Alright well I had a bunch of threads I started but Alot of them could have been consolidated together to reduce forum memory usage. Also because there were so many, not all the ones I wanted could get sticky. So I figured if I make a thread that was more general so that I could fit more info into one sticky thread and possibly reduce the amount of threads asking for suggestions and a good place to buy and what not.
Let's start listing mods w/ the cycle of the engine, starting with the intake and ending with the exhaust.
Need I advise you these are bolt on mods, absolutely nothing internal.
Intake:
eBay Intake Pipping and MAF Adpt. (This is one of those very rare times I myself would use something made from eBay, but I have first hand exp. with them and they are pretty decent for there cost, there pretty identical to any other name brand intake besides the colors, filters, and no C.A.R.B sticker.)
**NOTE: Make sure you get the Pipping/Intake kit Specified for your Chassis, as I am not sure the Bends or Vacuum nipples are the same.
eBay Intake Pipping and MAF Adpt.: $15 to $25
Can be found Here
After seeing This Intake Filter Shootout, I've decided to Couple an Apexi Univ. Power Filter to the eBay intake. ALL MAF Adpt. are 3" or 76mm.
Apex'I 75mm Power Filter: $72
Can be found Here
Now also in that Filter Shootout, the K & N Filter came in 2nd, so I figured, why not put that in as an opt. also.
K&N 3" Cone filter: $38
Can be found Here
Although it was not in the Filter shoot out, I have used/seen these filters and seen go results on different apps.
Fujita 3" Filter (Similar Design to Apex'I): $44
Can be found Here
For those of you not diggin the eBay kits, well I got you covered :thumbsup
AEM: $160
S13 (DE) - S14
Injen: $187 - $191
S13 (E) - S13 (DE) - S14 (Z) - S14 (K)
Intake Thermal gasket: Tests have shown ~ 3-4hp increase after long term engine running.
Circuit Sports: $30
DE Only
Intake Manifold 101:
After market Intake Mani's and some good info
Omega Motive:
Price: $489
Designed with Mid-High Power In-Mind
Velocity Stacks
JGY Customs:
Price: $550
Designed with the KA-T In-Mind
Xcessive:
Price: $465
Single TB: Pre-Machined to Fit 70mm, But still use of Stock 60mm
Designed with the KA-T In-Mind
Also Good for Mid-High N/A Power
Xcessive:
Price: $785
GSX-R 750/1000 ITB's, Comes w/ plenum so you can still run MAF
Designed for Max response
Good for Mid-High Power
O and J Performance:
Price: $950
Sheet Metal
T6061 Aluminum
Now in when I was looking around from stuff on how to determine Intake Manifold sizing and what not. I came across some very interesting information that I thought I'd share.
IM = Intake Manifold
Determining IM Runner Length:
The general rule is that you should begin with a runner length of 178mm for a 10,000 rpm peak torque location, from the intake opening to the plenum chamber. You add 43mm to the runner length for every 1000 rpm that you want the peak torque to occur before the 10,000 rpm.
So, for instance, if peak torque should occur at 4,500 rpm the total runner length should be 178mm + (5.5 x 43mm) = 415mm.
Our Intake Runners are aprrox. ~430mm
Determining IM Runner Diameter:
You can calculate the ideal runner diameter by the equation:
SQRT [ (target rpm for peak torque x Displacement x VE) / (V x 18.5) ]
SQRT = square root
VE = Volumetric Efficiency in %
V is the velocity of the air flow in the IM plenum for resonance (usually estimated at 180 ft/sec max.)
Displacement in Liters (2.4)
ex.
So if we want peak torque at 4500 rpm at 65% VE for an KA, VE = 0.65
SQRT [(4500x 2.4L x 0.65 )/ (180 x 18.5)] = [(4500 x 2.4 x 0.65)/(3330)]
= 1.45 in. or 36.9 mm is the ideal runner diameter. (1 in = 25.4 mm)
Stock Intake Runner Dia. = 44.4 mm or 1.74 in (Ideal for 6500rpm)
Determining IM Plenum Size:
The plenum volume is critical on N/A engines, and a basic rule of thumb is: The smaller the plenum, the lower the rpm range, and bigger means higher rpm.
