Throttle body question

merlin

merlin

merlin

Soldato
Joined
18 Oct 2002
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I got (hot) coolant going through mine & I really can't see the point. I guess it's to help out with very cold winter months?

Thinking I might just bypass it to keep things cooler.

Any side affects?
 
Its only to stop the butterflies from freezing up in very cold weather, common for this system to be ditched on 300's, along with EGR, AIV, carbon canister, and so on. Surprising the amount of stuff you can junk with no side effects. Less stuf to go wrong and less weight, win!
 
Cool.

I can't remember seeing temps lower than -4 last winter, and I guess this is only going to do any good at like -10c or lower.

Right, I'm on the lookout for more pointless crap now. :D
 
You might as well leave it as standard, the benifit will be so negligible that, to be honest, leaving it as the manufactuers intended is the thing to do :)
 
merlin said:
I got (hot) coolant going through mine & I really can't see the point. I guess it's to help out with very cold winter months?

Thinking I might just bypass it to keep things cooler.

Any side affects?
Click to expand...

Do it, not needed unless it's really cold and emissions crap. I wanna do the same on mine and fit a decent 'heatshield' gasket. Inlet manifold is red hot after a drive, no point having nice cold air into the manifold if the manifold then heats it before it goes into the engine. Also the inlet air temp sensor will see cooler readings = more fuel, no ignition retard = more power

Have you got an intake gasket yet? I think there is a water way from the heat that also heats the manifold in addition to the IACV heater where water is supplied via pipes

At least your manifold gets plenty of cold air, common thing to do on s2k is to duct cold air to the manifold to help keep temps down.

Definately a 'free' power modification though
 
Interesting, would it be worth while putting a heat shield to protect my alloy air intake pipe, after a good drive its very very hot, can hardly touch it!
 
Quite lucky with mine as the engine is the right way around ;) Inlet right up front, ex at the baulk head.

Regards the IMG - guess you can get the Hondata one too? Plastic jobbie?

Well, on mine - personally I dont think it's worth it. I've spent half a day with my car on the dyno - running the nuts off it - watching peak power figures. At that time it peaked at 208 atw, and point blank refused to go any further, it had done maybe 12 runs.

We sat down with a brew and left the fan on the dyno cooling the engine down - 30 mins later inlet felt quite cool.

Back on the dyno - 208atw again.

So, from absolutely nuclear hot to mildly cold - no hp difference whatsoever.

For the S2000 - it's worth it. For the DC5 it's a waste of money, imo.
 
Firestar_3x said:
Interesting, would it be worth while putting a heat shield to protect my alloy air intake pipe, after a good drive its very very hot, can hardly touch it!
Click to expand...

Heat reflective tape may be a better bet?
 
Yes but you have to remember air is moving through these at a vast rate of knots, the chance for it actually to heat up at all is negligible on an NA car...in high-boost situations it could well be different and not help, but probably still wouldn't make much difference.

My Sprint superheats it's intake manifold, a big old piece of cast iron and it makes absolutely no detectable difference in performance! :)
 
True, but depends whether your inlet is at the front, back or side.

The S2000 inlet enjoys jack **** in the way of airflow. :p
 
Yeah I shouldn't think it makes a difference, the 300 has a large intake collector which spans the top of the engine, it gets ridiculously hot. The reason we remove the water cooling (heating :p) is because the small hoses run underneath the collector which gets nuclear hot and they crack and leak which is a pain in the arse.
 
S2000 inlet temps are notoriously bad. Certainly if I was you I'd get that done, then sort some fresh air feed, it will make a difference. :)

Just not worth it on mine, as proven on the dyno.
 
My inlet is at the front of the engine bay, filter positioned to suck up all the manifold hot air (Great) but the pipe between filet + throttle body is at the front of the engine / behind the rad, might try and make a quick plate up, its easy enough to do :)

Reflective tape could work, i need to stick some of that on my current heatshield.
 
Simon said:
Your dyno :p

I would still think the inlet temp sensor would have not cooled down enough
Click to expand...

hmm, not entirely convinced, it cooled down so you could hold your hand on it...
 
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