Converted to blow through

I didn't like the fuel trim swings associated with the stock draw through set up on my Paxton. The solution was to go blow through for more accurate maf function.

First the coolant tank had to be moved to allow enough room for the discharge tube. I went with a Canton tank.



Here's the 3" tube with a hpx maf. Had a local guy weld the flange for this and the mondo, cost $35.



The mondo blows alot of air at idle. Right now I'm digging the sound but it could get old fast. I may route a 2" hose with an air filter to quiet it down some.



Put together a replica "Power pipe". It's been well documented on this forum how to do it. Bigray, Lightblade and Greg Hazellet come to mind off hand. I'm sure there are others too. Having this forum for research is invaluable.

All I had to do was get a 3.5" to 4" 90 degree reducing elbow. Cut about 1" off of the 3.5" side and connect it to a 4" 45 degree elbow. Reused the air filter.



The last detail was what to do with the passenger side pcv line. I put a breather on the hose and stuck it down here until I figure out what I want to do with the whole pcv system.



I used the ba5000 value file for the hpx meter. It uses the same values as supplied by pmas. The test drive revealed it's real close. Fuel trims are good and I'm not touching the maf xfer until I get it wot on a dyno. I'll bet there won't be any need to adjust.

Looks good bruce!

Nice work. We have very similar setups.

Looks great Bruce. What's next on the list ;^)

Thanks for the compliments guys.

Marc s said:

Looks great Bruce. What's next on the list ;^)

Click to expand...

Still deciding if I should put this 3.6" pulley on. If I do more than likely a set of 4.10's will go in. The 4.56's are almost too much with this setup. I was unintentionally breaking the tires loose in 2nd today on the wet roads. Driveability first.

The first thing to happen will be a filter on the bov. People are turning their heads half a block away. I drove around with the window down for awhile and it sounds like an axle bearing past it's prime. It was cool for a little bit but I'm over that now, lol.

When is the next dyno day going to be? I'd like to get it on just to verify the af. Looking at the fuel trims I think it's going to be dead on.

BruceH said:

Thanks for the compliments guys.




Still deciding if I should put this 3.6" pulley on. If I do more than likely a set of 4.10's will go in. The 4.56's are almost too much with this setup. I was unintentionally breaking the tires loose in 2nd today on the wet roads. Driveability first.

The first thing to happen will be a filter on the bov. People are turning their heads half a block away. I drove around with the window down for awhile and it sounds like an axle bearing past it's prime. It was cool for a little bit but I'm over that now, lol.

When is the next dyno day going to be? I'd like to get it on just to verify the af. Looking at the fuel trims I think it's going to be dead on.

Click to expand...

Dyno days will be the last Saturday of every month.

BruceH said:

The first thing to happen will be a filter on the bov. People are turning their heads half a block away. I drove around with the window down for awhile and it sounds like an axle bearing past it's prime. It was cool for a little bit but I'm over that now, lol.

Click to expand...

Id like to hear that. Vid, please?

Very nice.

FalconGTHO said:

Id like to hear that. Vid, please?

Click to expand...

Just go turn on your vacuum cleaner.

Bruce, I did the filter thing and it barely helped at all. I think I made a few posts about it, with pics. I found out that the only real noise reduction you get is by a) adding some length of piping, and b) filling the filter with air cleaner material. I ended up with the filter on the end of 2 feet of hose.

Good luck. Can't wait to see what you come up with.

Very cool. Is the ba5000 value file included in Pro Racer or did it come with the MAF you purchased?

Swarzkopf said:

Very cool. Is the ba5000 value file included in Pro Racer or did it come with the MAF you purchased?

Click to expand...

Both. The file that comes with the maf is on a spreadsheet so it would require copying all the parameters in. The maf file on pro racer just required a mouse click.

Marc s said:

Dyno days will be the last Saturday of every month.

Click to expand...

Nice work Bruce. As usual.

So there is a dyno day this sat the 29th? I still want to get this BAMA tune checked.

Wow that looks great. Where did you get the coupler and pipe from? I had a draw thru Vortech setup (A/W) and have been thinking about doing this.

BruceH said:

Both. The file that comes with the maf is on a spreadsheet so it would require copying all the parameters in. The maf file on pro racer just required a mouse click.

Click to expand...

i think they sent me a disk when i got mine, i could find the file if you want...maybe

Thanks again for the compliments guys.

HEMI LOL said:

Nice work Bruce. As usual.

So there is a dyno day this sat the 29th? I still want to get this BAMA tune checked.

Click to expand...

Turns out they aren't going to start till the 26th of November.

max2000jp said:

Wow that looks great. Where did you get the coupler and pipe from? I had a draw thru Vortech setup (A/W) and have been thinking about doing this.

Click to expand...

www.siliconeintakes.com IIRC it was around $60 shipped for the pipe and coupler.

one eyed willy said:

i think they sent me a disk when i got mine, i could find the file if you want...maybe

Click to expand...

I have the disk, values are the exact same as sct ba5000. Thanks anyway.

So I know this is a dumb question but would a stock maf sensor work with this set up and a mafia ? I'm starting the conversion on mine in about a week

Yes u can use a mafia with the stock sensor. That's how I had mine set on "2"


Sent from my iPhone using Tapatalk