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Old 03-14-2011, 02:41 PM
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Default upset about header install

i would be lying if i said i was happy with my longtube header install, i just put on new ceramic coated flowtech headers with ORY, first of all the whole install was a pain in the ***, i installed new poly motor mounts,stage 8 locking bolts, new plugs,wires ect. the driver side motor mount went back in no problem, the passanger side fought me for over 3 hours but finally got it, then came the header bolt closest to the firewall on the passanger side, after 2 hours i got that 1 to go in, after it was all said and done it took 16 hours to install and start up finally, the headers sound great, the throttle response is unbelievable, so i take my car to the track thinking i had to have gained a good 2-3 tenths, the best i could get my car to do was 9 hundreths faster, not even a whole tenth, ARE YOU FU**ING KIDDING ME!! all that for not even a tenth i gained more with my damn lid and air filter swap, the only thing i can think of is i had my pcu tuned by frost about 3 months ago, i told him the tune would be for longtube headers and ory, but i wasn't able to put the headers on till last week, would having my computer retuned now pick me up anymore time in the 1/4 mile?
Old 03-14-2011, 03:05 PM
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Long tubes should be worth a few tenths in the 1/4 so there must be something wrong. Maybe the DA was high at the track that day ?

Also, a dyno tune would help a ton.
Old 03-14-2011, 03:21 PM
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Don't look at your ET, look at your trap speed. When I did my header/ ls6 intake install I ran 114mph compared to 111mph, but still pulled a 13.2. It's because of the added power I was spinning more off the line. What are your compared trap times?
Old 03-14-2011, 03:32 PM
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Welcome to the world of dragracing and modding cars. Not every mod results in gains at the track the first time out. Without a tune looking at wideband O2 readings, you could be lean or rich throughout the run and leaving e.t. on the table.

Last edited by The Alchemist; 03-14-2011 at 04:59 PM.
Old 03-14-2011, 04:23 PM
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I bet you aren't more upset then me....at least you installed yours.
https://ls1tech.com/forums/generatio...gine-help.html
Old 03-14-2011, 06:48 PM
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This ain't the place to be crying about doing work on your car. Everyone goes through it, especially the people on tech. hahaha
Old 03-14-2011, 07:56 PM
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ok i guess i'm crying now, yeah i'll have to get it hooked up to a wideband to see what's going on, i'm thinking after the computer got tuned i hooked it up and drove it for a while and it learned how to tune itself to the stock manifolds and cats, does this sound correct?
Old 03-14-2011, 10:10 PM
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What was the weather on each run?

40* and overcast would net different results from 90*, sunny and humid.
Old 03-15-2011, 12:40 AM
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If you want to go fast you have to expect blood sweat and tears sometimes. I live in California and every two years for smog I have to pull my entire exhaust which includes dropping the rear end completely out, replacing the headers, changing the intake...... and then driving it down the street to get the smog and then do it all over again to put the go fast parts backs on. The fastest and simplest thing you can do to pick up time at the track is a set of wider and taller than stock drag radials, high stall converter, rear end gears and remove weight off your car(free). You also don't have a sig with your mods are you m6 or auto? If your m6 and do not have slicks or drag radials adding power with no traction already will not let you go faster.
Old 03-15-2011, 10:26 AM
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Originally Posted by TheBlueKnight
Don't look at your ET, look at your trap speed. When I did my header/ ls6 intake install I ran 114mph compared to 111mph, but still pulled a 13.2. It's because of the added power I was spinning more off the line. What are your compared trap times?
You are right; I'm kind of surprised that it has to be said.

ET is subjective; what did the car MPH before and after the mods?
Old 03-15-2011, 05:33 PM
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car is an automatic with 3.42 gears, yank ss3600 stall, it was tuned by frost about 3 months ago, slp lid, high flow filter, 160 thermostat, ported throttlebody, coolant line bypass, pa racing adjustable lca's,s&m adjustable panhard bar, car ran a 12.01 @113.76 with a 1.72 60' time, after putting on an edelbrock non adjustable torque arm, flowtech LT headers,ory,ngk tr55 plugs,new plug wires, poly motor mounts, my best time being 11.91 @ 114.32 with a 1.66 60' time, should i get the computer retuned?

Last edited by shepss217; 03-15-2011 at 08:39 PM.
Old 03-15-2011, 05:55 PM
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You should be proud to hit 11's without a cam your car is doing good.
Old 03-15-2011, 06:20 PM
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Originally Posted by shepss217
car is an automatic with 3.42 gears, yank ss3600 stall, it was tuned by frost about 3 months ago, slp lid, high flow filter, 160 thermostat, ported throttlebody, coolant line bypass. car ran a 12.01 @113.76 with a 1.72 60' time, after putting on flowtech LT headers,ory,ngk tr55 plugs,new plug wires, poly motor mounts, my best time being 11.91 @ 114.32 with a 1.66 60' time, should i get the computer retuned?
What the hell are you complaining about man.. The best I could muster with just bolt-ons was a 12.7@107mph with a 1.7X 60ft. Also you have to remember. The faster you go the more power it takes to get there.

You have a strong runner and it sounds like Frost did a hell of a job tunning it for you.. Stop crying and enjoy the ride..
Old 03-15-2011, 06:34 PM
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Holy ****...you're running 11's with bolt ons? Hell, I counted at least 3 that shouldnt have even really given you any real gains. Looks like you got a Tuesday motor...congrats!
Old 03-15-2011, 08:41 PM
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yeah tru, i hear that from alot of people that the car does run strong, i'm just wondering why i only gained so little from what was supposed to be such a big mod
Old 03-15-2011, 08:52 PM
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Heck I got cam, long tubes, LS6 intake, throttle body, 3000 stall, 373 gears and exhaust and I ain't broke out the high twelves yet. Quit b#!&in and go register for the guinnes book of records or somethin cause your car is screamin for what you have lol
Old 03-15-2011, 09:18 PM
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I run 12.05 but with no tune but my gearing and stall are a lot more extreme than yours. You have a 11 second car that you can drive every day be happy.
Old 03-15-2011, 11:59 PM
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Originally Posted by shepss217
yeah tru, i hear that from alot of people that the car does run strong, i'm just wondering why i only gained so little from what was supposed to be such a big mod
It does seem a shade light.... what was the DA on those days? Was your best before the mods on a 40deg F day?

Do you have any friends with a wideband or nearby dyno that you can get a log with AFR?
Old 03-16-2011, 12:15 AM
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my 60 times are better than yours but you should be close to what is expected out of your setup. Take some weight off with a good cam and you could probably run in the 10's if you did 11's with your current setup.
Old 03-16-2011, 12:17 AM
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85lb girlfriend driver cheapest 125 lbs I could ever save.



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