Determining TB Size:
The best way to find out if your TB is too small for your IM plenum is to determine what the intake manifold absolute pressure (MAP) sensor is reading (in the plenum) when you are at full throttle ( or wide open throttle (WOT) ) while the car is accelerating using a datalogger. The MAP should be equal to, or close to, atmospheric pressure. If it isn't or there is a MAP drop at WOT, then your TB is still too small.
Determining Intake Diameter Size:
The ideal diameter for an intake is when the intake has 25% more cross-sectional area than the TB's bore cross-sectional area . Your TB diameter (overbored or not) dictates your intake diameter.
ex. 60/25.4 = 2.4/100 = 0.024 x 25 = 0.6
add the 25% (0.6) to the original diameter(2.4)
2.4 + 0.6 = 3" or 76mm
This is what I came up with:
60mm Bore TB
76mm Ideal Intake Diameter
62mm Bore TB
76mm Ideal Intake Diameter
65mm Bore TB
82mm Ideal Intake Diameter
Determining Intake Length:
A suggested starting point for the length of a tube with peak torque at 6000 rpm is 13 in.
You add 1.7 in. for every 1000 rpm that you want to move the peak torque below 6000.
Or subtract 1.7 in. for every 1000 rpm you want to move the peak torque above 6000.
ex.
Peak Trq. we want 4500
6000 - 4500 = 1500
we want 1500 so 1.7 x 1.5 = 2.6
13 + 2.6 = 15.6 in is our Ideal Intake Legnth
Header:
Now I am pretty sure that all DOHC Headers are the same, Though I know that OBD-2 has a 2nd o2 sensor right before the the cat on the header. But if anything you can always cap the hole w/ something.
OBX: ~$165
Can be found at Sparktec Motorsports
eBay store link c an be found Here
or there real site:
S13 (DE) - S14
JDM Car Boy: $200 They seem to be reputable in the honda scene so why not give it a try?
S14 Only
S&S Header of AZ: $284
S14 Only
DC Sports: $341 - $333
S13 - S14
Pacesetter: $164 - $170
SOHC (70-1286) - DOHC (70-1288)
Spyder Auto: $189
89-90 - 91-94 - 95-98
BBP Racing Headers (Out of Business but still being sold)
89-90 - 91-94 - 95-98
Test Pipes:
**NOTE: Most Test pipes have the EGT sensor Bung for the SR's, but the pipe should also come with a bolt to cap it off, if not you will need to get something to seal the hole.
eBay: $5 - $50
Can be found Here
Advan-Emotion: $25
Can be found Here
Advanced JDM Parts: $25
Can be found Here
Hi-Flow Cats:
Cat-Co 3": $145
Can be found Here
Magnaflow (Size not Stated): $97
Can be found Here
Random Technology 3": $198
Can be found Here
CarSound (Size not Stated): $115
Can be found Here
Exhaust:
Limited to under $450 due to large selection
5Zigen Rocket 200: $415
S13 Only
Advanced JDM Parts: $138 - $173
S13: 1 2 3
S14: 1 2
Apexi GT Spec: $406
S14 Only
Apexi Nior: $447
S14 Only
Apex'I N1 Evolution: $435 - $450
S13 - S14
Apex'I Megaphone: $400 - $419
S13 - S14
Blitz NUR-Spec: (Rear Section/Muffler - **NOT CAT-BACK**) $374
S14 Only
Buddy Club Spec II: $332
S13 - S14
CXRacing: $200
S13 Only
Espelir JGT500: $440
S14 Only
GP Sports EXAS Spec D: $350
S13 - S14
GP Sports G-Four D II: $440
S13 - S14
Greddy PE II: $448
S13 Only
Greddy Ti-C: $448
S14 Only: Link 1 & 2
HKS Hi-Power: $371 - $449
S13 & S14 Both 65mm and 85mm
Hop-Up Racing 3": $265 - 279
S13 - S14
Intense Power: $295
S13 - S14
JIC Bullet 505S SUS (60mm): $450
S13 - S14
JVT-R: $399
S13 Only
Pacesetter Monza: $280
S13 Only
Pit N1 Style: $370
S13 - S14
Skunk2: $430
S13 Link 1 & 2 - S14 Link: 1 & 2
Tanabe Concept G: $450
S14 Only
Tanabe Super Medallion Racing: $418 - $443
S13 - S14
Top Speed N1: $320
S13 - S14
Updated: 5/19
*NOTE: All links that lead to GripMotorsports are not broken, the page url uses "~" which do not show up when you click on the link, just go and search for the product, it's there.
