... for the loss.
the 04s and 05s have a more aggressive timing than the 06.
we'll be neck and neck.
when I hit 3rd gear, it takes me a few seconds to pull.
#140
Racing comparisons are almost as bogus as butt dynos as empirical evidence of power production. There are too many variables and such that come into play.
Dynos are proving to be equally misleading unfortunately.
Honestly, all the pipes make power. And you can definitely feel it.
Dynos are proving to be equally misleading unfortunately.
Honestly, all the pipes make power. And you can definitely feel it.
#141
Forget all these dyno claims... Can anyone chime in with personal experience of installing a jpipe....any brand...and then tell us if they DID or DID NOT actually subjectively feel that their car was faster or not?
I don't care if it makes 10 hp, or 15hp on some dyno...as others have said, those charts can be manipulated.... But bolting a part on and then going for a drive... The cars owner will immediately know if the car gained power or not....
Thx
I don't care if it makes 10 hp, or 15hp on some dyno...as others have said, those charts can be manipulated.... But bolting a part on and then going for a drive... The cars owner will immediately know if the car gained power or not....
Thx
Then in '11, I added the HFPC's and felt a bit more, but not down low like with the J/race pipes. I felt the HFPC's more from 5.5k and up. It wasn't running out of breath from 6-6.8k anymore.
In '12, I added lighter wheels and tires (10 lbs per corner) and didn't feel any real difference other than quicker handling; more of a dynamic feel than anything.
Then did the 3.7 TL-SHAWD manifold/bored ZDX TB/ported lower runners, and again, like with the HFPC's felt a difference in the upper part of the power band, but nothing down low. At this point, the car feels like it wants to keep pulling past redline. Time for a 4" intake and cams!
So, to re-cap, the J/race pipes definitely gave me the most noticeable gain down low, but I'm not sure it would be the same on a bone stock car, being as that I already had the CAI, pulley and cat back.
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