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HP loss through generator/fanbelt?

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1916baja Custom Title Time!

1,990 posts · joined Sep 2007 ·

#830192
Hi guys,

Just wondering if anyone has an idea on roughly how much power is gained by running an electric fan and different cooling set up on a small drag race engine? Is it substantial enough to warrant looking into alternative cooling rather than the traditional generator fan and fan belt? Can you run a set up like this with a magnesium case on pump fuel?

thanks
Mick.

OZ Towdster Keen to finish some projects

1,921 posts · joined Dec 2003 ·

#830193
Mick ' i would personally not bother with this mod on a low budget car as it will lead to more drama's if not set up right especially for the bugger all power gain
Don't let body work get in the way of real suspension travel

1916baja Custom Title Time!

1,990 posts · joined Sep 2007 ·

#830194
Thats what i wan't to know.... How much do you really gain? is it worth doing....?

RISKY4LIFE Officially Full-On Dubber

308 posts · joined Jul 2010 ·

#830206
every little bit it worth it for a race car!

RodPenrose Insano Dub Head

792 posts · joined Apr 2005 ·

#830210
Michael , I have done dyno tests and with a std 7 1/2" size pulley you would gain 12 HP @ the wheels , or 9 HP with a 6 1/2" power pulley . This is when you run an alternator and wide late fan , ROD .
More boost + More fuel = More power
1968 Beetle fastest run 8.96 sec @ 161 mph 4th Nov. 2001
2010 New Beetle 8.12 sec on 8th march 2014
http://www.rodpenroseracing.com.au

whathaveidone Custom Title Time!

1,559 posts · joined Feb 2010 ·

#830211
think its worth 6rwhp. Do the fanbelt thing.I got my setup cheap,as i didnt have a cooling system when bought the car so it was worth it.It never gets driven except at the track.Not sure what it would be like on the street. Ruben tried it without much success. But as they say every bit helps. What are you building?????

1916baja Custom Title Time!

1,990 posts · joined Sep 2007 ·

#830219
Drag car project.... low budget. Not much different to how your rat started out really, although now yours seems to be getting the real race car treatment! It needs to be finished in roughly 20 weeks so i'm gathering alot of info and parts then i'll pull my finger out and get some real work done! It will never see the street.

OZ Towdster Keen to finish some projects

1,921 posts · joined Dec 2003 ·

#830221
Mick . just do what ever you want dude , as it's your ride .
Just like my rat everyone has there own idea's and i built mine to suit my tastes / uses , but just build it , don't stall on it for years as i have done with the Towdster.
As your fist drag car build , feel free to give me a ring and i'll give you some advice that will ensure it at least makes Warwick

Andrew
Don't let body work get in the way of real suspension travel

whathaveidone Custom Title Time!

1,559 posts · joined Feb 2010 ·

#830234
sweet!! you mean its only 20 weeks till warwick!!!! Good luck with it. Keep us posted

Gracey Wolfsburg Wizard

511 posts · joined Feb 2003 ·

#830237
RodPenrose wrote:Michael , I have done dyno tests and with a std 7 1/2" size pulley you would gain 12 HP @ the wheels , or 9 HP with a 6 1/2" power pulley . This is when you run an alternator and wide late fan , ROD .

Rod, at what revs did you record these figures?

matberry Moderator Go hard or go home

8,114 posts · joined Mar 2006 ·

#830242
Yes, I think rpm definately has something to do with it. I know of a dyno sesion earlier this week that saw 5 rwhp increase albeit at a lowish rpm (my guess around 4600).
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE

1916baja Custom Title Time!

1,990 posts · joined Sep 2007 ·

#830259
whathaveidone wrote:sweet!! you mean its only 20 weeks till warwick!!!! Good luck with it. Keep us posted
Ha! no.... We are only in March! 20 weeks till the baby comes and i can't play in the shed for a long time!

oldskl60 Officially Full-On Dubber

251 posts · joined Mar 2008 ·

#830353
Ha! no.... We are only in March! 20 weeks till the baby comes and i can't play in the shed for a long time!
Nah, you'll be right mate. Your wife will be that tired she will just go to bed and you go to the shed... but be warned you will have your balls fried if you start your car...

BTW we only found a 3hp difference when we dropped my belt on Leons dyno. I am running a 5.5 inch alloy pulley and 12v generator.

whathaveidone Custom Title Time!

1,559 posts · joined Feb 2010 ·

#830356
Its all good. My partner was due on sat and i still get shed time😂