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Message: <blockquote data-quote="shiroitenshi" data-source="post: 1063330367" data-attributes="member: 27518">no, not really.. depend on the ITB setup. got long runner and short runner. Long runner, you are right on that point, that low end suffers. but with tuning, not so much. Air flow suffers in the low end, just have to decrease fuel on the fuelling maps, The ITB i did was short runner setup. and what i mean by it helps low end is that it's not actually increase power, but more like it makes it seem that way.. because if you press only 10%, the total surface area of the ITB throttle ports makes it seem like you opened the throttle area more than 10% (more throttle = faster la)The low throttle/high load fuelling also quite a bit more than single throttle setup, which is sort of proof how the ITB allows more air in at low throttle openings.I think one thing why ITB is not so popular because it's difficult to tune.. each time want to set idle speed, not one screw on TB, but 4! and have to balance it properly too. Loose linkage, idle speed sure kacau, and have to rebalance all the four ports. Lol. that's why you don't usually see an ITB on honda idling like Toyota AE engines (but it is doable, since I did achieve that kind of idling) The key is just adjusting the idle screw and balancing the ports.With 68+mm TB available now and huge plenums, not much point putting in ITBs.ITBs also more likely to ingest sand and dust into engine.---------- Post added at 01:50 PM ---------- 6 hour anti-bump limit - Previous post was at 01:44 PM ----------if iron liners, can even put in 85mm (cough ERL does it cough)If you press in liners, there is a risk of block cracking, so it's better to buy already prepped ones. I think Golden Eagle cheaper now thanks to the 3.1USD to RM1 exchange.but these are not for daily drivers, this is more close towards competition setup already.Personally, I don't think sleeving is necessary unless you want to go extreme bore or turbo, but that's just my opinion. Never had issues with 85-86mm bore on B20 and 82mm on B18c. THe 82mm B18c still running after 3 years lol.</blockquote>

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