View Poll Results: Better motor to use S4 or S5?
S4
3
37.50%
S5
4
50.00%
either one
1
12.50%
Voters: 8. You may not vote on this poll
S4 vs. S5 13bt
06-27-02, 11:20 PM
#1
Full Member
Thread Starter
Join Date: Feb 2002
Location: San Luis Obisbo, California
Posts: 143
Likes: 0
Received 0 Likes
on
0 Posts
S4 vs. S5 13bt
The S5 has more power (200) and a compression ratio of 9:1. The S4 has about 18 less hp but a lower compression ratio of 8.5:1. Which motor would be better to modify? Can the S4 hold more boost because of the lower compression?
06-28-02, 01:01 AM
#3
Glock Lover
Join Date: Mar 2001
Location: Currently residing in St Charles, MO
Posts: 2,223
Likes: 0
Received 0 Likes
on
0 Posts
The S4 will hold more boost, and will take a nice hit to the rotor face, and will suffer less in the case of an apex seal breaking. The S5 face will sometimes be dented if confronted with detonation.
06-28-02, 01:31 AM
#4
Senior Member
Join Date: Mar 2002
Location: Jersey Shore
Posts: 255
Likes: 0
Received 0 Likes
on
0 Posts
the s4 holds more boost but i have an s4 and an s5...s5 being the parts car, i swapped everything except the motor from the 90 to my 87...due to a blown seal and seized turbo on the 90...had a bad oil problem at 85k miles and turbo filled with oil and seized somehow...
Thread
Thread Starter
Forum
Replies
Last Post
rgordon1979
3rd Generation Specific (1993-2002)
40
03-15-22 12:04 PM
BLUE TII
Single Turbo RX-7's
10
09-26-15 10:12 PM
