mjs1012

iTrader: (36)

I've been thinking about doing heads on my cam only car and was curious if adding a fast and bigger headers would be worth the money. I currently have an ls6 intake and ported tb with BBK long tubes and was wondering how much hp I'd be leaving on the table if I didn't change them.

ULTIMATEORANGESS

iTrader: (4)

id get a FAST and NWTB OVER bigger LTs which gains would be minimal and save for a tune.

z28adiction

iTrader: (1)

I'm actually doing just what u said lol. My car is currently a vindicator cam zo6 cnc 243 head car with 11:6:1 comp. I just sold my buddy my ls6 and pacetters 1 3/4 headers bc I picked up a fast 92/92 setup and a set of kooks 1 3/4 stepped to 1/78 headers. I'm currently making my own v banded y pipe. From people I've talked to with experience with similar setups to mine picked up 15-20 hp going from pacetters to kooks. The fast night be another 10-15. So your looking at decent gains. Your bbk headers are known to not be the greatest out there so you might pick up more. Ball flange headers suck for flow. But we will see next season the diff it makes on my car. And for the record I only switched bc I got killer deals on the fast and kooks headers. But as in any build the diff in each setup will account for diff gains. Higher comp is the best bang for the buck and will allow you to run a larger header without losing as much tq. My car has been a total budget build and runs with cars with way more money in them.

BrntWS6

iTrader: (7)

I personally gained 20rwhp from each on my H/C car. Both were on the same dyno.

HCI2000SS

iTrader: (2)

Since you already have a nice pair of long tube headers I'd just keep them and do the fast intake. What heads and cam are you going with?

DaSkinnyGuy

I can't find the thread about this, a member here had a car with heads and cam with 1 3/4" Kooks headers, He felt that the car had more potential he swapped to kooks 1 7/8" and gained about 15hp. The dyno showed no loss of power from any low rpm ( which is a huge myth that I come across with LS1's ). On top of that You want to switch to a fast 92 without a doubt your going to gain from switching that also. If you switch both fast 92m and 1 7/8" Long tube headers at min 20hp. My opinion I would do both, Because I want every hp possible out of the engine to get that victory.

BrokeSolid

I've been really debating this myself. I have a heads and cam car with some old 1 3/4 hookers and a LS6 intake. I really don't think this stuff is worth the money, but I'm going to redo the exhaust(don't like dumps) and would like to do a tune and be done all at once. It's just tough to justify the expense for the gain.

mjs1012

iTrader: (36)

I already have the streetsweeper ht and I'm trying to figure out what heads to go with. Would the 2.5" y pipe I have with the bbks become a restriction compared to a 3"?

mjs1012

iTrader: (36)

This is kind of my thought as well. I know the fast will compliment everything well but is the 15 hp gain worth the $1000 for the intake and throttle body.

mac62989

iTrader: (1)

Mark get some ported heads first then worry about the other ****

HCI2000SS

iTrader: (2)

Oh ok i thought you had a 3" y-pipe already. With a good HCI setup a 3" would definitely help imo. Make sure that y-pipe has a good merge as well

mjs1012

iTrader: (36)

Thats the plan right now, but I'm undecided what route to take as far as heads. All depends on what Im willing to spend.

The y-pipe does have a good merge and I have a good flowing catback, but Im pretty sure its only a 2.5". The car put down good power (before I put in a new rear) when I dynoed it so Im not sure how much of a restriction it would become with heads.

mac62989

iTrader: (1)

I plan on AI's HCR 241's, they make awesome power and are cost effective. I dont think you can go wrong with a nice set of ported stockers whether it be 806, 241, or 243s.

BrntWS6

iTrader: (7)

That was me. I went from Kooks to Kooks and gained 20rwhp 15rwtq from just headers. Then another 20rwhp from a ported FAST 92 setup. I went from 420 to 461rwhp on the same dyno. I already had H/C with true duals.


Here is the thread https://ls1tech.com/forums/dynamomet...yno-sheet.html

Rise of the Phoenix

iTrader: (27)

That's a lot of HP you picked up with those mods. Great back to back testing too.

99Bluz28

iTrader: (35)

The 2.5"pipes on the BBK Y-pipe are good to about 500 flywheel hp, so it's not your first restriction. The first restriction is the 3" single outlet, and all on back. A single 3" pipe is only good to about 370 flywheel hp before it starts becoming a restriction. I'd put your money towards a set of heads first, then a set of 1-7/8" headers with the companion Y-pipe with at least a 3.5" or larger exit, and finally the FAST 92 intake manifold.

DaSkinnyGuy

Yes its you I was talking about, my memory was off by about 5hp, at least i underrated my memory.

MikeWS6

The Fast 92 should gain 10hp. The headers depend on the rest of your setup.

Rise of the Phoenix

iTrader: (27)

I see him gaining more than 10 with the FAST setup.

mjs1012

iTrader: (36)

I would hope its more than 10hp for a fast. Another dilema Ive been thinking about is that if I went all out and did good ported heads and intake/bigger headers, thats easy $3k after its all said and done. I could do a procharger for a grand more if I bought an ebay front mount with piping and pieced a kit together.