Mr. SSinister

iTrader: (2)

Check out Rock Auto for the Dorman intake. You can often find an additional 5% off coupon codes online as well. Put the code in where it asks where did you hear about us. I got mine shipped to California for less than $300 total.

corvet786c

iTrader: (6)

I am actually already running the fast 102 lxr with ls2 tb conversion and currently having about 10lbs of boost on a 4.38 pulley. In my opinion I love it, and its not even ported. Just wanted to see what kind of numbers it put up against.

ss4chad

iTrader: (26)

Sent you an email Tony, thanks!

I will get a hold of you Wade, thanks for all the work. You get an internet 2 Thumbs Up!!

Chad

xEtherealx

Thanks again for running these! That Super Auto intake isn't bad for $80

99 Black Bird T/A

iTrader: (4)

Thank you to all to lender intakes for the test. You are really the ones who made this possible

This weekend I will start working on returning the borrowed intakes. I just got back in town and hope to ship next week. I will contact before shipping so we can make sure the intake ships where desired.

I have a new 02 Z28 and am now a club catfish member the car is bone stock and will probably set headers and the LS6 90 intake. Not sure after that. The car has 239,000 miles after all.

StealthFormula

iTrader: (35)

This thread motivated me to go 90mm LS6 along with the fact that my stock daily driver GMC Sierra has a larger throttle body than my modded Vette, can't be having that. After months of searching I just stumbled upon a used TPIS 90mm LS6 so I picked it up. I am gonna track down a ported LS2 TB to go with it. Gonna toss it on my cam + bolt-on C5 Z06. Before numbers are 436rwhp/415rwtq with stock LS6 manifold and ported stock 78mm throttle body. I needed to get my car retuned regardless because I have larger injectors waiting to go on so I will happily toss it on the dyno and get it tuned in a month or two and report back the details. It won't be direct A-B comparison since my last dyno tune was done this past October but it will be the same tuner and dyno. I currently have 40 weight oil in the motor now since it's road race season so that might drop the hp/tq numbers a touch versus before when I dynoed it with 30 weight oil but it should still shed some light.

omc8

iTrader: (7)

Rockauto has not sold the DLS2 intake 615-901 since early September last year . Read my post # 336 ..... https://ls1tech.com/forums/generatio...l#post19753707
They still sell the DLS6 and other Dorman parts tho

99 Black Bird T/A

iTrader: (4)

StealthFormula, I am looking forward to seeing the dyno results. Getting data on a heads and cam car like yours will be great. I'm hoping in a couple of months to do headers Y pipe on a stock 02 Z28 and get a baseline and then install the LS6 90 used in the flow testing and dyno. It will only be on a basic bolt on car.

wicked-irocz

Thank you Black Bird and WS6 store for this data!

99 Black Bird T/A

iTrader: (4)

Someone has offered to send their 92 mm LSX intake for testing!!!

StealthFormula

iTrader: (35)

Got the car dyno tuned with the TPIS 90mm LS6 manifold....

Before numbers (October '17) with the factory stock LS6 manifold and ported stock TB were 436rwhp/415rwtq. After numbers with the TPIS 90mm LS6 manifold and ported LS2 TB were mixed with the best pull being 431rwhp/410rwtq. 5rwhp/5rwtq loss . This is on my C5Z with 228/232 cam and typical bolt-ons.

The temperature inside the shop was 20 degrees warmer versus when it was on the dyno previously. The power numbers dropped hard to 420rwhp/400rwtq on the subsequent pulls. Was an overall bad day. Talk about brain fart, while getting the car off the rollers we realized I had my PCV routing all wrong therefore increasing crankcase pressure (the fresh air source line coming from the passenger valve cover should of been tapped in somewhere between the MAF and TB but I had it connected to the intake manifold after the TB). Car also started smoking at idle, turns out several valve stem seals lifted off the valve guides during this ordeal. Given everything described above, not sure what to make of the numbers. Was hoping to provide better results for those interested, just didn't pan out. Car is now fixed but I don't plan on putting it back on the dyno for re-runs. Car runs good with the manifold tho, clipped 170 mph the other day with ease and wasn't showing any signs of letting up.

NSFW

Air temps alone can make a huge difference, so I wouldn't lose any sleep over those numbers. If you want to know what difference the intake really made, go back in October and try again with comparable air.

At a dyno day years ago (and with a Subaru) I got 377whp, and the guy after me got 375. I was about to do a victory dance when he propped his hood up and got 398 on his next pull.

99 Black Bird T/A

iTrader: (4)

StealthFormula, thank you for following up and sharing the results. Air temp and humidity can play a factor while the dyno can factor in and correct to a standard, it's best to compare under similar/same conditions.

​​​​​Hopefully, you will have a chance to test under similar conditions at some point of you want to.

99 Black Bird T/A

iTrader: (4)

BTW - picking up a Fast 90/92 intake this weekend and starting to plan another round of testing.

big hammer

G Atsma

^^^^This^^^^^^ …...also curious....

99 Black Bird T/A

iTrader: (4)

​​​​​​Picked up the Fast LSX 90 intake today.

Still need to lay hands on a Fast LSXR for testing.

GregGo on Performance Truck forum posted this plenum volume information.

https://www.performancetrucks.net/fo...s-truck-74122/

1997-2000 LS1: #12556333
-5.06 liter Plenum vol
-262mm runner
-.536 liters runner vol

2001+ LS6: # 12573572
-5.19 liters Plenum vol
-262mm runner
-.541 liters runner vol

2002 Truck (LR4,LM7,LQ4 # 12574009)
-4.0 liters Plenum vol
-263mm runner
-.513 liter runner vol


I haven't seen info for the DLS2 or any of the Fast intakes.

One could seal off the intake runners and use a burette to measure how much it took to fill up the intake and runners. Then one could use the burette to measure the runner volume for one side of the intake. Take that total volume for the four runners and double it. Subtract that number from the total volume of the intake and runners to get a fairly good estimate.

big hammer

G Atsma

What surprised me a bit was the smaller truck plenum. Just on appearances you'd think the truck unit would have a larger plenum.

99 Black Bird T/A

iTrader: (4)

I thought the truck one would be bigger too. I guess to know for sure would require doing the measurements to confirm the data.

I think one of the key features for plenum design is to get the correct floor design to reduce reversion while working with the intake wave harmonics to get the most air moved into the cylinders. Cam timing for valve events also plays a big role of course. Likely means a bigger or smaller plenum isn't necessarily better because it depends what set up the intake is being matched too. My guess is the curved floor of the LS1 intake is what really hurts it the most in NA applications.

One engineer that had worked for several big name companies told me, one can often be fairly accurate when experienced figuring out how to improve a cylinder head. Evaluating intake manifolds were far more challenging to design and improve generally speaking. He also said the eye was less reliable for evaluation of what might work with an intake manifold.