Just finished my VNT install!! - Page 2 - PeachParts Mercedes-Benz Forum

Deni · #16 07-31-2008, 08:17 AM

Quote:

Originally Posted by Bajaman

Can everyone see them now?

I can now! Thank you!

winmutt · #17 07-31-2008, 10:39 AM

What are you using for the air filter Fram? Nice setup, I will almost certainly be doing this soon. What did you do for the exhaust?

So the VCV increases vacuum as the pedal goes down?

Bajaman · #18 07-31-2008, 10:55 AM

Quote:

What are you using for the air filter Fram?

Yes

Quote:

What did you do for the exhaust?

I made an adapter I think its the third pic

Quote:

So the VCV increases vacuum as the pedal goes down?

Correct. The position shown in the pics is the position at WOT. In this position there is little pressure on the valve from the spring so the vacuum signal is high (15 mmHg in my case).

winmutt · #19 07-31-2008, 02:07 PM

Quote:

Originally Posted by Bajaman

Yes

I made an adapter I think its the third pic

Correct. The position shown in the pics is the position at WOT. In this position there is little pressure on the valve from the spring so the vacuum signal is high (15 mmHg in my case).

Whats the model number on the Fram, I really hate my over priced cheese cloth.

Did you use the stock actuator, it looks like it but I can't tell?

KarTek · #20 07-31-2008, 03:51 PM

Install looks great Bajaman, nice job...

Quote:

Originally Posted by bgkast

Yeah, that's it! I should stick a mic up under the intake and record the sound. It's pretty funny.

Quote:

Originally Posted by Cervan

Installing a blow off valve will remedy any compressor surge. Not a cheap one that makes a huge WHOOOSH every time you let off of the throttle, i mean a good solid tial or greddy BOV.

I'd be curious to see how you'd hook this up. I'd love to get rid of the surge on the truck.

Bajaman · #21 08-01-2008, 08:25 AM

I also hate "air strainers". There was no way I was going to put one of those pieces of crap on there. Most 3.8l equipped cars use the same air filter. I got this one out of a late ninety's LeSabre. I looked at several other buicks and they were all the same. The Volvo air box is very slightly larger, but the location of the ducting on the 3.8 box is basically perfect. Actuator is stock, though I had to clock the compressor housing a little to clear the intake manifold.
Thanks for the complements guys. I still can't get over how much of an improvement this made.

mrchill · #22 08-01-2008, 09:04 AM

Based on your description it doesnt sound like surge(another poster was accurate in the chuffing sound). When the vnt opens fully...ie: low boost, the exhaust will drone. A really annoying sound. The right resonator will correct resonator will eliminate this sound. Are you running a straight pipe?

Bajaman · #23 08-01-2008, 10:40 AM

Stock exhaust. I believe this is an accurate description of what is happening.

bgkast · #24 08-01-2008, 11:12 AM

I'm not sure the 3.8 airbox has enough filter area for the 617. It has quite a bit less area than the stock filter.

winmutt · #25 08-01-2008, 11:35 AM

Quote:

Originally Posted by bgkast

I'm not sure the 3.8 airbox has enough filter area for the 617. It has quite a bit less area than the stock filter.

The K&N barely cut it compared to the OEM filter. I hope the fram is as good but cant find any numbers.

What was the model on the fram filter? Or the GM Delco part number?

MTUpower · #26 08-01-2008, 03:15 PM

I think FI earlier posted a link as to the flow capacity of the 3.8 filter housing, and it was IIRC 450cfm. A K&N will "help" this, but it HAS to be clean. Don't overoil it as the 240D sep unit is underrated for a high boost 95X. If you use a paper filter you will turn it into a oiled filter soon enough...

bgkast · #27 08-01-2008, 04:03 PM

Quote:

Originally Posted by MTUpower

Don't overoil it as the 240D sep unit is underrated for a high boost 95X. If you use a paper filter you will turn it into a oiled filter soon enough...

There is no MAF to hurt by over oiling the in these cars. Oil away!

#28 08-01-2008, 05:23 PM

More oil is not better on a K&N.

bgkast · #29 08-01-2008, 06:31 PM

Por que?

Bajaman · #30 08-02-2008, 11:21 PM

I used the 3.8 box because thats all I could find that fit and wasn't an oil gauze. Also, it will allow me to have a cold air intake. If I can find something more suitable, I will surely put it on. I may have to resort to making something that uses a cylindrical filter??