exhaust opinions
exhaust opinions Im currently running 1 3/4 stepped to 1 7/8 headers with dynomax bullets right off the headers. Would I gain any power swapping to a 3in x or h pipe? Looking for small things to put my 355 in the 6s na. Thanks
TECH Addict
Joined: Feb 2012
Posts: 2,103
Likes: 21
Create a tuned length collector extensions and you may see gains...depending how close your current setup is to a tuned length setup.
I've done this paint test on my 04 GTO with a full y pipe to single 3.5" exhaust. Paint did bubble where it got hot. I then added an H pipe at that location. I have no before/after dyno results to prove if it did anything.
I've done this paint test on my 04 GTO with a full y pipe to single 3.5" exhaust. Paint did bubble where it got hot. I then added an H pipe at that location. I have no before/after dyno results to prove if it did anything.
Last edited by smitty2919; Jan 13, 2015 at 10:48 AM.
Have you tried pulling the bullets off the headers?
In my neighbors 461 olds motor that were only turning 5700 Rpm , it's worth just a hair under a tenth when we take the bullets off versus them on.
Have you looked into a header evacuation kit?
Are you tuning the car yourself?
That tight *** converter ain't helping
In my neighbors 461 olds motor that were only turning 5700 Rpm , it's worth just a hair under a tenth when we take the bullets off versus them on.
Have you looked into a header evacuation kit?
Are you tuning the car yourself?
That tight *** converter ain't helping
Trending Topics
Have you tried pulling the bullets off the headers?
In my neighbors 461 olds motor that were only turning 5700 Rpm , it's worth just a hair under a tenth when we take the bullets off versus them on.
Have you looked into a header evacuation kit?
Are you tuning the car yourself?
That tight *** converter ain't helping
In my neighbors 461 olds motor that were only turning 5700 Rpm , it's worth just a hair under a tenth when we take the bullets off versus them on.
Have you looked into a header evacuation kit?
Are you tuning the car yourself?
That tight *** converter ain't helping
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever
Verdad Gallardo It should pick up no doubt yanking the bullets off... running the evacuation set up will help but very Minimal. Mainly helps with oil control if your for example popping a dipstick out because of excessive crank case pressure . It'll pull a couple inches of vacuum but you got to run open headers for it to be the most efficient.
Your converter is working great. To tight to be na but it's working good with a 1 39 short time. I certainly wouldn't touch it.
Have a few more pounds u can yank out?
To bad you aren't comfortable tuning it. I was going to suggest getting a good oxygenated fuel like ms109 or vp113 . Tuned right over pump gas you'll Ditch them 4/100
Your converter is working great. To tight to be na but it's working good with a 1 39 short time. I certainly wouldn't touch it.
Have a few more pounds u can yank out?
To bad you aren't comfortable tuning it. I was going to suggest getting a good oxygenated fuel like ms109 or vp113 . Tuned right over pump gas you'll Ditch them 4/100
Last edited by BIGsmokey10; Jan 13, 2015 at 05:09 PM.
It should pick up no doubt yanking the bullets off... running the evacuation set up will help but very Minimal. Mainly helps with oil control if your for example popping a dipstick out because of excessive crank case pressure . It'll pull a couple inches of vacuum but you got to run open headers for it to be the most efficient.
Your converter is working great. To tight to be na but it's working good with a 1 39 short time. I certainly wouldn't touch it.
Have a few more pounds u can yank out?
To bad you aren't comfortable tuning it. I was going to suggest getting a good oxygenated fuel like ms109 or vp113 . Tuned right over pump gas you'll Ditch them 4/100
Your converter is working great. To tight to be na but it's working good with a 1 39 short time. I certainly wouldn't touch it.
Have a few more pounds u can yank out?
To bad you aren't comfortable tuning it. I was going to suggest getting a good oxygenated fuel like ms109 or vp113 . Tuned right over pump gas you'll Ditch them 4/100
Mines around a 4400. 8" mechanical diode. It's a FTI snowman. When I ordered it I had it set up for strictly for a 200 to 250 shot. Haven't sprayed it yet but it's been 1.45 60 ' foot , 6.77 na and letting out 80 feet early. leaving off a dead idle and still tuning it. Hoping for high 6.50s when I get it sorted.
Surprisingly the converter Is very tight and has great street manors. I can't wait to spray it.
