So, you really have a choice of very good intake manifolds. Either one works well depending how you address your power curve needs. One key link to make the Edelbrock manifold work so effectively is to induce high velocity thru the air intake system which we learnt thru our drag development program.Įdelbrock has also available a dedicated D15B/D16Z6 Intake manifold under part # 4754( one is available with us) which is very similar in appearance & layout to # 4756 However the plenum &intake runner frequency dynamics are different from the part # 4756. It has a power band upto 8000rpm which means in race trim you shift at close to 9000rpm along with the correct high lift cam, & gear box/ final ratios & exhaust system. In spite of us having various ITB combinations to choose from, we still find this to be an excellent intake both for forced Induction & n/a applications. In our highly modified D15 Honda drag engines where we regularly do 12 seconds in the quarter mile & also in the super saloon Motor Rev Honda City which we were primarily responsible for putting together for 2011, the Edelbrock intake manifold part #4756 does work remarkably well along with the 65mm Edelbrock throttle body #4791. We recommend this to everyone who wants to do serious modifications to any petrol engine. One gauge which we have found to be an absolute asset is the wide band air/ fuel gauge thru which we monitor the entire ECU setup. This entire combination was very effective to compete against any of the other more modded Hondas that prowl the streets of Bangalore. With the bigger valves already in place we saw no real need to do any head work for street use as the normal OE head has ample flow for use up to 7500rpm. Added to this is the fact that the later Honda City engines after 2000 came with bigger valves (30mm intake & 26mm exhaust) while the earlier ones came with 29mm Intake & 25mm exhaust valves. The stock D16Y8 cam is a shade better cam than the one that comes as OE on the normal D15 VTEC. To further improve engine output the stock cam from the D16Y8 was employed which further helped the upper mid range power while still maintaining the stock ECU. For the money spent we still had a winner on the street. The only limiting factor was the engine rev limit remained unchanged as the ECU was standard. Further this concept actually we found to work well on both the VTEC & non VTEC 1.5 engines. Economics wise we had a simple effective setup.
We ran head to head with no virtual difference at all Cost wise we had no headwork, no ECU, no special intake manifold. However if one gets the D16Y8 manifold it would definitely the one to use as there is a noticeable difference over the others.Īn interesting combination of our special 4-2-1 exhaust system coupled to a very trick cold air intake system along with a 30mm spacer block placed below the OE throttle body on the OE intake manifold & changing the final drive TO 4.25from the 1.3 gearbox actually changed the complete feel of the engine, & a few run ups were done against other so called highly modded street Hondas which had the exhaust systems, the D 16 Intakes, head work & modified ECU. In fact it performs better than expected for street use with a little bit of intelligent engineering, which nullifies the need of changing to a Z6 manifold.
D16Y8 INTAKE MANIFOLD MODS
The manifold on the left is the D16Z6 manifold and the one on the right is from the D16Y8.įrom the economics perspective we did some interesting mods & found that the OE manifold is not as bad as we first thought it to be. to classify them is simply thus:- the OE manifold is good for mid-range, the Z6 for high mid-range power & the D16Y8 manifold for high mid/ top end power. Over the several years that we have been involved in tuning we have had the opportunity to carefully evaluate the benefits of each of them. Of the 3, the best performing one is the D16Y8 manifold which is difficult to obtain, while the one that comes on the D16Z6 is marginally better than the OE one that comes on the city engine. Honda offers 3 different intake manifolds for the City/ Civic engines, one is which comes in the City engine, the second is the one that comes in the D16Z6 engine which most people are familiar with & the third is the odd shaped plenum manifold which comes in the 96-2000 D16Y8 engine. An Analytical Approach to the Honda Intake Manifold
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