did you use those runners with that base??? i dont get how making it flow individualy through the runners and then have it open back up for 1", and then back to individual.....the base is ported good, the plenum is ported good,,,then you have the runners . you were deffinatly suppose to get siamesed runners if you siamesed the plenum and base.

 

Look at it again. What it is doing is allowing for each runner in the lower intake to grab its' air from both of the runners, and not just one single runner. This, essentially, doubles the size of the runner for every intake valve and speeds up the charge. Velocity is the key here. By the way, the lower intake ports that were siamesed on the lower intake are more than one inch deep, they are two and a half inches deep...

 

I have wondered myself how this would be beneficial. At a glance it appears that this would create more turbulence than anything else and actually hurt flow. However, I have heard others who performed this mod say that it did extend their top end noticably. My combo already pulls hard past 6,500 and works well shifting at 6,800 so I don't think I want to try anything like this right now. I'm watching what 89GTA is doing for ideas for the future.

 

Those AS&M Runners With The Stock Plenum Matched Up & Ported Hi Flow Base Is Exactly What I Want At The Top, I Want To Keep It Looking Factory. Then Going With The 195 AFR Heads And Then A Comp Cam, But Still Looking Into Cam Specs. What Power Are You Making With That Intake Set Up If You Don't Mind Me Asking?

 

Yeah He Said He Rebuilt The Motor After Pulling It Out Because It Was From The Junyard, So I Have No Idea What He Put Into It. My Friend Was The One Who Was Buying The Car At The Time So I Wasn't Paying Attention To Everything He Was Saying, I Had No Idea I Was Going To Buy The Car Off My Friend A Year Later. I Wish I Had A Way To Get In Contact With The Guy Again. All I Know Is He Stays Over In San Diego Somewhere.

 

With These Direct Inject Engines GM Is Working On The LS Engine In General Will Become Old Technology Within A Couple More Years. Just Think In About 10 Years The Younger Generation Of Gear Heads Still In Elementary & Middle School Now Will Be Knocking LS Guys Saying They Are Old LoL It's A Never Ending Cycle, But No Matter How Old Or How New There Is Always Respect For A Car Being Original From It's Time Period, It's A Part Of History. Wasn't The 5.7L TPI & 700r4 Trans The 1st Corvette Engine/Trans. To Be Put Into A Camaro & Be Mass Produced From The Factory? Just About Every SS Or Z28 Camaro Since Then Has Had An Engine & Transmission That Originated From The Corvette.

 

Ha yeah it is a never ending cycle of change. What gets me sometimes is that the basic knowledge of how an internal combustion engine works (Gen 1 - Gen 5 engine family soon) is still important.

I amazes me that many of the LS people won't want to work on a car that has a carb on it. No matter what generation of engine you are running you still need to understand the basics. Then you can go from there and change things as you see fit.

I like my old school TPI L98. I plan on keeping that engine in my car. I have no problem with the LS guys but, I don't like it when they bash on TPI and carb old school motors. Ha ha if the old school Gen 1 small block wasn't a such a sucess there would be no LS engines now. People forget that GM was thinking about getting rid of the V8 engine for good in the late 70's and early 80's because of all the new emissions and fuel economy standards. Even now with the new Gen 5 small blocks, GM is saying that they will have a reduced displacement (when compaired to the Gen 4 motors in production now). The power and performance should be compariable to what is available now thanks to direct injection and some more weight saving measures taken.

As someone mentioned before, the Gen 1 - Gen 4 LS motors are very good but will be uphanded by the new Gen 5 series of motors now. As good as the LS1 engine is you could say that it's an old school LS engine (debuted in 1997 in the C5) now compaired to the LS3, LS7, LSA, and LS9 that have come out in recent years.

 

Yeah I See Where You're Coming From & I Agree, Just Because An Engine Is Old Doesn't Make It Junk, For It's Time It Was The Sh** And People Bought It! If Something Was Junk It Would Have Never Sold Enough To Make Something New. Carbs Sold Good So The TPI Came Out, The TPI Sold Good So The LT Series Motors Came Out, The LT's Sold Good So GM Came Out With The LS Engines And So On.

 

 

Random Question, Is Or Has Anybody Ever Used A 400 Transmission With A TPI? I Was Wondering If That Would Be Better Than A 700R4.

 

Gear ratios are better but it takes more power to turn the guts of a th400 compaired to the 700r4

 

Kevin, I'd like to come down and check this out. Do you guys plan on having one any time soon? If sometime in the late fall, like november, when the weather is cooler, I might drive down. There are some things I'd like to talk over with you in person. I've been following your success with TPI, as well as the other socal members. I'm looking to follow your lead and get more out of my combo. Thanks

Will

 

Just for general information I re-dyno'd my long tube runner setup and with 21+" total runner length the peak horsepower was at 6500rpm. No more information will be available at this time. To much competition going on around here. Got to keep things in reserve against those pesky LSX swaps around here in case I need to go back to the track.

 

I would like to see a dyno graph of your combo at 6500 rpm.
Here is mine and 89GTA's:
Mine is the one that is falling off, his goes on past 6800.

 

It has a first base flowing 300+
This is the intake runner setup: