what whp do you think i will be at max duty cycle with my rc 550s

i have a 255lph pump, and im getting an aeromotive fpr as well..

it is an 89mm h22 with t3/4...
i might have to order 880s if these will be maxed... im looking for high 300s maybe 400 whp

anyone acheived 375+ whp on 550cc???


Modified by Boosted 01 SH at 7:52 PM 2/9/2005

 

anyone?

 

I used the calculations on http://www.rceng.com and for 550's at 85% duty cycle they'll only be good for around 300 HP. 650's are good for about 350 HP and 750's are good for about 400 HP.

However for those above calculations I used .6 as the BSFC. If you do the math for BSFC for your setup, it comes out to .5 BSFC.

So at .6 BSFC & 85% duty cycle
550 - 300 HP
650 - 350 HP
750 - 400 HP

And at .5 BSFC & 85% duty cycle
550 - 355 HP
650 - 420 HP
750 - 485 HP

 

thanks alot... looks like ill be getting at least some 750s sometime soon, i figured loll

 

tweaking fuel pressure a bit might be able to squeeze a little more too, i think, but im not sure..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boosted 01 SH &raquo;</TD></TR><TR><TD CLASS="quote">tweaking fuel pressure a bit might be able to squeeze a little more too, i think, but im not sure.. </TD></TR></TABLE>

I did the math for that too:

Say we are going from a fuel pressure of 43 up to 53 PSI on a set of 550 injectors.

(new FP / old FP) square root = A
multiply A by the injectors size that you are raising FP on = new flow rate

(53 / 43) square root = 1.1102 x 550cc = 610cc (new flow rate)

 

thanks