I'm not going to do a TB or intake upgrade anytime soon. But I just want to educate myself for future reference

I know the LS6 intake is a great intake. but I want to keep my car bolt on only, so when I near the end of my bolt on limits, this is one of the last things to squeeze power out of) I have looked at BBK and FAST. I know the fast is like 2,000 for 10whp. which sounds absurd. The BBK weighs twice as much but apparently it flows around 25% better, so you can get maybe 5whp from it. considering you can sell the LS6 intake for about 300 bucks and buy the BBK for 400ish, 100 bucks for 5whp doesn't sound too bad when you're nearing the limits of bolt on power. can the LS6 intake be ported to outflow the BBK or FAST?

now, the part i'm not too educated on is the TB.

does the LS6 use the same TB as a LS1? I hear that the TB is a great piece to modify/change to get some extra power. What size are our stock TBs? who sells modified TBs? cost? performance gains?

after I fix my headers, I'm planning on getting dual electric cutouts, and then getting the pulley for few more ponies. once that's done, that's all the bolt ones I can think of besides the intake manifold and the TB.

I just would like to get educated on the intake/tb setups

any proven setups that people use?

Here is a dyno chart I found. according to this i'd be better off with a 85mm or ported OEM tb and a stock LS6 intake. or spend the big bucks and get a FAST intake with a 85mm TB.



Thanks!

 

Thanks for asking these questions; I too am curious to see what people chime in with.
I know the stock intake manifold can be port-matched to your heads to increase flow, but I don't think much more can be done with it, and I seriously doubt you'd be able to get it to outflow an aftermarket unit.

They might only get minimal gains on a stock engine, but if you have heads+cam or increased displacement then they'll probably earn their price tag. I think this is really what they were intended for.

I plan on getting my stock tb ported (unless someone mentions a better idea). My understanding is that gains will be noticed in throttle response but not so much in SOTP acceleration.

 

bump

 

yeah, not alot of info about this I guess

 

The LS6 intake came stock on the '01-02 Camaro's and Tran Am's and of course the Z06. It's the best budget intake mod besides finding a used Fast. FYI the fast intake have gone from the 78mm, 90mm, 92mm and now 102mm. Find your self a used 90/90 for about $700-800 or get the LS6 for $250- 300 if you don't already have it. I did what you're thinking about and sold my ported LS1 TB and painted LS6 intake and bought a used ported 90/90 combo for $900 over a year ago. It was more expensive because I bought all new stainless hardware which come with the 92mm if I am correct.

 

If you're not worried about EVERY last bit of horsepower then save your money and go LS6. If you really want to squeeze out every last bit of hp/tq with your setup and can afford it then it's a no brainer. lol

What are your current mods??

 

just so you guys know, I am posting this on the Z06 section, so the car IS a z06 so it DOES have an LS6 intake

right now I have LG longtues, VR intake/power duct combo and corsa pacecar exhaust.

next mod is the smaller/lighter crank pulley (is that the mod? friend told me about a lightweight crank pulley that makes a decent power addition)

after that there isn't anything left that I can think of to keep the car bolt on and make more power

The car will stay NA and there will be no heads/cam work. STRICTLY bolt on mods.

 

In the high Hp. Above 400whp the stock (smallish) TB becomes the bottleneck here. You can gain some by getting the stock TB ported which is cheap and probably worth ~5hp on a cammed and bolt on car. You can go further With the stock LS6 intake and send it to TPIS to get thier 90mm conversion for $350, and can use an LS2-LS7 style 90mm TB and have similar gains to a FAST setup. I remember some tests by Lingenfelter on a 550hp motor the TPIS LS6 and FAST 90 were within 5hp on a dyno comparison.

Here's a link to the Lingenfelter website referencing the TPIS LS6 mani.
http://www.lingenfelter.com/mm5/merc...egory_Code=C35

Note: the TPIS LS6 mani put out 571hp whereas the FAST put up 575 on a 427 cube motor.

 

If thats the case I'd just port the stock TB for ~$100 otherwise you'd just be wasting your money at the bolt on power level with a manifold that accepts a larger TB.

 

You can easily port the stock TB your self. OP: Wanted to assume the obvious that you own a Z06 but wasn't sure. Have any pics?

Yeah... I had a Powerbond UDP on my Z. Electric WP??

 

I'm looking to go this route also on my ls6. I plan to get the tpis ls6 intake and an ls2 throttlebody with the conversion harness for the tb but from what I've read it has to be the tb from an 05-08 ls2 because the 09-10 ls2 tb's are different and seem to cause alot of problems. Can anyone confirm this?

 

I used a TB from an LS2 with Caspers adapter harness and it worked without issue. Guys with the 09+ years are throwing codes and having reduced engine power mode issues. I'd try to find an earlier one to be on the safe side.

 

Can u post a link of the caspers adapter harness? I wanna make sure I get the right one. I already screwed up and got an ls2 tb from a 2010 vette so now I gotta sell it. Thanks in advance.

 

http://www.lingenfelter.com/mm5/merc...w=&range_high=

 

Thanks! I got a couple more questions for you.

The pcv hose from the valve cover that goes to the ls6 tb.....where did you end up plugging that into after you converted to the ls2 tb? Did you tap a hole into your air intake tube? Sorry for all the questions.

 

I drilled a hole in the airbridge and plugged in a grommet with a male end to plug into with the valve cover breather tube.

Yes, LS2 TB

 

Thanks for all your help!

 

Here's what you can do. No one has mentioned a meizere water pump yet. That bolt on can net you 10hp. Stay with the stock ls6 setup and port it. The BBK is not a bad intake. Alot of guys think cause it is metal it gets heat soak. That was not my experience. I have a FAST 92/90. It is expensive and the "real" gains are in throttle response not raw hp gain. Your real question here is how would a LS2 intake and tb work on your car (stock cam and headers) my guess is not enough difference over a ported ls6 setup to be work it. The graph you posted I would bet is a mildly cammed car. Without a cam, or power adders you will struggle to get there.
Meizere Water Pump = 10hpish
25% UD Pulley = rev quicker
Headers if you don't already have them = 10hpish
Port your ls6 set up= 5 hp
catch can = less gunk in the intake

 

Stock ls6 intake manifold outflows stock ls6 heads...just sayin'.

 

Excellent idea regarding the EWP & UD.

A properly ported Fast 90/90 will show much bigger gains. There are not many I would trust with that other than Tony Mamo. You will need the plug & play harness adapter for the LS2 TB. The grief is finding someone who can tune that correctly for drive ability.

The new Fast 102 again ported properly will have a few more ponies, some of our cars have fit issue with this intake. Mine is one.

Tony Mamo is very friendly & approachable, his knowledge of these motor's & what works will help sort the Internet myths. Call em up he loves to talk power.



Just thought of one more, 3" cat back form LG. You check out there web site for back to back dyno's runs.