414c.i. Conversion Update

[Pokageek]

I thought I would let you guys know the latest on this car and another pitfall to watch out for. Apparently my car wasn't going past 5200 b/c there was not enuf pressure being let out of the crank-case. Now that I have OPEN K&N breathers it allows it to breathe without blowing the dipstick.

Since Rick91GT tuned it, it's putting out 30 more rwhp and pulls past 6500RPM (I don't take it past 6k tho in general). I took the car out tonight and it feels like it has enuf HP to rip the car in half LOW end and UPPER end. I mean it's down right nasty. After all this time I am finally impressed.

The last parts I am going to refine are a little noise from the TQ box plates..I think they are "clinking" a little, battery to rear, tubular K, a FPR to get my remaing rwhp out of it, and I've got to do something about the oil smoke if I get on it... its kind of excessive but not horrible.

O' yea, at some point I will be selling my g-force b/c I do not need the high highway gear as I don't need anything past 3.55's on mine. :SNSign:

 

[final5-0]

Its good to see you like the car more these days Keith

The smoke could be from breather blow-by and dripping
down on the hot headers

Grady

 

[Pokageek]

Its good to see you like the car more these days Keith

The smoke could be from breather blow-by and dripping
down on the hot headers

Grady

Thanks Grady. Yes you are correct. That's where it comes from..but how do you fix that?

 

[99FiveOh]

why are these engine plaqued by this blow by? When you build a new motor, isn't there anything you can do to prevent it? And 455 HP is very nice, especially without worrying about issues associated with power adders!

 

[BlackVert]

mine doesn't seem to have the crankcase pressure problem yours has. i have never had the dipstick come out or anything like that. what is the cause of all the pressure?

 

[Pokageek]

I don't know Chris. I will have to ask Rick. The engine is healthy. But It may also be that I don't have baffles on my valve covers? It may be the nature of big cubes and high RPM. I never thought these engines were high revvers but it keeps pulling hard and going up in HP on the dyno past 6500 now. I also have ultra light weight rods in mine.

 

[1slow95]

Wow, an extra 30rwhp from a re-tune is awesome. So where does the hp peak at? Mine flattens out from about 5500 to 6200. Maybe I do need that tb upgrade....

I'm hoping to pick up some hp with the AEM. I still have a long way to go though....It feels like it's making about 200hp right now.

 

[Pokageek]

It used to go straight down at 5200 but it kept building past 6000 on a slow and steady incline with the new tune and computer. It stops early because he had to let off as oil was blowing out once it went past 5200 with the small breathers. It popped one of the breathers clean off lol. The cams ideal HP range is designed for 3200-6500.

Low end TQ increased dramatically also.

 

[BlackVert]

I don't know Chris. I will have to ask Rick. The engine is healthy. But It may also be that I don't have baffles on my valve covers? It may be the nature of big cubes and high RPM. I never thought these engines were high revvers but it keeps pulling hard and going up in HP on the dyno past 6500 now. I also have ultra light weight rods in mine.

What is the compression ratio of your motor? This is just a guess, but I imagine it might be normal for a tiny amount of air to make it through the rings on the compression stroke. Perhaps the higher the compression, the more likely a little air will get through the rings?

 

[Pokageek]

Sure. It is 10:45:1 and IIRC, Rick set it up with loose tolerances, whatever that means U dunno.

 

[S351Saleen77]

mine doesn't seem to have the crankcase pressure problem yours has. i have never had the dipstick come out or anything like that. what is the cause of all the pressure?

I have never had this problem either. I don't have baffles in my valve covers and I don't have a PCV valve.

I have a breather on the drivers side and on the passenger side I ran a hose to a Oil separator for air tools then to the discharge side of the blower. The oil separator works great!

 

[final5-0]

You will want to inform Rick about that pressure

The loose tolerances would be the fit of
main bearings
rod bearings
piston to cyl wall
etc etc etc

Looser is Lesser Friction

Less Friction is More Horsepower

btw ... It should be ovbious

You'd not wanna do that kinda thing on a daily driver

Race Car ... Sure

Weekend Toy ... Why not

Grady

 

[Pokageek]

"You'd not wanna do that kinda thing on a daily driver "

Sorry, do what kinda thing?

