I read about the boost actuator adjustment on one of the other boards and was thinking about doing this adjustment.

I went out and looked at mine and the actuator is sitting on there crooked. It is a pretty noticable angle. I have to get to my shop and get a swivel so I can adjust it.

Do you think the adjustment makes a difference. My boost guage (the factory guage) which I have heard is not very accurate reads only about 6-7 psi and has not been higher than that as far as I have seen.

Is this adjustment a good idea?

Also is there any good tech notes or manuals out there on our trucks. I would like to get my hands on some kind of factory service manual or something of the sort.

Any ideas
Paul

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2001 Silver Lightning
Stock.....for now....

 

One thing I'd like to point out is the fact that the actuator is put on differently from the factory from unit to unit. Most are w/in problem exact tolerances and then I'm sure there are some that are way off. This might explain why some dyno lower than the others.

BfB

 

Can you explain to me when your engine looses vacuum and the actuator goes closed how you can make more HP from one engine to the other as long as the bypass butterfly is closed? Unless for some reason it's not closing completely....(I seriousily doubt that).

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99.5 Lightning
Gone but not forgotten
01 picked up on 5/5/01
hud@mc.net

[This message has been edited by JeffsLightning (edited 06-11-2001).]

 

Well obviously you do not make more hp and I beleive the idea is that if it will close a little faster it might help the boost come on sooner. That is what I gather from reading all the info.

I just spent about two hours playing with different settings and I can tell you on my L I can't see a difference. It actually felt a little worse at the furthest up postion. And after screwing around for a while and running the truck down the street in between changes I ended up back at where it was set before.

That is my story and I'm sticking to it.....

Paul

P.S. Maybe I did something wrong, but I could not get my boost to come on sooner. It starts to come on about 2000 rpm and if just part throttle it gets about 2-3 psi and if at wide open it jumps to about 6 maybe 7 psi. I don't know maybe that is the best I can get for stock.



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2001 Silver Lightning
Stock.....for now....

 

You're absolutely right, but I wasn't stating that one makes more power than the other in terms of peak output, but what I was getting to was lower hp #'s and tq #'s. It'll obviously change at when the boost comes on, so therefore how some produce higher #'s down lower, etc. I should have clarified this.

BfB

 

pgio
Jeffslightning is right, changing the adjustment of that boost canister only changes how quickly the bypass butterfly closes.

If you make that adjustment that everybody is doing and your engine responds positively, then I think what your engine is telling you is it needs a fresh blower drive belt. ( sorry, my opinion)

When you raise the canister up, it slows down the rate of butterfly closing and actually takes a little pressure off of the blower drive. Its like a shock absorber. The blower belt won't slip as quick.( remember it takes over 50hp to drive that blower and make 10 lbs. of boost)

Also from what I've gathered on these boards is this, the 01' trucks don't seem to make quite as much boost as the 99/00' trucks.
WHY? In my opinion the 01' intake and intercooler do indeed breath a little better and because there is less restriction, there is a little less boost. But that doesn't mean the truck will make less HP, it just means its breathing better. There is less restriction. (my opinion, only)
Dale

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Black 00'
12.857 ET
110.49 mph
full weight, stock F1's