JDM/USDM Specifications comparisons? True JDM Parts stores?
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From: Awatukee, AZ, 85044
JDM/USDM Specifications comparisons? True JDM Parts stores?
How do the JDM Prelude SiR and the USDM Prelude SH compare? I'm interested in importing a '98 JDM prelude, and want to know the differences in such things as Weight, HP/Trq, and any other interesting things that I'm simply too stupid to remember to ask about right now....
Also, how difficult would it be to find aftermarket parts for the JDM SiR? Any places I could check out for prices?
Also, how difficult would it be to find aftermarket parts for the JDM SiR? Any places I could check out for prices?
Joined: Aug 2002
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From: Flushing, NY, USA
Re: JDM/USDM Specifications comparisons? True JDM Parts stores? (scorched0)
JDM SiR and USDM Type SH have the same engine except JDM SiR doesn't have the ATTS. JDM Type S would be only one that have the ATTS plus 20 more horsepower than regular SiR. I heard that the the JDM SiR S-spec have the same engine as Type S but not 100% sure on that one.
As for aftermarket parts, JDM and USDM H22A engine doesn't have much difference. JDM Type S have a higher compression piston than USDM Type SH and JDM SiR, plus Type S cylinder head is already ported, bigger throttle body, different intake manifold, more aggressive camshafts, different valvetrain, less restrictive header and exhaust, plus with Japan's higher octane gas than the U.S, JDM Type S have 220hp.
Mugen makes their aftermarket performance parts fit for JDM or USDM Prelude and other Hondas.
As for aftermarket parts, JDM and USDM H22A engine doesn't have much difference. JDM Type S have a higher compression piston than USDM Type SH and JDM SiR, plus Type S cylinder head is already ported, bigger throttle body, different intake manifold, more aggressive camshafts, different valvetrain, less restrictive header and exhaust, plus with Japan's higher octane gas than the U.S, JDM Type S have 220hp.
Mugen makes their aftermarket performance parts fit for JDM or USDM Prelude and other Hondas.
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From: EXIT Real World
Re: JDM/USDM Specifications comparisons? True JDM Parts stores? (HondaTypeS)
I heard that the the JDM SiR S-spec have the same engine as Type S but not 100% sure on that one.
Some exterior differences between the two are; wing, rims, and front lip
blabbity blah...
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From: Flushing, NY, USA
Re: JDM/USDM Specifications comparisons? True JDM Parts stores? (Mario)
I heard that the the JDM SiR S-spec have the same engine as Type S but not 100% sure on that one.
The S Spec shares the same motor & upgrades as the Type S but does not have ATTS or traction control. Instead, it utilizes a more common helical LSD.
Some exterior differences between the two are; wing, rims, and front lip
blabbity blah...
The S Spec shares the same motor & upgrades as the Type S but does not have ATTS or traction control. Instead, it utilizes a more common helical LSD.
Some exterior differences between the two are; wing, rims, and front lip
blabbity blah...
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From: EXIT Real World
Re: JDM/USDM Specifications comparisons? True JDM Parts stores? (HondaTypeS)
I don't think Type S have traction control either. Type S have ATTS and LSD.
Yes, Type S has traction control. It uses the ABS sensors in conjuction with the ATTS unit. I know I have the honda diagram in my harddrive somewhere...
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From: Knoxville, TN, United States
Re: JDM/USDM Specifications comparisons? True JDM Parts stores? (Mario)
The type-s preludes are built with differences that are both big and small, but altogether make a better performing machine. The list of type-s motor parts that i have i got from looking at other preludes compared to mine are. Pistons, piston rings, valve springs, camshaft, valve cover, ignition wire cover w/bolts, intake manifold(A,B), bypass valve body, valve packing, intake camshaft, exhaust cam shaft, exhaust manifold, conrod set, throttle body. There are also the emblems and body parts like: Type-s emblem, guage bezel, emblem for grill, front lower spoiler, halogen fog lamps, side garnish guards, titanium shift ****, side markers, s-spec sticker, ATTS emblem, sports grill, mirror lenses, pedal set, E brake handle, bumper lenses, recon pole and, back up sensors (front and back). This is the best list that I have. I have only seen two full type-s conversions and one that is claimed to be for real.
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From: Flushing, NY, USA
Re: JDM/USDM Specifications comparisons? True JDM Parts stores? (Mario)
I don't think Type S have traction control either. Type S have ATTS and LSD.
You can't have both ATTS and LSD. It's either one or the other.
