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Independent throttle bodies v standard intake 964

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4 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
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YOUR RESEARCHIndependent throttle bodies v standard intake 964

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Use itbs

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When I first built a 3.0 motor totally stock (cams, 8.5:1 pistons and stock heat exchangers and muffler) but used itbs, it produced 194.6 rear wheel hp...

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Independent throttle bodies v standard intake 964
Frequently discussed work

Run more cam

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Suggestion

My limited understanding and experience, is that ITB's allow you to run more cam..

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Independent throttle bodies v standard intake 964
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Leading evidence: 'Use itbs' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run more cam' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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Run more cam

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Suggestion

My limited understanding and experience, is that ITB's allow you to run more cam..

Original post Read captured discussion
Independent throttle bodies v standard intake 964
Frequently discussed actions (2)

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Run more cam

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Suggestion

My limited understanding and experience, is that ITB's allow you to run more cam..

Original post Read captured discussion
Independent throttle bodies v standard intake 964

Use itbs

No successful repair reported for this finding.

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Discussions that performed work without a confirmed outcome
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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed

When I first built a 3.0 motor totally stock (cams, 8.5:1 pistons and stock heat exchangers and muffler) but used itbs, it produced 194.6 rear wheel hp...

Original post Read captured discussion
Independent throttle bodies v standard intake 964
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4 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

  • Porsche Forum Australia: 1 discussions

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Generation: 20261026T083035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi Everyone, Im thinking of going the route of Itb’s on my 964. In particular the ones from race head engineering (RHD). Does anyone here have any experience with these itb’s and what are everyone’s thoughts on them or any other itb’s Compared to the standard intake? cheers

POST 2Original post

Apart from the glorious sound they make they can also be tuned to each cylinder more specifically. They are however more complex and fiddly to balance and tune.

POST 3Original post

Without the supporting mods they aren’t likely to make any more power, in fact you will likely lose midrange, but they will sound the bomb. I have had a 964 3.6 with both the standard intake and gone ITB’s. The itbs didn’t really come to life until I did a 3.8 build with a good set of cams, custom heads, stepped tube headers etc. essentially all the in and out pathways. To get the beat out do them you need an engine built to rev and flow.

POST 4Original post

Agree with the above. My limited understanding and experience, is that ITB's allow you to run more cam.. which of course you need pistons that allow for the extra lift and duration too.. (cutouts). When I first built a 3.0 motor totally stock (cams, 8.5:1 pistons and stock heat exchangers and muffler) but used itbs, it produced 194.6 rear wheel hp... that which to me suggests it was a tad stronger than a completely stock motor. However, of course, there are variances between dyno accuracy so perhaps it was just in my mind!

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