turbo whistle in tuning?

[lotsofmiles]

My truck has a loud and long turbo whistle, espically right when you let off the pedal, coming to a stop. Its loud and I like it.

For being the same engine, and both are straight piped, the vans whistle isnt as loud or long.

Is it in the tune. I'm guessing there might be some other factors too, but if I copy over the boost and vane tables from the truck tune to the van will it be close?

I did script the tune from the truck to van, but I think it would be an instant tranny killer looking at the tq level differences between what the van has stock and what the scripted tune shows

 

[wikdlmm]

It should b. Close.. I no I can change mine at idle an I like it.. Changing the vane tables shouldn't hurt give it a shot

 

[lotsofmiles]

i was going to just copy the entire boost and vane tables over from the truck to the van...

 

[wikdlmm]

U can it shouldn't make a diff other than the truck is tuned with that boost an prolly has fuel with it.. Mite run diff on the van but it's not gonna hurt to try it

 

[wikdlmm]

An I would just do the vane tables not the boost

 

[lotsofmiles]

thanks, i'll try just the vane tables first.

 

[lotsofmiles]

copied vane tables from truck to the van. might have made the whistle longer but not much and not any longer.

 

[LarryJewell]

copied vane tables from truck to the van. might have made the whistle longer but not much and not any longer.

you might start out changing the vane tables from 0-5mm3 and from 1200 rpm to 4800 rpm to "65" across the board, this should give you the whistle once you let out of the throttle and coast dwn to a stop.

 

[LarryJewell]

then increase that number to your liking

 

[lotsofmiles]

Ok, here is the vane table. I copied it from the tune I'm running on the truck and put it on the van. I drove both the van and the truck about 100 miles each today. The truck turbo whistle is alot louder than the vans. Its got to be something else.

Both are 4inch cat delete, and straight piped. both have stock down pipes, is that the difference?

I thought I looked up the turbos once and iirc they were the same....


the van has a similer whistle, just not as long or loud

 

[lotsofmiles]

i pulled the resognator off the van today and that did it.
lost the restriction meter, its on the resognator on the van.

thanks again for the help.

 

[Diesel Pilot]

you might start out changing the vane tables from 0-5mm3 and from 1200 rpm to 4800 rpm to "65" across the board, this should give you the whistle once you let out of the throttle and coast dwn to a stop.

x2, I get a really long "wind-down" whistle with this method. Sometimes run it on boost just to hear it spool down. It's fun.

 

[jason86]

i have a friends truck tuned with 15% in the 0-20 mm3 and 0-1000 rpm for the lb7 idle and it whistles pretty good on coast down. before i wreck his turbo do you think i can run lotsofmiles numbers in the 0-5 mm3 and 800-2400 and have the best of both worlds with the lb7 idle and the coast down whistle?