Dorman ls2 intake?
05-15-2017, 03:06 PM
#262
Launching!
That would help considering the dls6 is the same as dls2. The issue i have is that the shoulder that holds the O ring gasket doesnt go deep enough into the ls2 style intake to seat the oring. So it doesnt seal and worse could be sucked into the intake.
05-15-2017, 03:10 PM
#264
Launching!
Here's what you can do. Take the map sensor adapter piece that comes in the dorman ls2 intakes and compare it directly to the egr block off you carry. I did this and found the dorman piece to be slightly longer. Maybe a quarter inch but dont qoute me on that. Id take a picture but Ive lost the map sensor piece that came with mine.
05-15-2017, 06:08 PM
#265
We have 5 on hand. They are unopened and waiting on some plates etc for pressure testing, so id rather not bust em open yet.
I can give you the dimensions of our egr plug.
From the flat behind the flange is 5/16" to the o ring boss, the boss/o ring is 1/8" wide and total height is a little over 1/2 inch.
I can give you the dimensions of our egr plug.
From the flat behind the flange is 5/16" to the o ring boss, the boss/o ring is 1/8" wide and total height is a little over 1/2 inch.
05-17-2017, 10:01 AM
#267
I'm really on the fence about the dorman ls2. After doing some research it seems like it *may* not be worth much more than 5hp at the flywheel over an ls6 intake. Here's my logic:
So we all know the tbss and the dorman flow very close to the same. The dorman beats the tbss in the low lift ranges by a very small amount and the tbss beats the dorman past .550 lift by a small amount. Ok. Then there a dyno test and the tbss beats the ls6 intake by 5 peak hp and 14tq. Flow isn't everything however but I think this is a decent indication of the hp difference the ls2d may be over a ls6 intake. So as it looks right now it might be the best bet to skip the dorman and get a fast 102. Do it right the first time kind of thing.
Here's some data from the magazine test.
Tbss intake Ls6 intake
Max hp 562 557hp
Max tq 497 483tq
Avg hp 444 432
Avg tq 464 450
Tq @ 4000rpm 469.5 454
We all know the tbss intake is going to make more tq too. Just my .02 until someone else can dyno prove other wise.
So we all know the tbss and the dorman flow very close to the same. The dorman beats the tbss in the low lift ranges by a very small amount and the tbss beats the dorman past .550 lift by a small amount. Ok. Then there a dyno test and the tbss beats the ls6 intake by 5 peak hp and 14tq. Flow isn't everything however but I think this is a decent indication of the hp difference the ls2d may be over a ls6 intake. So as it looks right now it might be the best bet to skip the dorman and get a fast 102. Do it right the first time kind of thing.
Here's some data from the magazine test.
Tbss intake Ls6 intake
Max hp 562 557hp
Max tq 497 483tq
Avg hp 444 432
Avg tq 464 450
Tq @ 4000rpm 469.5 454
We all know the tbss intake is going to make more tq too. Just my .02 until someone else can dyno prove other wise.
05-17-2017, 11:34 AM
#268
I'm really on the fence about the dorman ls2. After doing some research it seems like it *may* not be worth much more than 5hp at the flywheel over an ls6 intake. Here's my logic:
So we all know the tbss and the dorman flow very close to the same. The dorman beats the tbss in the low lift ranges by a very small amount and the tbss beats the dorman past .550 lift by a small amount. Ok. Then there a dyno test and the tbss beats the ls6 intake by 5 peak hp and 14tq. Flow isn't everything however but I think this is a decent indication of the hp difference the ls2d may be over a ls6 intake. So as it looks right now it might be the best bet to skip the dorman and get a fast 102. Do it right the first time kind of thing.
Here's some data from the magazine test.
Tbss intake Ls6 intake
Max hp 562 557hp
Max tq 497 483tq
Avg hp 444 432
Avg tq 464 450
Tq @ 4000rpm 469.5 454
We all know the tbss intake is going to make more tq too. Just my .02 until someone else can dyno prove other wise.
So we all know the tbss and the dorman flow very close to the same. The dorman beats the tbss in the low lift ranges by a very small amount and the tbss beats the dorman past .550 lift by a small amount. Ok. Then there a dyno test and the tbss beats the ls6 intake by 5 peak hp and 14tq. Flow isn't everything however but I think this is a decent indication of the hp difference the ls2d may be over a ls6 intake. So as it looks right now it might be the best bet to skip the dorman and get a fast 102. Do it right the first time kind of thing.
Here's some data from the magazine test.
Tbss intake Ls6 intake
Max hp 562 557hp
Max tq 497 483tq
Avg hp 444 432
Avg tq 464 450
Tq @ 4000rpm 469.5 454
We all know the tbss intake is going to make more tq too. Just my .02 until someone else can dyno prove other wise.
05-17-2017, 11:58 AM
#269
I disagree..... first off sick of guys that compare the LS6 to TBSS they are very different intakes and the LS6 is not even close in performance. First this is just one test. Real world the truck intake perform better than what is here in most cases. Everyone wants to look only at peak hp in this test . What you negecting is power made under the curve is not even close. Double digt gains in every category and 15.5 tq @ 4k rpm. That peak # of LS6 was at 7000 rpm . If you back that down to 6200 where most of our cars peak at you wold see a 12hp gain.
