Low dyno numbers??? Am i wrong?
10-23-2009, 06:50 PM
#21
i am just saying that the muffler is not his problem. those pointing to the muffler are comparing his small cammed ls1 to a built 427 haha.
10-23-2009, 08:49 PM
#22
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2 tracks. one in mid indiana in the late evening. other was in michigan outside detroit. during a 90 degree day. not the best conditions. and all on street tires with an unlocked tranny.
these stock guys are saying 13.0s with nothing else. that blows.
and no there isnt anything i havnt checked. tb is open all the way. no ses code or anything in the computer. car runs tip top. and why would i be trapping 115? i now have 410s and dont think i could even trap that speed. im so confused. you guys say the flowmaster, bad tune, to many miles. the car runs strong and alot of guys with built ls cars around here think it runs strong. where are these 13.0 stock cars commin from and why did i do all this work just to get to stock speeds? i studied before i put these things together but i do think a new true dual exhaust setup will help. but idk. i still curious?
these stock guys are saying 13.0s with nothing else. that blows.
and no there isnt anything i havnt checked. tb is open all the way. no ses code or anything in the computer. car runs tip top. and why would i be trapping 115? i now have 410s and dont think i could even trap that speed. im so confused. you guys say the flowmaster, bad tune, to many miles. the car runs strong and alot of guys with built ls cars around here think it runs strong. where are these 13.0 stock cars commin from and why did i do all this work just to get to stock speeds? i studied before i put these things together but i do think a new true dual exhaust setup will help. but idk. i still curious?
10-23-2009, 09:05 PM
#23
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You don't need a true dual exhaust... Just a good quality cat-back or just a cutout. They are not exaggerating about the Flow-disaster; the cross-flow Flowmasters are horrible on these cars. I have seen 40-80 HP gains by cutting that muffler off or running a cutout. No BS.
Shane
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10-23-2009, 09:25 PM
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he has a cammed car with supporting bolt-ons, why wouldn't he be going 115? also, my 3600lb bolton a4 car trapped 110-111, it was NOT a "strong car" nor was it in a DA below 2000'...ever. it went 14.1 @ 101 bone stock, about 25 passes worth with the paper tags still on it. the ta i am speaking of is a 6 spd, but that doesn't extinguish the fact his car is missing something. that car raced on the same track in the same circumstances as my a4. i don't think it's a stong car by any means.
i am just saying that the muffler is not his problem. those pointing to the muffler are comparing his small cammed ls1 to a built 427 haha.
i am just saying that the muffler is not his problem. those pointing to the muffler are comparing his small cammed ls1 to a built 427 haha.
It only made 299 rwhp too
10-23-2009, 09:33 PM
#25
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The muffler is surely the majority of his problem. I promise you, you will LOSE HP on a stock LS1 car with that muffler over the stock GM muffler. We learned this way back in 98-99 when these first came out. That muffler could be killing 4-5mph easily in his setup. A cammed car will lose a minimum of 30 hp with a Flowmaster crossflow muffler. I've got many dyno runs to prove it.
Shane
Shane
10-23-2009, 11:41 PM
#26
2 tracks. one in mid indiana in the late evening. other was in michigan outside detroit. during a 90 degree day. not the best conditions. and all on street tires with an unlocked tranny.
these stock guys are saying 13.0s with nothing else. that blows.
and no there isnt anything i havnt checked. tb is open all the way. no ses code or anything in the computer. car runs tip top. and why would i be trapping 115? i now have 410s and dont think i could even trap that speed. im so confused. you guys say the flowmaster, bad tune, to many miles. the car runs strong and alot of guys with built ls cars around here think it runs strong. where are these 13.0 stock cars commin from and why did i do all this work just to get to stock speeds? i studied before i put these things together but i do think a new true dual exhaust setup will help. but idk. i still curious?
these stock guys are saying 13.0s with nothing else. that blows.
and no there isnt anything i havnt checked. tb is open all the way. no ses code or anything in the computer. car runs tip top. and why would i be trapping 115? i now have 410s and dont think i could even trap that speed. im so confused. you guys say the flowmaster, bad tune, to many miles. the car runs strong and alot of guys with built ls cars around here think it runs strong. where are these 13.0 stock cars commin from and why did i do all this work just to get to stock speeds? i studied before i put these things together but i do think a new true dual exhaust setup will help. but idk. i still curious?
My car trapping 117mph in a 2000 DA.. I would consider my car, along with many others, a strong running full weight car. I have a baby 226 cam and ported/milled 317s 4000 converter ls6 intake LTs ORY cutout blah blah blah.. 7.43@91.5mph 1.53 '60 passes on average.. Full weight, driven to the track yada yada yada..
Looking at your 60 ft. you definitely have more in your car, I cut 1.9s stock and the Gf does also.
Adding a cutout and tires I could see mid mid 12s@111mph maybe.. But look at what other a4 cars are doing mph wise with that ET..
By the way, did I miss what kind of converter you are running?
