Hello i want some suggestions from you guys who has seen moore of this cars then i ever can dream about .. i live in sweden and got 2 x 89 GTA firebirds

in both cars i shall swap engines and encresse cu/in .. to one of them i have bought the 454 smallblock engine from www.theengineshop.com and that ones shall be able to give 610 Hk , the other one is yust a 383 but heyyy it´s my wifes car

on both engines i´m gonna use HOK 2210 headders and after them 2 x 3# catalytic converters (cant get thru emissions here in sweden otherwise )

THEN the main problem comes ... the exhause ... its a werry tuf job to get a pipe ower the rearaxel on the drivers side so i am thinking about using some kind of homebuild sidpipe sollution

the end of the pipe shoud aim out before the rear wheels on both sides ¨
i´m thinking about using a straigt pipe from each cat and maybe an muffler with in and out on the same side so i can let the straight pipe go right in to the muffler and then on the other pipe of the muffler (out) frontwords and then a sharp turn back again and out in the wheelhouse


OR

yust after the cat , an inline muffler and after a bended pipe out in the rear wheelhouse

but i dont wanna get it to loud (thats me *LOL*),, it want pass the emmissions test

the height is also a main problem ,, the muffler needs to be thick but still let the gases pass thru good ( and reduce noice ) it´s alitlle like eating the cake and still have it left i know bot someone must have been trying this already so i am looking for some advice here and even what part that shoud do the job

Best regards Åke of sweden

 

I put some on my 82 TA. I got them from summitracing.com There not too loud. I have them functional. go to the site at the bottom to hear them. Tell me what you think!

 

i like it ,but they need to be longer ,or more towards the front more
just my opinion

 

I would have gotten longer and moved more towards the front but it too hard to postion the pipes like that. there is verry little room down there as is and the ground clearance sucks.

 

it looks okay buy i cant use sidepipes "thatway" . on those gta`s u will melt the plastic with the heat . . i´t thinking about "internal" sidepipes i.a that the only part that shows is the rear end pipe in front of the wheel ... i can propebly not use your kind of sidepipes anyway ,,, those headders im using isa full lenght type and after the headder the catalytyc converter sits so it´s propebly on the middle of the door where u first can ad a muffler ,, i want my sidepipes under the body and still have some kind of ground clearence ;-) dont say it cant be done ,, this aint a car , it´s a bird an do birds fly ;-) my cars are supuse to be raw sleeapers

 

Check out https://www.thirdgen.org/forums/exha...st-plenty.html He did what you are thinking of.

 

that setup is BA...

 

the 2460's are a shorty header. i think you may be thinking of the 2210's, which are 1 3/4" primary tubed longtubes and much better matched to your combo than the tiny 1 5/8" shorties. but that 454 will want to breath even more than that. i would think that a set of lemon customs would be about right.

 

Yepp something like that but i also need some mufflers ... and yepp i know tht the 454 shoud need moore open exhause , but a aint gonna go racing with it . yust show some ricers of the whole adiea is to build a descrete sleeper and this adiea about this kind of exhause is grown up from the almoust imposible mission to get doubble 3# pipes ower the panhard rod

that guy who build this setup has got the right knowledge ,, a pipe dosent need to be round . it works as well in other forms it+s yust the size that matters ( Hmmm where have i ever heard that before )
so what muffler are thick egnuff to use to this . they must accept 3 # pipes

 

not side pipes, but side exit

https://www.thirdgen.org/forums/atta...559dcc57f6.jpg

 

yes that would be the rigth way to describe it

 

When you install the 454 and 383 you are going to have a hard time passing emissions....

 

no that isent a problem ... the outside of the engines are the same and the emmisions arent a problem

here in sweden we got a fuel called E85 (etanol) and we are not alow´d to use it in ouer regular gas cars but no one can tell the diffrens ,, on the 454 i have a holley 950 commander system and i also got a 4gas meter .. in sweden the emmissionstests are like this :
on idle we are alowed to have 0,5 % CO and 100 ppm HC and then they messure on higher rpms ( between 2000-3000) in that range we are alowed to hace 0,3 % CO and 100 ppm HC and then they messure the lamdavalue .. that lamdavalue is a matematic configuration between al four messurd values on the meter ,, if the car is optimal u get 1.000 lambda

the problems with E-85 is that it leavs lots of air left in the burningprocess so that value ( O = Oxygen) is higher then it shoud be with regular gas

but then u got this nice things on this cars ... A.I.R system ,, that pumps in fresch air in the exhausesystem ,, the emisiontest stations are aware of this and you get a dispance on the LAMBDAvalue that ist the tuffest part to get inbetween the accepted numbers ...

so the emmission test isent a problem

btw by using E-85 u burn lot´s cleaner then with petrol so u can pass the emmisions by adding it into the petrol ,, the the funniest part by using E-85 its that it rated 104 oktan ,, u have to add 25-30 % moore fuel then with petrol but with that high oktan u cant hardly get your igition too high ,, higher ignition = moore power .. the biggest winners on this E-85 are supercjharged cars ( blower or turbo) the E-85 need moore combustion to get back the loss in power comperd to gasoline
but when u get that higher combustion u get moore power then with gasoline ,, u cant run a gas engine with that high timing

the E-85 fuel is sadly one part of the future when this dinooil stops pumping up from the ground

well back to topic ,, anyone who has build a system like that with loong tube headders ?