Performance parts = horsepower

[blk_jaws]

If I was't to install
1. Flowmaster catback
2. Long tube headers
3. y pipe
4. LS6 Intake
5. 80mm Throttle body
6. 85mm MAF sensor
7. Lid
8. 3.73 gears
What kind of horsepower gains am I looking at?

[Hurley711]

scratch #1 & #6 off your list......go with a Hooker CB or Magnaflow CB and keep your stock MAF

[blk_jaws]

Well even if the flowmaster does'nt produce great power I love the sound. I have a 80 series muffler on it now. 98 TA

[JerseyLS1TA]

Ditch the Flowmaster, it may sound ok but it is one of the worst flowing catbacks. Keep the stock MAF and I would just have the stock T.B port/polished.

[GottaHaveLS1]

I would say close or over 60 HP.

[GottaHaveLS1]

Gutting the cats would help a lil too...

[blk_jaws]

Know one has answered my question about the power gains. I dont care if the flowmaster sucks to anyone, I would not trade the sound for the power.

[blk_jaws]

Thanks you GottaHaveLS1 for answering my question

[Zboner]

i say throw a tune in, and it could get 70.

[GatorSS]

#8 will have no effect on horsepower.

[SeVeReDiStOrTiOn]

Know one has answered my question about the power gains. I dont care if the flowmaster sucks to anyone, I would not trade the sound for the power.
That's the first time i've seen someone write that...if you insist on the flowmaster at least get a electric cutout, that way you can have sound and power when you want it.

[Hurley711]

No need to get testy with the attitude. You ask about performance parts and hp gains and when we tell you Flowmaster won't give you gains you 180 and say I wouldn't trade the sound for power....well which one is it? Gains? or sound? We were just trying to steer you in the right direction for power gains which Flowmaster doesn't give a whole hell of alot of, if you wantt the Flowmaster cackle that's fine.

[nhraformula]

If I was't to install
1. Flowmaster catback
2. Long tube headers
3. y pipe
4. LS6 Intake
5. 80mm Throttle body
6. 85mm MAF sensor
7. Lid
8. 3.73 gears
What kind of horsepower gains am I looking at?
flowmaster is about the worst catback out there, i had one.
it did make 7 rwhp more than the stock exhaust though.

anyways expect 7 rwhp from the flowmaster, about 30 from the headers, 10 from the ls6 intake, port the throttle body instead of getting a new one=about 7 rwhp,stay away from an aftermarket maf, lid=10 rwhp and gears=nothing.

[Mr. Luos]

340-350 RWHP.

Which is 35-45 over stock.

Like the others have mentioned....Ditch the Flows. In my opinion, the Magnaflow sounds better and it is a fact it flows better.
Stick with the stock MAF. Aftermarket ones have actually seen power declines, unless tuned for it.

With two mods (SLP Loudmouth, SLP lid) I dyno'd 320/333.
Add SLP 85mm MAF (mistake), SLP LT's (also mistake), LS6 intake I dyno'd 343/358.

[blk_jaws]

I'm not trying to be a smart elek, I just love the sound. On Horsepower TV on Spike TV every car they work on they almost always put a flowmaster on it, so I figured it was pretty good. Any ways I'm not going to be running it at the track, I just want it to be the meanest sounding and performing car in my town. So everyone will think twice before messing with it.

[~redlinels1~]

I'm going to say roughly a 40hp increase. I would highly recommend getting the stock TB ported and to keep the stock MAF. Are you an auto or 6 speed? If you're an auto, I also highly recommend a torque converter. Just my .02

[SeVeReDiStOrTiOn]

cutout

[blk_jaws]

I have a a4

[blk_jaws]

Would I need a tune after headers

[Mr. Luos]

Wouldn't need it.
But you would get the most out of them with a good tune.

[blk_jaws]

who can do a tune for me? And how much would it cost? I havent had one before.

[~redlinels1~]

Three options. You buy a tuning program like HpTuners and a lap top and do it yourself....find a shop that has tuning capabilities for an ls1....or find a person near you that has tuning software and is willing to help you out. Price depends on the shop. The shop thats the closest to me charges $500 for a basic tune, but if I were to do ANYTHING else to my car he would retune the car a mere $100. Just call around to various shops and get some quotes.

[blk_jaws]

I live in a very small town. The only places are like goodyear and a couple of muffler shops. Also would Long Tube Headers make the car any louder?

[~redlinels1~]

You'll probably have to travel a bit for a tune.

Yes...they make the car louder.

[blk_jaws]

Will a muffler shop put on headers for me. Like midas, if they will how long should it take, I dont want to get screwed in the price of labor?

[~redlinels1~]

No harm in asking them. But honestly...the install isnt that bad.

[blk_jaws]

Would I need a new y pipe? If I used pace setter long tubes?

[~redlinels1~]

Yes.

[Kyle C]

I don't have all of the mods listed but my results to date are as follows:
Stock 295 rwhp
SLP Lid, Hooker Catback and TB Bypass + 325 rwhp
Have installed SLP U/D pully and today Supermaxx LTs will post results next week.

