DIY: Cheap HP

[jboyce]

Not sure if any of this would work, but just thought some of you might find it useful.

http://www.ultimateresourceguides.co...-freemods.html

[93accordexcoupe]

Modification Number Six: Throttle Body Coolant Bypass

This one I saved for last, and for good reason. This is
perhaps one of the best modifications that you can do for
basically nothing. As you'll see in the dyno below, which
is of my Integra LS motor in a 92 Civic hatchback, cold
vs. warm: I got back almost 10ft-lbs of torque over
the entire rev range. 10ft-lbs that was present in the engine
when completely cool, but once the manifold heated up
was gone.. This is good for about 0.2 seconds in
the quarter mile in my particular vehicle - needless to say
this is a great mod sicne it helps keep those temps down.

Above you see a diagram of how coolant normally flows
through a throttle body (illustration is from an Accord).
All you need to do on any vehicle is to take those two
coolant lines, disconnect them from the throttle body and
connect them with a coupler available in the vacuum hose
section of your auto parts store. It's basically two nipples
connected to each other that allow you to connect two pieces
of coolant hose.

If you have problems with erratic idle afterwards. You will
need to find your fast idle (or idle air control valve),
and disable it by blocking it off or somehow keeping it closed.
This occurs mostly in Hondas to my knowledge, and it's pretty
hard to explain in a "universal" manor.

how would coolant get to the TB if u disconected it?

[accordtunerx]

how would coolant get to the TB if u disconected it?

it won't if you bypass its flow to the throttle body. that's what he's telling you to do. normally, the coolant flows through the throttle body via hoses and heats it up so that a sensor can read how hot the engine is and adjust the idle accordingly... mostly used in the winter time (raises idle when engine is cold to heat engine up faster). but the sacrifice is that you don't always have as cool of air entering the intake. so thats why they bypass it.. to gain a couple hp. idk about 10... seems a little high to me..

i guess this would be a good mod for the summer time or before hitting up the track, but i personally don't want to leave it disconnected in the winter time.

[MRX]

its moreso like that so the throttle plate can't freeze shut.

[owequitit]

Actually Honda's CB7 thermostat is set up to bypass the TB coolant when the engine warms up.

[starchland]

^are you certain it bypasses after certain temp?

[MRX]

Actually Honda's CB7 thermostat is set up to bypass the TB coolant when the engine warms up.

problem with that is its still as hot as the engine!...eek

[Backfire32]

is it actually worth bypassing our tb coolant line?

[91accord4door]

is it actually worth bypassing our tb coolant line?

rear what accordtunerx stated above and you make your own decision. personally i wouldnt do it. but i dont race.

[cb7coupetuner]

wow

[Michalob]

i did that coolant line awhile abck, had a 2-way barb and a few metal clamps laying around. its great for summer just i would suggest putting it back to normal when winter time comes around (assuming you reach very low temperatures). midnight said it best, it may freeze and also it can fuck up the idle when your trying to warm-up. big inconvience im sure. i bleive it helps to a certian extent though. less heated air going in engine helps. its a mathmatical equation. i know i designed my own throttle body spacer, intake plenum spacer, and soon to do intake manifold made out of the same stuff hondata gaskets are made of.

and also dont forget this cheap modification. Sea-foam! 6$ a bottle and you can have your car running much better after a dosage of this... just make sure to do it right. ive had a nightmare with my buddies car. but he was a jackass.