We just got off the dyno after doing some initial testing with the twin plenum, twin throttlebody intake manifold.We managed to gain a peak of 15 WHP.We could have seen even higher gains but the we kept hitting the stock rev limiter! I think we will go back once we have the rev limiter rasied and see what the plenum does. Boost was set at roughly 7.8-7.9 psi. If you look at the dyno chart the baseline was done in October 2005 and since then I added some 19" racing Harts vs. the 17" stockers.So 20,000 miles later we still picked up a solid 15 horsepower at the wheels.I know it would have been best to do a dyno right before we installed the new plenum but that was not possible.So here is the chart, flame away

 

I will post some videos later today or tomorrow.

 

Congrats Tim.

 

Looks like you lost some torque though...but seeing as how you gained HP up top you significantly shifted the powerband higher up in the rev range. It probably pulls much harder to redline

 

It's like 287 vs. 300

 

You're gh3y

 

i would like to see a plenum spacer before and after on the same car for comparison.

 

Lost a little peak tq? so what....
LOOK at the Tq Increase from 3000 to 4400 RPM!! [borat]niiiiiice[/borat]

And look at the power Line towards redline! Keeps on Climbing baby!

Very Nice Results!

 

Overall, I am pretty happy.We need to do some more testing and see where the baseline with the stock plenum is now, not 1.5 years and 20,000+ miles ago.This is still a good testament to a stock block,heads,cams,clutch,drivetrain, etc..... ability to handle FI power for a good amount of miles. We didnt turn up the boost anymore since I really need to do a fuel system upgrade(Charles where are those rails?)The car did make 413WHP @ 6.4 psi of boost on the Dyno Dynamics but after that we took it off due to severe wheel spin and stuck it on the Dynojet.

 

Lot of money for 15 hp

 

Dont just look at peak numbers look at redline and there is about a 35-40WHP difference Peak to peak, not a big difference but at redline where almost every car we seen falls flat on its face, this one with stock cams is still going strong which means there is potential to make power way beyond 6500 rpms.

 

What's going Lee????
Now the thing is the redline HP, with the redline being the killer in the VQDE's the drop off is like a sizemograph straight down. Now if there a plenum that can maintain soild HP and TQ all the way through and possibly beyond the stock redline I do believe the price is will be hard to bet.
Now if a dyno sheet is porduced with solid evidence that shows the stk redline vs raised redline and it still holds constant HP this may be the best plenum on the market.

 

This is what we are thinking. I am going to send the ECU to Technosquare next week and get back on the dyno asap

 

i guess based on this statement i wont comment right away, ...more testing is needed, and its shaping up that this twin manifold mostly for the high whp turbos on full build engines..

 

I think with twin 3" intakes this plenum might do well on a high revving n/a

 

that woudl be nice to see.... hope somebody takes up the challenge so we can check it out

 

Very nice numbers Tim! The original dyno was with the stock plenum?

 

The power near redline is impressive...a power curve that ends with a nice 45 degree angle upward is always very promising.

 

While the steady increase in power at redline impresses me a lot, ...as everyone is mentioning, ..... Am I the only one who think that a 20 FT LB ++ increase from 3k to 4.4k is sick!!??
By just looking at the dyno chart, ... it appears that the turbos are 'spooled' Much sooner than before!!

 

How would the plenum have anything to do with turbo spool?