Lighting Compounds

[JR12]

I just put on a set of compounds 62/ht3b on my 97. And im having a hell of a time getting them to spool before 2200 rpms. but when they hit they hit very hard. I have ruled out boost and exhaust leaks already. have tried timing from 16-20 degrees verifying it every time before changing it again to rule out any gear slip. gets slightly better with more timing but how far should I push it? ive spent so much time trying to tune the afc and the fastest I can get it to light is 2200. As of right now I have the wastegate plugged trying to rule that out.

Mods
160 pump benched and balanced to 380cc 4k springs
Brand new OFV
10 plate slid forward
5 x .014 injectors
raptor pump (set to 35psi)
p&p / oringed head clamped with ARPs
188 208 cam
dps compounds 62/ht3b 26cm housing
valve lash has been set to .010 and .020

I have a 351 I can put on if I have to throw that on for faster spool. but there should be no reason these turbos don't come alive sooner. I have .024 DVs if its not enough fuel to light them already?? Does my 160 pump need a lot of timing to make it spool friendly? I have a few more boost gauges on the way so I can monitor drive pressure and primary pressure.

Is there any suggestions on something I can do in the meantime..

[Headcase98002]

Do you have the .70 or .80 housing? I preferred the .70 housing when I ran a set-up similar.

[JR12]

.70 is what im running now and its just completely baffling me that I cant get it to light with my tighter exhaust housing.

The more research im doing it looks like the 160 pumps like higher timing? 20-24* is this accurate?

[zfaylor]

160 pumps like higher fuel pressure as well. I lit my he351/ht3b compounds lightning fast so you must have an issue. I assume the 62 is gated. Have you made sure the wastegate on the 62 is not stuck open or leaking?

[Ghostman]

Hole in AFC diaphram?

[JR12]

Originally Posted by Ghostman

Hole in AFC diaphram?

AFC is in good shape. I took it apart and inspected it after hours of tuning just to make sure I wasn't punching myself in the peter and trying to tune for no reason.
though I do still have the stock spring in it. would it help for me to get a stiffer aftermarket spring?

Originally Posted by zfaylor

160 pumps like higher fuel pressure as well. I lit my he351/ht3b compounds lightning fast so you must have an issue. I assume the 62 is gated. Have you made sure the wastegate on the 62 is not stuck open or leaking?

62 is gated. but plugged at the moment. and I have verified it is in the closed position. What would the best way to check for leaks be?

You have the 160 pump on your 95 im assuming? would you be willing to enlighten me with your pump tuning/timing and maybe I can try using that as kind of a baseline? I know all trucks are different. but at this point im willing to try anything...including ditching the 62 just to try my 351 to see if I have better luck..

If I do throw the 351 on there what were you using for a wastegate? im under the impression that the stock wastegate will not work because you have to clock the turbo and it binds up somewhere?

I hate asking all these questions making me seem like im an idiot but im new to the compound world and I just want my pickup back....

[Ghostman]

I just welded a washer onto the turbine housing and used a spring and washer and nut.



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[JR12]

Originally Posted by Ghostman

I just welded a washer onto the turbine housing and used a spring and washer and nut.



Sent from my iPhone using Tapatalk

You wouldn't happen to remember any info on that spring would you? I think I have a picture in my mind of how to do this..

[Ghostman]

Just got an assortment from the hardware store. It needs to be pretty stuff if I remember right and have enough travel to not bind


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[DirtyMaxx03]

Originally Posted by JR12

You wouldn't happen to remember any info on that spring would you? I think I have a picture in my mind of how to do this..

They sell little car door springs at advanced autoparts or napa, etc. that what I used to make a spring gate it it worked perfect.

[jasonc]

Try a set up better delivery valves if yours are still the stock ones. Not saying full cuts or anything but a mild upgrade makes a big difference in spool on the 160 pumps I've been around.

[zfaylor]

Originally Posted by JR12

AFC is in good shape. I took it apart and inspected it after hours of tuning just to make sure I wasn't punching myself in the peter and trying to tune for no reason.
though I do still have the stock spring in it. would it help for me to get a stiffer aftermarket spring?



