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Class Legality

IHRA · Fuel

Aftermarket fuel injectors, IHRA

IHRA answers this part for 24 of its classes. 5 of those answers permit the part outright and 3 permit it with stated conditions, leaving 16 that do not. 3 of the ones that do not are classes we read as open rather than as refusing it. 9 are inferred from how the class is written rather than quoted from a rule naming this part.

This page is IHRA only, and the bodies do not agree. The same part under IJSBA. Which one applies to you is decided by whoever sanctions the race you enter.

Where it stands, class by class

24 classes, grouped where the same rule gives the same answer rather than listed one by one, because an answer that holds for a class usually holds for every class that borrows its rules.

What each answer below means

OEM part required
This comes off. Only the part the manufacturer fitted is allowed here.
Not permitted, not listed in the rules
Treat it as coming off. The class requires the craft to stay stock except where the rules allow otherwise, and this part is not on the list, so this is our reading rather than a rule we can quote at you.
Legal, with conditions
Keep it, but measure it: the rules permit this part only inside stated limits.
Legal
Keep it. The rules permit this part in this class.
No rule, this is an open class
Probably keep it. The class carries no stock clause at all, so anything unlisted appears to be open. The rulebook does not say so in terms, and this is our reading rather than a permission anybody wrote down.

OEM part required 1 class

Four-stroke entries: Must remain OEM. · Z.4.3

OEM part required 1 class

The injectors stay as the manufacturer supplied them, because P.1 applies the Four Stroke Ski Lites fuel system rule to four-stroke entries without exception. · P.1, N.3.2

Legal, with conditions 1 class

May increase fuel flow but must not enhance airflow into the chamber. Extra injectors allowed. · K.4.3

Legal, with conditions 1 class

May increase fuel flow but must not increase airflow into the chamber. Extra injectors allowed. · X.3.5

Legal, with conditions 1 class

DD.7 caps the craft at four injectors ("4Injectors Max"), and this cell reads that cap as presupposing aftermarket or added injectors up to that count. DD.7 sets no other injector limit. · DD.7

Legal 1 class

Four-stroke entries: Aftermarket permitted. · BB.4.6

No rule, this is an open class 2 classes

The class states only what it bans and calls itself run what you brung, against a section DD preamble that says anything unlisted is illegal.

No rule, this is an open class 1 class

No restriction in section CC, and CC.1 permits any modification it does not restrict.

Aftermarket fuel injectors: if the rule your class applies reads differently to you, or the rulebook has changed since this was read, ask. We answer with the section we read it from, or that we have not read it. Ask a rules question.

Every IHRA class · where the rulebooks differ · checks on parts the shop sells · how this site reads a rulebook.

Fuel · four stroke · legal in 8 of 24 answered, 3 with conditions

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BaddJet Class Legality