Engine modding -Throttle body
Discussion
Looking at the prices of ported TB's I thought I'd give mine a go today. Pretty easy really with the right kit. There's a lot of metal in the way to be removed, so I started by marking the butterfly fully closed position so I did not mess with that. My kit included rasp files, die grinder with flapwheels, blending wheel and polishing mop.
Took about 2 hours taking my time and re checking. Have a look at the result:
Took about 2 hours taking my time and re checking. Have a look at the result:
Edited by MyM8V8 on Friday 2nd April 18:56
SimonV8ster said:
What diameter was it and what diameter is it now ?
Simon. Its the same diameter at the butterfly, just nicely blended and opened up. There's quite a bit of material to come out.I suppose I could look at making a larger butterfly plate?
[quote]the_ferret82
896 posts
16 months
[report] [news] 19:08
looking good. where did the get the kit from and how much?? [quote]
I just bought a fibre wheel, the mop and the polish. I dunno about 12-15 quid?
Edited by MyM8V8 on Friday 2nd April 19:38
There is a big chunk of "sheite" in front of the blade, probably to reduce throttle tip in response and make it more progressive or something. Anyway, that can come out. I did mine, but a bit more roughly 
You can also change the blade from square edge to a rounded edge keeping the actual external dimeter the same. (ie) dont touch the centre edge of the blade.
I used a permanent felt to mark the closed position and hacked away up to that level. Like Gareth says, there is loads to take out. The idea is to make it a linear taper from the outside edge in to the blade. Stock there is chunks of mess and blobs in the way.
Bound to be at least 1000bhp mod.
You can also change the blade from square edge to a rounded edge keeping the actual external dimeter the same. (ie) dont touch the centre edge of the blade.
I used a permanent felt to mark the closed position and hacked away up to that level. Like Gareth says, there is loads to take out. The idea is to make it a linear taper from the outside edge in to the blade. Stock there is chunks of mess and blobs in the way.
Bound to be at least 1000bhp mod.
How much power Paul? Dunno, probably not measurable one day to the next, but judging by the difference it already made to my idle (which was crap) I'm very happy. A couple would be great, for nothing.
I also had an alignment problem in the airflow path when I fitted the Dus OTR to the FAST intake. The porting and blending improved this no end.
Sorry about no before and after, another Senior moment, but as Ringram said, there a s
t load of material to come out of the way.
One thing to be careful of (As per Ringrams post) and that is maintaining the sealing of the butterfly at the closed position and if the edge of the blade is flowed. I used a metal scribe to mark it and worked the porting carefully up to it.
TB is off the LS2 UTE BTW, GTS is next.
I also had an alignment problem in the airflow path when I fitted the Dus OTR to the FAST intake. The porting and blending improved this no end.
Sorry about no before and after, another Senior moment, but as Ringram said, there a s
t load of material to come out of the way.One thing to be careful of (As per Ringrams post) and that is maintaining the sealing of the butterfly at the closed position and if the edge of the blade is flowed. I used a metal scribe to mark it and worked the porting carefully up to it.
TB is off the LS2 UTE BTW, GTS is next.
Edited by MyM8V8 on Saturday 3rd April 14:22
MyM8V8 said:
gsd2000 said:
Even if you dont gain any power, at least it looks good
Br great if it gave me another mile an hour?have you found that the throttle response has improved?
gsd2000 said:
MyM8V8 said:
gsd2000 said:
Even if you dont gain any power, at least it looks good
Br great if it gave me another mile an hour?have you found that the throttle response has improved?
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