thunderstruck507

iTrader: (18)

I agree. A 4.8 is good for cheap turbo fodder (boost til it blows and do it again) but I wouldn't bother trying to cam one or anything.

5.3 are just as cheap and start off with more potential.

green28

iTrader: (8)

I can't believe that two people said you can't make power with that intake on sbe....

burnout346

iTrader: (1)

I didn't see anybody say it wouldn't make more power.

green28

iTrader: (8)

Guess what I meant was stock bottom end or forged shouldn't have anything to do with the thread topic. gc302047 was spot on when he mentioned about a good set of head and a cam though.

Blk98Vert

iTrader: (2)

No but we have people saying you don't need it until 450 rwhp which is ridiculous to think

ls1freak33

iTrader: (16)

i beleieve the ls6 intake can hadle more than 450..? i could be wrong but i could of sworn i seen a ls2 bottom with ls6 making way more than 450, and of course it was turbo. i will have to find the car and i'll post it up on here.



EDIT

Found the car:
https://ls1tech.com/forums/vehicle-c...30k-8-sec.html

ENGINE: ERL364 c.i. aluminum LS2 block 6 bolt head conversion, 236/231 .601/.594 115* W2W spec from Cam Motion, Howards steel rods, Weisco custom 26cc dish forged pistons, ARP head & main studs, W2W oil pump, W2W 6 bolt ALL PRO cylinder heads, Comp 921 dual valvesprings, Smith Pushrods, Fel-Pro 6 bolt head gaskets, 99+ valve covers and truck coil brackets, Z06 Intake, ported, filled and polished stock throttle body, Hypertech 160 degree thermostat, ATI Superdamper, Moroso RACE oil pan, oversized relocated oil filter, run on Rotella synthetic

Blk98Vert

iTrader: (2)

Turbo changes everything. And thats an irrelevent comparison. I can make 400rwhp through stock manifolds should I say I dont need headers? I guarantee that car is leaving minimum 25hp/tq at the wheels by running an LS6

lemons12

iTrader: (71)

Justin, you can't compare FI cars with mods (especially intake/headers) when talking NA cars. They react COMPLETELY different.

His car would make more power with a different intake but it isn't needed.
It wasn't saying it was "maxed out".. They were saying that before XXXRwhp an intake swap won't yield results.. Which it will. Will an ls6 intake work at 1000Rwhp, sure.. Would a FAST make more power, absolutely. Is a FAST needed for a stock ls1? Probably not, ls6 would do... Would it make more power? Absolutely. Is it worth it for the money? Depends on who you ask.

Exactly.. Turbo car... Why spend a grand on a FAST setup when he can just change the spring/retune and make another 100Rwhp. Turbo- Bad *** heads/bad *** short block/BOOST the **** out of it for the power you want.

My6speedZ

iTrader: (18)

Comparing a turbocharged car to a N/A is a bad way to go about things. Yes will a LS6 intake work? Everyone agrees it will work, however in my way of looking at it once you begin changing you cam compounded with heads your engine is going to be changing the way it pumps air into the motor. A ls6 cam is what 208/217 I think?? It was designed around a stock motor. This is not to say it doesn't have more flow potential but when you start throwing much larger duration at it, such at the V2 the op has that's somewhere in the mid 230's. I would think that leaving the LS6 on that set-up would become a restriction.

I would feel pretty confident that any after market intake manifold would begin to pull away from the LS6 as the engine gained rpm's. Most of the results I've read where the 102 lost power was when it was being compared to another intake on a stock bottom end with stock heads.

There is no way around the fact that airflow will always be restricted to the weakest flowing component, so since the OP already has a cam and a set of head and headers with exhaust to make his motor breathe better the next logical step would be the intake manifold and throttle body. Seeing as he has already spent the money on the rest of his set-up unless he wants to put the money into his drive train or suspension then why not opt for the FAST it is clearly going to get him the most gains.

ws6man29

iTrader: (1)

BLK98VRT""""""""""""
You are not listening to what is being said.So we will try again.A ls6 intake on a 450 rwhp car is sufficent enough to not lose any hp.If we put a fast on inplace of the ls6 we would gain 3hp.Is it worth $1000 for 3 hp?Based on the fact the car owner does not want to go over 450rwhp.It does not warrant the bigger intake unless you are an idiot and would pay $1000 for 3 horsepower.Maybe the car owner who has 450rwhp is content and this quote will make him realize that $1000 can be spent on something else that he could get his money worth maybe suspension etc.

