Guest Pammibaby Posted January 4, 2006 Report Share Posted January 4, 2006 Hi, could anyone please help me out as I cannot find information I require on throttle bodies. I have bought a 2.8 throttle body for a K reg Golf VR6 for my partner, he seems to think that the throttle body he wanted was a 2.9 one, even though his car has a 2.8 litre engine. Can anyone tell me what the difference is between the 2.8 one and the 2.9 one, and why my partner would want the 2.9 one for his 2.8 engine?Please help me out.Thanks Link to post Share on other sites
mk3anni 0 Posted January 4, 2006 Report Share Posted January 4, 2006 An early 2.8 will gain a small performace increase from a 2.9 TB as it flows more air. Link to post Share on other sites
Guest Pammibaby Posted January 4, 2006 Report Share Posted January 4, 2006 Thank you for such a quick reply!The throttle body I bought said it was 'ported', what does this mean and what does it do for the throttle body? Link to post Share on other sites
mk3anni 0 Posted January 4, 2006 Report Share Posted January 4, 2006 Means its been machined to improve airflow. I guees it depends how much it has been ported by, it may well be better than a stock 2.9 TB. Link to post Share on other sites
mightyvr6 0 Posted January 4, 2006 Report Share Posted January 4, 2006 The 2.8 TB has a lip or ramp on one side to make the throttle response more progressive. The 2.9 TB doesn't have this ramp so is said to be less restrictive. Link to post Share on other sites
Guest Pammibaby Posted January 4, 2006 Report Share Posted January 4, 2006 Here is some wording from the advert which was the throttle body I bought, could you please have a wee read and let me know if you think the 2.9 throttle body would be better than this one:XXL Throttle Body VR6--- polished show & shine version ---The BEST way to get more POWER and SHOW&SHINE to your VR6!!!In this auction you have the possibility to bid on a special modified XXL 2.8l VR6 Throttle Body. This special-part got mirror-glaze polished also outside for max show.Maximum air intake is garanteed with this special worked and ported Throttle Body. It has been maximum modified to breath better so flows much more and improves your BHP and LBFT. Your Motor gets more power for acceleration, other tuning parts will work much better with this Throttle Body.Here is a better discription of the special work at the throttle body:The throttle body inside is not just polished, there is a lot of work in it. In the 2.8l throttle body there are partial load-edges, which makes the motor much softer for all the people. The interior cross section of the XXL throttle body was increased by maximum lowering and/or removing of the tapering (partial load edges) in the inlet and in the discharge opening by a maximum! Inlet and discharge opening were completely worked on, not only the large partial load edge within the lower inlet range. The inlet edge at the housing was additionally worked on and flattened razor-sharp. Thus it is now still aerodynamically cleaner and air in the inlet is braked still less and/or swirled. The passage became subsequently, highly polished, in order to reduce friction resistance and turbulences to an absolute minimum. As a result of this treatment of the XXL throttle body is a substantially more direct responsing mode of the engine arises. With an original throttle body the responsing mode of the engine is rather co-ordinated with comfort by the assigned partial load edges. After assembly of the XXL butterfly valve the VR6 engine unfolds sportyness, passage ` from lower rpm` is now noticeably more present. This XXL throttle body got also polished outside for a nice show&shine. Nearly nobody has such a shiny TB at his engine, so get this nice part !!!(I know my english isn Link to post Share on other sites
mk3anni 0 Posted January 4, 2006 Report Share Posted January 4, 2006 If its ported as he says then I don't see there'd be any reason to swap it for a 2.9 one, anyone else have a view?? Link to post Share on other sites
fritzenberg 3 Posted January 4, 2006 Report Share Posted January 4, 2006 take the old one out and look at them both side by side to check that the new one`s definately bigger,should be though.by the way don`t expect to notice an improvement straight away as it takes the ecu a while to adjust to the extra air-flow. Link to post Share on other sites
Guest Pammibaby Posted January 4, 2006 Report Share Posted January 4, 2006 I think it is definately bigger but what I do not know, is if the 2.9 throttle body would be better than the ported 2.8 one???? Will the ported 2.8 one make the same increase in BHP as the 2.9 one would? Link to post Share on other sites
