ncd1966

iTrader: (2)

if anyone knows how much horsepower can you get from doing the egr mod and coolant by pass mod?

Wnts2Go10O

iTrader: (12)

for the bypass id say no more than 5 for the egr... prolly around the same.

Dustin 98TA

I would say maybe 5 for both, Its one of those "every little thing helps" mods.

Z28Venom

iTrader: (13)

Both mods combined, might yield 5HP total.

Humming Bird

hey i had a lsx intake manifold and 90mm TB, 85mm mass air flow sensor, long tubes, cattless y-pipe and cat back, as well as a custom tune and my car picked up 17hp 13ft/lbs from the egr and throttle coolant bypass. maybe you pick up more power the more mods you have done to your car. you know, cuz then be come more apparent restrictions to power after your car is breathing better. but im not sure so if anyone knows and im wrong then i apoligize. but ya my z28 picked up alot more power than 5hp.

-Q-

iTrader: (10)

Damn, I really need to do that mod then!

LS1LT1

iTrader: (16)

Wouldn't the EGR mod already have been done if you had a FAST 90mm combo? And for that matter wouldn't the throttle body bypass have automatically been done as well considering that most 90mm TBs don't have the coolant tubes running through them?
When we say 'EGR mod' we are talking about the simple 'cutting of the protrusion' that invades the hole on top of the intake on pre 2001 LS1 F-bodies correct?
Or do you mean total removal of the EGR system?

Flawless02SS

iTrader: (9)

yeah i'd say 5-7hp with both

Humming Bird

the removal of all of it. did he mean just cutting down the egr? i was confused sorry. ya i meant removing the whole system and doing the bypass, oh and my 90mm TB did have a coolant line

-Q-

iTrader: (10)

What do you guys think just the throttlebody bypass mod is worth? 2-3 hp?

cyphur

iTrader: (10)

MAYBE, if you're lucky.

-Q-

iTrader: (10)

I'll probably do it anyway, just for the hell of it.

ricekillman

The difference will be so insignifican that you will not see it on the dyno. The difference between pull one and pull 2 and three will be more then what you gain.