Throttle Bodies
01-02-02, 02:39 PM
#1
Lexus Champion
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Throttle Bodies
taking an idea from the domestic side, does anyone make larger throttle bodies for the SC 400?
I've seen BBK 75 and 80 MM throttle bodies for $219. They are supposed to give another 12-15 HP on their own on a mustang.
So, any one know where we could find a contact that makes them to fit an SC 400?
I've seen BBK 75 and 80 MM throttle bodies for $219. They are supposed to give another 12-15 HP on their own on a mustang.
So, any one know where we could find a contact that makes them to fit an SC 400?
01-02-02, 03:58 PM
#4
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BE CAREFULL with the larger Throttle bodies!!! I have an RC engineering professionaly ported TB for my 400, and I had to remove it. Why? Because after I replaced this along with my purple dragon TC, the car would hunt for the correct transmission gear when not under load at speeds from 35-45 mph. Sure it would find the right gear when I tapped tha gas a little more, but it was driving me nuts. I thought it may have been a TV cable adjustment, or TPS adjustement, but it was not the case, as I tried 3 TPS controls, and adjusted the living ****** out of the TV cable without help.
RC would not even respond to my inqury ( I would NOT recommend this outfit, as they seem to be very non-responsive unless $$ is comming their way), other people I spoke to gave me some hints, but all help was not panning out, so I was on my own to fihgure it out, which I believe I did.
When I put the non-ported TB back on, all worked well with my shift points (no hunting), and since I R&Rd it twice, it was not an improper job. What I deduced is that the Mass Air Flow sensor was inputting information that the throttle position sensor (TPS) was not anticipating, so the computer did not know the correct shift point, hense, hunted. This is my experience with "big "throttle bodies, and no, there was not a noticible increase in power.
RC would not even respond to my inqury ( I would NOT recommend this outfit, as they seem to be very non-responsive unless $$ is comming their way), other people I spoke to gave me some hints, but all help was not panning out, so I was on my own to fihgure it out, which I believe I did.
When I put the non-ported TB back on, all worked well with my shift points (no hunting), and since I R&Rd it twice, it was not an improper job. What I deduced is that the Mass Air Flow sensor was inputting information that the throttle position sensor (TPS) was not anticipating, so the computer did not know the correct shift point, hense, hunted. This is my experience with "big "throttle bodies, and no, there was not a noticible increase in power.
01-02-02, 06:09 PM
#5
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928-
good to find out that you solved your hunting problem...
maybe a modified wr ecu would solve the problem with the larger throttle body and torque converter?
i would also postulate, extude honing the intake manifold would also have the same effects with a torque converter....just a thought.
good to find out that you solved your hunting problem...
maybe a modified wr ecu would solve the problem with the larger throttle body and torque converter?i would also postulate, extude honing the intake manifold would also have the same effects with a torque converter....just a thought.
01-03-02, 10:03 AM
#6
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808,
Your theory has merit, and should be a logical presumption. I have asked one of the major suppliers (well known through this forum) of modified ECU's for the 400 if there was such a modification, and the answer was no.
If I had a better understanding of the (ECU) hardware platform, including the I/O buss structure, and code I would endeavor modifying the thing myself. It is unfortunate that there is not the same type of competition in the aftermarket ECU programming as there is in the big three. If the hardware includes flash memory, it is possible to alter the codes "on-board". If a ROM is used, then that IC (or IC's) would require replacement with pre-programmed ones with the proper "tweaks" included.
Thanks for the comment.
Your theory has merit, and should be a logical presumption. I have asked one of the major suppliers (well known through this forum) of modified ECU's for the 400 if there was such a modification, and the answer was no.
If I had a better understanding of the (ECU) hardware platform, including the I/O buss structure, and code I would endeavor modifying the thing myself. It is unfortunate that there is not the same type of competition in the aftermarket ECU programming as there is in the big three. If the hardware includes flash memory, it is possible to alter the codes "on-board". If a ROM is used, then that IC (or IC's) would require replacement with pre-programmed ones with the proper "tweaks" included.
Thanks for the comment.
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