well i understand what you mean, track times is what counts... but thats actually what got me starting this whole thread yesterday... was because I had just gotten beat down by a lightning with ALOT less mods than me... hes not lying, i know for a fact what he has... and he showed me his time slips and his best time to date was 8.5.... so even if we threw out the HP numbers and consintrated on times... well, i juts got beat down by a 8.5 truck.... i dont think thats right either..... not considering my very very very first run EVER at any track, before half these mods, i personally ran an 8.6... so thats saying, iv gotten better, and added a bunch of stuff.... and still got beat by 8.5 truck....

 

What kind of Dyno is it? It seems both trucks are
modded about the same, so maybe everything is
OK.

Changing from the stock exhaust loses torque imho.

 

might be stupid but have you checked your plugs?

 

no, i havent checked the plugs... would that actually cause loss of power??

ok, now here is another chart I had him print off yesterday... these are the actual numbers, not the SAE numbers....

Blue is yesterdays pull AFTER port, ftvb, throttle body and reburn
Red is a while back BEFORE port,ftvb,throttle body,reburn

it was a little cooler day on Red, but im confused....even with actual numbers... shouldnt I be over 401??

also, check out my torque....

 

By the looks of your HP graph, you can tell that you have the ported blower on - the curve hangs for a longer time in the upper RPMs.


But you do seem to be quite a bit down on power and torque. If you don't feel a misfire, your plugs are most likely OK, but pull them all to be sure. It can't hurt, and it'll let you know how the truck is running by the color/condition of them.

Good luck. I know its frustrating. I went through similar things when I had a 6# lower on. Was running .5sec and 4 mph off what I ran with only a 3# lower in the SAME temps/conditions. For me it was the tune, and a LOOSE PLUG!

 

well, iv never done the plug change... have been putting it off for a while.... but guess I outta just do it too....

currently I have the denso it20... should I move up to the it22 or what are those other cheaper ones alot of others are using... am I ok with those??

 

Save yourself some $$ and get the BR7EF's ...They're perfectly fine, and more durable than the IT's...though some may argue the point.


It's only like $1.40 a plug for the BR7EFs

 

Scott sometimes when I am just lost on a problem I start at square one.

Just go get under that hood and throw out all the perceptions you might have formed by now. Just go back and cover each and every little detail. Check for all gaskets, bolts, vacuume lines ect, proper belt tension, proper upper pulley, ect.....


Ok now my "perception" based on all these posts & replies to date: Check (or have checked by a pro) that your boost valve / butterfly is operating properly. And I'm not so sure I'd base "psi" numbers on the stock guage. Let alone one that has had it's supply line messed with.

Oh and you did'nt say who ported the blower... That's fine I'm not asking you to say who did it. But does it's outlet look very close to some of the "name brand" services?

Rich

 

im getting my 12psi reading on my autometer guage on my tri pod

and i have the WASP ported eaton

he said its an apten replica... i dont know what apten looks, like but here is a pic of mine.... it seemed to be a VERY proffesional job... on quality i give it an A++

 

Well, here's my take on it...

First, it's obviously not the tune. If anything, the A/F is a tad on the lean side, which at the point it's at, would give you more hp, not less.

Second, your current numbers seem about right for your mods. Remember, your truck is a 2000. You started with about 320 rwhp, NOT 350 rwhp like an 01-up. All you have for power adding mods, is the tune, 4lb, TB and port job. The average 99-00 with just a 4lb, TB, and tune makes about 360-370rwhp. Add about 25-30 rwhp for the ported Eaton, and you are just around 400. If anything, I'd say your current numbers are more correct, and your previous dyno before the Eaton seems high.

Third, as far as the torque goes, it's common to lose torque with the port job. I've seen it on many customer trucks, with both the Apten and Wes port jobs. The trucks make about 20 ftlbs less at low rpms, but the hp increase over the rest of the rpm range more than makes up for it.

Forth, as far as your boost, I don't think you are too far off. With a 4lb, some trucks see 11-12, some see as much as 14. The port usually adds 1-2 psi over that. You could be low on boost. As mentioned by others, I'd double check that bypass valve.

That's about it for now till we get more info.

 

well this weekend im gonna change out all the plugs, check the boost actuator and check the blower to make sure the butterfly is closed and is hard to move (is that correct)

then make sure when I put it all back together its good and tight... sealed up...


then if its still the same... i guess thats just where i sit??? maybe check my SC belt too, make sure its not slipping...

another thing... people keep saying the 01+ come with more HP... i heard they have 380 and i started with 360.... but then again, i was also told the only thing they have different is the 90mass air and 3.73 gears.... is that correct? cuz i have the 90 mass air, just not the gears

 

well not much else to talk about I guess until after Iv done all this.... im gonna try and get new gaskets for the supercharger just to make sure they are good....


by the way, is now a good time to clean the intercooler??? i didnt clean it last time.... would take make any noticable difference?

 

Here ya go Scott..............maybe you missed this post. Your where you should be on H.P./Torque

Now relax....and just enjoy the truck.

Rocks

 

SO what about my 2003 that has the same numbers as him (besides the A/F ratio)? Should I have 20 more HP than him since I started out with 20 more stock? That would put me where I want to be at 415hp...

Again the only "power adding" mods I have are:
-Ported Eaton
-4# Lower
-Ram Air/Cold Air kit
-Predator custom tune

 

It's a dynojet. Ya we are very close on the mods we've done. Only thing is that I KNOW that I have a safe tune because of my A/F ratios in the 10s, my timing is still at 14 degrees, and I had Johnny tune it for 91 octane (because that's what I thought I was running, but I'm actually using 93). So I think I can up my tune and I'll hit the numbers I want, but without a boost gauge I'm not sure if I'm getting the same low boost as Scott.