S8ER95Z

iTrader: (3)

I just saw a guy claim to pick up 30rwhp from a ported 90/90 swap on a low 400rwhp car.

http://www.ls1.com/forums/f63/adding...2/#post1102472

I don't think 2rwhp is the best you could see... every car is different. Definitely takes more research to be sure you want to drop the money for an upgrade like that but you should find plenty of results on here with a quick search.

thunderstruck507

iTrader: (18)

That statement is false though.

Unless something is wrong, the intake will gain more than 3hp on a STOCK car. A "450 rwhp car" will gain considerably more because to make 450 the car obviously has good flowing heads and cam...meaning the intake manifold is now the restriction.

From the sticky on ls6 intakes (which everyone in this section should read):
"LS1 intake vs. LS6 intake flow numbers.
.........................................200"..300 "..350"..400"..450"..500"..550"..600"

Stock LS6 head, LS1 intake....156...199...212...224...232...238...243. ..247
Stock LS6 head, LS6 intake....154...204...220...235...247...257...263. ..265


IIRC with better heads the ls6 has flowed around 275cfm. Which is pretty damn good...but what if you're heads flow 320cfm? Because if you're making 450rwhp I would bet money your heads are flowing 300+cfm.

You cannot just say parts are "good for XXX horsepower", many times they are relative to the combination.

ws6man29

iTrader: (1)

"""no no"" not 3 rwhp on a stock car! On a car that has 450rwhp is a waste for 3rwhp from a fast from an ls6.We can not cross the way its stated because it will misconstrue everything.

S8ER95Z

iTrader: (3)

I'm requesting your next response be in english. WTF?

ws6man29

iTrader: (1)

Hey pal if you cant read writing go back to bed loser,

thunderstruck507

iTrader: (18)

Did you even read my whole post?

On a heads/cam/bolt on car making 450rwhp, the Fast will make double digit power increases. A ported fast can be 25-30rwhp pretty easy over a ls6.

I don't know where you get this "3hp gain on a 450rwhp car" from and why it's gospel to you, but it's a trash number and if you spend some time researching and looking at dyno comparisons and dyno threads you will see it is consistently wrong to think a Fast will gain under 5rwhp on a head/cam ls1 unless there is some other restriction in front of the intake which was the problem to start with.

BOBS99SS

iTrader: (2)

there is so much fail in this post

My6speedZ

iTrader: (18)

Quote:

Originally Posted by thunderstruck507

IIRC with better heads the ls6 has flowed around 275cfm. Which is pretty damn good...but what if you're heads flow 320cfm? Because if you're making 450rwhp I would bet money your heads are flowing 300+cfm.

You cannot just say parts are "good for XXX horsepower", many times they are relative to the combination.

Well done! /thread

ws6man29

iTrader: (1)

Reply to your reply.
I have seen dyno test with a 450 rwhp ls1 with heads,cam and ls6 intake make the 450 rwhp I stated earlier.The guy put on a fast 102 intake and only seen a difference of 3 rwhp gain with the fast set up.So im simply saying that if you have 450rwhp or below a ls6 intake will do you good.If you are looking for more horsepower go with the fast .

S8ER95Z

iTrader: (3)

You can't tell me you actually think what you posted was coherent? I can read just fine.

FWIW this isn't going to go anywhere you are set on thinking there is a 3rwhp gain from the swap regardless of how inaccurate that assumption is.

If I watch a stock LS1 get a dyno tune and gain 1rwhp does that mean getting a dyno tune on ANY stock LS1 car is a waste of time? Not exactly... another car may gain 10rwhp or even lose 10rwhp power. They are all different and respond to mods differently.