05-17-2017, 12:03 PM
#270
Btw I compared them BECAUSE
A) the test only had the tbss and ls6 together
B) the ls6 was not flowed against the dorman intake, the tbss was and I used that as a LOOSE comparison stating that airflow isn't the only thing that matters. This is the only real world tests I have to go off of. If you have some better proof, testing, dyno, flow sheets etc then offer them up. Otherwise you'll just have to continue being sick of guys comparing the two manifolds because as of right now that's the only tests that have been publicly posted.
A) the test only had the tbss and ls6 together
B) the ls6 was not flowed against the dorman intake, the tbss was and I used that as a LOOSE comparison stating that airflow isn't the only thing that matters. This is the only real world tests I have to go off of. If you have some better proof, testing, dyno, flow sheets etc then offer them up. Otherwise you'll just have to continue being sick of guys comparing the two manifolds because as of right now that's the only tests that have been publicly posted.
05-17-2017, 12:07 PM
#271
05-18-2017, 07:11 AM
#272
Launching!
05-19-2017, 07:26 AM
#273
Ok fellas, I got a email from rock auto letting me know they got some dorman 615-901's in. How I have no idea because dorman told me two days ago that they wouldn't have any more in till the end of the month, so we shall see. I have a feeling I'll get a notification that I'm getting a refund or these are on back order. $328 shipped I couldn't pass it up tho. I could get it in town for $297 but they won't have any more in till next month, and patience isn't something I have so......
I want to try and run the car at the track as it is now then put the manifold on and retune and run again. I'm not going to dyno any time soon so that's all I'll have for now. I plan on cleaning up the airflow restrictions I've seen in pictures so my comparison will not be an out of the box manifold.
I want to try and run the car at the track as it is now then put the manifold on and retune and run again. I'm not going to dyno any time soon so that's all I'll have for now. I plan on cleaning up the airflow restrictions I've seen in pictures so my comparison will not be an out of the box manifold.
05-19-2017, 11:13 AM
#276
In my intake flow testing thread the Dorman LS2 had about 7 cfm over the TBSS. In a well optimized set up 2 hp to 2.2hp per cfm is what can be expected. That would be about 14 to 16 hp. The .400 lift numbers on where I put the most emphasis when looking at flow data.
Flow testing has limits and is a rough starting point.
My experience with the 102 TB and 102 LSXRT was horrible driveability even with over half a dozen tuning sessions with expert tuners. The LSXR intake might not be quite as bad but I would give a take a 90 TBSS or Dorman LS2 over any 102 Fast set up due to driveability concerns/issues if the car or truck is a daily driver.
Beside hp questions the other question is which intake can be effectively tuned by the tuning resources at hand. A bad driving set up sucks on the street.
Flow testing has limits and is a rough starting point.
My experience with the 102 TB and 102 LSXRT was horrible driveability even with over half a dozen tuning sessions with expert tuners. The LSXR intake might not be quite as bad but I would give a take a 90 TBSS or Dorman LS2 over any 102 Fast set up due to driveability concerns/issues if the car or truck is a daily driver.
Beside hp questions the other question is which intake can be effectively tuned by the tuning resources at hand. A bad driving set up sucks on the street.
05-19-2017, 11:56 AM
#277
In my intake flow testing thread the Dorman LS2 had about 7 cfm over the TBSS. In a well optimized set up 2 hp to 2.2hp per cfm is what can be expected. That would be about 14 to 16 hp. The .400 lift numbers on where I put the most emphasis when looking at flow data.
Flow testing has limits and is a rough starting point.
My experience with the 102 TB and 102 LSXRT was horrible driveability even with over half a dozen tuning sessions with expert tuners. The LSXR intake might not be quite as bad but I would give a take a 90 TBSS or Dorman LS2 over any 102 Fast set up due to driveability concerns/issues if the car or truck is a daily driver.
Beside hp questions the other question is which intake can be effectively tuned by the tuning resources at hand. A bad driving set up sucks on the street.
Flow testing has limits and is a rough starting point.
My experience with the 102 TB and 102 LSXRT was horrible driveability even with over half a dozen tuning sessions with expert tuners. The LSXR intake might not be quite as bad but I would give a take a 90 TBSS or Dorman LS2 over any 102 Fast set up due to driveability concerns/issues if the car or truck is a daily driver.
Beside hp questions the other question is which intake can be effectively tuned by the tuning resources at hand. A bad driving set up sucks on the street.
05-19-2017, 12:46 PM
#278
Sorry...got pns mixed up. we have the ls2 on hand, no ls6. If you want to know what we do and do not have, ask me. Our website doesnt show everything we carry and sometimes the parts are so new we wont list them for a bit due to testing, and the amount of time it takes to add plus working on the new site.
05-19-2017, 12:49 PM
#279
The lsxrt had (and still has) issues. If you can address them all (dont ask me which ones and how many they are all different) then it works ok, but the attention to detail and double checking on an expensive intake just doesnt feel worth it.
Id rather sell an edelbrock or holley honestly or this new dorman truck intake
Id rather sell an edelbrock or holley honestly or this new dorman truck intake
05-19-2017, 01:08 PM
#280
Sorry...got pns mixed up. we have the ls2 on hand, no ls6. If you want to know what we do and do not have, ask me. Our website doesnt show everything we carry and sometimes the parts are so new we wont list them for a bit due to testing, and the amount of time it takes to add plus working on the new site.