Yes, Type S has traction control. It uses the ABS sensors in conjuction with the ATTS unit. I know I have the honda diagram in my harddrive somewhere...
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From: EXIT Real World
Re: JDM/USDM Specifications comparisons? True JDM Parts stores? (HondaTypeS)
Why can't you have ATTS and LSD together? I'm in the market to get a JDM Type S engine and all the places that I found selling the JDM Type S engine, they're all said that Type S have ATTS and LSD.
In addition, can you direct me to a manufacturer that has an LSD application for the Type SH or Type S? Cusco, no. Kazz, no. Quaife, no.
ATTS and LSD work differently, I can't understand why can't you have both.
So, if you wanted a functioning ATTS from a JDM Type S engine, you better make a trip to your honda dealer and buy everything else mentioned above.
Furthermore, since the ATTS unit is located between the differential and left halfshaft, a hard left hand turn would lead to the transfer of power to the right (outside) front tyre back through the actual differential (within the tranny) itself.
Well, (for argument's sake) if there was an LSD unit in there...the LSD, since purely mechanical will interpret the transfer of torque from the ATTS as the left (inside) tyre spinning too fast. And doing it's job, the LSD will then send more power to the outside wheel. Basically monkey wrench-ing the whole calibration that has been computed by the ATTS unit.
In the end, those two things just simply do NOT work in unison.
Feel free to try though, i'm curious to read the write-up.
Joined: Aug 2002
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From: Flushing, NY, USA
Re: JDM/USDM Specifications comparisons? True JDM Parts stores? (Mario)
Why can't you have ATTS and LSD together? I'm in the market to get a JDM Type S engine and all the places that I found selling the JDM Type S engine, they're all said that Type S have ATTS and LSD.
Yeah, sorry to tell you that your sources are either; A. unreliable, or B. dishonest, or C. just plain ignant (read. Ignorant).
In addition, can you direct me to a manufacturer that has an LSD application for the Type SH or Type S? Cusco, no. Kazz, no. Quaife, no.
ATTS and LSD work differently, I can't understand why can't you have both.
ATTS does exactly what an LSD would do. However, instead of it being purely mechanical (like the LSD) to determine the distribution and or amount of torque to be transferred to the outside wheel, ATTS uses an array of sensors (yaw rate, steering angle, it's own computer, blah, blah, etc.) to aid it's distribution. Basically, its a more sophisticated form of a limited slip differential.
So, if you wanted a functioning ATTS from a JDM Type S engine, you better make a trip to your honda dealer and buy everything else mentioned above.
Furthermore, since the ATTS unit is located between the differential and left halfshaft, a hard left hand turn would lead to the transfer of power to the right (outside) front tyre back through the actual differential (within the tranny) itself.
Well, (for argument's sake) if there was an LSD unit in there...the LSD, since purely mechanical will interpret the transfer of torque from the ATTS as the left (inside) tyre spinning too fast. And doing it's job, the LSD will then send more power to the outside wheel. Basically monkey wrench-ing the whole calibration that has been computed by the ATTS unit.
In the end, those two things just simply do NOT work in unison.
Feel free to try though, i'm curious to read the write-up.
Yeah, sorry to tell you that your sources are either; A. unreliable, or B. dishonest, or C. just plain ignant (read. Ignorant).
In addition, can you direct me to a manufacturer that has an LSD application for the Type SH or Type S? Cusco, no. Kazz, no. Quaife, no.
ATTS and LSD work differently, I can't understand why can't you have both.
ATTS does exactly what an LSD would do. However, instead of it being purely mechanical (like the LSD) to determine the distribution and or amount of torque to be transferred to the outside wheel, ATTS uses an array of sensors (yaw rate, steering angle, it's own computer, blah, blah, etc.) to aid it's distribution. Basically, its a more sophisticated form of a limited slip differential.
So, if you wanted a functioning ATTS from a JDM Type S engine, you better make a trip to your honda dealer and buy everything else mentioned above.
Furthermore, since the ATTS unit is located between the differential and left halfshaft, a hard left hand turn would lead to the transfer of power to the right (outside) front tyre back through the actual differential (within the tranny) itself.
Well, (for argument's sake) if there was an LSD unit in there...the LSD, since purely mechanical will interpret the transfer of torque from the ATTS as the left (inside) tyre spinning too fast. And doing it's job, the LSD will then send more power to the outside wheel. Basically monkey wrench-ing the whole calibration that has been computed by the ATTS unit.
In the end, those two things just simply do NOT work in unison.
Feel free to try though, i'm curious to read the write-up.
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