INSIGHT: New stingers in IndyCar tails for the Indy 500
A change to Honda’s exhaust configuration that was first noticed in pre-season testing has made the minimize for the Indy 500 and past.
IndyCar’s engine guidelines enable its engine suppliers to develop new exhaust techniques every year, with two provisos. First, the altered exhaust design have to be submitted for homologation by the sequence no later than 30 days earlier than the primary race, and whereas the manufacturers can use the previous or new exhaust previous to the Indy 500, whichever model is deployed at Indy have to be used for the remainder of the yr.
Honda Efficiency Improvement elected to put in its 2020 exhaust configuration to open the season whereas making use of the additional time to have its 2021 design mass produced to produce the 17 Indy 500 entries making use of its 2.2-liter twin-turbo V6 engines.
With the beginning of observe on the Speedway on Tuesday, Honda’s resolution was apparent because the twin-pipe association final seen in testing changed the previous single-pipe design on show from Spherical 1 at Barber Motorsports Park by means of final weekend’s Indy Grand Prix.
Chevy took a special method, bringing its new exhausts with curved sculpted retailers into service at the start of the championship.
It was no shock each Chevy and Honda declined to discuss their respective exhaust developments for the Indy 500, and the change for Honda is the one outwardly seen distinction between the dueling engine packages with the bodywork put in.
Honda’s return to particular person engine and turbocharger wastegate exhaust retailers sprouting from every financial institution makes for an attention-grabbing journey down Dallara DW12 Reminiscence Lane. (All pictures by the writer.)
Beginning with what’s on show this week, check out Honda’s therapy with the smaller wastegate exhaust pipe on the within the larger pipe main from the cylinder head to the turbo and out by means of the sidepod.
One other have a look at the brand new Honda configuration with impartial engine and wastegate exhaust pipes.
Within the 4 races previous to the Indy 500, Honda used its 2020 exhaust which fed the wastegate into the primary pipe to create a single outlet.
Right here’s one other have a look at the mixed format, with the wastegate pipe seen, together with the beaded welds attaching it to the primary outlet.