Thread: New Mufflers?

and the after TS which i think you have seen already.. but any way FOR SCIENCE

Everything's raspy after headers. I liked my magnaflows until I got headers.





Both vids are before headers. Both don't sound like a v8, both fail

All 3800 exhaust phails like a dead fish

^^ this!

yep thats the video i posted before^ can you make a video of yours? id like to hear it with just a different camera.

Originally Posted by bluegtp91

Brandon, you dummy.

Anything 3800 without a resonator sounds like dog squirts unless it has a turblow.

Again, I liked the sound of the drag mufflers.
But yah, I'd probaby stick with stock mufflers just because it's never gonna sound the way we want it to. That's the consensus. lol.

thanks for the reply's guys! i just picked up a 3800 block im going to be rebuilding so i still have alot of time before i get into mufflers. i didn't plan on buying this block and going this far with my car but it happened. i really would like to make my car sound like this one but im not gonna have enough money for the supporting mods to run the intense stage 4 cam like i really want to.

I hope by rebuilding you dont mean rebuilding the bottom end, cuz das bad. replacing all the gaskets and stuff its good. While you have the heads off take them to an auto shop and see how much it would be to port them, or at least get a valve job and see if you can get them machined for clearance for a cam bigger than an XP.

when it comes time again that you are looking for mufflers, see if u can find a used borla catback for sale...you could probly negotiate a price that will be around the same that it will cost you for the new borla mufflers and tips, and the work of getting them on if you are not doing it yourself. i recently bought a used corsa catback for $425 which definitely aint bad when it costs $1200 brand new haha.

Originally Posted by JoRoW99

I hope by rebuilding you dont mean rebuilding the bottom end, cuz das bad. replacing all the gaskets and stuff its good. While you have the heads off take them to an auto shop and see how much it would be to port them, or at least get a valve job and see if you can get them machined for clearance for a cam bigger than an XP.

i am rebuilding the bottom end i work in an auto shop a Mustang shop and we have rebuilt many engines before, and i have a friend that has already completely rebuild 3 other 3800's and never had a problem. i also know someone who works in a local machine shop so im running the block over to him and he's gonna check the block for cracks. my friend also has a valve lathe at his shop so we are going to do the valves there and hone out the cylinders. im gonna get the heads ported im gonna find some info on that and maybe do it myself, it not im gonna take it to the machine shop. i dont know why all these other peoples engines blew up from rebuilds, it just doesn't make sense to me they had to skip out on something. if an engine is built correctly its not gonna just "blow up"

I have read otherwise eddie. Good luck though.

what did you read? and thanks. if my engine blows you can all say "i told you so"

Originally Posted by JoRoW99

I hope by rebuilding you dont mean rebuilding the bottom end, cuz das bad. replacing all the gaskets and stuff its good. While you have the heads off take them to an auto shop and see how much it would be to port them, or at least get a valve job and see if you can get them machined for clearance for a cam bigger than an XP.

Stock guides are clearanced for .550. The XP isn't that big, it's around .520 lift.

Also, why not build a 3800? Reptile's and my last motors were all assembled from scratch. They ran like champs. And not for 500 miles like most of them are...he had over 20k on his when we went to a low compression E85 setup and I demodded at nearly 19k. They only fail if the builder fails at not paying attention.

Originally Posted by matt5112

stock guides with LSx retainers for 515?

stock valvetrain minus springs/retainers.

factory springs are the weak point...c'man brah.

Originally Posted by matt5112

So how does the max clearance between the valve seal and the spring retainer change with a different cam?

It doesn't?

I'm just saying I wouldn't run stock springs that are probably a solid 60lb's after 100k miles...yay; valve float.