TB Hot water bypass

[edthefox5]

Originally Posted by BT Tech

I have done this mod on a number of LSx based corvettes including my own and it is worthwhile and costs next to nothing to do.

As the OP has pointed out correctly, the purpose of running the heated coolant through the TB was to decrease any chances of the throttle sticking during severe cold weather which btw is NEVER a chance here in South Florida!!

Anytime that you can lower your intake ambient temps (IAT) this is a good thing as it will most often result in slightly higher hp/tq and reduced chance of detonation occurring.

IMO this is a great mod for near little cost and effort....

Great post Edthefox5!!

Thanks alot Brian. Just wish I had better performance from it. Other cars I have owned down here responded so much better to this easy mod.

[F8L]

Edthefox5,

I tried a couple tricks with the airbox like you did and could not produce and quantifiable results either. I was at the track and tried removing the airbox lid, then just the airfilter, then the tubing etc. and nothing seemed to make much of a difference in ET or MPH. The only big effect on my ET/,PH was how hot the inverter may have been getting with back to back runs in 100deg temps. My times were all over the place! Haha


If you end up collecting more data please post it up.

[ken1784]

This is an interesting attempt.
Following guy is trying to do the other way around, trying to heat intake manifold for increasing efficiency.
Yahoo! Groups

However, he also doesn't show us the numeric results.

Ken@Japan

[statultra]

f8l when the inverter temp goes up like reallly up it makes the pull more.

my inverter water pump burnt out, and i was running around with a overheating inverter ( no warning lights until it hit like 122 F ) but the power was amazing

[F8L]

Originally Posted by statultra

f8l when the inverter temp goes up like reallly up it makes the pull more.

my inverter water pump burnt out, and i was running around with a overheating inverter ( no warning lights until it hit like 122 F ) but the power was amazing

Interesting. I was told it may of been the cause for my times going downhill so bad. Next thing ya know people will be installing nitrous bottle warmers on their inverters for mo powa! haha

[SparrowHawk60]

Are you kidding me? Cars back in '60's had warm air directed to the carburetor to prevent icing. -The air cooled VW's had it since '50's.- Not only for the carb but for the intake manifold as well.
Yes, the colder the ambient temperature the more susceptible the throttle body would be to icing. But this is a closed system due to the ducting to the air cleaner. The air is warmed (maybe not heated) while passing through this duct work due to the engines heat. Some of this ducting may contain vent hose's directly from the engine, adding even more warmth.
In short if you want cooler air, open up the air cleaner system, remove any sound baffles, diverters, until air goes directly into the filter.
Most air filters are very restrictive, and get more so as they get dirty. Aftermarket cone type filters work much better, and better still with 'piping' directly to the throttle body.
Forget by-passing the cooling! It's there for a very good reason. Any cooling, any at all retards heat transfer to the "butterfly", I wouldn't worry so much about it freezing as I would it seizing!

[supernoob]

Originally Posted by donee

Hi All,

You know, one might get a thermostatic valve, that senses the temp of the trottle body, and lets coolant flow through the TB whenever the TB is below say 50 F. Sounds like something you might be able to get at McMaster Carr, or on EBAY.

Good idea. Such a valve is found on the Lotus Elise.

[statultra]

sorry to bump, but this modification proves to be very important especially since i moved to south florida, since summer hit us here im seeing my IAT reach 120-130 degrees almost 150 sometimes, im going to attempt this modification tommorow and record results here