what kind of hp gain u guys had with installing longtubes and true duals. Im planning on installing qtp headers with true duals over the axle. Its gonna cost quite a bit for the installation so im trying ot find out what kind of gains would i see. THe install includes a dyno tune and dynatech cats

 

i'd say 25-30 rwhp

 

LT's, duals and a tune I would imagine 30rwhp sounds about right. You may want to just consider installing the headers yourself and save some cash.

 

I gained 21 rwhp with my headers, 33rwhp with my headers/y-pipe/catback and no tune.

 

Are these gains coming over stock, or from a catback, or what?

 

Was this before your stroker? If so, that is strong, a True Dual setup and some long tubes netting 35 with a tune sounds right to me. Best part is, mods build on each other. I would love to see someone install a cam, fast 90/90, dyno, then add long tubes and true duals.

 

i gained 30 rwhp with a basic tune.

 

I gained 32rwhp

 

I don't have any numbers but i was wondering the HP gains myself cause i installed some along with everything else so i won't notice a difference from the headers alone.

Also yeah you should install them yourself it's pretty easy. Easier then i expected as long as you jack the car up enough they should slip right in through the bottom like mine did. Driver side will go in from the top and the passenger side has to go in through the bottom atleast this is what i figure out. But if it's jacked up they both go in from the bottom really easily. Mine are pacesetter too.....

 

I see headers in my future.

I already have a hypertech so the tunning part is covered.

 

The crappy Hypertech "tune" isn't what you'll want. I never felt any gains from mine, and I'm sure the "tune" it is capable of is very basic. You'll need your timing advanced a little and the car leaned out a little as well. Hypertech also doesn't delete codes, and you'll need to delete the ones that'll pop up from the install.

 

LTs will need to come in from the bottom. Stand the collector on the ground and the height of the header is how much you will need to jack the car up to get it in.

 

No lol if that were true i woulda had to have jacked the car up 3 feet in the air. You need about 19", the passanger header if stood up on the collector comes to my waist or so.

 

With my Vinci tuner i didnt have any codes after my pacesetter install. I just figured on advancing the timing 10 degrees to compensate for it running richer after headers.

 

25-35 with tune

 

You can expect around 25-30 rwhp, maybe a bit more with a tune.

 

you meant 10%, which will be about 3* over whatever is in the timing table now. 10* is alot.

 

ah, i thought that 10 degrees sounded like a lot. 10% sounds more like it.

 

25 +/-

 

LTs, TDs (with cats!), LS6 intake + tune = 35HP for me.