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

 

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

 

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

 

<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

 

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

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

 

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

 

cool thanks a lot guys

 

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?

 

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

 

<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

 

<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.

 

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

 

Most likely. If they are low impedance, yes

 

<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

 

RC makes up to a 750cc saturated injector

 

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

 

<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