Crankcase Evacuation System for LT-5 ! - ZR-1 Net Registry Forums

01-12-2008

Advantages and disadvantages for Lt5 !? meaning that its 415-427 cid, plus Turbo, or without it!
Is it possible ? if not , why not?

kenthompson · 01-13-2008

Quote:

Originally Posted by HADI-ZR1

Advantages and disadvantages for Lt5 !? meaning that its 415-427 cid, plus Turbo, or without it!
Is it possible ? if not , why not?

I'm relatively sure you DONT want to try this system on anything but an open header, gas ported, race motor. I've never had it work decent on anything else. The backpressure kills the vacumn needed to make this work.

flyin ryan · 01-13-2008

very old scool, never did work all that great. but back when there was nothing else guys thought it was doing something.

RICHARD TILL · 01-15-2008

i`ve got that same crankcase evacuation system on my dragboat. (big block chevy 496 c.i.d.) never seen it used except in race applications.

GOLDCYLON · 01-15-2008

I wouldnt do it.

01-15-2008

Quote:

Originally Posted by GOLDCYLON

I wouldnt do it.

Wy not Gold ??!

do you think the pressure in crankcase during high-rpm ,with Lt5 engine say 427 cid+Turbo will be same as stock lt5??

engine like low pressure build-up in crankcase! more pressure=more heat!
less intake charge contamination!
JMO

flyin ryan,
i like old school !! our Z is old school too ;-)

flyin ryan · 01-15-2008

my first try was too long & i got auto logged out so i'm going to shorten this up

. at WOT there is not enough draw to do anything. maybe two or three inches tops, & thats with open headers forget about getting even close to that much with mufflers. if you were going to do that deal you'd need to put another reed , check valve, into the plenum & Y it into a hose going to a collector. then you'd have some good draw at idle & part throttle. again you couldn't use that with mufflers though because over time oil will accumulate in the mufflers & burn off when it got hot enough, smoke. i've never been a big fan of PCV type systems but they work better than most people give them credit for.

bradslt5 · 01-15-2008

has anyone tried one of those electric vaccume pumps for our cars ?

flyin ryan · 01-15-2008

electric vac. pumps would seem to be the answer for a lot of reasons. i have them in some of my customer's cars & they work great. the downsides? they draw a LOT of elec. power & i've had a few i've sent back for warrenty twice. i'm not sure if oil mist is getting into the pumps & killing them or what, shouldn't be but i can't say for sure, they keep sending me new ones. of coarse oil mist in a belt driven pump is welcomed for lubrication & vane sealing. if i was put on the spot, i'd say, right now electric pumps are more for short duration usage. in a perfect world they have some positives, no doubt about it.

01-12-2008	#1
HADI-ZR1 Guest Posts: n/a	Crankcase Evacuation System for LT-5 ! Advantages and disadvantages for Lt5 !? meaning that its 415-427 cid, plus Turbo, or without it! Is it possible ? if not , why not? Last edited by HADI-ZR1; 01-12-2008 at 06:15 AM.

01-13-2008	#3
flyin ryan Join Date: Aug 2006 Location: Edmonton, Alberta or Phoenix, Arizona Posts: 2,736	Re: Crankcase Evacuation System for LT-5 ! very old scool, never did work all that great. but back when there was nothing else guys thought it was doing something.

01-15-2008	#4
RICHARD TILL Join Date: Aug 2005 Location: Iuka, Mississippi 38852 Posts: 756	Re: Crankcase Evacuation System for LT-5 ! i`ve got that same crankcase evacuation system on my dragboat. (big block chevy 496 c.i.d.) never seen it used except in race applications.

01-15-2008	#5
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,120	Re: Crankcase Evacuation System for LT-5 ! I wouldnt do it. __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V

01-15-2008	#7
flyin ryan Join Date: Aug 2006 Location: Edmonton, Alberta or Phoenix, Arizona Posts: 2,736	Re: Crankcase Evacuation System for LT-5 ! my first try was too long & i got auto logged out so i'm going to shorten this up . at WOT there is not enough draw to do anything. maybe two or three inches tops, & thats with open headers forget about getting even close to that much with mufflers. if you were going to do that deal you'd need to put another reed , check valve, into the plenum & Y it into a hose going to a collector. then you'd have some good draw at idle & part throttle. again you couldn't use that with mufflers though because over time oil will accumulate in the mufflers & burn off when it got hot enough, smoke. i've never been a big fan of PCV type systems but they work better than most people give them credit for.

01-15-2008	#8
bradslt5 Join Date: Oct 2007 Location: lone pine and mammoth lakes ca. Posts: 544	Re: Crankcase Evacuation System for LT-5 ! has anyone tried one of those electric vaccume pumps for our cars ?

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