Purchased a CB Turbo "What Next?"

[Takedown]

So I took linc's advise and went out and purchased a Cherry Bomb Turbo exaust setup. I will hopefully be able to install it sometime this weekend or next week to see how well it sounds compared to stock exaust. Im now wondering what I can do for performance budget upgrades? Im looking into replacing the stock exaust with 3in exaust for less resistance to the exiting exaust. Im also looking into a k&n intake setup. Any other ideas?

[lincpimp]

Synthetic fluids.... 5-10hp at least...

[JThiessen]

What size of motor do you have in that? IMHO, going to a 3" exhaust for anything other than a diesel or a big block is actually going to decrease your backpressure enough that you will loose torque.

Best budget bang for the buck is a programmer if there is one made for your vehicle.

[lincpimp]

A 2.5" exhaust will be plenty...

[Takedown]

Yep I plan to run synthetics no doubt. Its a 1989 saab 900s.

[kulangflow]

Originally Posted by JThiessen

IMHO, going to a 3" exhaust for anything other than a diesel or a big block is actually going to decrease your backpressure enough that you will loose torque

Unless you have a turbo, right? I've heard arguments on both sides, but the majority leaned toward not needing the backpressure as much if you had a turbo. Not positive myself though.

if its turbo 3 inch will be what you want the turbo actually acts as a muffler and creates a bit of back pressure

[ZippyBasher]

Cold Air Intake, a Larger Throttle Body, Tuner.

Or best bet would be all 3... I hope soon to add these 3 things to my '08 Pony...

Ditch the K&N idea and get something with a larger Maf Housing.

[squeeforever]

Originally Posted by kulangflow

Unless you have a turbo, right? I've heard arguments on both sides, but the majority leaned toward not needing the backpressure as much if you had a turbo. Not positive myself though.

Its not exactly backpressure you want but more velocity. More velocity = faster spooling turbo.

Originally Posted by cheesecake

if its turbo 3 inch will be what you want the turbo actually acts as a muffler and creates a bit of back pressure

Not exactly. Exhaust size if turbo would depend on the size of the turbo. Its true, a turbo does kinda act as a muffler and create back pressure, but you want velocity. You won't get velocity with a huge pipe and small turbo, you'll just get turbulence and a slow spooling turbo. Of course most of this is affected by the placement of the turbo. Chances are you wouldn't even be able to change anything before the dump pipe so it doesn't matter all that much as if it was something like a STS rear mount turbo. Exhaust is a tricky thing with the turbo at the back (as me how I know ).

the avatar that squee has is really giving me a headache....

[JThiessen]

Originally Posted by kulangflow

Unless you have a turbo, right? I've heard arguments on both sides, but the majority leaned toward not needing the backpressure as much if you had a turbo. Not positive myself though.

Originally Posted by cheesecake

if its turbo 3 inch will be what you want the turbo actually acts as a muffler and creates a bit of back pressure

Geez...not sure how or what to respond. I'm in no way an expert on gasoline turbo systems, but I researched the crap out of my diesel system before I put anything on it. Its all about achieving a volumetric balance. Stuff in = stuff out. All these variables are part of a system, and without evaluating the system as a whole, you are throwing darts at the wall. If your intake system has the ability to put in more air than your exhaust can evacuate, them you need to change your exhaust. Most of the time this does not occur unless you have increased the induction system (ie. larger turbo, different cam profile, and actually achieve increased volume flow into the motor).

In the diesel world, one thing people do is they go and stick a 5" exhaust on, and drive around thinking they added 30 hp to their truck. 99% of them never bothered to look at the items they didnt replace - the Catalytic converter, and any of the components between there and where the collector on the exhaust manifold is. Any increase in your exhaust size over the smallest point in the entire system is generally a waste, HP wise. You are better off paying for a higher quality exhaust that has smoother mandrel bent bends than going bigger.

I've found that in lieu of buying a complete new intake system, you can purchase a high flow stock replacement filter, and mod your filter box with a dremel and a hole saw to increase air flow into the box. I've also seen guys use PVC pipe to make a smoother inlet pipe (from box to the turbo inlet). One thing you want to watch is to not create turbulance in the air at the turbo inlet. Some people have claimed to have good luck with a device that looks like a honeycomb that goes right in front of the turbo - it creates laminar flow of air into the turbo. I dont know if there are similar items for gasoline turbos or not, or if you guys would even need it at the low boost levels you see.

On edit....squee beat me to it....drat!!!!