 

[99FiveOh]

I think he was referring to the "loose tolerance" thing.

 

[95Vert383AOD]

Hey i had the problem before with the breathers "Popping off" Then i realized the valve cover breathers had to be connected on the intake pipe side (Wider the throttle more gases get sucked threw). The EGR had to be connected to the intake plenum. (So it gets full vacuum all the time) I made the mistake of connecting the EGR to the intake pipe because The Trickflow R Box intake only has 3 Vacuum ports.

Basically when my throttle closed there was no vacuum on the EGR. I was literally getting oil leaking out the valve cover grommets. and blew one off before.

Lesson for me is ALWAYS connect the EGR after the throttle plate so it has full vacuum!!!

But its good to see your project shaping up nicely. I hope Ed gives me a nice healthy cam around .600 lift. Nothing like having all that power and still using pump gas no supercharger.

 

[turbogt]

Hey i had the problem before with the breathers "Popping off" Then i realized the valve cover breathers had to be connected on the intake pipe side (Wider the throttle more gases get sucked threw). The EGR had to be connected to the intake plenum. (So it gets full vacuum all the time) I made the mistake of connecting the EGR to the intake pipe because The Trickflow R Box intake only has 3 Vacuum ports.

Basically when my throttle closed there was no vacuum on the EGR. I was literally getting oil leaking out the valve cover grommets. and blew one off before.

Lesson for me is ALWAYS connect the EGR after the throttle plate so it has full vacuum!!!

But its good to see your project shaping up nicely. I hope Ed gives me a nice healthy cam around .600 lift. Nothing like having all that power and still using pump gas no supercharger.

I'm planning on both... My engine builder is officially looking for a block for me.. 351 stroker here I come

 

[Pokageek]

"I have a breather on the drivers side and on the passenger side I ran a hose to a Oil separator for air tools then to the discharge side of the blower. The oil separator works great!"

Saleen, Right now I am running this on both sides:
Summit SUM-G3405 - Summit® Valve Cover Breathers - summitracing.com


I think I saw this setup in summit.. Would this solve my issue? How do you set it up? Does it flow enough air or am I back to the same problem?

Moroso 85471 - Moroso Air/Oil Separator Tanks - summitracing.com

http://www.jegs.com/i/Steeda/957/555-3710/10002/-1

I don't have a PCM system OR EGR though..



I think I found the definition on an airplane forum:

"I think you are referring to the crankcase breather in a piston engine. This allows the pistons to move without compressing the air beneath them and therefore run more efficiently.

Because there is a lot of oil around in the crankcase, some of this will get vented with the air through the breather tube (especially when flying aerobatics). The separator uses a centifugal flow to separate the oil from the air, collect it and return it back to the sump, thereby keeping the belly of the aeroplane clean and the oil tank full."

95Vert383AOD - what EGR lol.

 

[95Vert383AOD]

Ohhh well yeah there it is....all pressure has to be pulled from the valve covers. I discussed this with a friend. Personally if it were me i would have a machine shop cut a hole so i could add a grommet /baffle and EGR. But thats just me.

No EGR = Valve Cover Pressure....Oil catch cans, etc. I'm suprised aftermarket Carb intakes don't include EGR ports. My Trickflow Box intake has one.

Find a reg 302/351 motor with an egr....cover the hole and see how much pressure gets pushed threw the valve cover. I think the time for a EGR carb intake has come.

 

[divit250r]

Ohhh well yeah there it is....all pressure has to be pulled from the valve covers. I discussed this with a friend. Personally if it were me i would have a machine shop cut a hole so i could add a grommet /baffle and EGR. But thats just me.

No EGR = Valve Cover Pressure....Oil catch cans, etc. I'm suprised aftermarket Carb intakes don't include EGR ports. My Trickflow Box intake has one.

Find a reg 302/351 motor with an egr....cover the hole and see how much pressure gets pushed threw the valve cover. I think the time for a EGR carb intake has come.

Do you mean to say PCV each time you put EGR? The crankcase ventilation is the issue, not exhaust gases, right?

Scott

 

[95Vert383AOD]

Fawk ...Yeah PCV. You don't know how many times a say EGR instead of PCV when talking to people. hahaa and they say "Dont you mean PCV...."yeah yeah that thing"