valve float

[Diesel Power]

Oo. im finishing the quarter mile at 3600 rpm ; at what point do the valves start to float, i am not sure! this is a stock valve train. thanks

 

[lmills]

Mine ran between 35 and 3600 on the dyno the other month. Not to mention all the abuse it has seen on the street. I had no signs at all of valve contact. However I would definitely look into a set of springs if you intend to frequent that RPM. If you had a cam you would definitely have been a good candidate for P/V contact

 

[lmills]

Oh yeh, there are other things to consider also that affect valve float. Such as drive pressures, boost pressures and the age

 

[Diesel Power]

Mine ran between 35 and 3600 on the dyno the other month. Not to mention all the abuse it has seen on the street. I had no signs at all of valve contact. However I would definitely look into a set of springs if you intend to frequent that RPM. If you had a cam you would definitely have been a good candidate for P/V contact

no cam here, just stock

 

[Diesel Power]

Oh yeh, there are other things to consider also that affect valve float. Such as drive pressures, boost pressures and the age

boost is around 60 psi. the year is 04, and 80k on the clock----i will put better springs in later, but for now i think its going to be just fine! what do you think?

 

[JasonCzerak]

What are you guys doing to get to 3600rpm to begin with? in 6th, 3000 is it, but that's more then gov. stopping things.



Would this Edge Hot juice pull to 3500rpm in other gears?

 

[mattymac]

I think 3600 is about tops I wouldnt want to go any further than that on stock springs. Justin Williams had sone P/V contact with stock springs and a regrind. But the more important ? is, what was your ET/MPH?

 

[cerberusiam]

boost is around 60 psi. the year is 04, and 80k on the clock----i will put better springs in later, but for now i think its going to be just fine! what do you think?

Ouch!!!! I think you already IN the "danger zone".

 

[Diesel Power]

Ouch!!!! I think you already IN the "danger zone".

danger zone? why!

 

[jwilliams3]

You want danger zone hook it to the sled... .

 

[Diesel Power]

You want danger zone hook it to the sled... .

what rpm's were you running down the pulling track? before you replaced your springs, egt and boost are also needed. thanks

 

[RCC]

What do you have to do to spin 3600rpm? My truck is on the governor at 3100rpm's.

 

[Diesel Power]

What do you have to do to spin 3600rpm? My truck is on the governor at 3100rpm's.

yea right, your not turning 3100rpm at 116mph speed limiter cuts in at 110---------im turning 115. 7 at 3600rpm!!! so i know you are turning more ---you should be able to answer your own question----or you could have a 5 or 6 speed auto :-laf :-laf btw good time slips

 

[jwilliams3]

I had valve float at like 3100-3200rpm at around 50lbs.

 

[RCC]

I have a bd speed eleiminator that lets me pull past the speed governer,but as soon as it gets to 3100rpms the truck noses over.

 

[Diesel Power]

I have a bd speed eleiminator that lets me pull past the speed governer,but as soon as it gets to 3100rpms the truck noses over.

ok that makes more sence, but what your saying is it defueling after 3100 right?

 

[RCC]

It doesnt feel like defueling, it feels like like I am banging on a rev limiter(like in a gasser).

 

[lmills]

spin mine up past 3100 all the time.

 

[Diesel Power]

It doesnt feel like defueling, it feels like like I am banging on a rev limiter(like in a gasser).

then how do you push over 3100rpm if the revs are limited to 3100?---is hesitating a better word?

 

[WUnderwood]

soooo confused...