Engine/Transmission (1994 - 1998) 4000 RPM on stock valve springs!

[Forrest Nearing]

oops!!



scared me a little... I'm pretty sure the valves were floating a bit because it sputtered and popped. Luckily it was only very briefly in 2nd gear w/ hardly any load on the engine.



everything seems fine. scared me though! LOL!



Forrest

 

[Gary - K7GLD]

You mean that's ALL yer gonna tell us?



Did ya BEAT that Ford, or what?



Details man, DETAILS...

 

[Forrest Nearing]

didn't beat the Ford... beat my buddy's firebird... we went from a roll... I shoulda been in 3rd, but I was in 2nd... revs came up QUICK!!! LOL! his car is a 305 automatic, so between the popping at the top of 2nd, and the slow shift to 3rd, he put a lot of ground on me... but by the top of 4th gear, I had about three bus lengths on him



if I woulda started out in 3rd, he probably would have gotten out on me just as far, but I think I woulda reeled him in quicker.



Forrest

 

[Forrest Nearing]

clarification: there was no Ford. I have not been pulled by a Powerstroke yet! obviously not implying that my truck is faster than every Ford on earth, just saying I haven't run into a fast one yet

 

[DHorstman]

So far I've hit upto 3600 RPM over the weekend.

Might have to upgrade to better springs over the winter.

 

[Forrest Nearing]

I generally shift at about 3400... I've wound it out beyond there, but I try to keep it at 3400 or less. I'd never run into valve float like that though. It gives ya a sick feeling in your stomach! LOL!



Forrest

 

[SEmerson]

What is your timing at? I am at 16 and start to flatten before 3.

 

[Forrest Nearing]

timing is at 16*



haven't had it on the dyno, but it pulls hard above 3000... 3400 comes up quick in 2nd, and I gotta wind it out in 3rd, so when I hit 4th, I'll be right in the sweet spot.



Forrest

 

[JBUTTS]

I was told not to go over3200 rpm's on my truck. I have a1997 12 valve with a 3k kit , banks stinger plus and a DTT trans

 

[Forrest Nearing]

mine sees 3400 quite often... I've got 225k miles on it. "your mileage may vary"



Forrest

 

[RT66DOC]

Forrest - if you had a six-speed you'd have another sweet spot alot closer than the one you were looking for without spinning your mighty Cummins to four grand. Jeez man, they come apart at 4200.

 

[SEmerson]

Originally posted by JBUTTS

I was told not to go over3200 rpm's on my truck. I have a1997 12 valve with a 3k kit , banks stinger plus and a DTT trans

With a 3kgsk you will start to defuel at 3200.

 

[RT66DOC]

I think Forrest needs a 3GSK to keep him outta trouble.

 

[biggy238]

A 3. 5k gsk more fuel pull and less float. Someone should make it happen.

 

[DHorstman]

Mine quit revving at 3600 rpm, must have been fuel as it hasn't bent any valves.



In low range 2nd gear with 33x13. 50-15 M/T bajas 3600 came on real fast, even when climbing the sand hills. Going up the dunes it would up shift into 3rd and still pull 'till 33-3400 at times if I were to let it. When in 3rd I'd try to maintain 3000-3200 rpm.



But.....

I also slipped a click on a retainer, again. Atleast that is why I figure it suddenly quit idling after a 3600 rpm pass. Did this once before and that is what it was.



BTW, I do have a 3K GSK.

 

[JBUTTS]

IF my tach goes past 3200 rpm's with my 3k kit it won't hurT my valves or motor ? I have a DTT trans and after about 1year it started slipping. DTT is shipping me a new one . Looks like this weekend it will be put in. Ihope I can enjoy my new trans soon

 

[DHorstman]

Originally posted by JBUTTS

IF my tach goes past 3200 rpm's with my 3k kit it won't hurT my valves or motor ?

Don't know about yours, but mine is still OK.

Turned the idle stop up for now and driving every day.

 

[Forrest Nearing]

based on my experience, reving to 3400-3500 ain't gonna hurt...



I try to limit it to 3400, but 3500-3600 comes up quick sometimes!



Forrest

 

[edmeyers]

i have the 4k gsk and 60lb valve springs and i can't get more than 3200 and the dyno graph shows a big drop after 2600 to 2800 then it spikes again from 2825 to 2950 at that point she's done fueling i installed the springs with initial plus 3 clicks and that droped my idle down about 100rpm's but since then my idle has come down another 100 rpm's so i sit with a/c on at about 650. before i was at 850. dose anyone have any ideas on my setup?

 

[Bob4x4]

The 94 pumps don't like to rev high.



Bob