mk3anni 0 Posted January 4, 2006 Report Share Posted January 4, 2006 I think it is definately bigger but what I do not know' date=' is if the 2.9 throttle body would be better than the ported 2.8 one???? Will the ported 2.8 one make the same increase in BHP as the 2.9 one would?[/quote']WOuld have thought the TB you have would be the better of the 2. Link to post Share on other sites
TVR6 0 Posted January 4, 2006 Report Share Posted January 4, 2006 Hi Pammy, as Mk3Anni said, yours sounds like it has had more 'work' done on it, wereas the standard 2.9 TB although larger than a standard 2.8 TB is just that, 'standard'. It's difficult to say which would be better, the only way to tell is to fit it and see. Too late to get your money back but you can always sell it on if it's unsuitable. Not very helpfull I know. The blurb from the seller although excessive is mostly factual. Link to post Share on other sites
Snedboy 0 Posted January 5, 2006 Report Share Posted January 5, 2006 Ive seen this throttle body that ure talkin about and it looks very good.The flow is at optimum levels because of the amount of machining the company done to the throttle body therefore in my opinion would definitely work much better than a standard 2.9. Link to post Share on other sites
Guest Pammibaby Posted January 5, 2006 Report Share Posted January 5, 2006 Just wanted to thank all of you who responded to my thread. I am amazed at how quickly I got your responses and am really grateful for all the info I now have. I've certainly learned a lot about throttle bodies in 1 day.Thanks again!Pamela Link to post Share on other sites
TVR6 0 Posted January 5, 2006 Report Share Posted January 5, 2006 LOL it might have allot to do with your gender Link to post Share on other sites
Guest Pammibaby Posted January 5, 2006 Report Share Posted January 5, 2006 Ha Ha! Take it there aren't many girls on here then.A bit of an update about the throttle body, we have decided to keep the 2.8 ported & polished one but I found a guy on the internet last night who can take it and enlarge the butterfly from 64mm to 66.5mm, I'm not sure how I found this guy, all I remember is that it was on a Corrado forum, he is alpina@aol or something, has anyone heard of him as he does all the work on his own, he works for himself. Link to post Share on other sites
mightyvr6 0 Posted January 5, 2006 Report Share Posted January 5, 2006 Alpina527 enlarged my 2.9 TB used a larger~68mm butterfly. Excellent workmanship. Link to post Share on other sites
Guest Pammibaby Posted January 5, 2006 Report Share Posted January 5, 2006 How did you find out about him? Link to post Share on other sites
fritzenberg 3 Posted January 5, 2006 Report Share Posted January 5, 2006 i also got my t.b from mr alpina and i`ll second what mightyvr6 said! Link to post Share on other sites
mightyvr6 0 Posted January 5, 2006 Report Share Posted January 5, 2006 I think I first saw him advertising on ebay, then his details were posted on the corrado forum. Link to post Share on other sites
Guest Pammibaby Posted January 5, 2006 Report Share Posted January 5, 2006 Did you notice any increase in power from what was done to your throttle body? Link to post Share on other sites
andy 0 Posted January 5, 2006 Report Share Posted January 5, 2006 I've got an alpina one on my Rado, top work. I used to have intermittent stalling problems, these have completely vanished since fitting the new t.b. The t.b in conjuction with my BMC CDA is a noticeable improvement over stock. Link to post Share on other sites
TVR6 0 Posted January 5, 2006 Report Share Posted January 5, 2006 The intermittent stalling was probbaly due to a dirty tb and/or sticky butterfly Link to post Share on other sites
matth76 1 Posted January 6, 2006 Report Share Posted January 6, 2006 How much does a ported throttle body (for an ODB2 2.8) cost from Mr Alpina? Sounds like something I'd also be interested in Is there a certain limit in butterfly size you can have for an ODB2 2.8 Golf? Is 68mm the optimum? Link to post Share on other sites
fritzenberg 3 Posted January 6, 2006 Report Share Posted January 6, 2006 matt76it`s only for obd1 cars as the obd2s have bigger t.b`s and better ecu`s as standard which is probs why u got 195bhp with just a zorst and high flow cat Link to post Share on other sites
Snedboy 0 Posted January 6, 2006 Report Share Posted January 6, 2006 Pammibaby just noticed ure avatar picture and realised ure car or b/f car looks very similar to one that runs bout my area.You dont happen to live in Ayrshire do u????If you do then your boyfriend will recognise my car and we spoke down at Eglinton car show a few months back there. Link to post Share on other sites
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