[nhraformula]

I have a a4
get a stall converter before anything else.
no other performance add on outside of N20 is a better pick up in performance.

[Ric]

Agreed. go with a 3200-3600 stall, 3.73s(they will actually lose power on a dyno, but the track doesn't lie... you WILL be quicker), and maybe some LCA lowering brackets to help wedge the tires under the car on launch. Also, some SFCs(subframe connectors) will keep the car rigid, helping to hook up better still... it's not just making power that counts, it's getting it to the pavement, too.

Add an underdrive pulley/new belts to your list. Stay away from SLP LTs. And look into a true dual setup if you want the Blowmaster sound AND power... that's why other cars make more power with them... there's TWO of'em. And GM didn't do too shabby on their OEM catback either, so that too is why Chokemaster doesn't help these cars out a whole lot.

Good for probably 360ish to the wheels with a good tune, which should put you in the low 12s should you ever race on a track.

[blk_jaws]

Where can I get a stall converter?

[skywalkrNCSU]

hmmm i wonder why horsepower tv puts flowmaster on everything?????

oh yeah maybe it's because they are their sponsers

ditch the slowmasters and get some true duals if you really want your car to sound good

EDIT:

and do the header install yourself...it wont take much time and you will learn a lot in the process...if you dont have the parts well buy em it will cost less than what a shop will charge to put em on...the best part of building a car is actually working on it not shelling out money to other people to do it for you

[nhraformula]

Where can I get a stall converter?
any of the sponsors here.
i got mine from speed inc
www.ls1speed.com

[delinquent543]

ok, if u want mean, get slp loudmouth (either lm or lmII: II is slightly (slightly) more tame sounding). loudmouth is what u want if u want to piss your neighbors off (combine those with headers and ull piss off ur neighbors 2 cities away..) Some people say it sounds raspy with tons of drone, but there are no two ways around it, its loud... If u want that old school 70's raw horsepower sound, get a set of true duals from texas speed (400 shipped though they dump before the axle), those sound mean and infinatly better than flowmaster (not to mention netting you more hp..) a dyno tune would net you about 20 more hp with those headers..

[Mr. Luos]

I got rid of my loudmouth after I did headers. Sounded like crap.

[01mmmz28]

you will not net 60+ hp on those mods.

Lid----------5-7 hp
LT headers--15-20hp
TB----------7-10hp
maf---------2-5hp
catback(FM)-7-10hp

I did most of the mods you listed, exept I have mac mid lenth header, mac catted y pipe, SLP loudmouth, Zo6 maf, SLP lid, K&N filter, and now my cam. stock dyno was 301 rwhp, after just the bolt-ons I did 349.9rwhp sae corrected. so basically I gained 48 hp. I just dont see 60+ hp out of what you listed. If you like the sound of the blowmaster exhaust, go w/ it, it's your car man, if you want better numbers go w/ a different catback.....Loudmouth, magnaflow, borla, TSP rumbler, hooker,........there are alot to choose from. I have yet to dyno after the cam swap.

[nhraformula]

you will not net 60+ hp on those mods.

Lid----------5-7 hp
LT headers--15-20hp
TB----------7-10hp
maf---------2-5hp
catback(FM)-7-10hp

I did most of the mods you listed, exept I have mac mid lenth header, mac catted y pipe, SLP loudmouth, Zo6 maf, SLP lid, K&N filter, and now my cam. stock dyno was 301 rwhp, after just the bolt-ons I did 349.9rwhp sae corrected. so basically I gained 48 hp. I just dont see 60+ hp out of what you listed. If you like the sound of the blowmaster exhaust, go w/ it, it's your car man, if you want better numbers go w/ a different catback.....Loudmouth, magnaflow, borla, TSP rumbler, hooker,........there are alot to choose from. I have yet to dyno after the cam swap.
with long tubes and a basic tune i gained 30 rwhp. macs and catted y pipe wont gain as much as LTs and ORP.

[delinquent543]

I got rid of my loudmouth after I did headers. Sounded like crap.
define crap?

[Mr. Luos]

There was no depth to it. Raspy as hell.
Sounded fine under 2500 RPM's.
Although I am not sure if it had a lot to do with the cats and the SLP headers. It seemed to have a decent amount of rasp with just an open y-pipe as well.
At this point I have changed everything.

[NE98LS1]

i don't ever seem to hear much about people talking about the K&N induction system on here, which i was looking into getting along with a magnaflow catback. are the K&Ns just not worth the money?

[~redlinels1~]

You wont see many people with the K&N fipk because its expensive. Especially compared to a lid. I picked up an fipk for cheap and have been very happy with it. Just remember not to soak the filter in the oil...otherwise it will harm the MAF.

For the cost of things, a lid is better for your buck.

[nhraformula]

the kn is over rated. a lid will make the same power.

[bww3588]

you will not net 60+ hp on those mods.

