Has anyone bought/installed the ls1 weiand intake?

**Mr.Lee** · 05-25-2009, 10:35 PM

Hey,

Has anyone installed an weiand intake manifold on their ls1's yet? If so, do you think it's worth it and did you "actually" make a gain from it??

**c5z28** · 05-25-2009, 11:23 PM

Just about everyone will tell you the heat soak will rob you. Most people will agree to get the ls-6 manifold to keep temps down and a proven 10whp.

**Y2KPewterSS** · 05-26-2009, 07:21 PM

The Weiand intake also weighs ~25 pounds versus the lightweight composite LS6.

**Mr.Lee** · 05-27-2009, 12:50 PM

Aite, ls6 it is! thanks guys!

**anniversary30** · 05-27-2009, 01:02 PM

just sinkthe cash and get the fast!!!!

**c5z28** · 05-27-2009, 01:11 PM

Originally Posted by anniversary30

just sinkthe cash and get the fast!!!!

Sure you loan us the money

at any rate unless he has a cam at the least he will hurt his torque curve

**anniversary30** · 05-27-2009, 01:16 PM

Just bustin balls, I was going to do the ls6 untill I decided to put heads on.

**Mr.Lee** · 05-27-2009, 08:11 PM

i don't have a cam, just whatever the 2000 ws6 came with, but i do know the 98-2000 ls1's came with bigger cams?

**c5z28** · 05-27-2009, 09:35 PM

Originally Posted by Mr.Lee

i don't have a cam, just whatever the 2000 ws6 came with, but i do know the 98-2000 ls1's came with bigger cams?

yes but the 2000 had a smaller cam-believe me you would never know anyway.

**c5z28** · 05-27-2009, 09:36 PM

Originally Posted by anniversary30

Just bustin balls, I was going to do the ls6 untill I decided to put heads on.

Did you do head only?

**anniversary30** · 05-28-2009, 04:02 PM

actually the project started out a ls6 intake and a cam. Found a few extra dollars and it jumped to a fast intake and thottle body 90mm a larger cam , dart 225 heads , 36 lbs injectors , fuel pump , underdrive crank pully and a new tune.

**Dr.Crash** · 05-29-2009, 11:12 AM

Originally Posted by anniversary30

actually the project started out a ls6 intake and a cam. Found a few extra dollars and it jumped to a fast intake and thottle body 90mm a larger cam , dart 225 heads , 36 lbs injectors , fuel pump , underdrive crank pully and a new tune.

Thats not to far off of the ls6 with a cam.........

oh and the weiand will prob never come out. but you can wait if you want

**mpfranks** · 05-30-2009, 01:18 PM

i installed a weiand ls6 intake to my car. i noticed improvement. i really dont believe this nonsense about heat soak. other than a few annoying things during the install i like it. its cool too because its the john lingenfelter edition, and as we all know, that guy knows a few things about ls1's...

**Mr.Lee** · 05-30-2009, 06:12 PM

Hey mpfranks!

I notice u modify ur ls1 coolant lines to fit the weiand manifold...if u cut and braze as the instructions tell u where did u hook up the coolant line to the throttle body?

and i i'm thinking of getting a weiand too, 370$ a good price brand new?

**mpfranks** · 05-30-2009, 08:11 PM

Originally Posted by Mr.Lee

Hey mpfranks!

I notice u modify ur ls1 coolant lines to fit the weiand manifold...if u cut and braze as the instructions tell u where did u hook up the coolant line to the throttle body?

and i i'm thinking of getting a weiand too, 370$ a good price brand new?

you have to modify your coolant lines for any ls6 intake unless you have a 01-02. the bottom of the ls6 intake is different than the ls1, there is no valley on the ls6. and no, i have an 80mm throttle body, so i got a new piece of hose and did the TB bypass. i think thats about what i paid too. i am happy with the gains from my weiand, but i did have a few complaints during the install. i wrote about it in the other thread.

http://www.ls1.com/forums/showthread.php?t=114361

**Mr.Lee** · 05-30-2009, 08:55 PM

ya i have 2000, so i guess i'll be doing some modifying. Are the gains 4000 rpm and up? approx 15 rwhp?

**mpfranks** · 05-30-2009, 09:03 PM

Originally Posted by Mr.Lee

ya i have 2000, so i guess i'll be doing some modifying. Are the gains 4000 rpm and up? approx 15 rwhp?

i couldnt tell you the hp gains, ive never had my car on a dyno. but yeah, definitely an increased power band. that was the first thing i noticed. youll get the same gains as the gm ls6 intake, im sure its within a couple hp.

**robcas47** · 05-30-2009, 11:23 PM

I thought weiand advertised around 30hp/tq on their intake? I am planning on this intake and probably the hot cam kit in the future. Glad this thread came up cause I was about to ask the same question.

**mpfranks** · 05-31-2009, 08:27 AM

Originally Posted by robcas47

I thought weiand advertised around 30hp/tq on their intake? I am planning on this intake and probably the hot cam kit in the future. Glad this thread came up cause I was about to ask the same question.

im sure they say 30hp but thats on the motor. its about 10-15hp to the wheels