His dyno is freakishly high. Although he does have headers, no PS, ECU, 16" wheels, and A/F tuning

My dyno and yours is relatively comparable and so is sloppymax's. So it still supports the SAE argument. Its hard to imagine that I'll be making 20hp but I haven't dyno'ed my new setup so its hard to tell

 

With that being said, I think it's fair to say that my numbers are lower than expected. I mean with 222 at the crank, the DEK should put down about 190 stock, which I just barely hit on one run. Considering my mods, I should be closer to 210 whp, if not higher.
I also have an ECU, plus the other benefits of the full DEK, although I'm on 17's and with PS. Innovate LC-1 is most likely on it's way for accurate AF readings...then the ECU is back off to JWT to fine tune some things, such as larger injectors, richen it up above 6000, etc....

I sure would like to get my car on his dyno and see what it puts down on it....

 

I'm barely at 191-194whp with y-pipe, intake, 18 inch wheels, and ECU (old dyno)

don't feel all that bad

 

I believe the dyno I use is accurate. But here's why I think so:

1) The day I dyno'd Speedemn came with me and dyno'd also. He is a full bolt-on 5-spd with MEVI (JWT, PF TB, UDP, I/Y/test/B, Flywheel, clutch, lightweight SSR's etc) and he put down about 207/200 SAE whp/wtq IIRC. Which is just about exactly what his previous dyno results were but done on a completely different dyno and in different weather conditions also.

2) Consider that I trapped about 101 mph in the 1/4 at a raceweight of about 3250 lbs!! with seizing wheel bearings - and that trap could have been a bit higher had I not run out of powerband and had to shift at the finish line because of only having a 6900 rpm limiter.

So to me those things together are a decent indicator that the power as shown on the dyno is reasonably close.



95maxrider: I did try opening the VI earlier such as 4850 or 4900 but 5000 produced the best results for me. It could vary slightly on other cars depending on mods though.

 

I agree that your dyno looks accurate. I wish I could get on it
Since I can only open the VI at 4800 or 5000, 5000 may very well be the way to go. But I'll still check anyways

 

I'm just amazed where your power peaks not the peak value.

What is your mod list or is it some kind of secret?

Were the two runs you posted one from 3rd gear and one from 4th gear runs for the gear ratio difference?

 

I agree with Ice. No one is disbelieving your numbers

 

Alex the mod list was linked in the thread NmexMAX gave.. but here's the main things:

I/H/Y/test/B
UDP
00VI
JWT and EU (fuel tuning only)
no PS

Yes one run was 3rd gear and one 4th gear.

As for the power peak I think I can move it a little higher up yet. Or at least decrease the slight drop off past the peak point. I did that dyno with a crappy Injen intake. I will be doing some custom intake stuff this spring and I'm sure I can improve the top end curve a bit yet.

 

Is that you activate it with your EU at 5000 or does it activate at 5000 by your tach. Because mines has about 200-300 rpm difference from what the tach reads and what my VAFC-2 reads (which is more accurate then the tach).

 

5000 on the EU (and as measured by the dyno rpm pickup also).

 

Neal,

If you do decide the midrange loss isn't a big deal and pull the PV, you should DEFINITELY open up the square VIAS chamber ports and unshroud the overhang infront of them.

Square Port and Shroud:


Shroud:



I think the DEK IM could flow much better with a few minor tweaks.

 

I don't know, you could mess up laminar flow. Also, what is the DE-K manifold made of? You might not be able to port the intake.

 

I too think there's some room for improvement up high if you don't mind the midrange loss.

It's a composite plastic. You can port it easily if you are careful and there's adequate material.

 

The disruption in flow would only happen if the PV was still in place and closed. Removing the lip would help smooth air entering the VIAS chamber once the PV opens or if removed.

Turning a square into a circle/oval will improve flow, so that's not an issue.

 

You can't port an LS1/LS6 intake and it's composite plastic.

 

StephenMax has done far more then porting and it held up fine.

Are you thinking the material is too thin or just weak?

 

I've never seen the inside of the 00 VI personally, nor seen one ported. Your guess is as good as mine. I guess someone can try it out and get before/after flowbench readings.

 

I doubt anyone will get flowbench results.

It isn't really porting per say...more like removing excess material overhang and from what I've seen wouldn't have much if any strength issues.

 

Yeah I wasn't referring to porting in the truest sense of the word.. more like what Ice is describing.

But really the only point I was making was that the plastic can be worked on in a similar manner to metal as long as there's enough material. This I have personally done on an 00VI.

 

It's worth a try, but you are wasting your time without flowbench testing it. I've even heard of people loosing hp due to porting. It's a fine art and you have to know what you are doing.

 

That's true when changing port size for volume vs. velocity, but not removing these obvious restrictions.

 

Well if you are removing a restriction, you are changing the volume and flow

From those pics, it looks pretty difficult to get to that restriction???

 

Exactly, increasing both isn't a bad thing. It's when you have a tradeoff between the two that you need a flowbench.

If I can take a picture of them with my POS camera, they can be reached.

 

Reached with what tho

Maybe we will do it to my buds 00 since we are removing the rod anyways.

 

Expensive route ~$119:


Cheap route $30:

 

I'm not saying you're going to get everything perfect in there with these. It would probably be impossible to get the bottom of the square without cutting open the bottom of the VAIS chamber and gluing it back like Tilley did.

The overhang is what I think would help optimize for no PV and that should be no problem with one of these.

 

I'd still flowbench it, just to make sure.

Reached with what though?

 

I agree...what kind of shops do that stuff?

See above....

 

Well I know of a race shop about 10 minutes from my house that does flow bench testing. Any big race shop that does machine work should have one.

 

This is worth a shot. If Neal installs his engine out here in Chicago, I've got a buddy whom has ported intake manifolds before. Might not be worth the time in Neals case since he can just increase the boost for more power.

 

I'm sure you would agree with me that the torque and horsepower curves will ALWAYS intersect at 5250 rpm based upon the mathematical equation for HP. Are these guys trying to change the point at which the VIAS activates? Also, could you please publish my dyno plot from last year. Note: It was taken before I installed the underdrive pulley and lightweight flywheel. Thanks.

 

Yes..

I believe this one is yours....



Also, who'd you have install your ES mounts and where did you go for your timing advance?

 

neal, I posted eckohb's runs a while ago. One was with the 00vi opening at 1200rpm and the other at ~5200rpm.





1: base line
2: Best overall run
3: Highest Torque
4. VI opened at 1200 rpm, just for fun

 

I PMed you...

 

This is with a JB Weld-repaired VIAS, AKA 'Power Valve'. I haven't felt the need to wire it open, remove it, or otherwise...

 

Hey guys, I just ran into this thread. The mods for my car(Nathan's runfiles) at the time of the dyno are listed in my sig. Just got the gen2 headers installed and as soon as we fix an exhaust leak, I will dyno again, with the only difference being the cattman y vs. the cattman gen2 headers. I tried the jbweld repair for the vias a couple of times and got tired of f*cking with it so I just yanked it out.