Ka-T reconsidered, refresh me?

[gingerbredman]

After having sold all my ka-t parts I kinda want to do it this time now that I don't have too much financial stress.. I've got a lot of info stored in my head that I've learned here and many times I'll walk outside and smoke a cig at night looking at my car and play out everything I need in my head.. Soo I think I'm going to start over, and buy new parts, it's stupid that I duped the project after switching chassis and going with a performance clutch.. but

Anywho, enough shmuck, I got some questions, I know I should know this stuff, but I reckon I just forgot along the road haha

First off, the maf. I see a lot of setups that feature the maf in between the turbo and filter, why is this? Wouldn't it be safer and more accurate to place the maf close to the throttle body, after the air passes through the intercooler and is pressurized and all that?

Same deal with a bov (if it's atmospheric), it should be on up by the throttle body where all the pressure is, right?

I feel like I should know this.. maybe the herbie killed some brain cells

I reckon I should at least throw what I'm going for:7psi t3/t4fmic3" turbo-backWalbro high pressure 255 fuel pump8:1 FMU, brand undecided still

anyways, just talk to me if nothing else, I haven't been on here in forever

[GTR PrYdE]

Setup seems fine, but you'll need some timing retard, and as far as the maf-

Blow through or suck through- between the turbo and filter is most common, and along with a recirc'd bov it will run great. you'll have to search a blow through maf setup, it works similar but slightly more complicated.

[Doya]

The reason the BOV is put on the hot pipe side is, every time you rapidly let off of the throttle it causes like a compressor surge and puts unwanted pressure on the turbo, which can cause premature failure of the bearings and seals. The BOV vents that pressure into the atmosphere, but it is recommended that you recirculate it back into your intake.

[WDRacing]

The reason the BOV is put on the hot pipe side is, every time you rapidly let off of the throttle it causes like a compressor surge and puts unwanted pressure on the turbo, which can cause premature failure of the bearings and seals. The BOV vents that pressure into the atmosphere, but it is recommended that you recirculate it back into your intake.

His question wasn't what a BOV does, but where it should be placed. The closer to the TB the better the response will be.

After having sold all my ka-t parts I kinda want to do it this time now that I don't have too much financial stress.. I've got a lot of info stored in my head that I've learned here and many times I'll walk outside and smoke a cig at night looking at my car and play out everything I need in my head.. Soo I think I'm going to start over, and buy new parts, it's stupid that I duped the project after switching chassis and going with a performance clutch.. but

Anywho, enough shmuck, I got some questions, I know I should know this stuff, but I reckon I just forgot along the road haha

First off, the maf. I see a lot of setups that feature the maf in between the turbo and filter, why is this? Wouldn't it be safer and more accurate to place the maf close to the throttle body, after the air passes through the intercooler and is pressurized and all that?

Same deal with a bov (if it's atmospheric), it should be on up by the throttle body where all the pressure is, right?

I feel like I should know this.. maybe the herbie killed some brain cells

I reckon I should at least throw what I'm going for:7psi t3/t4fmic3" turbo-backWalbro high pressure 255 fuel pump8:1 FMU, brand undecided still

anyways, just talk to me if nothing else, I haven't been on here in forever

Retard your base timing a little and use a 6:1 FMU. I think the 8:1 is to rich.

Welcome back homie

WD

[gingerbredman]

Thanks guys, thanks WD and yeah man I'm looking forward to going ka-t finally, it may still be a while but hopefully before winter, maybe fall sometime, I'll be boosting

Another thing I thought about today, on my buddies sr I can't recall exactly if the bov is recirculated into the hot pipe or between the filter and turbo. It seems to me having it between the turbo and filter would alleviate any flutter/backspin since the air would be flowing back into the inlet of the turbo.

Glad to be back, it's going to be tough (for me) saving up to get all the parts again from scratch but I'm going to make it my goal before this year's over. Jeez I can't wait

[WDRacing]

You don't have to worry about recirulated air effecting anything accept the air fuel ratio. Which is why you have the BOV vented to return in the first place. It just needs to be returned AFTER the MAF because the MAF has already measured that incoming air and has added fuel for it. This is why you run real rich if you vent to the atmosphere, also leads to stalling issues.

Some run the MAF in a blow through setup so they can vent the BOV to the atmosphere. But I don't need the pssh pssh sound enough to do all that.

WD

[gingerbredman]

Ok gotcha, thanks again

Yeah, I'm not too keen on having a loud car either, but I'm still going to look at blow-through setups just so I have a good understanding, the thirst for knowledge is unquenchable!! haha

[gingerbredman]

Yeah, blow-thru setups aren't inquignifying to me, really

It's crazy, you read through everybody's ideas, countless pages and theories thrown around, then you have the people who have done it, the right way. All nuts and bolts ya know? Not that ole instant potaters like Carl likes, mm hmm.