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[AutoXRacer]

I had my crank bolt back off & the pulley started to work it's way off. Actually started twisting the keyway on the crank. I only found it after pulling the motor when it blew (not related). When I did my next motor I had the crank double keyed & used the longer ARP crank bolt so it wouldn't happen again.

So what balancer do you run with your double key?


So I hate to bring up this awful subject, but it came up when I was checking out on of the local machine/engine building shops.

A comment was made that having vacuum though the PCV system allows much better ring seal.
But that with these motors, a lot of oil is sucked into the intake, which at my power levels is not desired.

So, where does one stand? I want better ring seal, but don't want the oil.
According to the shop, with a blower motor, you are always going to have blow-by.

I really don't want to get into the whole adding an electric vacuum pump and all that jazz. I just have no room for it in my engine bay.

So whats the deal? Is there really that much to gain with vacuum in the PCV system/shortblock?
The shop kept saying you can make a lot more power with vacuum present.

Has this even been proven?

I frankly hate this subject...


Also after the conversation, seems like I will be doing a full rebuild.
Although, the shop does agree the failure most likely is isolated to the heads. But since I am partly there anyway, might as well just rebuild the block. Plus, in order to inspect it, you need to pull the pistons to see how the rings wore and by that time, might as well not put the old parts back in.

 

[stkjock]

So what balancer do you run with your double key?

IW or ATI

 

[AutoXRacer]

IW or ATI

One better than the other?

ATI seems to be much cheaper than IW...

If I understand correctly, ATI uses rubber while IW is fluid?

Pros and Cons?

 

[stkjock]

IDK enough about them to give you a answer. I have a IW (was on the car) and IMO it looks cooler than the ATI

 

[AutoXRacer]

IDK enough about them to give you a answer. I have a IW (was on the car) and IMO it looks cooler than the ATI

How many miles running the IW? Power? RPM?

 

[stkjock]

How many miles running the IW? Power? RPM?

I have 7000 miles on it, but I would guess it's been on the car for near 10K, 775whp, 6700-7000 rpm has been seen.

 

[BruceH]

Gerald,

People do different things. I know that you went over this about a year ago when you were deciding on using breathers or not.

I like having a pcv system. It's never done any harm imo. It also keeps those pcv gasses out of the cabin. I remember the good old days when we had breathers and I like modern cars and technology much better.

 

[Fabman]

I have an oil separator to keep the negative pressure of a PVC and still keep the oil out of the intake.
Not sure if you have one of these already or not....

http://www.cjponyparts.com/jlt-oil-separator-driver-side-kit-gt-2005-2010/p/OILSEP15-V/


EDIT: This isn't the exact one I have, but you get the idea.

 

[AutoXRacer]

I have an oil separator to keep the negative pressure of a PVC and still keep the oil out of the intake.
Not sure if you have one of these already or not....

http://www.cjponyparts.com/jlt-oil-separator-driver-side-kit-gt-2005-2010/p/OILSEP15-V/


EDIT: This isn't the exact one I have, but you get the idea.

I've tested these in other vehicles, even this Mustang with the stock motor and you still get oil in the intake.

My concern is when you are pushing a motor to the limit with pump gas...oil in your air/fuel mixture is no good. You need every point of octane possible.

How detrimental is it to run open breather/catch can breathers?
How much HP is lost?
How much seal do you lose?

 

[skwerl]

Just run a good catch can (something better than JLT). I ended up running two JLT cans in series, the second one catches just as much oil as the first. The little bit that still gets through isn't going to hurt a thing.

I swear, sometimes you get so hung up on the silliest little things. Understanding how things work and being proactive to avoid future issues is good, but sometimes you have to watch out for analysis paralysis.

 

[Fabman]

Just run a good catch can (something better than JLT). I ended up running two JLT cans in series, the second one catches just as much oil as the first. The little bit that still gets through isn't going to hurt a thing.

I swear, sometimes you get so hung up on the silliest little things. Understanding how things work and being proactive to avoid future issues is good, but sometimes you have to watch out for analysis paralysis.

The JLT ad says to run them on both driver and passenger sides.

 

[AutoXRacer]

Just run a good catch can (something better than JLT). I ended up running two JLT cans in series, the second one catches just as much oil as the first. The little bit that still gets through isn't going to hurt a thing.

I swear, sometimes you get so hung up on the silliest little things. Understanding how things work and being proactive to avoid future issues is good, but sometimes you have to watch out for analysis paralysis.

You are talking to one of those analytical types... I analyze things to death... lol

I think I need to further investigate these: http://www.saikoumichi.com/OCC_page.htm

And especially this one: http://www.crawfordperformance.com/...-oil-kit-for-oem-turbo-fmic-version-2-08-sti/

Although the bugger about the one above is you need a return line to the oil pan. Unless I can setup a catch can setup that I can be drained...???

 

[ILW84U]

So what balancer do you run with your double key?

ATI

 

[Gray Ghost GT]

ATI

 

[AutoXRacer]

I am going with Innovator's West.

ATI does not make a balancer that has an intergrated supercharger pulley hub with replaceable rings for dual belt blowers.

 

[AutoXRacer]

What do yall think about this??? Jim???

A pan-evac system???

Fit the header collectors with this:
http://www.jegs.com/i/JEGS-Performance-Products/555/30739/10002/-1?parentProductId=1426756

Add a check valve:
http://www.jegs.com/i/JEGS/555/52211/10002/-1

And use it to pull vacuum out of the bottom end...?

This solves the lack of vacuum in the bottom end, eliminates the need for a catch can/breather setup, and the nasty fumes.

 

[Fabman]

What do yall think about this??? Jim???

A pan-evac system???

Fit the header collectors with this:
http://www.jegs.com/i/JEGS-Performance-Products/555/30739/10002/-1?parentProductId=1426756

Add a check valve:
http://www.jegs.com/i/JEGS/555/52211/10002/-1

And use it to pull vacuum out of the bottom end...?

This solves the lack of vacuum in the bottom end, eliminates the need for a catch can/breather setup, and the nasty fumes.

It works. Drag racers have been doing that for decades.

 

[AutoXRacer]

It works. Drag racers have been doing that for decades.

Does it work on a street car?
Why do we not hear about this on late model cars like ours?

Would it work with catalytic converters?

 

[Wild White Pony]

Seems like a nice way to get vac only when you need it and without worry of mechanical pump break down, but the not for use with mufflers?

Would you think if you had mufflers you could get back pressure when letting off a WOT that could overload the check valves ability, that would prolly be a bad day otherwise I like that setup. May get that anyway to hook up a wideband.

 

[VectorPat]

You get too much back pressure with mufflers and it wont work.