10-24-2009, 09:26 AM
#27
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lemons12.
converter is stock. its my dd. im not as worried about the numbers since i can pull on a 6.0 all day long and ive ran another cammed 99 m6 car and he didnt fair as well either. now that was with my stock tires. i now have 4.10s and dr's. so that being said you think its a mid 12 car with no flowmaster and dr's and gears? i would like to do a conveter about a 3600 or bigger and im seeing .5 of a gain on a4 cars with conveter only. it is still a full weight car.
but should i be seeing higher numbers when i put it back on the dyno with my new better flowing and alot better set up exhaust. i think my y pipe is probly hurting me also.
converter is stock. its my dd. im not as worried about the numbers since i can pull on a 6.0 all day long and ive ran another cammed 99 m6 car and he didnt fair as well either. now that was with my stock tires. i now have 4.10s and dr's. so that being said you think its a mid 12 car with no flowmaster and dr's and gears? i would like to do a conveter about a 3600 or bigger and im seeing .5 of a gain on a4 cars with conveter only. it is still a full weight car.
but should i be seeing higher numbers when i put it back on the dyno with my new better flowing and alot better set up exhaust. i think my y pipe is probly hurting me also.
10-24-2009, 09:35 AM
#28
https://ls1tech.com/forums/dynamomet...l#post12348215
10-24-2009, 09:38 AM
#29
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XtraCajunSS
can i see the dyno sheets on the pulls with and also with out the flowmaster. im curious to see what real numbers are before i get to the shop next saturday. then ill be able to give some real numbers with and with out and see what our dyno says.
red 02 camaro
13.9 @102? im not sure what effect the DA is but where im at i had a stock 95Z m6 perfect condition and low miles that was running a 14.0 and idk what speed. idk if thats good for me or bad for you? those 2.73 i can promise you are proly killing you if its stock. geras make a big diff in feeling. i love my 4.10s just not a road trip car anymore. but alot of fun on the street
can i see the dyno sheets on the pulls with and also with out the flowmaster. im curious to see what real numbers are before i get to the shop next saturday. then ill be able to give some real numbers with and with out and see what our dyno says.
red 02 camaro
13.9 @102? im not sure what effect the DA is but where im at i had a stock 95Z m6 perfect condition and low miles that was running a 14.0 and idk what speed. idk if thats good for me or bad for you? those 2.73 i can promise you are proly killing you if its stock. geras make a big diff in feeling. i love my 4.10s just not a road trip car anymore. but alot of fun on the street
10-24-2009, 09:42 AM
#32
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Hanns249
i buy it. i could tell a huge change when i got my car running. it was no tune with open exhaust out the back. i put that muffler on it and tuned it and im sure the damn thing got slower.
i buy it. i could tell a huge change when i got my car running. it was no tune with open exhaust out the back. i put that muffler on it and tuned it and im sure the damn thing got slower.
10-24-2009, 10:24 AM
#34
I was just curious because you said you had stock rebuilt LS1 heads, so I just wanted to make sure "stock" didn't also include stock springs hahaha. You just never know sometimes. Looks good. It is most likely the flowmaster/stock LS1 heads/LS1 intake thats holding you back a good 50-70rwhp.
10-24-2009, 11:01 AM
#36
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haha true. the way i run my car if it had stock springs it would run no longer. i got all the parts i thought would hold together. im gonna look at cutting that off today after work.
10-24-2009, 11:11 AM
#37
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So don't buy it, just learn a lil. Its actually +70rwhp and +84rwtrq.
https://ls1tech.com/forums/dynamomet...l#post12348215
https://ls1tech.com/forums/dynamomet...l#post12348215
10-24-2009, 02:00 PM
#38
lemons12.
converter is stock. its my dd. im not as worried about the numbers since i can pull on a 6.0 all day long and ive ran another cammed 99 m6 car and he didnt fair as well either. now that was with my stock tires. i now have 4.10s and dr's. so that being said you think its a mid 12 car with no flowmaster and dr's and gears? i would like to do a conveter about a 3600 or bigger and im seeing .5 of a gain on a4 cars with conveter only. it is still a full weight car.
but should i be seeing higher numbers when i put it back on the dyno with my new better flowing and alot better set up exhaust. i think my y pipe is probly hurting me also.
converter is stock. its my dd. im not as worried about the numbers since i can pull on a 6.0 all day long and ive ran another cammed 99 m6 car and he didnt fair as well either. now that was with my stock tires. i now have 4.10s and dr's. so that being said you think its a mid 12 car with no flowmaster and dr's and gears? i would like to do a conveter about a 3600 or bigger and im seeing .5 of a gain on a4 cars with conveter only. it is still a full weight car.
but should i be seeing higher numbers when i put it back on the dyno with my new better flowing and alot better set up exhaust. i think my y pipe is probly hurting me also.
I would definitely get a cutout. The Y-pipe with a cutout is not hurting you that much.. You might be leaving a few on the table but the gain would be minimal. You will definitely see higher numbers though, spend the 30$ on a cutout from Jegs/Summit.
C-O-N-V-E-R-T-E-R
10-24-2009, 03:06 PM
#39
i am still curious if you have done a compression test on this engine. perhaps the exhaust could be the majority of his problem, but i find it hard to believe that the muffler flows worse than a stock one. also..without seeing the ypipe it's hard to say. either way, the dyno numbers and trap speed seem to match up.
simply go cut off the muffler and take it down the track, according to these guys you'll easily gain 4 mph.
simply go cut off the muffler and take it down the track, according to these guys you'll easily gain 4 mph.