Hey guys! As per my sig, I am stepping up my 6.5 (probably install this weekend). I spoke to the guy doing my chip and he said it will allow up to 15-17 lbs of boost (80hp chip) and I am just curious if the stocker engine can handle it. Has anyone had any problems with upgrades and engines not handling it? My truck/engine only has 95K (miles) on it and would hate to see rods coming out of it:eek: . As you can see in my sig below, I am doing a fair amount of bolt-ons and hope it is not in vein. Any feedback/input is greatly appreciated!!


jamminGMC:D

15-17 is a bit much without an intercooler. Generating that amount of pressure makes an awful lot of heat with the stock turbo, and you EGT's will skyrocket as a result

I would limit myself to 12-14 TOPS without an IC.

Whether or not she can hold together at those levels??? That is the subject of much debate. In stock trim, I would imagine that something would object, probably head gaskets.

Tim

12 tops to be safe without an IC. If you have access to a Snap-On MT-2500 scanner, hook it up and go for a drive and monitor IAT at stock boost levels and then wire the wastegate shut and see how high they get at marginally higher boost levels.

Thanks guys....My Turbo Technolgy INC. Intercooler should be here this week. I will not run her without it. I just hope that all of these upgrades will be worth it in the end):h


jamminGMC:D

I think you'll like it better than stock. Think about a deep tranny pan and/or aux. tranny cooler to keep the tranny going.

hey quantum, thanks. I should have added my tranny in my sig:banghead:
I have a tranny built by Roadmaster in Ill. It has a huge Hughes Performance deep, finned pan on it.....the whole system now holds like 18 qts of fluid:eek: It also has the towing convertor that has a stall speed of 1800 RPM's!!!


jamminGMC:D

The intercooler helps, but would save you totally. Extended time with high boost levels will cause problems like cracked pistons etc. If you really want more boost, go for 18:1 pistons, and you can jump up that boost. Boost is to burn the fuel, more boost doesn't mean more power unless you add more fuel.

more fuel.....thats what the marine injectors are for;) . I have been pondering the thought of 18:1 pistons, but I dont have the money for that right now.

jamminGMC:D

more fuel.....thats what the marine injectors are for;) . I have been pondering the thought of 18:1 pistons, but I dont have the money for that right now.

jamminGMC:D

I'll peak to 15-17 with my IC but don't stay there, also don't run sustained above 10 psi while towing on grade, to save engine after horror stories I just drive slower on the grades even though I can make more power/boost. 10 psi was my self imposed limit when I ran without IC loaded or empty.

Marine injectors are significantly over-rated in my experience, I have them, but to be honest I'm not sure if they added anything or not. In route for building power save that for the last bolt on if at all, airflow & reflash & IC are the mods that give best bang for buck IMO. To keep it all together once you unleash hidden power 18:1 and splayed mains are required updates, until then be judicious in using "found power" that bolt on mods add, for longevity splays/18:1 are the ticket.

All you self destructors out there scared me I just dropped the pan on my 98 oil spray "at risk" S engine, so far the Diesel Gods have smiled on this mortal 99854 block crack free miles, extended warranty I bought runs out at 100K which is real reason I dropped the pan, what a PITA on a K truck. Now I can sleep while saving coins for the splays, and other "stuff" for my 18:1 build.

Marine injectors, that's injectors, not fuel quanity. Need more fuel quanity to make more power.

Marine injectors, that's injectors, not fuel quanity. Need more fuel quanity to make more power.

your right, sorry. The marine injectors pop at a higher pressure. In order to build more pressure, it will take more fuel to build said pressure:confuzeld, right?? What builds the pressure if it is not more fuel? Someone help me out here.....


jamminGMC:D

Roughly explained marine injectors atomize differently, IP still makes the pressure but marine injectors hold back the flow longer with stiffer spring and atomization is finer mist & better burn, some also have different spray tip orifices for more fuel once it gets delivered.

IP is the pump making the pressure so regardless how big a hole you are squirting fuel thru or how fine the spray, nozzles themselves don't gain much, PCM is controlling delivery duration, amount, and timing, unless you do something to change that ratio little if any benefit over stock injectors, once you reflash the PCM or rechip to alter delivery marine injectors can be of some benefit, injectors alone aren't best bank for buck improvements.

Currently some are working on ways to maybe get some more fuel out of the IP from internal mods, jury still out on that one, re-chip or flash for now is only way thus far that has demonstrated more actual delivery without having to go into the IP. Optic bumps add some fuel but can be tricky to pull off to those not familiar with working on IPs done incorrectly cause more problems than worth the effort from what I read (my opinion, others swear by it), and also incrimental gain by going to larger PMS/FSD calibration resistor.

In Faqs are several IP how it works threads.

I am adding the 80hp chip from SS. I have also got the PMD cooler and #9 resistor. I hope this is worth the $$ I am spending:banghead:


jamminGMC:D

Higher pressure will atomize better, but it's still the same amount of fuel. 63mm3 is at 1800 psi, is still 63mm3 at 2000 psi, etc, etc. May gain efficiency, but not a tremedous amount of power.

*With increased power, you come increasing closer to the grave plot for the engine.