hungryhip-ccp

iTrader: (2)

ok so this is kinda wierd but i think i know why...

so yesterday i went to the dyno at R&E Racing

my mods: AEM UEGO A/F, EBAY CAI, AEM DRY FILTER, AIS METH INJ, 42.5lb INJ, ZZP HEADER, 3" CATLESS DP, CUSTOM CUT & WELD TRUE 3" TI CAT BACK, FLO PRO RESONATOR, MAGNAFLOW MUFFLER, NGK IRIDIUM 2 STEPS COLDER, GM 2 PASS INTERCOOLER END PLATE, ZZP PCM

first run...

2.8 pulley, 80%meth 20%water= 242whp 219wtq 11.3-11.5 afr 17lbs boost

second run...

2.85 pulley, meth= 244whp 222wtq 11.5-11.8 afr 16lbs boost

final run...

stage 2 pulley, meth= 256whp 224wtq WTF 11.2-11.8 afr 14-15 lbs boost


how can this be? i made the most hp on the largest pulley!

zzp website

1. We do not recommend smaller than 3.1" pulleys without extensive exhaust mods. Our header/downpipe combo is very effective for running smaller pulleys.

2. As a general rule you will make more top end HP and have a safer build by being conservative on the pulley size.

3. With our PCM, and supporting mods, it's quite easy to make 250WHP with a 3.0" pulley.

4. Any boost levels over 15-16 psi indicate that supporting mods such as an intercooler upgrade or exhaust upgrade would be better than running a smaller pulley.



so basically they were right on the money... now it is important to take in consideration that i am running thier tune... and someone elses tune with smaller pulley may generate more hp... but i am also running all their products reccomended and my tune is for a 2.8 pulley??? so why didnt i make more hp even with thier reccomendations??? the stock m62 is probably out of its effecincy range and the smaller pulley over spinning the blower is my loss in hp (thats what i think) see link http://www.magnusonproducts.com/images/mp62g2.jpg
that is when the bypass valve is open, (blower not working hard) i couldent find one of it with valve closed...

just goes to show that all the newbs out there slappin on 2.8 on stock exhaust and no cooling mods and thier car is slower and on the verge...

another thing i would like to add is that... at no time did my afr go crazy, erratic, lean... nothing even with 2.8 on 42's but i was not monitoring idc which were probaly threw the roof... i did have a band aid fix and that is the meth is adding fuel with the 3gph nozzle at 185 psi

conditions 2500ft altitude 90deg ambient temp humidity got cut off when printing
let the comment and question begin...

light'bolt

did you mean largest pulley??

SlowBalt_06

iTrader: (-1)

your probly not knocking with the stage 2 pulley so your not pulling timing and your 42 lb injectors are not going static

hungryhip-ccp

iTrader: (2)

thanks. edited...

not knocking at all on any run! and if inj went static i would see in the afr log... meth ftw anymore ideas?

Area47

prime real estate forsale page 1!!!!



fact. they are not right on the money

SlowBalt_06

iTrader: (-1)

and can tunes never help...you should just have someone with hptuners tune you

QuikSilverSS

Sounds screwy....you made more hp with the stage 2 pulley than with the 2.8" plus you made less Tq with the 2.8 on? wow thats weird!

However you were leaner with the larger pulleys than with the 2.8, try commanding the same a/f ratio on all the runs and that maybe the difference.

why a 80/20 mix? The best for cooling is a 50/50 mix anyways. Plus will provide you more than enough Octane to run high timing?

Can you share the pics of the 3 dyno runs so we can compare?

USMCFieldMP

iTrader: (1)

Good Numbers... My Stg2 #'s own though.

hungryhip-ccp

iTrader: (2)

i only got copy of best one and its not a graph like most its a bunch of lines on paper stating results rpm by rpm

Acidangel_5.0

not reading all that.. but blowr heat + tunin is your answer

light'bolt

What is the RPMs at each of the Peak HP? I'm not sure on my thinking but my guess is that you peaked at different RPM levels. If your peaking too early with the smaller pulley then the answer may be there. If the HP peaks at the same RPMs then my guess is wrong.

I still haven't quite mastered all the tuning knowledge you'll need someone with more tuning expeirence to really explain.

invisible

That sounds about right. Saturday I got tuned with a 2.8 60's meth and cobra heat exchanger and my IAT2 were 30ish lower than dvs's cobalt with a 2.7 and meth. Also made about 15ish more hp than he did.

hungryhip-ccp

iTrader: (2)

another useless post by the master of nothing... lol

Originally Posted by Area47
a cheap way of richening it up is restricting the filter itself.

remember that... you must of done it again, you know... farted out your mouth lol


not trying to be a dick at all dont take it that way... and not trying to say i know everything i still appreciate your help......... but your not helping



i know i know ive been threw that already... but im not spending 500+ on hp tuners to get maybe 20hp... i have nos for that... i am trying to work with what i got... and its a hell of alot better than the stage 2 tune thats for sure

LamboW9

iTrader: (3)

Area47 is one of the more knowledgeable guys on this site as far as tuning and such...if he's tryna help be it sarcastic or not he's still helping....advice is pm him an ask wat he means if your confused

Werewolf SS

Hmmm 2500 altitude?

