5FOX3

Alright, figured id ask before I end up needing to order a new set of rings. As title states I have an L33 that's gonna get fed with boost on the stock bottom. What should I open my rings up too? Its getting a pt88 clone (don't hate me for the turbo lol)

I was thinking .028 for the top and maybe .030 for the second ring? Its gonna see 20lbs from day one and if its a slug possibly the bottle to get it rolling...no more then a 125-150 shot if needed. Rings are standard set of mahle replacements with fresh re honed cylinders. Thanks for any input!

A.R. Shale Targa

iTrader: (2)

20 pounds on day one means 30 pounds when the desired number is adjusted
I'd go .026'-.028" primary and .034" secondary
Run a crankcase vac pump......good ones are somewhat pricey ($800-$1000)
but the improved ring seal is worth plenty of power on highly boosted applications

5FOX3

Offta...maybe I should have stated this will be my first car build....so its gonna take plenty long enough to get used to a 700ish whp car I feel. But ill look into the vac pumps!!

A.R. Shale Targa

iTrader: (2)

I understand where you're starting is 900 flywheel horsepower where the vac pump will easily be worth 40-50 horsepower.
This will not only represent the difference between 9.0's vs. mid 9.20's, but the added piston ring longevity will go a LONG way towards reducing oil blowby which can cause detonation and ultimately piston/engine failure
My point is EVERYONE with boost turns the wick up; please give your combo a fighting chance to eventually make 4 horsepower per cube instead of only three

5FOX3

Alright. That's why im asking, I know my dad hasn't dealt with anything like this or id be asking him. What is a good vac pump set up to go with? seeing as ive never dealt with one. Thanks for the input, it is greatly appreciated

A.R. Shale Targa

iTrader: (2)

Aerospace components makes a really nice kit
Others will swear by the Moroso
The object is to eliminate crankcase pressure which flutters the rings
Ring flutter ultimately reduces sealing the nasty on the north side of the slugs

5FOX3

So the pump just sucks out the crank case pressure and throws any extra oily mix into the catch can?

5FOX3

My plan is to run turbo front and center. And twin divided 4in exhaust right off the housing exiting in the front fender area.
Now could I run two 3/4in lines from each valve cover to a 45 degree intersection at the exhaust and use the exhaust as a vaccum per say to suck the excess out? Or will that not do the job? Running the car on 10-12 lbs from the get go is an option too until I have funds for a vac pump. Just throwing ideas out there

A.R. Shale Targa

iTrader: (2)

The exhaust type vac systems usually only work with open header high rpm drag/circle track and are less effective although being NA
One single -12 off the driver's cover is sufficient and instead of dual exhaust off your turbo; a single 4" or 5" will save nose weight

5FOX3

I know I could save weight. But if I end up in a st car class when I get to that point dosent the exhaust have to exit behind the firewall? If so just for that I planned on v banding both sides and having a set of pipes to run and dump by the trans. Not to concerned abut the weight either. I want it how I want it ya know.

My dad brought up the idea and said he used to do that back In the day and said ask and see what people think. But would 10-12 lbs be okay tell funds are sufficient for the pump? I haven't drove my car in over 2 yrs and im itching. I swear I wont turn the wick up and wreck it and go for it without the pump haha