62 is gated. but plugged at the moment. and I have verified it is in the closed position. What would the best way to check for leaks be?

You have the 160 pump on your 95 im assuming? would you be willing to enlighten me with your pump tuning/timing and maybe I can try using that as kind of a baseline? I know all trucks are different. but at this point im willing to try anything...including ditching the 62 just to try my 351 to see if I have better luck..

If I do throw the 351 on there what were you using for a wastegate? im under the impression that the stock wastegate will not work because you have to clock the turbo and it binds up somewhere?

I hate asking all these questions making me seem like im an idiot but im new to the compound world and I just want my pickup back....

It was a 160 pump on a 2001 24v. I had stock dvs, 4ks, 7x12 injectors, and very little afc tuning.

What are the specs on the 62? Not all 62mm turbos are created equal.

[JR12]

Originally Posted by jasonc

Try a set up better delivery valves if yours are still the stock ones. Not saying full cuts or anything but a mild upgrade makes a big difference in spool on the 160 pumps I've been around.

I have a set of .024 DVs I am going to throw in there before I break down and swap turbos. What is a good timing for me to set my pump at? I do have a studded and oringed head so im not scared to advance the timing. At what degree does timing start to negatively impact performance?

Originally Posted by zfaylor

It was a 160 pump on a 2001 24v. I had stock dvs, 4ks, 7x12 injectors, and very little afc tuning.

What are the specs on the 62? Not all 62mm turbos are created equal.

Turbo is a 62/65/12 Dtech

[zfaylor]

Originally Posted by JR12

I have a set of .024 DVs I am going to throw in there before I break down and swap turbos. What is a good timing for me to set my pump at? I do have a studded and oringed head so im not scared to advance the timing. At what degree does timing start to negatively impact performance?



Turbo is a 62/65/12 Dtech

That should spool pretty darn well. Did you ever run the charger as a single?

[95cummins5.9]

20°

[Gambler]

How is your spring in the AFC housing, you may try swapping that out.

[JR12]

Originally Posted by zfaylor

That should spool pretty darn well. Did you ever run the charger as a single?

No I never ran the charger as a single. When I bought my pickup it was a completely different setup. hx40 and a 215 pump. I pulled the pump off because the guy I bought it from dropped a plate bolt in the pump ( which he failed to mention until I asked him about it after I had it for 6 months and it got wedged and bent my levers in the pump) so I found a deal on a 160 pump that had been benched by seth at dpe and came with paperwork. and as I replaced that I just got super carried away with mods and now I am where I am now.

Originally Posted by Gambler

How is your spring in the AFC housing, you may try swapping that out.

As far as I know its still the stock spring and in good shape. ill try switching it out.



Im stuck out at work and wont be home until early next week to try all these suggestions and I really appreciate all the help and ideas you guys are giving me.

[JR12]

I just now remembered though that when I got the head ported and oringed they decked it .007 and gave me a .020 over head gasket to use. could that extra .013 be dropping my cylinder pressure enough to where I need more timing? That along with a better flowing head and larger cam possibly reducing velocity somehow? and yes cam was degreed on install.

Im just throwing any thought that pops up into my head right now to get as much information as I can.

[Gambler]

How new is the compound setup? Also, what size inj washer are you using? I don't think that the .013 is much factor...I still think it's in your AFC or possibility of w/g may not be set correctly or sticking...
I'm definitely not the best trouble shooter when it comes to this area as I am new to this and trying to figure similar things out w/ mine.

[JR12]

I pulled the compound setup off of a wrecked welding truck that me and my brother bought. best 2000 dollar investment ever. the welder alone was 15000 new. So I have no idea on the miles but there isn't any excessive play in either turbo.

As far as injector washers if I remember right they were the thicker sealing washers.. don't quote me I don't exactly remember. I bought all new sealing washers for the injectors and return line when I swapped them in from pure diesel power.

how many degrees difference in timing would the thicker washers cause over the thinner washers.

If they were thicker id want to advance my timing correct?