Boost On Production Build Date

[Foot Performance]

I was told that the early low number syclones would probuce more boost and were faster closer to 13 flat but were burning up pistons and for the later higher number they truned the boost down and were running like 14 sec quarter mile e/ts


SO is this true and if so before getting crazy should you do enternal changes???


just wondering mine is all stock but when this guy told me this i though if this is true surelly iwould have heard of it buy now

thanks
brandon

 

[warmpancakes]

Re: Boost On Production Build Date

hes an idiot

 

[alwayscode390]

Re: Boost On Production Build Date

lol...never heard this ---

 

[outlaw1987]

Re: Boost On Production Build Date

No Brandon I don't believe this is true. My truck is 2862 which is pretty far back in the build, its stock with 120k miles on it and what appears to be the stock exhaust and cat, yet I managed a 13.5 & 98 mph at Norwalk. All I did was just give it a tune up ie: plugs, wires, cap etc. when I got the truck and changed the oil. Basically if the truck is running good with no problems then it shouldn't have any troubles hitting 13's not to mention the tires that my truck had on it at the time were near bald. At wot my vdo boost gauge shows about 14.7 which is right, so as far as I know the higher numbered trucks aren't any different than the early builds and the internals are all the same, and If I'm wrong then I'm sure someone will correct me on this.

 

[SY1616]

Re: Boost On Production Build Date

I call BS. I have heard the later number were built a bit better but that could be BS too.

 

[BigBadSmoosh]

Re: Boost On Production Build Date

i doubt the build was ever changed, it would most likely cost to much.

 

[dgoodhue]

Re: Boost On Production Build Date

Nope their was no change in boost. The boost is controlled by the PROM and th eboost target is 13.8psi (yes the stock boost often overshoot the target to ~15 psi). Anyways with the 2 bar MAP and closed loop boost control, it would be very hard for GM to up boost to begin with.

 

[syclomatic]

Re: Boost On Production Build Date

I was told that the early low number syclones would probuce more boost...

I don't think my truck "probuces" anything. lol. My truck is a higher number Sy, and it still hauls ass!

 

[cameronsclone]

Re: Boost On Production Build Date

Sounds like a Q for PAS guy Dale.

 

[Foot Performance]

Re: Boost On Production Build Date

Cool i have a high number to it feels fast so never thought about it, but he has been a mechanic for like 30 years at a GMC dealer that sold 2 (thought that was cool) so i though he might have known
but i am sure there would have been someone here who would have known as well

thanks


O yeah sorry about the spelling haha

 

[turbodig]

Re: Boost On Production Build Date

Only thing different from early to late was a svc campaign prom change for idle issues, and another svc campaign that put a different (lower stall) converter in.

It's entirely possible that the really late trucks on the line might have gotten the svc campaign converter. This would make them slightly "slower" than the early ones.

There were a lot of reasons for performance differences from the factory... most of it had to due with the state of tune of the truck, and the driver.

Later,