I learned. I learned that flow of the exhaust makes the horse power. Now answer this for me. how do you increase the flow volocity without creating back pressure. The bigger you make the pipe the slower the air will flow through it. The smaller you make the pipe the faster the air will flow through it. Right? So you have to find a balance between the two. And if the more volocity you create, the smaller the pipe this means with no pressure you would have a very slow exhaust volocity. So then dont the two run hand in hand? And this is why i put the two in reference to one anouther. well that and I was hoping it would iritate you

And we are getting somewhere on the power out-put difference it had to be the intake. So the exhaust i have on there was getting a low flow volocity and after making a new intake I increased the flow. So if you plan on keeping your stock intake system a 2.5 is a no go on a horse power inprovment. Can we agree? If not we can continue to argue? this is rather Entertaining. And im learning alot.

yes, it is a tradeoff between velocity and backpressure. this is, of course in a perfect world. the 3rd factor is cost, and most oem manufacturers go with the cheapest they can that still works. this doesn't apply with aftermarket parts mfg's (to a point) tho.

an engine can only flow as much as the smallest/most restrictive point in its airflow path, simple as that.

Yes, and the intake is 3" at the start and 2.5" at the TB. Only issue with the stock intake is PRIOR to the air box.

Who cares though, NAs are slow as hell anyways.

Have you even gotten to drive your creation as a turbo yet?

No, but I've driven turbo Zs, and other turbo cars.

Iv never driven a turbo Z before... But maybe mine will magically turn into one before Branson.

For sure but i still have fun in the turns. And the stock intake has flex connectors and rolled lips that restrict the inside diameter. Also this post is no longer on topic.

i think you should all read "Maximum Boost" by Corky Bell. i believe is the author's name.( not sure i spelled it right)... find it, buy it, read it. will answer your questions.
back pressure on n/a = not always bad
back pressure on turbo = not good

sorry to dig up older thread

backpressure is always bad, we've been through this before.

search 'backpressure' and you'll see why.

i have many times. I've read lots of books on exhaust systems and the pros and cons of back pressure. to a certain extent it is not bad. that's my findings. just try and find the book. it is the "bible" ,so to speak. there is another good book to. i have to ask a friend for the name but i will post when found.

backpressure is bad, backpressure is always bad.

exhaust velocity is good, backpressure is an undesireable byproduct of keeping exhaust velocity up.

as it has been stated before back pressure does help torque in the lower rpm range. yes it is bad for turbo cars because the turbo creates back pressure. on n/a engines it is nice to have a very small amount. either way "Maximum Boost" is a must have for anyone.

We know Maximum Boost, we've all read it. If you're getting backpressure is good from that book, you misunderstood. Back pressure is bad in ALL cases, FLOW is good.

NO


BACKPRESSURE IS ALWAYS BAD

All the links to maximum boost in our "handy links" section no longer work. but i was smart enough to download it before it got removed.