Don't touch the cam. .. data log it and go from there. Honestly 1.39 is getting down for a 100 shot. The more information you have like how much rpm does the converter drop ? How much and where is the motor making power? The more info you can give em the more they can get that converter spot on... but judging by your short times and et man I wouldn't touch that thing. Get it out more and run it.
Curious what does that thing weigh
Surprisingly the converter Is very tight and has great street manors. I can't wait to spray it.
Don't touch the cam. .. data log it and go from there. Honestly 1.39 is getting down for a 100 shot. The more information you have like how much rpm does the converter drop ? How much and where is the motor making power? The more info you can give em the more they can get that converter spot on... but judging by your short times and et man I wouldn't touch that thing. Get it out more and run it.
Curious what does that thing weigh
Just to add.. your not going to get a converter that works excellent on motor and excellent on spray. There has to be a compromise somewhere. Can have a killer converter on motor thats nice and loose and spray it and blow threw it, or vice versa and have a tight converter that's Killer on spray but is to tight for motor. .. you can get a converter that is " in between" that works ok on both ends but there has to be a give somewhere. That's what I have been told and have came to agree with it
I mean you dropped almost a tenth and a half from a 100 horse... that's killer. . It should really boogy with some bigger jets in that plate
I mean you dropped almost a tenth and a half from a 100 horse... that's killer. . It should really boogy with some bigger jets in that plate
Mines around a 4400. 8" mechanical diode. It's a FTI snowman. When I ordered it I had it set up for strictly for a 200 to 250 shot. Haven't sprayed it yet but it's been 1.45 60 ' foot , 6.77 na and letting out 80 feet early. leaving off a dead idle and still tuning it. Hoping for high 6.50s when I get it sorted.
Surprisingly the converter Is very tight and has great street manors. I can't wait to spray it.
Don't touch the cam. .. data log it and go from there. Honestly 1.39 is getting down for a 100 shot. The more information you have like how much rpm does the converter drop ? How much and where is the motor making power? The more info you can give em the more they can get that converter spot on... but judging by your short times and et man I wouldn't touch that thing. Get it out more and run it.
Curious what does that thing weigh
Surprisingly the converter Is very tight and has great street manors. I can't wait to spray it.
Don't touch the cam. .. data log it and go from there. Honestly 1.39 is getting down for a 100 shot. The more information you have like how much rpm does the converter drop ? How much and where is the motor making power? The more info you can give em the more they can get that converter spot on... but judging by your short times and et man I wouldn't touch that thing. Get it out more and run it.
Curious what does that thing weigh
Just to add.. your not going to get a converter that works excellent on motor and excellent on spray. There has to be a compromise somewhere. Can have a killer converter on motor thats nice and loose and spray it and blow threw it, or vice versa and have a tight converter that's Killer on spray but is to tight for motor. .. you can get a converter that is " in between" that works ok on both ends but there has to be a give somewhere. That's what I have been told and have came to agree with it
I mean you dropped almost a tenth and a half from a 100 horse... that's killer. . It should really boogy with some bigger jets in that plate
I mean you dropped almost a tenth and a half from a 100 horse... that's killer. . It should really boogy with some bigger jets in that plate
Well it should go 6s na with just a tune then. Like I said make a pass with the bullets on and off and check the difference. If you want to spend a little coin bring some oxygenated fuel to thr dyno with you
When it's not -5 out with a foot of snow on the ground lol. Should be early April. My local track lapeer sucks, might go to milan or Norwalk when I spray it.
You got to go to the shootout this year!
You got to go to the shootout this year!
Milan seems like a pretty good track. Ive been there couple times. While I was in ann arbor working. Im goin try like hell to go. The issue is I travel with my job. Summer is the busiest time for me.
Summer has to suck in Georgia for the heat.
Milan is a good track. I like going to Norwalk the most. Tracks killer.
The time I made it out this year was at lapeer. I'm very surprised my car hooked lol. When you oil down they drag a tractor tire across the track to spread it out. No bs.
Think you'll make the shootout this year? I've always watched your car while I was building mine. You'd kick *** in espa and esna
Milan is a good track. I like going to Norwalk the most. Tracks killer.
The time I made it out this year was at lapeer. I'm very surprised my car hooked lol. When you oil down they drag a tractor tire across the track to spread it out. No bs.
Think you'll make the shootout this year? I've always watched your car while I was building mine. You'd kick *** in espa and esna
My local track was like that. They change owners and they new one is getting it back right. Im making plans to go. Going to put in vacation now. That way I can be off. Bowling green only about 4hrs from my house. So hopefully I will see you there.
