Hey guys....
I will be doing JDM ITR motor swap pretty soon and have few questions.
What is the diffrence between pre 98 and 98+ JDM ITR motor??
The motor will be going into a EG chassis so what year of the motor is better??
and last question, is it worth spending $400-500 more for the 98+ swap??


btw I have found some good infos on the search archives but I need more anweres to confirm this post. Thanks

 

i have a jdm 98 spec type r in my gsr and i love it i dynoed @ 186whp wih dc 4-1 header, AEM CAI, and invidia exhausr....its nice motor

 

The difference mostly comes down to the type of header, the later one (98+) has a relatively nice stainless 4-1 with heat shields.

Is it worth it? Why not. The 98+ might have fewer miles on them.

 

The 98+ also comes with the 4.785 final drive tranny, while the 97 and under come with the 4.4 final drive

 

Final drive ... good point, thought I forgot something!

 

i believe the cams are more agressive? correct me if im wrong

 

Cams should be the same. Another difference between 96-spec and 98 spec motors is that the intake ports are buffed/polished by a precise machine instead of by hand.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RisforTypeR &raquo;</TD></TR><TR><TD CLASS="quote">Cams should be the same. Another difference between 96-spec and 98 spec motors is that the intake ports are buffed/polished by a precise machine instead of by hand.</TD></TR></TABLE>


Actually the intake cam I believe has 3 degrees more duration than the 96-spec...

 

Shell out the extra money for the 98 spec. It's a newer engine for 1, cams are better, header is better, and you get the badasss 4.7

 

i forgot i read this somwhere what was the benefit from the higher final drive? i remember somthing about one of them could have a better exit speed out of a corner... sorta foggy tho

 

i have had both engines

An the 98 spec wasnt faster than my 96 spec at all, and best motoring also noted the same thing. the 4.785 final drive is okay its good first throught third but has a gsr 4th and fifth gear.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chubzilla &raquo;</TD></TR><TR><TD CLASS="quote">i have had both engines

An the 98 spec wasnt faster than my 96 spec at all, and best motoring also noted the same thing. the 4.785 final drive is okay its good first throught third but has a gsr 4th and fifth gear. </TD></TR></TABLE>
perfect for freeway cruising, who needs an annoying short *** 5th sanyways IMO

 

so 4.7 is better than 4.4??

 

Difference between the gear ratios are this :

96 spec :
1st: 3.230
2nd: 2.105
3rd: 1.458
4th: 1.107
5th: 0.848
Reverse: 3.000
Final Drive: 4.400

98 spec :
1st: 3.230
2nd: 2.105
3rd: 1.458
4th: 1.034
5th: 0.787
Reverse: 3.000
Final Drive: 4.785

other differences were as the guys said . intake cam on the later cars were the same as the CTR and the 98+ cars were equiped with stainless 4-1 header instead of the cast iron manifold. Also don`t forget the carbon fiber look on the spark plug wires cover

 

what year of the motor would be easier to swap into a EG chassis??
by easy, I mean less work.

 

Some of you people don't know the effects of shorter and longer gearing. Please refrain from commenting and guessing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HATCHingMN &raquo;</TD></TR><TR><TD CLASS="quote">what year of the motor would be easier to swap into a EG chassis??
by easy, I mean less work.</TD></TR></TABLE>

They are the same motor so they envolve the same work .

 

i believe the compression is slightly higher in the 98spec.

98spec - 11.1:1
96spec - 10.6:1

kepani-who wonders...are our itr "technically" 96spec? :shrugs:

 

and in the 98+, you get a different spark plug cover

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kepani &raquo;</TD></TR><TR><TD CLASS="quote">i believe the compression is slightly higher in the 98spec.

98spec - 11.1:1
96spec - 10.6:1

kepani-who wonders...are our itr "technically" 96spec? :shrugs:</TD></TR></TABLE>

You're confusing USDM with JDM spec.

JDM = 11:1
USDM = 10.6:1

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by black cx &raquo;</TD></TR><TR><TD CLASS="quote">and in the 98+, you get a different spark plug cover </TD></TR></TABLE>

Are you sure? That sounds wrong to me.

 

the fake carbon plug cover was optional

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Takumi Fujiwara &raquo;</TD></TR><TR><TD CLASS="quote">

You're confusing USDM with JDM spec.

JDM = 11:1
USDM = 10.6:1</TD></TR></TABLE>

All JDM ITRs and UK/Euro ITRs had 11:1 C/R

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmspoonitr &raquo;</TD></TR><TR><TD CLASS="quote">the fake carbon plug cover was optional</TD></TR></TABLE>

yup, its printed cf

 

In the best motoring video, the also note the 16" wheels and larger brakes caused the 98 spec to be a bit slower which is why they added the shorter FD. The shorter FD in a light car like an EG will haul a$$ like no tomorrow and keeps you in higher RPM on the highway.