Haltech F10 Manual do Utilizador descarregar pdf (Página 94)

APPENDIX C FUEL SYSTEMS & STAGING

Insufficient fuel f low can lead to lean fuel mixtures resultin g in h igh ch amber temperatures

and detonation which could cause serious damage. For the safety of your engine, we urge you

to check your fuel sy stem's cap acity and ensure that there will be sufficient supp ly at all

times. A fuel pressure meter should be used during testing and tuning to ensure that fuel

pressure does not fall out of regulation, that is, the fuel pressure does not drop or oscillate.

This app endix offers guidelines to testing y our fuel sy stem and suggests some solutions if

there are supply problems. If you find you need to modify your fuel system and are unsure

what to do, contact a Haltech dealer for advice.

WARN ING:

FUEL IS DANGEROUS. BEWARE OF FLAMES, CIGARETTES,

ELECTRICAL SPARKS, ETC.

C.1 Fuel Requirement

If you can estimate the p ower output of a gasoline en gine, y ou can make a reasonable guess at

the fuel flow requirement. A good estimate may be expressed in metric or imperial units as

follows:

Note: Every 100 hp needs around 50 lb/hr (8.0 US gal/hr) of fuel

(6.6 Imp gal/hr)

Every 100 kW needs around 670 cc/min (40 L/hr) of fuel

This assumes a brake specific fuel consumption of 0.50. The actual fuel flow necessary by

injectors and p ump are likely to exceed a figure derived this way . This is due to the

overheads in injector dead time and pumping return fuel to maintain regulation.

C.2 Injector Flow Capacity

If you have purchased second hand injectors, or have removed the current injectors while

doing work on the engine, we strongly recommend that you clean and flow test them. If you

have bought new injectors, it is worth flow testing them anyway if you do not know their flow

rate. Make sure that you test the injectors at the fuel pressure that your regulator is operating.

Your total injector flow capability is given by the sum of the injector flow rates. Injector flow

rates are usually specified in either cc/min or lb/hr. Check that you have enough injector flow

to match the estimated power output comfortably. Keep in mind that you do not want to

exceed 85% duty cy cle injection “on” time. At high rpm, injector dead time can consume a

significant amount of available injection time.

If you find that your injector flow is insufficient, you can change to larger injectors, add extra

injectors, or increase fu el p ressure. Raising fuel pressure to increase injector flow rate is not

recommended if the desired flow is more than 20% than the system currently achieves. Fuel

1 2 ... 89 90 91 92 93 94 95 96 97 98 99 ... 103 104

Comentários a estes Manuais

FrankRib 14 May 2024 | 06:56:21

Elevating decks in mountainous areas through the careful integration of planters and lively greenery introduces a invigorating touch of nature to living in the mountains. Engaging in talks about the individual types of plants that flourish in mountainous settings, investigating suitable planter options, and considering design aspects provide useful guidance for individuals looking for to create green and welcoming outdoor spaces. Through the exchanged experiences of forum members, taking into ac

Haltech F10 Manual do Utilizador Página 94

Comentários a estes Manuais

Manuais e produtos relacionados com Para o carro Haltech F10