Come to Florida, Those numbers would be much better down here (0 to 200 ft altitude across the state)

As for the 2.8 making less power this is interesting.

hungryhip-ccp

iTrader: (2)

what are yours? care to post or just wanna brag? lets make sure you dont forget to post the conditions and mods either, beacause those are actually great #s for the altitude and the temp!

i know ive been around long enough to know that he also like to throw in bullshit comment that mean nothing like foonani ninja and thread jack all the time... he needs to stay in the lounge were his small talk belongs

hear that area47? well i wouldent want you to think i was talking **** behind your back...


i have some retarded ass posts he made... telling me to richen my afr by restricting the air filter WTF R U KIDDING ME...


yes we all make stupid ass coments but he's been around long enough to know better... and hes made a minimum of 50 posts in my threads in which he has offered nothing but bull **** comments... he can keep his small talk to himself in my threads or he's gonna hear from me...

this thread was meant to show the newbs to be conservitive on the pulley size and not go crazy...

USMCFieldMP

iTrader: (1)

263whp w/ 238wtq

Mods were:

Fujita CAI, Stg2 w/ 2.79", GMPP Header, XTC 2.5" dowpipe w/ High-Flo Cat (Empty), GMPP Performance Cat-Back... I think that is it for performance mods at the time.

It was dyno'd in Columbus, Ohio in April last year - about 75* F. It was a very rainy day and they had kept the Shop Doors open... so I would assume that high humidity came into play as well.

hungryhip-ccp

iTrader: (2)

great #s what was altitude i think thats were im losing my power! and im only 6hp away so i wouldent say owned...

USMCFieldMP

iTrader: (1)

Altitude is 770ft

And you have Dual Pass, ZZP Tune, and Meth...

I was straight Stg2 with a 2.8", intake, and exhaust.

I've now been tuned and look forward to going back to the dyno. The tune made a 5 car difference from 40-120... so I'm guessing that I'll be over 270 for sure. Now I just need a Dual Pass... and I think I might use some spray.

hungryhip-ccp

iTrader: (2)

1. dual pass: does nothing for a dyno run... helps prevent heat soak (assuming neither of us were heat soaked while on the dyno)

2. zzp tune (you got me there)

3. meth is if anything hurting me... ( i am not tuned for it makes me run rich and safe no kr)

so basicailly just the tune which i think kinda sucks... it seems to be similare to the stage 2 tune (not very much timing at wot only like 16deg and kinda rich everywhere) it just has the benifits of the speed limit removed and the tourqe limit removed...

when you say you got tuned, did you get 60's? or are you still running 42's? if so i would be curious to see what you put down on 42's and what the idc is? you should be around 265-270is to the wheels, thats alot if you think about it... your pushing the 310 flywhp mark which is the limit of the 42's according to GM QUOTE

The Stage Three kit also puts you at the limit of the fuel injectors. With Stage Three, you need to be extra careful about keeping your fuel system (fuel filter, fuel pump, injectors, etc.) well maintained because even a minor issue could cause a lean condition. If you work through our ‘rule of thumb’ fuel injector calculation tool at 310 horsepower supercharged, you get a required flow of 58 lbs/hr. The production injectors flow 55-60 lbs/hr. As you can see, you’re right at the limit with Stage Three.

im trying to stick with 42's... and get a custom meth tune... but i cant find anyone within 100mi to tune me...

Area47

::sigh::

the post you "quoted" means dick in this thread anyways.

the answer is in the tune itself. if you can not use the added airflow wisely. it will not gain you anything. compensation for the meth, and the pulley must be throw into the equation.

my personal tune on 42's netted 273 with a 2.8, but there is a catch. dyno numbers vs street numbers. 273 is pushing the 42's really hard. to the point where they lost control and i pretty much just winged it above 6400.

you wanted an answer? there ya go.

Area47

every car is different.

you CAN NOT compare two cars. "i have the exact same mods" but you don't have the exact same engine.

hungryhip-ccp

iTrader: (2)

thank you... so i just have to stir you up a little to get you to reveal the goods...

this is very true...

Area47

not really. i just find it more fun to drag people along for no reason


im easy, but im not cheap

M-Dub

Area tuned my car for a 2.85, 42s, GMPP header, ZZP downpipe, 2.5" magnaflow, water/ meth, and an intake and netted 262 hp and 243 tq....

So it's all in the car man, everyone of these motors are built different, your reasoning behind more power on the smaller pulley.... LESS HEAT+ LESS KNOCK = MOAR POWA'

Statement of the century!