BY CHANGING FLEX FAN TO ELECTRIC FAN WILL IT MAKE MY SB CHEVY HAVE MORE POWER I HAVE A 406 WITH DART HEAD AN FLAT TOP PISTON 10:8 COM WITH A SAT NITE CAM LIFT 505 TO 516
HID LIFTER.A LITTLE HELP PLEASE???

Please only post a question once! If someone has an answer they will help. I have deleted 2 posts with the exact same question! Also please turn off your cap lock. It's concedered shouting.

Electric fans don't put a strain on you engine the way a flex fan does... You need to be cautious if you switch, you need the right combinition so your street car doesn't overheat!

Welcome abord. You'll find this site very helpful...

------------------
...Dennis
Topless'69 (http://home1.gte.net/ddunio/topless69)
Camaros Limited Nor-Cal (http://camaroslimited.com)
rsss.fun@gte.net

JCAMARO,

In my DYNO testing, running an electric fan instead of a flex fan resulted in about a 3-4 HP difference. IMO that's not enough to jeopordize yourself with a potential over heating problem. I would keep the flex fan.

[This message has been edited by sr71bb (edited 09-28-2000).]

I run a pretty stout flex fan on mine and decided to do some on track testing. People say that these fans pull air at low rpm and flatten out a bit as the rpm's increase. I went to the track, made two passes with the fan and then two passes without. the difference was 100ths of second. I will say that I am leaving at 4500 rpm, so the fan may be pretty flat already, but I was suprised how little it changed things.

------------------
Mark
1992 Firebird 355/Six Speed
1991 RS 350 / 700-R4
1987 Toyota Pickup 383 / 500 + HP 10.963 @ 119.95 Slicks / 11.997 @ 114.23 Radials
http://personal.lig.bellsouth.net/~racer383/

You'd need exotic laboratory instrumentation and absolutely repeatable test conditions to detect any difference, assuming your flex fan indeed goes flat as it should. Don't bother to change it.

------------------
JohnZ
'69 Z28 Fathom Green