comp test & leakdown results
Thread Starter
Drifting
Joined: May 2005
Posts: 1,258
Likes: 38
From: springtown Texas
comp test & leakdown results
i've noticed my GS is smoking under acceleration or just reving in nuetral. it looks like blue-black color. anyway today i ran a comp test and then a leakdown just to see what all 8 cylinders are doing. this is the first time i did it to this engine so i have nothing to compare it to.
how do these numbers look
(1> 210psi. 5 % leak)..... (2> 210psi. 5 % leak)
(3> 200psi. 6% leak)..... (4> 215psi. 4 % leak)
(5> 200psi. 5 %leak)..... (6> 215psi. 5 % leak)
(7> 205psi. 5 %leak)..... (8> 205psi. 3 % leak)
what would make it smoke so much, could it be the oil rings or valve seals. all the plugs were dry when i pulled them. no oil on them and they were all a light tan almost white color.
the motor is running strong accept the smoking
any ideas.
oh... the motor has @30,000 miles on it.
this is the short block i have with my lt4 heads and intake on it
http://www.sdpc2000.com/catalog/1580...e-Assembly.htm
Scoggin-Dickey
LT1 383 11.8 to 1 Flat Top Piston, Custom Short Block Engine Assembly
This custom short block engine assembly from SDPC features a race prepped LT1 block with Milodon steel splayed center main caps. It also comes with a Lunati 4340 forged crankshaft, Lunati Pro Mod 5.850 rods, SRP forged flat top pistons, JE file-fit rings, Federal mogul race bearings, and is internally balanced.
how do these numbers look
(1> 210psi. 5 % leak)..... (2> 210psi. 5 % leak)
(3> 200psi. 6% leak)..... (4> 215psi. 4 % leak)
(5> 200psi. 5 %leak)..... (6> 215psi. 5 % leak)
(7> 205psi. 5 %leak)..... (8> 205psi. 3 % leak)
what would make it smoke so much, could it be the oil rings or valve seals. all the plugs were dry when i pulled them. no oil on them and they were all a light tan almost white color.
the motor is running strong accept the smoking
any ideas.
oh... the motor has @30,000 miles on it.
this is the short block i have with my lt4 heads and intake on it
http://www.sdpc2000.com/catalog/1580...e-Assembly.htm
Scoggin-Dickey
LT1 383 11.8 to 1 Flat Top Piston, Custom Short Block Engine Assembly
This custom short block engine assembly from SDPC features a race prepped LT1 block with Milodon steel splayed center main caps. It also comes with a Lunati 4340 forged crankshaft, Lunati Pro Mod 5.850 rods, SRP forged flat top pistons, JE file-fit rings, Federal mogul race bearings, and is internally balanced.
Thread Starter
Drifting
Joined: May 2005
Posts: 1,258
Likes: 38
From: springtown Texas
thank you Pete, i never even thought about the intake.
the motor was already in the car running when i bought it so i dont know what seals are in them.
how do i check for the intake leaking. or should i just remove it and change the gaskets.
the motor was already in the car running when i bought it so i dont know what seals are in them.
how do i check for the intake leaking. or should i just remove it and change the gaskets.
Thread Starter
Drifting
Joined: May 2005
Posts: 1,258
Likes: 38
From: springtown Texas
i'm going to change the valve stem seals and the intake gaskets and see if that helps any.
whats the best seals and gaskets for the LT4 and where is the best place to get new seals and LT4 intake gaskets.
thanks for the help
whats the best seals and gaskets for the LT4 and where is the best place to get new seals and LT4 intake gaskets.
thanks for the help
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Thread Starter
Drifting
Joined: May 2005
Posts: 1,258
Likes: 38
From: springtown Texas
i just did the seafoam last weekend. i took the tb off and poured the seafoam in my little spraygun and sprayed all inside the intake really good then used a 3/8 fuel line and funnel to pour it in each intake port and let it sit for @ 30 min.
talk about smoke for ever!!!!!!!!
it smokes under load or full throttle
talk about smoke for ever!!!!!!!! it smokes under load or full throttle
