Ozz1967

iTrader: (1)

Just short of 3500lbs with me in it and full interior with a full tank of gas, AC and automatic.

morepwr

It is kind of satisfying when you are told to go home because you went "too quick"!

A.R. Shale Targa

iTrader: (2)

It does get opened up after the modification is done to it; I'd have to look at mine to see how much larger though
Also "pinch" points for intake airflow has worked plenty in the past. While not entirely apples to apples, BBC engines that used Dominator carbs were necked down to a square flange intake manifold which added throttle response and mid range torque. I do understand that in that situation you're trying to manipulate both air AND fuel but that also means there's less room for the air because of the fuel. The newer LT engines no longer need a runner to atomize fuel as it now only flows just air. Different engines, different tech, yada yada yada
Engine is still just an air pump and long runner intakes are designed for a broad torque band which tends to fall by the wayside when searching for MAX power.
We just manipulate the gearing, converter, launch rpm, etc. to keep the engine "UP"

HioSSilver

iTrader: (8)

Why waste time dynoing a engine like that with a ls6 intake.

Do you like running a 74mm restrictor?

Ozz1967

iTrader: (1)

**Best Little Enos voice***

Cause it was free dummy!



****

Honestly I don't have another $700-$1000 for a different intake/throttle body combo. Maybe next year or the year after. I'll have to upgrade my rear end first most likely before really adding any more power to it. 10-bolt life FTW!!

HioSSilver

iTrader: (8)

You shoulda saved the money from dynoing it then. That woulda got you a intake or near it. You'll probably pick up 20 with a fast.

big hammer

30-35 with a fast

HioSSilver

iTrader: (8)

If he used mid lengths or the lsx rt fast and turned it harder probably so.

Ozz1967

iTrader: (1)

q
Yeah, I can see that now.

The main issue was when i started i was going to use a 700r4 that a friend built for his 406 sbc. That limited me to one type of throttlebody so i could use the Bowtie overdrove tvmadeez system. It wasnt until near the end that i found a good deal on a 4l60e. That move however ate up the last of my funds. Call it a lack of planning or clear direction if you want.

99 Black Bird T/A

iTrader: (4)

Ozzie, thank you for sharing your engine dyno results.

The TPIS 90mm snout costs about $350 and a WARR 92mm less than half of the snout Mod. For less than $500 you to have a 90mm LS6 intake set up. On my small cam 229/229 383 stroker with TEA LS6 heads the the trick LS6 made better hp & tq than a 102 Fast LSXRT - basically in the same rpm range as your engine dyno. I also think a Fast will gain hp over your current intake set up. Only testing would show for sure which intake is the absolute best for your set up but I think it's safely to say a 90mm set LS6 or Fast will gain over the stock LS6. Likewise a the 90mm TBSS will gain over the LS6. The TBSS is ugly but effective and usually about $150 or so.

KCS

iTrader: (20)

I guess I'll be that guy.

I disagree that the LS6 intake is "the problem". I made 413whp on a Mustang dyno with an LS1 intake and we all know the LS6 is better. You can look back in the Dyno Results section and see lots of cars that dyno over 440whp with stock LS6 intakes.

If your funds are depleted, there probably isn't much more you can do besides just getting the engine in the car and getting the final tune done. You never know, it's not like it's unheard of to gain power by fine tuning the ECM for a combination versus some cookie cutter tune.

big hammer

Imagine how much more they would dyno with a better intake tho

HioSSilver

iTrader: (8)

Yup...the crazy part is the intake opening is smaller than the tb opening. Much to be had there.

kinglt-1

iTrader: (26)

Nice combo! Imo when you save some funds, sell the LS6 setup and pickup a used Fast. Shop around and I bet you find a 92 setup for a good price and I would not be surprised if you only end up out of pocktet 400 after selling the LS6.

KCS

iTrader: (20)

Probably more than this combo since it's not at the max capacity if the LS6 intake.

big hammer

Is there a set hp where it becomes a restriction like 499 hp all is good then at 500 hp bam major restriction?

G Atsma

I would think there is a level where it STARTS becoming a restriction, then gets more severe as it climbs. Not like hitting a wall, more like a steeper uphill climb as it goes.

KCS

iTrader: (20)

It's somewhere above 440whp as several cars have already demonstrated. At 486hp at the flywheel, this engine is probably closer to 410whp, depending on the drivetrain. Like I said, I made that with an inferior LS1 intake.

HioSSilver

iTrader: (8)

I picked up 13 whp in the 400ehp hp range with a ported fast 90 over a ported ls6 intake. Same day same dyno. He stands to get a good gain.

big hammer

So the ls6 intake is perfect until 440 rwhp then becomes a major restriction at 441?