Lid----------5-7 hp
LT headers--15-20hp
TB----------7-10hp
maf---------2-5hp
catback(FM)-7-10hp

I did most of the mods you listed, exept I have mac mid lenth header, mac catted y pipe, SLP loudmouth, Zo6 maf, SLP lid, K&N filter, and now my cam. stock dyno was 301 rwhp, after just the bolt-ons I did 349.9rwhp sae corrected. so basically I gained 48 hp. I just dont see 60+ hp out of what you listed. If you like the sound of the blowmaster exhaust, go w/ it, it's your car man, if you want better numbers go w/ a different catback.....Loudmouth, magnaflow, borla, TSP rumbler, hooker,........there are alot to choose from. I have yet to dyno after the cam swap.
thats because you have an '01. 01's have redesigned exhaust manifolds that flow better than 98-00 and your macs dont flow hardly any better than the stock mainfolds. if you did long tubes you would see 60 more hp over stock

[Sarge]

This may be of some value....
http://www.ls1.com/forums/showthread.php?t=7757

[Kyle C]

Got the thing on the Dyno after Supermaxx LT install. Before 325hp/335tq, After 342hp/357tq

[ibanez7]

1. Flowmaster catback will fhoke out the car on future big mods like headers/cam/heads. Flowmaster sound great but unless you also install a cutout, dont bother. About 9-15 hp, depending on other mods
I have hooker headers, cutout and flowmaster, great sound and great flow when I open the dump.


2. Long tube headers SLPs hang low and are not good for lowered cars but you can expect any where from 17 to 30hp depending on other mods.

3. y pipe only get a y-pipe when you install headers.

4. LS6 Intake excellent upgrade 10 to 20hp depending on other mods

5. 80mm Throttle body dont buy, the stock 75mm is good for up to 600hp. Just port your own, and do the bumpstop mod

6. 85mm MAF sensor some people have problems some dont, I bought one and it worked great!

7. Lid SLPs lid works great about 12hp

8. 3.73 gears depends on if you have an A4 or M6, m6 will be a slight notice, A4 you will notice more once you install a stall converter

What kind of horsepower gains am I looking at?

for doing a complete intake and exhaust, if planned right and you buy the right parts, I would say 30hp to 60hp with the matching torque, depending on how your computer responds.

[BIG D's SS]

Well I have a Flowmaster C/B and when I had it dynoed it really hurt me. I need a better free flowing catback. I love the sound but they are only good for about 280 rwhp and we are well over that.

[nhraformula]

define crap?
reminds me of a garbage truck

[blk_jaws]

I accept that flowmaster is not that good in the performance part.

If I had pace setter Long Tube Headers, pace setter y-pipe, and a 80 series Flowmaster muffler how will sound and perform? Keep in mind that I want to keep the Flowmaster no matter what.

[~redlinels1~]

I have that same setup. Personally, I love the way it sounds but of course it doesnt perform as well as other similar setups.

[Hi-Po]

Man.. you will love the sound still with your LT Y pipe and a diff. muffler. its a v8 man, with a good exaust system it will always sound good. and if you plan on any other high horse power mods that Flowmaster is gonna hurt you.

[blk_jaws]

If I go with the pace setter Long Tube Headers and pace setter y-pipe with just a muffler (no catback) what will I need to do about the catalytic converter?

[01mmmz28]

thats because you have an '01. 01's have redesigned exhaust manifolds that flow better than 98-00 and your macs dont flow hardly any better than the stock mainfolds. if you did long tubes you would see 60 more hp over stock

dont even speak, if you dont know what youir talking about. I gained just as much as those w/ LT's, just not as much TQ.

[98ls1blackbird]

If sound is important, you will not be disapaointed with a Hooker cat back system. I have one on a LT1 camaro and the sound is awesome. They flow pretty good too. See ya.
John

[NE98LS1]

I accept that flowmaster is not that good in the performance part.

If I had pace setter Long Tube Headers, pace setter y-pipe, and a 80 series Flowmaster muffler how will sound and perform? Keep in mind that I want to keep the Flowmaster no matter what.

i believe someone above mentioned cut outs, which is exactly what i'm planning on doing with my 80 series. gotta love the flowmaster sound, and when you go the track, cut outs should be better than almost any exhaust system!

[blk_jaws]

I have seen Hedman Hedders around. They make a set for 98-2002 LS1 cars, but I can't seem to find a y pipe to go with it. They sell one to go with the headers but it say's for the catback only. I dont want the catback. Any suggestions

[~redlinels1~]

Custom y-pipe.

[blk_jaws]

can the muffler shop make me one?

[~redlinels1~]

They should be able to. Ask them. :)

[DaddySS]

1. Flowmaster catback 0
2. Long tube headers 15 to 20
3. y pipe 0
4. LS6 Intake 5 to 10
5. 80mm Throttle body 0
6. 85mm MAF sensor 0
7. Lid 5 to 10
8. 3.73 gears 0

My math says 25 to 40. Do not have a muffler shop install your headers unless you know them well. Find a shop that knows these cars or do it yourself.