92redram

Well guys got the spring in and everything back together and the trucks runnin fine now *thanks for everyone who helped me with my problem* but i dont really feel a difference with my truck....infact i think it has LESS get up and go...dont know if i didnt do somthing right or what but so far i am not impressed!

dpuckett

What kind of EGT/ boost readings did you get before and after? It wont make a HUGE difference in power, but it will allow the pump to pull hard up to 32-3500rpm, instead of falling on its face at ~2700-3000RPM.

Daniel

92redram

not sure on my boost my boost gauge only goes to thirty...EGTs are bout the same....it just kinda lost that "throw ya back in the seat" feel ....least that what it seems like to me...maybe its all in my head

lowwag64

I was able to let the truck run up into the turbo range and have more fun.Before the spring install my truck was 2300 max,now I can stay in it until 3000-3200 before shifting.I've got a 21" lagmaster so I really feel the power after 2000rpm.

rebal

you might not have the fuel screw in the same spot? the 3200 spring is the biggest bang for the $ and you should of felt a big differance

edwinsmith

Did you get the throttle (yeah I know it don't have that) shaft back in the same position? You might need to move it a notch CCW in relation to the lever.

Also, I found that it's very easy for it to move when you're putting the big nut back on and that will retard the index.

Edwin

92redram

i dunno i guess i need to do a lil fine tuneing....ill get back to yall on that

dieselJon

When I did mine, I had to screw the high idle screw back about 4-5 turn before I noticed anything. Try doing that. The one end had a cap on it. When you replaced yours you might have moved it in too far and limiting throttle travel.

Hope this helps,

Jon

Cowboy_Customs

Not everybody gets the same results with the spring. Could u see, feel a difference between the 2 springs them selves? (did ya give the spring a tug before it went in) It is possibly it already had a spring put in by a previous owner, or a previous pump shop rebuild. Maybe it had a 4K spring. Do u have a tach? what did it turn for rpms before n after? im hoping the one you installed u checked the part number on the bag n 366 was written on the side of the spring?

Caver Dave

I installed the 366 spring & turned the fuel pin this weekend...

Initial impressions are the 45* spin (from centered between Deep/Shallow toward shallow side) brings the fuel on a bit quicker...

336 spring does absolute diddly... until it hits about 2500rpm where it used to de-fuel... now it pulls to WELL above 3200rpm! FWIW, I thought it might change the shifting up a bit (maybe it did about 200rpms worth?), but for the most part it only allows higher rpms once in 3rd or OD... w/ NO real change in overall power...

THAT'S what the other tweaks are for!

Cowboy_Customs

Yeah, the spring isnt a power adder per say, its just different fueling characteristics really. Mine was just a whole new animal after the install. But at 332K miles at the time of install in an OEM pump........

Ace

Most likely throttle shaft index. You cannot correctly install that spring and see anything but a tremendous benefit, especially on a stick trans. Auto trans maybe somewhat less dramatic, but I can't see what tranny you have.

MikeThomas

Like CC say, the spring nets you no HP, it only allows you to take the engine into a higher RPM range.

Ace

Yep, "whole new animal..."

Boatnik

Try adjusting the high speed stop screw. I don't exactly know the right name for it but it limits the amount of travel to full fuel. It is on the out side of the pump in relation to the engine. The way I didi mine was to back it off until the throttle lever doesn't touch at full fuel. Then run it back down until it touches plus a quarter turn.