Ported L76 vs Ported Fast 102
03-03-2010, 08:05 PM
#1
FormerVendor
Thread Starter
iTrader: (3)
Join Date: Jun 2007
Location: Virginia Beach,Virginia
Posts: 2,991
Likes: 0
Received 2 Likes
on
2 Posts
Ported L76 vs Ported Fast 102 this test was done using a 427 with WCCH ported l92's.The cam is very mild,i think with a wilder cam and more rpms,the intake would even shine more.The L76 intake was professionally ported with a ported 90mm tb.The FAST was ported in house and we used a NW 107mm tb.The intake was opened up to match the 107mm tb.
and they say the FAST doesn't work
and they say the FAST doesn't work
03-04-2010, 02:11 PM
#4
I dont think anyone has said they dont make big gains on big cubes.... Its just that they dont seem to gain anything on stock cube LS3's.... yet...
Maybe its the cam selection that needs a re-work? On that note all the cam spec secrecy with LS3 cams these days is rather annoying and quite pointless. It just creates confusion and will force some of us to go at it our own and post results. Think Predator-Z a couple years back etc. All that can be avoided with some more "buy this, buy that, install it yourself and you'll be happy as a pig in shizzle"
Most guys with new cars are still going to go to the pros for installs anyways its not going to change the market. Most guys that build there own stuff once it works and they're out racing disappear from the boards and say very little because they're too busy to bother as there is nothing to gain.
Anyways rant aside ( not specifically directed at you VA speed )
Those are some very nice gains. Killer build. Big respect
Maybe its the cam selection that needs a re-work? On that note all the cam spec secrecy with LS3 cams these days is rather annoying and quite pointless. It just creates confusion and will force some of us to go at it our own and post results. Think Predator-Z a couple years back etc. All that can be avoided with some more "buy this, buy that, install it yourself and you'll be happy as a pig in shizzle"
Most guys with new cars are still going to go to the pros for installs anyways its not going to change the market. Most guys that build there own stuff once it works and they're out racing disappear from the boards and say very little because they're too busy to bother as there is nothing to gain.
Anyways rant aside ( not specifically directed at you VA speed )
Those are some very nice gains. Killer build. Big respect
03-04-2010, 02:22 PM
#5
I have a 402ci,ported l92's stock l76 intake ect. We put a fast 102mm on the motor and it made no gain at all on the dyno on a back to back runs. I don't feel porting it would of helped at all if it didn't make a gain over a stock l76 intake. Grand spent from my pocket to make no gain and i have a bigger motor then a stock ls3.
Last edited by mike c.; 08-16-2010 at 06:56 PM.
Trending Topics
03-04-2010, 03:11 PM
#8
Restricted User
Join Date: May 2009
Posts: 295
Likes: 0
Received 0 Likes
on
0 Posts
03-06-2010, 06:20 AM
#14
427 Old Cam............................................605/588
427 New Cam...........................................621/601
427 Port Matched FAST w/ 90mm TB............633/616
427 Shawn Miller massaged FAST/107mm TB..656/614
The big TB picked up a couple. Most of the gains are from the modified FAST.
03-06-2010, 12:41 PM
#16
Sooooo Happy that we FINALLY have a QUALITY comparison on the FAST 102 intake for LS3 heads!!! People need to take notes on how to do a proper comparison and how important it is to get baseline numbers first, Before you jump on the internet and go off about how the intake sucks and made zero hp. Great Job to Virgina Speed and hats off to Kevin again for keeping the faith in the LS3's heads and the FAST intake.
03-06-2010, 02:33 PM
#17
633/616 to 656/614= +23hp -2 rwtq according to wkmcd Right?
Of course it doesn't look like that on the dyno sheet...
03-07-2010, 07:26 AM
#19
On The Tree
iTrader: (17)
Join Date: Aug 2005
Location: Rochester, NY
Posts: 193
Likes: 0
Received 0 Likes
on
0 Posts
Nice results, substantial increase in power. I would love to see a comparison like this on a cammed bolt on LS3 with a stock intake vs. ported stock vs. the fast unported and fast ported. We hear a lot that this intake doesn't work on stock cubes but it would be nice to see the difference between the 4. Same cam everytime, just intake swaps and a TB to match since most people will upgrade the TB when swapping/porting the intake.
Last edited by Ramairbird; 03-07-2010 at 07:38 AM.
03-07-2010, 10:46 AM
#20
The final numbers are not from a stock FAST. The FAST, port matched and the big TB, went up to 635, up from 621, over the ported L76 and 90mm tb. A nice gain.
It didn't make the big numbers until someone did FAST's job for them, ported it, hogged the opening and put a 107 on it.
So, it works on a big cube engine. Nobody ever said it wouldn't, the issue was always the 6.0-6.2L which is the engine it was designed for.