So I have a few questions about my build I am putting together in my head and plan on buying within the next few weeks here.

Mod's Current to my car:

GM stage 2, 2.9 pulley, GMPP Manifold, GMPP Exhaust, Injen CIA.

Build

I am wanting to drop down to 2.8 pulley size and add 60lb injectors, and Install a ZZP Heat exchanger(possibly dual pass), and a tune.

-Is there any other mods I should worry about getting to support this build?

-If I were to drop to a 2.7 how unsafe would that be cooling wise with just running a heat exchanger and dual pass.

-Is the GMPP manifold with stock DP sufficient to support the 2.8 or should I get a catless DP to open things up?


Thanks in advanced to anyone that shoots me advice

 

a header and dp would help alot

 

Yeah I was thinking with going with the ZZP Header DP combo, catless of coarse no emission laws here in Illinois.

 

How's the wheel hop with that??
I got solid mounts before my engine mods.
You should look into solid mounts bro you don't wanna break an axle do you haha ohh and meth injection to help lower iat's

 

One thing to note with a catless downpipe is that your exhaust is going to sound a hell of a lot raspier. I have had a lot of different exhaust systems on the lsj and no matter what they are all raspy without a cat lol.

Currently running a catless cai header and downpipe with a hahn racecraft catback and above 3k roughly there is a decent amount of rasp.

The cat only kills 2-3whp if that, but it would make your exhaust sound a hell of a lot better. If your car is a daily driver and you don't need each and every whp then I highly recommend getting a cat.

Also though a cat is a restriction of airflow and it will create more boost which is not good. All boost is, is a restriction of airflow. Boost is not power, remember that with your build.

 

I am lowered with Ingalls TD installed so Wheel hop isn't to bad, and I don't do digs very often, first gear shifts are no fun at 15lbs of boost lol. But Solid mounts are a very good idea, thanks for the heads up!

Thank you very much for opening my eyes to that.. This car is my daily driver, I drive to Stl mon-friday and its a 40-50 mile drive, but I think I could stand the rasp, and may like it ha. How much % wise louder would you say it would make things?

 

i just put on ZZPs 3" inch catless downpipe, and 3" cat back and i would say compared to stock it was ummmmmm 400% louder. lol. it is pretty raspy especially during acceleration but you get use to it and it sounds pretty bad ass.

tip- for fun i started it without the catback on and i **** myself so i wouldnt suggest it. lol

 

with the 2.7 run meth. i have a 2.8, full exhaust , intake, ottp h.e and dual pass and have a nice little set up

 

in about a month i will have a 2.8 and 60s for sale. lmk

 

How much do you want for them, because I am getting ready to send someone 115 for 60's today and 40 for a 2.8. Let me know because if yours is gonna be cheaper I am definately down

How much boost are you seeing and what HP are you sitting at?

Haha I will keep that in mind, but hot damn 400% louder! haha

 

15-17 psi car runs good. never dynoed lol will dyno with the new set up here in a few weeks tho

 

cant wait, i got 60s and 2.8 coming just need my cooling stuff and a tune

 

yeah it will do for now trust me.

and im only on a canned tune not even a custom tune and it pulls

 

Yeah I found a guy locally that travels and comes to you and tunes so Im hoping this will give my car some new found *****

 

name? zach?

 

Yessir Zach would be his name.

 

sweet i heard he is very good. he is the one sending me my new injectors so i can tune on e85 i might just have him do the whole tune and all

 

try a resonator with no cat, eliminates the raspiness and doesnt restrict exhaust flow nearly as much as a cat would. just a little fyi. fukk you can even have 2 if one doesnt cut it.

OP stay 2.8 or above, i've seen 2.8 cars make more power than 2.7s. your engine will thank you.

 

High flow cats do not restrict flow much more past ~2-3hp...

resonators are awesome..

2.7 will have a little better tq down low... but more power is more stress on the engine anyway... so its all up to you..

 

Yeah I have heard the same things and he's close to me

I'll keep that in mind! and Yeah I am not really interested in blowing up my car ha, just wamt something with a little more power, I mean my car isnt bad as it is, just want a littttttle more out of her.

 

your not gonna blow your engine because you use a 2.7 pulley...

If things are done right, a 2.7 will make more power than a 2.8... its just common sense.

 

I hear ya man, I am definately getting all the cooling mods on before I drop any pulley sizes, just don't want to get into meth right now. "Ha that sounded like I'm a druggy"

So Heat exchanger, dual pass, and option B.

Can someone explain option B to me?

 

Bump, option B anyone?

 

Option B does not offer any performance gain. It more or less is just a way to help the car bleed the air out of the intercooler system that gets trapped when you drain the coolant from the system to install the dual pass plate.

You can do it without option B, it's just harder to bleed air from the system.

I'd do a flow through box before I'd spend the money on Option B.

 

get the flow throught tank from euthanasia great guy on here. ports tb, and sc as well