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Corsa Sport » Message Board » General Chat » Throttle Body Porting... » Post Reply
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chris_uk |
posted on 5th Apr 08 at 13:43 |
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chris_uk |
posted on 5th Apr 08 at 13:42 |
i just used a dremel.. with a polishing bit.. but i used the sanding wheel to take off the metal then i used 800grit W&D to make it smooth | |
fazza |
posted on 5th Apr 08 at 12:50 |
what are you guys using to polish these? | |
chris_uk |
posted on 5th Apr 08 at 12:39 |
well... its done.. i jsut need to get some countersunk screws to make the most of the porting but its done, and the throttle responce is better i would say.. | |
chris_uk |
posted on 3rd Apr 08 at 08:52 |
i dont know what your cars are like to mine but too much air can cause problems.. | |
Stu_22 |
posted on 3rd Apr 08 at 08:44 |
Ive just done a bit of work on my corsa throttle body | |
Superlite Ltd. |
posted on 3rd Apr 08 at 08:16 |
Thats very shiney Ryk :D | |
chris_uk |
posted on 3rd Apr 08 at 08:13 |
please bear in mind these graphs were not done with a remap.. | |
chris_uk |
posted on 3rd Apr 08 at 08:09 |
thats a 20hp peak gain from the changing inlet alone :groupjump:, the dyno tech mentioned right away that the car was pulling straight to the limiter and that the fueling was perfect thumbsup The graph also shows nice smooth lines all the way though the rev range | |
chris_uk |
posted on 3rd Apr 08 at 08:08 |
dave, i have heard that you loose some torque and gain BHP.. but on the whole a worthy mod. | |
Ryk |
posted on 2nd Apr 08 at 09:29 |
How's mine look?? :D :P | |
Dave A |
posted on 2nd Apr 08 at 09:11 |
I have done the inlet manifold swap on a customers car, gave decent gains higher up the revs but lost more than he had gained lower down. | |
chris_uk |
posted on 1st Apr 08 at 22:12 |
of cause robin i agree.. but you can have a certain size hole with shite in the way (ie throttle body standard) and then clean all the shit away (ported throttle body) then the airflow is more direct.. | |
Robin |
posted on 1st Apr 08 at 22:03 |
Yeah, but unless you increase the size of the throttle butterfly, the restriction is still there. It'll only be as good as the smallest part, making the path through smoother will help slightly, but it's always going to bottleneck. | |
chris_uk |
posted on 1st Apr 08 at 21:58 |
you dont realise until you feel it just how much alu there is stopping air blockage.. | |
Superlite Ltd. |
posted on 1st Apr 08 at 21:19 |
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Paul_J |
posted on 1st Apr 08 at 20:44 |
quote: Cleaning it is a good idea tho, but i agree with robin. not worth the effort. | |
Robin |
posted on 1st Apr 08 at 20:37 |
I'd be amazed if you see any gains, or feel any difference Chris. | |
EarlofBarnet |
posted on 1st Apr 08 at 20:34 |
I'd just be extremerly careful when 'porting' around the butterfly. If you take off even a tiny bit too much then air will pass the TB even when it is closed (ie. when you're off the throttle/idle etc). This might confuse the ECU as more air will be coming in to the inlet manifold than it thinks should be. | |
chris_uk |
posted on 1st Apr 08 at 19:06 |
a coupe of the lads on z22se.co.uk have used a dril bit and i suspect that it should work ok, aslong as i take my time.. | |
EarlofBarnet |
posted on 1st Apr 08 at 18:54 |
Don't think you'd get a decent circular profile using a dremel. Would it not be better to get some kind of large abraisive circular drill bit to go right through the TB to get a consistant size right through? Then get a larger butterfly to suit the enlarged size? | |
chris_uk |
posted on 1st Apr 08 at 17:47 |
thought i would give it a go |