over the axle dual...?
Originally Posted by V6 Bird
So just b/c you havent done it with 3", it cant be done? thats all i want to know. 
The only reason this isn't commonplace is the fact that for most people, something like this is simply too expensive for what you get out of it. I have thousands of dollars tied up in my exhaust, and I would say it doesn't perform much (if at all) better than a good y-pipe setup. It is what I wanted though, so I did it.
Originally Posted by EVIL TA
so should i go down to 2 1/2 inch piping then? what do yall think?
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From: England
Originally Posted by V6 Bird
Let me help you put all BS aside..
You CANNOT over exhaust an LS1 even in stock form. It may move power around in the curve alittle but, but the car will pick up ET from it.
You CANNOT over exhaust an LS1 even in stock form. It may move power around in the curve alittle but, but the car will pick up ET from it.
The LS1 still conforms to same law of physics as ever other engine.
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From: England
Originally Posted by V6 Bird
I can custom make an X-pipe that will fit in there...Look up in the Tools for Trade section...I was messing around with my new bandsaw and came up with that. Just look at my username and you'll see the pics n ther.e
But most X setups the X would be right where the t/a bolts onto the floor pan. so the only option is to move the X forward, but there's only so much room due to the header collectors and gearbox.
If you go for a trans mounted t/a then it probably won't be such an issue.
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From: England
Originally Posted by MeentSS02
If you want less of a headache, I'd reduce it down to a 2.5" pipe. Mine is 3" into my X crossover, and reduces to 2.5" directly after that junction. For me, the 2.5" reduction wasn't much of an issue...it was going to have to be reduced at some point due to my CME tips that I refused to get rid of.
Yep I agree, the easiest and IMO the best alternative for duals is 3" from the collectors into 3" Random Technology 7000 Series Metal Matrix CATS, these cats flow better than many mufflers and will not impede flow even on a 500bhp motor (but they must be the 3" ones), then into an X-pipe (Magnaflow make some nice ones), you could either go with a 3" X pipe, but a 2.5" one will be fine and better for clearance and location. Then into some 2.5" chambered mufflers (Powerstick or Stainless Works, these flow more than well enough for well over 500bhp) over the axle and into 3" tips.
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I fabbed up my true duals with 2.5 both over the pass side axle. I had to remove my upper PHB to fit even the dual 2.5's. I didnt notice any issues driving without the PHB for a couple of months BUT when I finally fabbed up my own upper PHB, I certainly noticed the car drove a lot more solidly. I would suggest either going with the BMR relocation kit, or atleast finding a way to clearance the stocker so you can keep it.
I have been trying to sell the back half of my TD setup for ever! Anyone wants these here is the link! They are 2.5 btw with slash cut dual dual chrome tips.
Link! https://ls1tech.com/forums/showthrea...38#post4031438
Link! https://ls1tech.com/forums/showthrea...38#post4031438
Originally Posted by 300bhp/ton
Let me help you...
The LS1 still conforms to same law of physics as ever other engine.
The LS1 still conforms to same law of physics as ever other engine.
Originally Posted by V6 Bird
I dont give two ***** about physics here...Ive proven this with many different build ups of exhaust setups in the last 5 years....They have all made more power....I stock cubed, stock headed 346 went faster with a 1 7/8 primary and 3.5" duals then with a 1 3/4 and a 3" dual setup.
Originally Posted by MeentSS02
Was each car tuned to their max potential (as in NOT effects-based tuning)?
Originally Posted by V6 Bird
didnt have a change on A/F when we did...nothing was changed cept for the headers and duals. this was initial change (first impression)
Bottom line: it isn't really a fair comparison as changing the exhaust needs tuning to maximize the benefits...
Originally Posted by MeentSS02
So was this just an impression, or do you have actual track results? From your former post, it sounded like this was verified by time slips.
Bottom line: it isn't really a fair comparison as changing the exhaust needs tuning to maximize the benefits...
Bottom line: it isn't really a fair comparison as changing the exhaust needs tuning to maximize the benefits...
Means its effectively moving the ehxaust away from the head. Last edited by V6 Bird; Jan 5, 2006 at 11:48 AM.
my setup is Stainless Works lt's, 2.5 inch catted y pipe,( random tech hi flow cats 2.5 inch) SLP 3" d/d factory exaust and you can see my numbers in my sig. This isnt a drag queen so I dont have 1/4 mile numbers but it should hit 11's all day and 10's on the juice. You dont need stepped headers under 500bhp, you should read up on scavenging and and cylinder size and exaust size and length. There have been a few very good posts to explain the physics behind it, bigger is not always better.
Originally Posted by 99blancoSS
my setup is Stainless Works lt's, 2.5 inch catted y pipe,( random tech hi flow cats 2.5 inch) SLP 3" d/d factory exaust and you can see my numbers in my sig. This isnt a drag queen so I dont have 1/4 mile numbers but it should hit 11's all day and 10's on the juice. You dont need stepped headers under 500bhp, you should read up on scavenging and and cylinder size and exaust size and length. There have been a few very good posts to explain the physics behind it, bigger is not always better.
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Joined: Jun 2005
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From: England
Originally Posted by orangeapeel
I have been trying to sell the back half of my TD setup for ever! Anyone wants these here is the link! They are 2.5 btw with slash cut dual dual chrome tips.
Link! https://ls1tech.com/forums/showthrea...38#post4031438
Link! https://ls1tech.com/forums/showthrea...38#post4031438
Just curious what ET's?
Originally Posted by V6 Bird
dyno was only initial results...Timeslips proved the rest for us...Picked up ALOT on the dope. thats all we wanted to see. Tuning them would have skewed our results. Had we tuned then it would skewed the results dramatically and made even more power. We knew something was well when we needed to jet up on the fuel side of the nitrous after the first 2 passes and the car picked up even more.... Means its effectively moving the ehxaust away from the head.
Means its effectively moving the ehxaust away from the head.And the way I see it, tuning might have actually brought the two results closer together.
Either way, I'd personally like to see a dyno overlay to see what effect it had on the power band.
I ran stepped and straight on my car...Stepped picked up...Of course you may be stuck with your noses in the books, so i dont expect you guys to understand real world data....if it were all about books then we would be in a totally different situation and things would be lots different and not work. Bottom line is, Car Craft dynoed the same stuff with the same results...but physics said it wouldnt work...thats what seperates the fast cars from the ones that should be fast. Which category are you in?
What were the results without nitrous? What about your torque what happenend to it? You are a true legend(in your own mind). I havent lost a street race yet, but we dont talk about those things around here. My car isnt a drag queen track times dont really mean squat to me, its how it handles and drives in the real world that I care about. I avg 366 ft lbs of tq (mustang dyno numbers). Thats power on demand without having to be on the bottle. Course I have a bottle just in case its needed, but hasnt been yet. Lets see the overlay, you have a stock bottom end and swapped straight lts for stepped ones, no other changes to the car at all and n/a runs to prove me wrong that would be great to see. Last edited by 99blancoSS; Jan 5, 2006 at 03:56 PM.