Differance between a Front EK9 and EJ9 subframe


joe_thompson

joe_thompson

Engineering Tech
Joined
May 21, 2010
Messages
788
Is there any difference in the actual subframe? im aware that the ek9 steering rack is different but what about the subframe?

Had a bash at searching but carnt find a definite answer.


Thanks in advance:thanks:
 
apart from the steering rack and anti-roll bar stuff i'd imagine that the basic sub-frame would be the same.
 
Cheers guys, i would of thought they were the same myself but i read somewhere that the steering rack sits lower, effectively giving you different bump steer characteristics.
 
What about the rear engine mount? I know on ef's the b series subframe and d series subframe is slightly different.
 
would there be a benefit in replacing the steering rack with an ek9 rack when converting an ej9 or ek3?
 
The EK9 has less turns lock to lock so it sharpens up the steering:nice:

I was led to believe the EK9 subframes were a bit stronger/stiffer, not sure how much truth is in that though..
 
Are ek9 subframes not seem welded in places to make them a bit stiffer i tought?
 
the subframe is different!
The EK9 Subframe is 50200-S03-J01
The EJ9/EK4 Subframe is 50200-S04-020

Of course the engine mount is different from B- to D-Series Engines.
cheers
Oliver
 
Seam welded all the way around, I've got mine off ATM. The lower arms are seamed aswell.
 
I would really like to hear some people reviewing the rigidity among ek4 and ek9 to see how all these differences feel in the real world. Also any comparison among the ek4 steering and the ek9 one ?
 
Today I wanted to replace the upper front tower bar (the red one) on the EK9 because the paintwork faded a little bit. I removed the old one and put the new one in place. But the new one didn't fit correctly because the bolts were not aligning the holes of the bar.
I had the same problem with my EJ6 Coupe. I fitted the EK9 bar about 1 year ago. There I jacked up the car in front of the center lift point and the bar was slipping into the bolts.
I tried the same today but nothing changed. So I looked into the inner wheel arch:
qr2v.jpg

The bolts are welded together with this iron sheet. This prevents the body from bending.
I think this shows very well how much stiffer the EK9 chassis is. I will have to machine out the holes a little bit to solve the problem.
best regards
Oliver
 
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