I didnt want to highjack Jer's thread...AGAIN.... so i started this one.
It was wierd the car wouls see 5 psi and soon as it was floored @4500 rpm's and creep up one more to 6 around 5500 and then around 6200 it would build 1 more to 7 psi total. With all my other setups before i would build boost to start, then it would dlowley climb and in the last say 600-700 rpm's boost would rise considerably... at least 2-3psi at peak rpm...... There was no belt dust. I am thinking a coupler is loose and its letting boost build and when it reaches so high it bleeds its self off....... The rubber piece between my plenum and 85mm MAF did swell up and on the last run blew off........ Heres the graph and let me know what you guys think.



Tommy... i tried calling your work 3 times...... i have new info... call me
Kyle

 

My cog graph looked like that one, but I saw 13psi on the mechanical boost gauge. The problem with mine was the tuning, I had about 14deg of timing, no fuel between 2800-3800, then the maf maxed out and went real lean. I will scan my graph and send it to you. Its creepy how similar they are.
J

 

Damn........... Im sure i have a leak..... im going to order some new couplings from ATI and redyno... i know i wasnt seeing any slip and i really want to see what i can do with this pulley...... my tune is safe so ill be ok.... my A/F was like 11.5/1 to 11.8/1
Once i see what boost i see with this pulley and i am still not happy i can change pulleys........ there cheaper from SDCE so a new pulley and belt should only be about $115 and my time..... or i should say Tommy and My time..... what does everyone else think?
Kyle

 

I think you may have some leaks somewhere, its normal for the hoses to baloon up a little - you should se the plastic ATI plenums, I wont even stand next to them on the dyno because they look like they are going to blow. I also think its more tuning issues.

Belt slip on the dyno is usually pretty obvious, power drops right off since the boost usually peaks then drops, not keep climbing.

What was your timing on those pulls, was the converter locked or unlocked?

 

I believe timing was at 22 degree's
Kyle

 

is that what it was on the pull or what its set at?

The graph almost looks like the converter is unlocked since it shoots up pretty quick. That will skew the results pretty bad on the low end if you have a loose converter.

You should lock the conveter and start at a little lower rpm if you want a nice looking graph..

 

Here is a graph of belt slip


It peaks and then nose dives like a ****, man I wished it kept climbing. That was with the MMS and 3.2 combo.

 

Now thats a belt slip graph

 

I aim to please(stole that from dirty)

 

Kyle did you watch your boost guage?

for me at least when I would see belt slip with my powerdyne the boost starts to climb then hangs, drops, goes up a touch, drops, back up a touch, etc...

when I had leaks via my couplers it just wouldn't make peak boost. It would get to a level and stay there. thats why I think you have a leak or multiple leaks somewhere.

 

if he is dynoing with an unlocked converter the boost will shoot up until the rpm starts climbing. If he is dynoing unlocked (which it looks like he is) the low end HP is way higher and the graph will tend to look a lot flatter. Not to mention he is losing ~25rwhp if its unlocked, that plus I bet its rich up top and you can run more then 22 degrees with that little boost on a low compression motor.

He may have a leak somewhere but I doubt thats the main issue.

 

does your dyno support boost logging?
on my graphs, the is a boost line with A/F line.
ask your shop if they do, it'll tell you definatly is you have a boost leak/belt slip.

force fed, copyright dude, copyright!

 

Just like you said in your last sentence Heath.......
It goes to a level and stays there......

Took the front Facia of tonight to see how big of FMIC i can fit and it looks like i will be going with a 24"L X 3.5"W X 12"H
I forgot how small those ATI Intercoolers really are.




and this is my new dog....... on the internet

I wonder if they will let me take my dog with me down the 1/4???

Kyle

 

Nice dog

Get a griffin like PSJ, I know that fits

 

Cool dog Kyle... We found them in a ditch down from Tommy's street and saved them!!!!

 

Kyle you have a leak is that ATI blowoff flapper still in play on your car? That could be your big problem I have seen those blead off several PSI. You need some new hard pipes.

Oh and Gamble what did you save the intercoolers or the pup?

Nate

 

What kind of dog is that?

You removing your front bumper support?

 

Here some pics of our hard pipes we just did.

Nate

 

PSJ, they are mix part pit and something.

NASTY, we saved the puppies you need a good dog there are 5 more lol!!

 

now those look awsome.