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A sheet metal intake will behave nicely at low speeds (more a function of the cam anyway), but won't make nearly as much power as a stock or FAST. You don't have the flow velocity.
The sheetmetal intake with the heads and cam made more power than the stock LS1 GTO heads/cam and intake on the dyno everywhere from 2,500+.
The car does not even come close to being able to plant the power it has as is.
The FAST cathederal port truck intake and nick williams 102mm DBW throttle body did not impress me on the 6.0L S10 I tuned. Could have been the low compression from 317 heads or the cam or the 3.42 gears behind the 4L80E. As a whole I felt the truck should have been alot quicker.
I'm sure there are differences between sheetmetal intakes. I might be referring to tests that used ones with weaker low end than what you used. Hopefully there are some that have a good powerband. Of course having a cam that "talks nice" with such a manifold would make a big difference too.
Nothing to do with a tune. Its mathematics. Sheet metal intakes do not provide velocity required to feed the engine throughout 75% of the rpm range. If your only spinning to 7000-7500 this would be foolish and you'd be utilizing the power offered from the sheet metal intake for 500 rpms....so that being said AVERAGE power would be much higher with a long runner intake like a fast or MSD which is why they are so popular. If it's a race car with a big cam, lots of hear, little weight and a loose converter then yes, rock the sheet metal intake Everything else, no. You will be slower, partial throttle application will feel lethargic. I dont care how it felt in your car, a bolt on ls1 with a 3600 converter will roast tires when you nail it on the street. Tune has nothing to do with it, a proper cam will help take more of an advantage of the sheet metals power potential and you likely would want the same cam in a sheet metal intake as you would a stock style.
Honestly with your setup I would call for a custom grind.
That being said, I will be going with a 228r in my ls6 swapped trans am when I get to that project. It might be an "old school grind" but it makes decent power with good drivability.
Nothing to do with a tune. Its mathematics. Sheet metal intakes do not provide velocity required to feed the engine throughout 75% of the rpm range. If your only spinning to 7000-7500 this would be foolish and you'd be utilizing the power offered from the sheet metal intake for 500 rpms....so that being said AVERAGE power would be much higher with a long runner intake like a fast or MSD which is why they are so popular. If it's a race car with a big cam, lots of hear, little weight and a loose converter then yes, rock the sheet metal intake Everything else, no. You will be slower, partial throttle application will feel lethargic. I dont care how it felt in your car, a bolt on ls1 with a 3600 converter will roast tires when you nail it on the street. Tune has nothing to do with it, a proper cam will help take more of an advantage of the sheet metals power potential and you likely would want the same cam in a sheet metal intake as you would a stock style.
It does not feel lethargic at all. You must just be really dense. Just because it is sheet metal does not mean it has massive ports!
Honestly with your setup I would call for a custom grind.
That being said, I will be going with a 228r in my ls6 swapped trans am when I get to that project. It might be an "old school grind" but it makes decent power with good drivability.
I think a custom grind it s not needed. The bottom end us stock. The heads are worked that's it. The intake choice will be a very common choice.
I looked into the 228R as well. But I have to say I'm tempted by the summit cam and so I ll rather consider it.
It does not feel lethargic at all. You must just be really dense. Just because it is sheet metal does not mean it has massive ports!
its not the size of the ports I am referring too but the length of the runners. Large ports with short runners favor high rpm where a greater demand of air is required in a shorter amount of time. It may feel just fine for you, but it could be better.
Adding another intake to the "game" the dorman or dorman replica 615-183 truck intake.
I have a comple old style truck intake with rails inj. And dbc tb. thus parts would fit right on.
this intake is a 3 piece and as far as i understand comes close to the tbss performance.
+ you can port it easily.
Now.. would a102 mm tb work on this guy IF ported?
its not the size of the ports I am referring too but the length of the runners. Large ports with short runners favor high rpm where a greater demand of air is required in a shorter amount of time. It may feel just fine for you, but it could be better.
I am very familiar with runner length and also CSA.
I have also played with the LT1 and it only has a 4" intake runner in the manifold. I have played with a long runner TPI too. Also played with dual plane and single plane intakes.
I would love to see Edelbrock put injector holes in their high rise dual plane intake. Then a person could run a 1200 cfm 4150 throttle body on top. The dual plane intake has an even flatter torque curve than any single length intake runner.
I have been running a dual plane efi intake on a healthy 383 for over 6 months. It makes killer torque and still has great hp up top. My VE table is almost flat as the rpm rises and the cylinder air graph stays high and flat from off-idle through redline.
I think a custom grind it s not needed. The bottom end us stock. The heads are worked that's it. The intake choice will be a very common choice.
I looked into the 228R as well. But I have to say I'm tempted by the summit cam and so I ll rather consider it.
My stock bottom end lq4, with stock 241 heads and stock ls6 intake with a custom grind cam made 425 wheel with pretty low compression. Huge cam with terrible driveability at low throttle tho. I would call around for a custom grind, hell summit would probably even spec you a good custom grind for a decent price.
Adding another intake to the "game" the dorman or dorman replica 615-183 truck intake.
I have a comple old style truck intake with rails inj. And dbc tb. thus parts would fit right on.
this intake is a 3 piece and as far as i understand comes close to the tbss performance.
+ you can port it easily.
Now.. would a102 mm tb work on this guy IF ported?
It would flow well, but I wouldn't try to put a102 TB on it. I doubt there is that much meat to port out to fit it.
