and what kind of material (if this makes a big difference) thanks ok maybe
some of you guys can help me out, I've been looking to buy some headers,
x-pipes, and an exaust system. I was wondering how they would effect my
car (90 gt 5.0). I havn't had a lot of time to research with work and all,
but I was thinking It would increase hp and increase airflow. Perhaps gain
in fuel economy without working it out. But my main concern is will it
hurt the performance by losing torque, would it take off slower or not pick
up as well.
What kind of brands do you recommend
How would less back pressure casue a loss of torque I think it would even out yoru torque cruve slighltly give more power acorss the board.
oh, I didn't know what would happen to the torque (still in the learning process) at all, so this was a concern of mine. I tried reading up on it, but the torque and hp curve chart is still a little confusing to me and I still don't know quite how to read it......it shows the hp at that rpm and where they cross you get xxhp at yyrpms? Sorry if that didn't make sense, but hard to explain something you don't understand
Yeah I don't know much about much but any increase in engine
better airflow etc. will give better torque results not worse so don't worry bout it my friend. Im sure your local shop could explain it to you thats where i go when i have questions
Cats or no cats? I would recommend some kinda of ceramic coated long tube
Mac Headers, with either a Mac prochamber or bbk or Bassani X pipe with no
cats, with an american thunder exhaust system from summitracing.com. Thats
what I'm doing anyway, if nothing else dont go with shorty headers, long
tube are better. Ceramic coated cost more but they won't rust.
Headers- 350$ or so
Catless X-pipe- 180-200$ or so
American thunder exhaust- 250$
Sound of a 5.0 with a nice full exhaust- PRICELESS :thumbs:
I'll answer your question right now with a little bit of what I was
thinking. I was just looking at headers, but I was thinking of using
shorty headers. I didn't know a good brand so you gave me a good place to
look thanks. I was thinking of using a cats with x pipes. Also I just got
done looking at the american thunder exhaust and I was going to go with
I'll have to read the advantages with and without the kitty.
Back pressure is a myth.
How exhaust really works is through velocity and volume. At low speeds, exhaust gets out quick by squeezing its way out really fast. This is why smaller exhausts are good in the low end. When theyre too big, the exhaust moves slower because it bounces around in the exhaust. However, at higher speeds more exhaust is made so it needs to be bigger to get out.
Blow through causes a drop in VE, thus a drop in BMEP. Torque and BMEP go
hand in hand. At low revs the engine is already suffering low VE (the
throttle plate sees to that). This is why exhausts should be designed to
suit cam events and valve events and why large exhausts are detrimental to
fuel economy and torque at low revs.
Having said that a 5.0l, has plenty of torque for a medium car so performance drop may be hardly perceptable until you attach a stump and try to pull it out of the ground.
Don't go with longtubbes. I would trust both Mac and BBK, I would go with BBK first though, my ca is automatic and their headers don't clear my tranny though. Without the cats you won't go through emissions but you will have better sound and flow, I just have my mechanic write me through emissions with a waiver that says he did such and such work and it still won't go through.
ok heres what I'm thinking of, tell me what you think...
exhaust (http://store.summitracing.com/partdetail.asp?autofilter=1&part=FLO%2D17116 &N=115&autoview=sku)
X-pipe (http://store.summitracing.com/partdetail.asp?autofilter=1&part=BBK%2D1662& N=115&autoview=sku)
I was thinking of the full length headers, but the x-pipe says it fits the shorty headers and says nothing on the full length. So I don't want to get the full length and have it not fit
shorty headers (http://store.summitracing.com/partdetail.asp?autofilter=1&part=BBK%2D1515& N=115&autoview=sku)
Full length headers (http://store.summitracing.com/partdetail.asp?autofilter=1&part=BBK%2D1516& N=115&autoview=sku)
Also has anyone bought any parts from online, how much is shipping and handling and is there any product damage. Or do things run smoothly, thanks for all your help guys.
Shorties are a waste, call summitracing and ask a representative, whenever I had any questions about any of their products, they could tell me by me just calling their 1-800 number- don't be afraid to use the phone and ask, you will thank me later down the road.:thumbs: