[Painless Autoworks]

Dynoed my truck this am for the fourth time this season. It put down 611/608 at 19.5# on 93. Gained 45 hp /55 tq by adding 2.5# boost. These 3.4's love to be spun. Boost is a little high for my liking but e85 coming in the spring so not worried. Plus I have a J&S Vampire to help. Runs great. 1k miles on fresh rebuild.

Every time I have had it strapped down I always see a little black smoke during wot which I know is fuel. Today though was different. Last pull of the session, 6k rpm just as the throttle was lifting there was a large puff of blue smoke. Lasted for 1 second then gone. It filled half the dyno room and blew out into the parking lot. I have NEVER experienced this before. Truck does not smoke at startup, idle, or while driving.

I have stock pcv routing with dual catch cans. Tuner thought is was pooled oil in lower intake being sucked into the cylinders. My thoughts are that my RH valve cover catch can was sucked dry and the oil was burned.

Any input on this?

Thanks guys

 

[D Davis]

sucked up a smurf?
seriously hope it's nothing, just a fluke

 

[Painless Autoworks]

sucked up a smurf?
seriously hope it's nothing, just a fluke

Yeah, that little guy netted me another 15hp! Haha

Anybody else?

 

[thunderholt]

I wouldn't worry about that too much

As soon as he let off the throttle the motor created a HUGE vacuum and could have sucked that oil from anywhere. Just pay attention to start-up after it has set overnight or longer...if you have blue smoke then you have bad valve seals.

 

[WHIPPLE]

If it's one of those straight through design catch cans (JLT type design) this can happen with a good amount of boost. On my 4V motor I swapped to the UPR dual valve catch cans with a check valve and cleared up my blue smoke. Just like you said the can would get sucked dry and get burned up. You could tell by pulling the outlet line and see oil vapor traces in it. The dual valve design forces the blow by or oil through to the bottom and filtered by a mesh screen and then is forced through a wire screen and a few metal screens which force the oil into droplet shapes and the only way to get out is up but the can design and mass of the droplets prevent that. I've pushed near 20lbs on E85 on a coyote with no oil in the outlet line. I also run a CFM valve cover breather with a check ball in it to relieve excess pressure at the oil fill cap on both my Lightning and Coyote. RX Speedworks is the original designer of the dual valve cans so that's another option.

 

[1qwktrk]

Did the extra boost come from the big inlet in the blower or did you pulley up? Noticing any other improvements with the monster inle?

 

[Fade 2 Black]

I ran my 3.4 on 20# street tune for years without problems, as long as you don't get greedy with the spark it'll work fine. Spun it to 28# trying to run E85 but injectors were too small (60#) and never tried it again.

 

[Painless Autoworks]

If it's one of those straight through design catch cans (JLT type design) this can happen with a good amount of boost. I also run a CFM valve cover breather with a check ball in it to relieve excess pressure at the oil fill cap on both my Lightning and Coyote.

I have a bob's autosports catch can. -12an inlet and outlet hose sizes. Straight through design with inlet on bottom and outlet on top. Looks like I should try a different can design...

Can you elaborate on the check valve setup you are running on your oil fill tube?
Edit: found it & bought one
http://www.c-f-m.com/performancepa...d-F-150-SVT-Lightning-1p326.htm#.VdvbKMvD-BY

Did the extra boost come from the big inlet in the blower or did you pulley up? Noticing any other improvements with the monster inlet?

I increased my lower pulley by 2lbs. Jumped from 17lbs even at 6k to 19.7lbs at 6k. I installed the monster inlet from the get go so I have no data reflecting the stock 2.3 plenum on the 3.4

4" upper and stock lower netted 14.8lbs = 550hp/550tq
4" upper and 2lb lower netted 17lbs = 565hp/556tq
4" upper and 4lb lower netted 19.7lbs = 611hp/608tq
3.5" upper and 4lb lower coming this spring with e85

I ran my 3.4 on 20# street tune for years without problems, as long as you don't get greedy with the spark it'll work fine. Spun it to 28# trying to run E85 but injectors were too small (60#) and never tried it again.

How much spark did you run? I am at 12*

 

[ilaybrk]

nice info I have never understood my truck always makes low boost I have a 3.4 with 4lb lower and 3.75 upper and my tuner said only 16lb when I was 2lb lower and 4" upper he said 14 pounds of boost. I just put the first 1200 break in miles on it so I haven't gone wide open yet but will run the 1/8 this Thursday see what it is my street tune is 14 deg race tune is 11 deg and was told to go up to 3.4 upper data log if all is good then we will go back to 14 deg tune. I was also told to run c16 with the 11 deg tune and 3.4 upper

 

[1qwktrk]

I increased my lower pulley by 2lbs. Jumped from 17lbs even at 6k to 19.7lbs at 6k. I installed the monster inlet from the get go so I have no data reflecting the stock 2.3 plenum on the 3.4


4" upper and 2lb lower netted 17lbs = 565hp/556tq
4" upper and 4lb lower netted 19.7lbs = 611hp/608tq


*

We all know weather/dynos are different, but interestingly enough those two pulley combos for you and i have nearly identical peak boost figures. Mine with beiung a stock inlet so far. My 4/4 combo just was a touch higher but only after 6k rpm where it would creep up to 21ish and I already on e85 squeeked you out power wise by about 40-60hp. im super stoked to get my inlet on now and compare.

 

[Painless Autoworks]

We all know weather/dynos are different, but interestingly enough those two pulley combos for you and i have nearly identical peak boost figures. Mine with beiung a stock inlet so far. My 4/4 combo just was a touch higher but only after 6k rpm where it would creep up to 21ish and I already on e85 squeeked you out power wise by about 40-60hp. im super stoked to get my inlet on now and compare.

I hear ya. Can't wait for 24lbs on e85. It is going to pick up some ponies!

Keep in mind with your boost/hp comparison. my truck is a 4x4 which adds a transfer case to the mix. Plus I'm on 22" wheels & 305/45-22 tires with 3.55 gears. Putting 20's on next year and smaller rubber.