what make the 10 extra horses? - Honda Prelude Forum

Prelude3885 · 02-18-2002, 10:50 PM

I'm just curious as to what exactly makes those 10 extra horses in a JDM H22a? The only reason I ask is because I plan on replacing all the internals anyway (cams, pistons, etc...). So, anyway, if the extra power of the JDM comes from these parts, it wouldn't really be worth it to pay extra for a JDM would it? Basically where does the extra power come from?

Sorry for rambling.....
Thanks

red92s · 02-18-2002, 11:54 PM

the JDM engine has a higher compression ratio. I didnt think there was a huge difference in price (if any). The USDM engine would be an easier installation.

SLICK96 · 02-19-2002, 01:52 AM

Quote:

Originally posted by red92s
the JDM engine has a higher compression ratio. I didnt think there was a huge difference in price (if any). The USDM engine would be an easier installation.

... But that JDM would be .... NICE!

preludechic · 02-19-2002, 08:08 AM

Plus the Japanese engine will probably be more reliable, seeing as it has less miles. But, you never know how they run 'em over there!

brendon2k · 02-19-2002, 08:15 AM

Quote:

Originally posted by red92s
the JDM engine has a higher compression ratio. I didnt think there was a huge difference in price (if any). The USDM engine would be an easier installation.

Why would the JDM be a harder install??

preludechic · 02-19-2002, 08:29 AM

When I put my new engine in (the JDM one), it's not going to be any different than if I were dropping in another USDM H22, except for changing the wiring harness. So I don't know how it could be different, unless perhaps it was going into an H23 or F22, but even with the H23, there's isn't that big of a degree of difficulty with either engine. I'm not saying the actual swap is going to be easy- unless you know what your doing, it's going to be a biatch for you, but if you don't know what you're doing then you shouldn't be putting an engine in by yourself anyways.

red92s · 02-19-2002, 10:55 AM

The wiring harnesses are different since JDM cars are right hand drive. I think this requires that you lengthen some wires and switch the fuel rail around. If shes going to be comlpetley rebuilding the engine, milage shouldnt be THAT big of a concern (and I have heard JDM cars usually are driven harder than USDM ones anyway). If shes going to be using aftermarket pistons anyway, why should she bother getting the JDM (higher compression) engine anyway? They look identical. The only reason I would get a JDM one is they might just be easier to buy as a complete swap package.

JDM Lude · 02-19-2002, 11:03 AM

the JDM motor also requires you to switch over your distributor and coil

Prelude3885 · 02-19-2002, 03:15 PM

so basically if you put typeS or JE pistons in both the USDM and JDM engines they would run the same number of horses?
thats all i need to know...

U.K VTEC · 02-19-2002, 03:41 PM

Quote:

Originally posted by SLICK96

... But that JDM would be .... NICE!

It is, believe me!

SLICK96 · 02-19-2002, 04:50 PM

Quote:

Originally posted by U.K VTEC

It is, believe me!

Hahaha ... I BET!

You lucky chum, you....

U.K VTEC · 02-19-2002, 04:54 PM

I still find it strange that 18 months ago my car was being driven around Tokyo!

Probably a sushi delivery car

SLICK96 · 02-19-2002, 04:57 PM

It's funny to think that we here in the states think SO HIGHLY of Ludes ... especially J-spec Ludes. I bet the Japanese probably think of them like we think of Geo Prisms ... as basically nothing. I don't care what they think of it, b/c I LOVE mine.

U.K VTEC · 02-19-2002, 05:02 PM

True, the Prelude isn't a popular car for tuning in Japan. Simply because it has no turbo and it's front wheel drive.

Everywhere you look it's R33s, Mitsi Evos and Subarus.
Basically, turbos and 4WD.

SLICK96 · 02-19-2002, 05:06 PM

Quote:

Originally posted by U.K VTEC
True, the Prelude isn't a popular car for tuning in Japan. Simply because it has no turbo and it's front wheel drive.

Everywhere you look it's R33s, Mitsi Evos and Subarus.
Basically, turbos and 4WD.

Wow, life must be rough over there. I wish my dad was a corporate giant who spoiled me rotten while I got to drag race all day in an R34. Sheesh!

SiLudeH23A · 02-19-2002, 08:35 PM

preludes arent that popular to mod. here either you know. everyones either got a civic or a teg.
tyler

AccordSleeper · 02-21-2002, 11:08 AM

So that possibly means that these engines aren't as beaten on in Japan as they would be with similar mileage in the US.

The pistons in a JDM H22 are domed, that's where the 10:6:1 compression comes from which gives you more power.