Flava

Am i going to need to wire up a resistor box if i use 550-650cc injectors?

BoostedEG6

depends if they are peak and hold or saturated.

If they are peak and hold. Yes you will need a resistor box

If saturated then no you dont

Flava

noob question, but whats the advatage or difference between the two injector types?

Turbo-LS

iTrader: (4)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Flava &raquo;</TD></TR><TR><TD CLASS="quote">noob question, but whats the advatage or difference between the two injector types?</TD></TR></TABLE>

Peak&hold injectors have a quicker responce then a saturated injector. For example a 750cc saturated injector at 400hp would be something like 85% duty cycle where as a 750cc peak&hold injector might be at say 78%. the more responsive the injector the better it performs. Thats why they dont make 1000cc and 1600cc saturated because they would be horribly slower then a peakhold.

basically with the hp your looking for and the size injector your running there is no need for a peak&hold. saves you the hastle of wiring in the resistor box, there just plug and play

Flava

im wanting around 300whp give or take a few at most.

so it wouldnt really be necessary to get peak and hold injectors?

Turbo-LS

iTrader: (4)

Correct, your not going to be running a really big injector where the peak&hold would perform better, the saturated should work just fine.

Flava

cool thanks a lot guys

Flava

almost forgot, what would be the duty cycle be at with 550cc saturated injectors with 300whp? would it just be better to get 650's?

Turbo-LS

iTrader: (4)

Well according to the calculations you would need a 650cc injector. but every motor is different and depending on your base pressure is what size injector you will need.

Personally i would go with 1000cc's and a resistor box, this leaves you room in the future for upgrades etc... and they are just about the same price

If you dont want to take that route i would go with the 650's and a base static fuel pressure of 50 psi

Flava

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbo-LS &raquo;</TD></TR><TR><TD CLASS="quote">Well according to the calculations you would need a 650cc injector. but every motor is different and depending on your base pressure is what size injector you will need.

Personally i would go with 1000cc's and a resistor box, this leaves you room in the future for upgrades etc... and they are just about the same price

If you dont want to take that route i would go with the 650's and a base static fuel pressure of 50 psi</TD></TR></TABLE>

i don't plan on making any more than 300whp.

i guess i'll go ahead and pick up a set of 650's then

Jay_Sensing

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbo-LS &raquo;</TD></TR><TR><TD CLASS="quote">Well according to the calculations you would need a 650cc injector. </TD></TR></TABLE>

On what calculator? I have made more than 300 whp on a set of DSM 450's before without going over 90% DC. Base fuel pressure was only 60psi as well.

Turbo-LS

iTrader: (4)

thats according to the rc calculator with a bsfc of 60 and 43 psi base pressure

alpha

Most likely. If they are low impedance, yes

Flava

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 0x64 &raquo;</TD></TR><TR><TD CLASS="quote">Most likely. If they are low impedance, yes</TD></TR></TABLE>

i checked and precision only makes 580cc+ peak&hold/ low impendance..

but rc has Saturated (high resistance) 550, 650, and 750 cc/min AND
Peak and Hold (low resistance) 550, 750, and 1000 cc/min

Turbo-LS

iTrader: (4)

RC makes up to a 750cc saturated injector

Buzzbomb

Depends on who you talk to. Ask Enzospeed if you need a resistor box.

BoostedEG6

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Buzzbomb &raquo;</TD></TR><TR><TD CLASS="quote">Depends on who you talk to. Ask Enzospeed if you need a resistor box. </TD></TR></TABLE>

lol I remeber that thread