bigred496

i love my truck but unfortunately it came with no intercooler. i have turned the pump up a bit, and now unloaded when i pull a grade for a long time, i mean several miles, it stays between 700-900. of course in the ongoing quest for more power i intend to add injectors and more pump tweaking, as well as a bhaf. i want to keep the egts down so i know i need to get an intercooler. what is the best way to put an intercooler on this truck. i thought about getting a used one off of a newer 12 valve but i heard they are only good to 30psi, and right now my max boost is 33. any help on this subject is greatly appreciated.

apache

Is your thermocoupler pre turbo? Dang, your makin pretty decent boost it sounds like. Im jealous

bigredbrick

Your EGTs are what my truck does on long grades. I'm only getting 15-16lbs of boost! From what I've heard that's about right for a mostly stock truck.

ramguy

bigred496;
There is a few of us running in the 40-47psi range with no problems w/ the stock cooler. However the stock coolers are restrictive on big boost levels (lower CFM rating) than the 2nd gens. I know PDR offers a after market cooler for our trucks nascar Mark installed one not to long ago. Call PDR and talk to Pastor Bob or Nascar Mark. There phone # is in the links section under high performance. Keepem SMOKIN
ramguy

jleonard

I also have no intercooler, and right now I have no intentions of adding one.
I run mostly empty or lightly loaded, and I don't tow....my EGTs are in line with bigred's....I can get to 1100 F but I have to really push the truck to get there. My boost gage bottoms at 30 easily...so my guess is I'm in the 35 psi range.
Right now the truck has enough power for a daily driver and is fun to drive. I also don't want to push the Getrag too much more.
I might hybrid my stock turbo, but that's the only real addition I care to make.
I need to dyno to see where I am for hp.

bigred496

thanks guys. i mostly run unloaded too, except for in the summer when i have about 5000lbs of wood in the back going over the pass, i havent taken it out yet after the pump tweek so im anxious to see how it does, it already crawls up and down those mountains without any trouble. as you might have read in another post, my buddy has a 2000 that i am constantly striving to be better than. right now i am quicker, but he has a faster top speed, this is why i need an intercooler, so i can add more power.

bigred496

oh yeah and my pyro is pre turbo

jleonard

Nothing that a few cranks on the governor screw won't change....
or go with a 3 K governor spring.
I upped my gov about 150 rpm.....I just couldn't get to triple digits on the speedo.....problem now solved!

bigred496

i have always wondered about what effects that might have on the motor, how is it. does it sound okay. what are the effects on durability.

bigred496

how much is the governor spring, and where can i find one, it seems like a pretty easy mod, i might want to try it/

ramguy

bigred496;
Contact Monty "Okiebroncrider" our moderator he can help you. He did me
I think I paid $13. for a spring if you very many miles on the pump I'd change the breakover spring while your at it mine was allmost worn complete through at 180k.
ramguy

Bushy

The temps you are showing are great... they are well inside the safe range for any of the 1st gen trucks.
Normally you want the 89 - 91.5 model years to stay on the lower side of the generally accepted "safe max operating temp" which is about 1200 - 1250*F.
Because the earlier trucks had no intercooler and they had a larger injector body (9mm as opposed to 7mm) than the later ones the head is more prone to cracking near the valve seat area.
The larger injector body resulted in less metal around that area to deal with heat, hence the potential for cracking.
I repeat, you are well inside the safe zone on your readings....
Our engines are also pretty safe to run upwards of 3200 RPM as well. I wouldn't recommend running there all day long or running much higher without the heavy duty 60 lb valve springs.
While many of us (me included) have pushed that limit significantly there's no guarantee you'll get away with it.
Make sure you have a good valve set too... the last thing you need is a combination of high RPM, tight valve set all at one time...


well that's all the damage I can do.... hope that helps...

pastor bob...