Stiegmeier Question

[boca ron]

On a built motor I installed a ported eaton.I recently changed to a kb.What I thought was piston slap when cold turned out to be the ported blower.How? The very next time I started the truck the engine makes no noise or hasn't since. The noise sounded like a knock but goes away after warm-up.I was thinking about selling the blower but, I want to make sure if this is common or not. I don't want to sell something that has a problem. Performance wise I cant complain truck ran 11s @ 119 its just the knock when cold, it actually had me thinking I had problems with the s/b. Has anyone else experienced this? If I had to describe the sound Id say either a rod knock or extreme piston slap. This is not a bash stieg thread PLEASE ! clok clok clok clok clok...........

 

[miamijdm]

hmmm. well ron, you can give me the blower and i'll try it on my L. Like that we'll find out if its the blower or not? lol... j/k buddy... good luck with your L

 

[Derek@Amazon]

pull the rotor pack out and check the housing to see if its been rubbing.

 

[herb101]

:shrug: I've heard them grumble from cavitation and grind from rotor-case contact or bearing clearance issues, but never heard one knock.

The only thing that I could think would cause a knock would be SUPER loose rear bearing clearnances allowing rotor-rotor contact at the rear of the case when coupled with air pulses at low throttle.

Herb

 

[Derek@Amazon]

more likely to have rotor deflection under WOT then at idle.

 

[boca ron]

after it warms up its quiet. It only does it at cold start up.But, its def. the source of my noise. ANY reasonable offer will do. I bought it yhru jl 2.5 mts ago prolly has 2000 miles on it I paid 6 and core. they really did a nice job on it rotors stripped etc....... Its currently collecting dust with a ported polished c/l is 5 for both fair ?or too much? but its a knock for sure. Ive built 11 or so L motors and thought just my luck the only one to have piston slap would be mine. I was very happy to find out otherwise.

 

[Stewart_H]

I have a Stieg ported Eaton and mine works flawlessly.

When I bolted it on, I noticed it sounded a little different than my original blower, but nothing out of the ordinary.

Mine sounds the same cold as it does hot.

Stewart

 

[herb101]

after it warms up its quiet. It only does it at cold start up.But, its def. the source of my noise. ANY reasonable offer will do. I bought it yhru jl 2.5 mts ago prolly has 2000 miles on it I paid 6 and core. they really did a nice job on it rotors stripped etc....... Its currently collecting dust with a ported polished c/l is 5 for both fair ?or too much? but its a knock for sure. Ive built 11 or so L motors and thought just my luck the only one to have piston slap would be mine. I was very happy to find out otherwise.

Have Dyno Bob give it a look-see. If it is something easy to fix, you can easily get a good sale on it.

Herb

 

[CHUXSVT]

i have heard alot of this noise. most say its normal, but mine doesnt do it. stage 2 here.