Hey guys I just did the coolant bypass mod and it was a breeze! The hardest part for me was to get the coolant line off that is on the driver side. I had to heat it up with a hair dryer for a couple of minutes and then it came off pretty easy. I used a Cambel Hasfeld hose repair kit that comes with a 3/8's inch fitting and some half inch hose clamps and it slipped on perfectly with some help with the hair dryer again. Once I got it all hooked up I added like a pint of water to the radiator and started it up for to check the coolant temp and for leaks. It checked out ok and after Idaling for like 10 minutes the TB was still cool. I then took it out and drove it for 20 minutes to make sure the engine compartment temps were up there and then I launched the car and banged through the gears and you can tell a difference but its real slight. If I would have done it at the same time that I port and polished the TB and the bump stop you would have noticed it more when it all added up. All together with the 3 mods it feels like she picked up about 5-7 hp to the wheels. Gotta love those free mods! When I got home I popped the hood and put my hand on the TB and it was still pretty warm but you can keep your hand on it without it burning you and its alot cooler then befor. Oh and I almost forgot, I got the kit from AutoZone for 3$.

 

Sorry but if you can feel the TB by-pass mod, or even 5rwhp difference on the street you should go work for Ferrari F1 and charge ~$250,000 a year.

Placebo effect I think.

 

^ the bypass isnt all he did.. had to skim it a few times to notice what the other mods were -because i know the bypass didnt do anything noticible.. the ported tb, is the only thing that youd be able to feel a difference with, and i noticed mine.. if the ported tb only gives 5rwhp maybe i should work for 250k a year lol i wouldnt mind, my sotp meters good with 5 and greater gains..

-and the modding begins.

 

yeah its hard to read the post, but it looks like they did the other mods at different times.

However noticing the performance of TB porting is quite expected as it's altering the breathing of the car and will affect throttle response as much as it does speed, this is what most people probably notice.

TB by-pass doesn't affect the breathing of the car, not directly anyhow.

 

300bhp, just wondering, do you have anything done to your LS1?

 

I said that I noticed a 5-7 hp increase with the Throttle body ported and polished, Bump stop and bypass mod. I know that I wouldnt get 5-7 out of just doing the bypass! LOL

 

I don't know about you buy my *** dyno isn't calibrated enough to "feel" 5-7RWHP. I bet you run faster when you get new shoes too.

 

 

if you get a friend to drive your car, and you run beside it..I bet the car will win,due to the TB Bypass Mod alone.

 

So you guys are saying that Doing all those mods would not add up to 5-7 HP??? You gotta be kidding me, there has to be at least 5 HP more to the wheels. I dont know how you wouldnt feel those mods espesially the throttle response its so nice and crisp now. And I forgot to mention that I did the Fernco mod as well but that was more for looks then performance but it does all add up in the end. The car does pull harder from 4-6k RPM and maybe my *** is just calibrated a little better then yours. And this is the first time that im able to chirp third gear again since I put my 285's on. It does it every time now versus once in a while.

 

I got a bunch of tuning done on my car and it picked up over 20RWHP, that didn't make it drive THAT much different.

 

Ok then I guess its all in my head. Doing all that work added up to 0 hp to the wheels.

 

Not much yet, just a few bolt ons and FRA/ported TB.

And I know where this is leading also. Remember physics is physics at the end of the day and I', resonably well up on modified vehicles (I own 2 others which are far from stock).

 

Porting the TB can be worth 5-8rwhp no problem depending how well it's ported. This however is pretty much the only "free mod" that I can see as being worth it. This is looking at it from a pratical and a physics point of view.

The FRA mod makes sense but only for high speed use, for drag racing it will probably result in too high ambiant air temps under the air box due to heat soak.

The throttle bumpstop mod can be worth something, but each TB is different. Some will see more gain from it than others.

After doing the FRA (free ram air) and bumpstop I tested the car. From 0-100mph there was no noticable difference really, except slightly more travel on the throttle pedal. At high speeds it did feel crisper and picked up better, a 120 to 140mph pull was noticable quicker, but I think we would still be talking tenths of seconds.

At WOT (wide open throttle) the intake air moves too fast thru the TB to be significantly affected by having the hot coolant there. Also the intake manifold is plastic so therefore heat soak from the TB is not an issue.

Again this is not a mod to make power. The stock bellows flows fine. And there is good evidence to claim a smooth surface isn't as good. Take a golf ball for instance, it purposely has dimples on it (96 I think for US and 93 for UK). These create a better transitional zone from the boundary layer which reduces friction. A smooth ball would not travel the same distance when hit.

No I believe it does pull harder, but IMO it's mostly down to the ported TB.

But the placebo affect is well known. Such subtle variations are beyond human means to consistantly and accuratly quantify.

That's good, but there are many things that could cause this. Tyre wear, ambiant temps, humidty the roads being driven on, a slight change in drivng style.

No, some of it may be in your head. And I'm sure it has generated some HP. But there are lots of mods out there (free and aftermarket) which will have ZERO affect or even worse cost you HP and performance.

Understanding 'how' and 'why' something does what it does is important. You can then dicide on which mods will work for your application.

 

This quote puts it all in perspecitive. Even some major mods don't make the car feel dramatically different. My experience is that the improvement in sound with exhaust mods will make the car FEEL much faster than it actually is.

20 RWHP = improvement that you can "feel" but is not ungodly.
3-5 RWHP = improvement you would like to "feel" in order to justify the mod, so you keep trying until you convince yourself that you are "feeling" something.

 

300bhp/ton I agree that I am feeling the tb more than anything I simpy just stated that all the mods added up to 5-7 hp sorry if you miss under stood the statement. I did not do the FRA mod but I did buy the kit from whisper and picked up 2 tenths of a second and about 1.5-2 mph consistantly with the kit, you should check it out its pretty cool. It comes with an extra piece then the SLP one that extends all the way down to the front lip spoiler under the car.

 

You can deffinately feel the difference with the p&p tb, but nothing with the tb bypass. Why would you not be able to gain at least 5hp from that? These mods didnt even compare to when I got the diablo sport, but you can still feel it.

 

AGREED!

 

Can't we all just get along.

 

I ordered a shaner s3 and I am going to do the throttle body bypass just cause it is already off. I don't know if the bypass will help but what the hell....