I had a talk to my mech today about the intake manifold/plenum and throttle body inlet.

I am now considering getting this (as suggested by w0n):
http://www.atsracing.com/Parts.mvc/Details/E-ATS-TBI-P

And this:
http://www.atsracing.com/Parts.mvc/Index/ATSMANIFOLD

I've emailed ATS with some questions, but perhaps there will be some people on here who can answer them for me. Remember that my engine is a 1990 Gen 2 3SGTE.

Firstly, does anyone know how the ATS replacement throttle body inlet (the first link above) achieves a higher diameter? Is it simply because it doesn't have the locating 'lip' like the stock one does?

Secondly, when using the ATS throttle body inlet, possibly in combination with their modified intake manifold/plenum (the second link above), can my stock 1990 Gen 2 throttle body be retained, or would I need a new one with a larger diameter? Just to confirm, my stock TB appears to have a 55mm butterfly or maybe a bit smaller, and 56-57mm diameter at each face of the TB.

If no one has any definite answers on here that's OK, hopefully I'll hear back from ATS tomorrow anyway.

In unrelated news, I'm expecting the correct Full Race exhaust manifold to arrive later this week, so my mech will be able to continue working on my car again!

why not email ats with these questions

The ATS inlet fits on the 90 3sgte TB. I had one many moons ago.
Get em to send a new TB gasket with it for good measure.

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Originally posted by robk

quote:

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Originally posted by w0n

why not email ats with these questions

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I already did (as I mentioned above), but I thought there might be people on here who have already been through this and would therefore know the answers.

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Originally posted by kameleon

bolt on the 92 model throttle and inlet combo then you get a standard looking/cheaper alternative that fixes your issue.

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Thanks for that.

I just deleted a few of my last posts, because I just realised that the ATS TB inlet is for 91-92 (and 1990 aswell), but not 91-95 (I was confusing myself with the 91-95 compatibility of the ATS intake manifold).

So in short, a 92+ TB with an ATS OR 1992 TB inlet would be optimal, right?
And just to clarify, if I put an ATS TB inlet on a pre 1992 TB, I will still have a restriction from the TB itself right, unlike the 92+ TB?

If the answer to both of those is yes, then I guess that's all I need to know, but let me know if I still have the wrong idea lol.

The early gen2's had a wierd restrictive trumpet thing.
The late gen2's did not.

The throttle bodies are the same size for all GEN2's though.

So basically you are after a late gen2 throttle body setup OR an early one with the ATS mod thing.

quote:

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Originally posted by Bionikal

The early gen2's had a wierd restrictive trumpet thing.
The late gen2's did not.

The throttle bodies are the same size for all GEN2's though.

So basically you are after a late gen2 throttle body setup OR an early one with the ATS mod thing.

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OK now I'm confused again lol.
It's not that your explanation is confusing, but because I'm getting slightly conflicting and/or ambiguous info from different sources.

There are two items to consider here:
1) Throttle Body
2) Throttle Body INLET (the thing that is trumpet shaped on my engine)

If I understand correctly, the Throttle Body is the same on all Gen 2 engines, but the Throttle Body INLET is different on early Gen 2 engines (such as mine?). Am I right so far?

Secondly, the Gen 3 engines have a larger throttle body than all Gen 2 engines right? In what year was the Gen 3 engine introduced? 1992, or later?

Another separate question, can anyone clarify if the bolt spacing on the intake manifold side of the throttle body is the same on all stock throttle bodies and plenums?

Thanks Mark!

Kameleon said I should get a 1992 throttle body and throttle body inlet...is 1992 gen 3 or gen 2? I'm not good with gen 3 details as I have a gen 2. With gen 3 engines, are the throttle body and throttle body inlet both larger than all gen 2s, including late gen 2s?

Gen 3's were introduced in October 93, i have a 90 Gen 2 Like yours and it tapers

TECHNICALLY we have Generation 1 MR2's (don't confuse this with a Gen 2 3S-GTE)

as far as i've seen, all the gen2's i've come across have had this tapered inlet funnel, but then again i'm not as well versed as kameleon, maybe he means bolt on a gen 3 tb + inlet?

anyway, sumantics, i was thinking of getting one of these inlet funnels aswell so maybe i should just put an order in for julian and i, let me know if you want me to get you one too...