Let's start listing mods w/ the cycle of the engine, starting with the intake and ending with the exhaust.
Need I advise you these are bolt on mods, absolutely nothing internal.
Intake:
eBay Intake Pipping and MAF Adpt. (This is one of those very rare times I myself would use something made from eBay, but I have first hand exp. with them and they are pretty decent for there cost, there pretty identical to any other name brand intake besides the colors, filters, and no C.A.R.B sticker.)
**NOTE: Make sure you get the Pipping/Intake kit Specified for your Chassis, as I am not sure the Bends or Vacuum nipples are the same.
eBay Intake Pipping and MAF Adpt.: $15 to $25
Can be found Here
After seeing This Intake Filter Shootout, I've decided to Couple an Apexi Univ. Power Filter to the eBay intake. ALL MAF Adpt. are 3" or 76mm.
Apex'I 75mm Power Filter: $72
Can be found Here
Now also in that Filter Shootout, the K & N Filter came in 2nd, so I figured, why not put that in as an opt. also.
K&N 3" Cone filter: $38
Can be found Here
Although it was not in the Filter shoot out, I have used/seen these filters and seen go results on different apps.
Fujita 3" Filter (Similar Design to Apex'I): $44
Can be found Here
For those of you not diggin the eBay kits, well I got you covered :thumbsup
AEM: $160
S13 (DE) - S14
Injen: $187 - $191
S13 (E) - S13 (DE) - S14 (Z) - S14 (K)
Intake Thermal gasket: Tests have shown ~ 3-4hp increase after long term engine running.
Circuit Sports: $30
DE Only
Intake Manifold 101:
After market Intake Mani's and some good info
Omega Motive:
Price: $489
Designed with Mid-High Power In-Mind
Velocity Stacks
JGY Customs:
Price: $550
Designed with the KA-T In-Mind
Xcessive:
Price: $465
Single TB: Pre-Machined to Fit 70mm, But still use of Stock 60mm
Designed with the KA-T In-Mind
Also Good for Mid-High N/A Power
Xcessive:
Price: $785
GSX-R 750/1000 ITB's, Comes w/ plenum so you can still run MAF
Designed for Max response
Good for Mid-High Power
O and J Performance:
Price: $950
Sheet Metal
T6061 Aluminum
Now in when I was looking around from stuff on how to determine Intake Manifold sizing and what not. I came across some very interesting information that I thought I'd share.
IM = Intake Manifold
Determining IM Runner Length:
The general rule is that you should begin with a runner length of 178mm for a 10,000 rpm peak torque location, from the intake opening to the plenum chamber. You add 43mm to the runner length for every 1000 rpm that you want the peak torque to occur before the 10,000 rpm.
So, for instance, if peak torque should occur at 4,500 rpm the total runner length should be 178mm + (5.5 x 43mm) = 415mm.
Our Intake Runners are aprrox. ~430mm
Determining IM Runner Diameter:
You can calculate the ideal runner diameter by the equation:
SQRT [ (target rpm for peak torque x Displacement x VE) / (V x 18.5) ]
SQRT = square root
VE = Volumetric Efficiency in %
V is the velocity of the air flow in the IM plenum for resonance (usually estimated at 180 ft/sec max.)
Displacement in Liters (2.4)
ex.
So if we want peak torque at 4500 rpm at 65% VE for an KA, VE = 0.65
SQRT [(4500x 2.4L x 0.65 )/ (180 x 18.5)] = [(4500 x 2.4 x 0.65)/(3330)]
= 1.45 in. or 36.9 mm is the ideal runner diameter. (1 in = 25.4 mm)
Stock Intake Runner Dia. = 44.4 mm or 1.74 in (Ideal for 6500rpm)
Determining IM Plenum Size:
The plenum volume is critical on N/A engines, and a basic rule of thumb is: The smaller the plenum, the lower the rpm range, and bigger means higher rpm.
Determining TB Size:
The best way to find out if your TB is too small for your IM plenum is to determine what the intake manifold absolute pressure (MAP) sensor is reading (in the plenum) when you are at full throttle ( or wide open throttle (WOT) ) while the car is accelerating using a datalogger. The MAP should be equal to, or close to, atmospheric pressure. If it isn't or there is a MAP drop at WOT, then your TB is still too small.
