what did i say that doesnt apply to CPI
also efans should increase power sum when cuz the mechanical fan when it kicks in does take about 5-10hp to run
efans shouldnt even draw enough of the alternator to waste more than 1hp if the alternator is working properly it should be capable of being full-fielded and still not takin ne more than 1-2 hp away from the engine. Wheni was at school we put a 02 supercharged mustang running 5lbs of boost on the dyno ran 393hp at 5200 rpms 436ft lbs at 4900 rpms we then fullfielded the alternator during the second run with a micro vat and the reads were 391hp at 5200rpms 436ftlbs at 4900rpms and the alternator when full fielded is around 114 amps the alternator is rated at 110amps and a set of efans should only draw 5-15 amps depending

 

I cut off the metal pie shaped plate on the throttle body/ intake blade. I read a lot of debate about doing it before hand but decided to go for it. It was a free mod and it lets quite a bit more air into the throttle body withthethrottle open. Over 8,000mi and no problems.

 

I'll start with this. Single plane manifold... Does not apply to anything CPI or later with out a TON of other modifications unless you just go carb'd which isn't an option for a lot of people. Neither does larger injectors for those that are wondering. The CPI and SCFI injection setups do not have any aftermarket alternatives. Fuel pressure regulators are non-existent for the CPI and SCFI setups either without completely revamping the setups. Upgrading the fuel pump will require an upgraded FPR as the only thing you'll get from a hi-po fuel pump is higher pressure and flow. Higher flow without the possibility of higher flowing injectors does nothing. Higher pressure is the only way you would be able to get more fuel through the injectors, hence the need for a higher rated fuel pressure regulator.

The SCFI motors already come with roller lifters/rockers. Not roller tipped which may gain you a few tenths in the HP department, but is it worth the $$$ for that? Again, you would want to be exceeding the limits of the stock rockers... If you said a higher ratio rocker, I would agree.

I'm sorry, but two dyno runs don't give good enough accuracy to prove a point. A 2hp difference can be seen from run to run with no changes. I have seen as much as 10HP difference between runs on an engine dyno with all other conditions unchanged. Dyno's are good for tuning and getting rough baselines and such, but to be used in this manner, their tolerance is far to wide for two runs to yeild a definitive "this accessory draws 'x' HP" result. Now if you had stated that 5 runs were averaged with the alternator at full field and 5 runs with the alternator unhooked and the results were "blah", it would be a much more accurate statement.

Air flow is air flow and heat disipation is directly proportional to air flow in a heat exchanger (aka radiator). By saying that a fan will only draw 1-2HP while a mechanical fan at full lock draws a bit more (5-10HP is excessive, more probable 2-3HP) may be true, but a mechanical fan while drawing more HP when engaged will unlock, reducing parasitic loss while the efan will still need to be cooling. I do not know what the factory fan setup flows in CFM, but a comparable electric setup will require equal power from the electric motor driving it. Even more when you have to convert shaft HP to electricity and back to shaft HP. Now there are efficiency gains in the design of the fan blades themselves, but the '96+ fan design is quite efficient. Again, the older setups benefit more from a more efficient fan blade design, but on the newer motors, other than being a conversation piece and another mod to check off the list, in terms of effectiveness in a true HP to the wheels sense, you are better off spending the $$$ on a cam or headers on these motors. If you've already done those, have at it.

With that said, there are some cases where an efan will be beneficial due to the problems associat

 

3
$ = hp

 

You can get a chip, cai or throttle body spacer these are the cheapest the chip is about 30 the spacer is about 50 and the cai is about 40 on ebay each one says it will ad 10-15 hp by its self while all will help increase gas milage the computer i bought corrects the factory a/f ratios while the spacer will help the air and fuel mix more completely which increases effienciency which the cai will also improve. also ebay has conversion kits to go to electric fans or the ud pullys each of these free up power from your engine.

 

A TB spacer isn't really going to do anything on a port fuel injected engine... TBI or carbed, yes, but not much, other than add that annoyingly painful whistle/hissing noise...

The stock engine fan is capable of 4300+ CFM. No e-fan can match that, that I know of.
Like Kyle said, e-fans are only going to make a noticable difference on older engines, or someone who's got a seized clutch fan...
Other than that, the only real advantage to the e-fan is it warms up a little faster, since the stock fan always turns a little bit at idle.... It stops moving as soon asyou get up to speeds.


The throttle deflector EGR gas issue is only for people who have an EGR... Apparently I don't... I've got the AIR injection setup, so I could do it to mine with no real issues... Though, people have noted that sometimes it idles a little higher as well...


A bigger throttle body is kind of a waste of money on the 4.3L... Same thing as a bigger MAF... They're the same as what goes on the 5.7L V8. The only difference is the V8 has a smaller throttle deflector.

 

i have a throttle body spacer on my 03 blazer and a k&n cai. the spacer alone has absolutely no noticable difference. the cai alone has a little more pep and that puffing sound when you tap the throttle. together there is the most difference. mine is by trans-dapt, bought from summit racing. trans-dapt has 2 or 3 for the blazer, one is SUPPOSED to increase, low-end torque and the other a little bit of both. i have the "torque curve" and one of their main advertisement points is that it doesnt whistle, which they're correct. i did notice a slight gain in toque when all was said and done. i also have the dynomax superturbo catback system which definitely free up some ponies as well as adding a nice sound. if u want a mildly louder and deeper tone i suggest the dynomax. i bought mine on amazon for 150 or so. over summer i plan to remove the muff and add a dump along with either a super 44 or a spintech.