w0n
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RE: robk's MR2 Turbo
2010/07/28 19:33:35
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 stolen from bio's thread
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artymr2
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RE: robk's MR2 Turbo
2010/07/28 20:07:44
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excuse my ignorance, but if the the gen2 thottle bodies are the same size, and the only difference is the early turmpet flaring out (ie starting bigger) and the later being non flared (ie staying the smaller constant size), then how does going from the flared to non flared actually change the throttle bodies performance?
Or am I missing something here?
Cheers
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w0n
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RE: robk's MR2 Turbo
2010/07/28 21:13:15
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i think what the difference is (don't quote me on this) is that the gen 2 'funnel' extends past the flange for the throttle-body and has a small diameter ring that locates the 'funnel' within the throttle-body, the ATS one (or for that matter the one that bio has) does not have this and is larger in diameter than the 'funnel'. 
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Bionikal
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RE: robk's MR2 Turbo
2010/07/28 21:23:40
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w0n ive got a gen2 and its definately not tapered/funneled. the late model gen2's did not have this taper.
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2hardtop
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RE: robk's MR2 Turbo
2010/07/28 21:29:25
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thats what he said, Bifocal
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Bionikal
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RE: robk's MR2 Turbo
2010/07/28 21:35:11
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quote:
Originally posted by 2hardtop
thats what he said, Bifocal
I beg and differ! quote:
as far as i've seen, all the gen2's i've come across have had this tapered inlet funnel
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2hardtop
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RE: robk's MR2 Turbo
2010/07/28 22:08:55
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I have the 2nd gen2 inlet on mine too.
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w0n
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RE: robk's MR2 Turbo
2010/07/28 22:28:51
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i didn't say you didn't have one, i just said i've never seen one
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2hardtop
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RE: robk's MR2 Turbo
2010/07/28 22:42:57
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artymr2
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RE: robk's MR2 Turbo
2010/07/28 22:43:03
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If the issue is this lip that extends inside the throttle body (which can be confirmed by sticking your fingers down the mounted trumpet), then why cant you just file/grind/sand this protrusion off?
Cheers
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nuk1ear
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RE: robk's MR2 Turbo
2010/07/28 22:48:45
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i think it could be a sleeving inside the tube, so it would need to be bored out properly possibly?
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w0n
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RE: robk's MR2 Turbo
2010/07/28 23:01:44
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i think it is the fact that it not only that it extends within the throttle body, but it also being a smaller diameter, i don't think its a sleeve, the whole funnel is a single piece, and file/grinding/sanding would work but it would be alot of work unless you have the proper tools
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robk
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RE: robk's MR2 Turbo
2010/07/28 23:31:47
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OK cool it's making more sense now, and I came to the same conclusion as you w0n.
What I really want to clarify now is whether Kameleon was suggesting for me to get a Gen 3 throttle body and inlet, or a late Gen 2 throttle body and inlet (as opposed to my early Gen 2 parts). He said 1992, so I guess he means late Gen 2?
I've mostly ignored the ATS intake manifold/plenum in all this too, as it is a separate issue altogether. I know that nearly all high power 3SGTEs have the ATS intake manifold or something similar, but I'm wondering if I really need it. Hmmm.
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artymr2
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RE: robk's MR2 Turbo
2010/07/28 23:34:41
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I think if you cut off the protrusion close the the mounting face then used a half round file to file away the inside of the funnel, it wouldn't be too hard. Aluminium files and sands pretty easily. Although it would be tricky to get it perfectly round, but I think you could get pretty close. Could also use a stone in a die grinder or drill.
You would also need to check how much material will be left just upstream of the flange, dont want to leave it too thin.
Cheers
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robk
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RE: robk's MR2 Turbo
2010/07/28 23:41:08
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quote:
Originally posted by artymr2
I think if you cut off the protrusion close the the mounting face then used a half round file to file away the inside of the funnel, it wouldn't be too hard. Aluminium files and sands pretty easily. Although it would be tricky to get it perfectly round, but I think you could get pretty close. Could also use a stone in a die grinder or drill.
You would also need to check how much material will be left just upstream of the flange, dont want to leave it too thin.
Cheers
It could be done, but I'd rather replace it because I think the funnel shape looks weird anyway.
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