Determining Intake Diameter Size:
The ideal diameter for an intake is when the intake has 25% more cross-sectional area than the TB's bore cross-sectional area . Your TB diameter (overbored or not) dictates your intake diameter.
ex. 60/25.4 = 2.4/100 = 0.024 x 25 = 0.6
add the 25% (0.6) to the original diameter(2.4)
2.4 + 0.6 = 3" or 76mm
This is what I came up with:
60mm Bore TB
76mm Ideal Intake Diameter
62mm Bore TB
76mm Ideal Intake Diameter
65mm Bore TB
82mm Ideal Intake Diameter
Determining Intake Length:
A suggested starting point for the length of a tube with peak torque at 6000 rpm is 13 in.
You add 1.7 in. for every 1000 rpm that you want to move the peak torque below 6000.
Or subtract 1.7 in. for every 1000 rpm you want to move the peak torque above 6000.
ex.
Peak Trq. we want 4500
6000 - 4500 = 1500
we want 1500 so 1.7 x 1.5 = 2.6
13 + 2.6 = 15.6 in is our Ideal Intake Legnth
Header:
Now I am pretty sure that all DOHC Headers are the same, Though I know that OBD-2 has a 2nd o2 sensor right before the the cat on the header. But if anything you can always cap the hole w/ something.
OBX: ~$165
Can be found at Sparktec Motorsports
eBay store link c an be found Here
or there real site:
S13 (DE) - S14
JDM Car Boy: $200 They seem to be reputable in the honda scene so why not give it a try?
S14 Only
S&S Header of AZ: $284
S14 Only
DC Sports: $341 - $333
S13 - S14
Pacesetter: $164 - $170
SOHC (70-1286) - DOHC (70-1288)
Spyder Auto: $189
89-90 - 91-94 - 95-98
BBP Racing Headers (Out of Business but still being sold)
89-90 - 91-94 - 95-98
Test Pipes:
**NOTE: Most Test pipes have the EGT sensor Bung for the SR's, but the pipe should also come with a bolt to cap it off, if not you will need to get something to seal the hole.
eBay: $5 - $50
Can be found Here
Advan-Emotion: $25
Can be found Here
Advanced JDM Parts: $25
Can be found Here
Hi-Flow Cats:
Cat-Co 3": $145
Can be found Here
Magnaflow (Size not Stated): $97
Can be found Here
Random Technology 3": $198
Can be found Here
CarSound (Size not Stated): $115
Can be found Here
Exhaust:
Limited to under $450 due to large selection
5Zigen Rocket 200: $415
S13 Only
Advanced JDM Parts: $138 - $173
S13: 1 2 3
S14: 1 2
Apexi GT Spec: $406
S14 Only
Apexi Nior: $447
S14 Only
Apex'I N1 Evolution: $435 - $450
S13 - S14
Apex'I Megaphone: $400 - $419
S13 - S14
Blitz NUR-Spec: (Rear Section/Muffler - **NOT CAT-BACK**) $374
S14 Only
Buddy Club Spec II: $332
S13 - S14
CXRacing: $200
S13 Only
Espelir JGT500: $440
S14 Only
GP Sports EXAS Spec D: $350
S13 - S14
GP Sports G-Four D II: $440
S13 - S14
Greddy PE II: $448
S13 Only
Greddy Ti-C: $448
S14 Only: Link 1 & 2
HKS Hi-Power: $371 - $449
S13 & S14 Both 65mm and 85mm
Hop-Up Racing 3": $265 - 279
S13 - S14
Intense Power: $295
S13 - S14
JIC Bullet 505S SUS (60mm): $450
S13 - S14
JVT-R: $399
S13 Only
Pacesetter Monza: $280
S13 Only
Pit N1 Style: $370
S13 - S14
Skunk2: $430
S13 Link 1 & 2 - S14 Link: 1 & 2
Tanabe Concept G: $450
S14 Only
Tanabe Super Medallion Racing: $418 - $443
S13 - S14
Top Speed N1: $320
S13 - S14
Updated: 5/19
*NOTE: All links that lead to GripMotorsports are not broken, the page url uses "~" which do not show up when you click on the link, just go and search for the product, it's there.
