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t/b bypass worth it?

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Old 11-07-2007, 07:04 PM
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Default t/b bypass worth it?

i'm biding my time until i get the $$$ the 427...in the mean time i'm doing little stuff.

is a throttle body bypass worth it?? does it really give you any measurable hp advantage?? i know that coolant is circulated up by the t/b to keep it from sticking in the cold, the car sees its fair share of driving in the cold and snow around here (delaware, maryland, pennsylvania), so is there any risk of the t/b sticking on me??
Old 11-07-2007, 07:09 PM
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it cost about 2 dollors and 10mins to do it. i did it for the hell of it i mean y not?
Old 11-07-2007, 07:10 PM
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i read an article that says its barley worth it but for like 5 bucks why not. ANd the smooth bellow too i built mine for like 6 bucks.... at least it kept me busy...
Old 11-07-2007, 07:11 PM
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Free mods, are worth what they cost.

Personally, I wouldn't bother messing with it. I don't have it done on my car, then again I do drive in the winter.

Either way, I don't think it's worth messing with.
Old 11-07-2007, 07:18 PM
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http://ws6.com/mod-8.htm

Even though its an LT1, I'm sure it's still mildly beneficial for an LS1
Old 11-07-2007, 07:19 PM
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i havent seen snow in years down here. i did mine and it took about 10 minutes. its fine just dont expect to feel anything from it.
Old 11-07-2007, 07:59 PM
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irregardless of if there is any power gain from doing it, it is worth it just to make it easier to remove the TB if you ever need to.
Old 11-07-2007, 08:07 PM
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Originally Posted by slayer_taunu
irregardless of if there is any power gain from doing it, it is worth it just to make it easier to remove the TB if you ever need to.
Good call on that.

Mine cost me nothing to do. I grabbed a piece of 5/16" hard line I had laying around, bent it 90*, flared the two ends, and installed it zip tied to the upper rad hose.

Made taking the throttle body off for porting two weeks ago really easy and mess free.
Old 11-07-2007, 09:27 PM
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Originally Posted by SS101
'99 T/A and a $60K parts list...
all this and building a 427 but yet your asking about a tb bypass and hp... i guess my priorities are way bakward
Old 11-08-2007, 07:05 AM
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i'd never heard anything definative on it either way...probably becuase i never bothered to look into it.

the 427 will never see the snow or cold weather so it won't matter about a tb bypass and i was having my tb removed for porting so i figured i would ask while i had the thing off anyway.

and dpw41285 please grow up and spare me your sarcasm, i'm sure you're really witty and all but even you have had newb questions at one point or another
Old 11-08-2007, 07:07 AM
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Why you would dump 60K into a 99 Trans Am amazes me, but anyway the TB bypass is worthless HP wise but it makes pulling the TB off easier.
Old 11-08-2007, 07:12 AM
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honestly...i like the way it looks and it would be faster and more streetable than putting $10k into a $60k corvette
Old 11-08-2007, 07:16 AM
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Or you can put 15K into a 10K trans am and be plenty fast. 60K is way beyond street car status, thats more like full out drag car status. You can build a 800HP street car for way under that amount.
Old 11-08-2007, 07:31 AM
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When I do my TB, it'll be done, but I havent bothered before that.
Old 11-08-2007, 10:21 AM
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All it takes is a 5/16" hose and 2 clamps, I have seen dynos, whether the gains may be small or not. I think a dollar or two per horse power is a pretty inexpensive cost no matter what the gain is.

I've seen gains any where from 3-6 horse power.

Cost me about 5 dollars to do it, so even on the low end of 3 horse power that's a horse power per 1.66, which is cheaper than buying an air filter, n20 kit, blower or just about any other power mod.

150 hp gain from a n20 kit costs a lot more than 250.00, it's more like 600.00
Old 11-08-2007, 10:25 AM
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A 3-6 hp difference is well withing the margin of dyno changes and tolerances. I wouldnt attribute the bypass to a increase in HP. I know even when i dyno my car 3 times in a row the variances are in the 3-6 HP range.
Old 11-08-2007, 10:50 AM
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Guess reducing intake temperature doesn't effect power, I must be wrong then., must be a dyno error.
Old 11-08-2007, 01:03 PM
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i did the tb bypass mod i went to find the parts myself and spent 5 dollars instead of buying the kit online i saved some money so just find what you need around where you live its cheaper but it doesnt make a big gain just a few horsepower or so nothing that you will feel but it is worth it for that few hp but it makes sense how it works i would do it its easy
Old 11-08-2007, 02:59 PM
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Originally Posted by chrismorales75
Guess reducing intake temperature doesn't effect power, I must be wrong then., must be a dyno error.
In theory colder air does make more power due to density, but a stupid tb bypass isnt going to do anything to affect HP. Besides you IAT sensor is located way before the TB anyway which is what the PCM uses to determine air temp.
Old 11-21-2007, 08:18 PM
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yeah that is true i have not seen anything on a dyno so i could not say it adds hp but everyone says it does they know more that i do about ls1 mods



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