Boost

[guh2stroke]

I installed a custom ground fuel pin on Wednesday(Thanks GL) With the stock fuel pin I was getting a little under 20 lbs. of boost. With the new one I was getting a solid 25. I was leaving a lady friends house last night and I took of from a stop sign and notice that when I got above 14 or 15 lbs. that I heard a rushing of air from under the hood and my boos would top out at about 18 or 19. I checked all my gauges and everything looked good. I climed under the hood and the boost line and all hardware was snug. Anybody out there experience this before? Thanks to all who respond, Alex.

 

[JLEONARD]

Sounds like a boost leak somewhere... . intake plumbing connections, intercooler leak, etc. Tighten all the clamps first and if it persists, you may need to build a rig to pressurize the system to find the leak(s).

 

[guh2stroke]

Would I be able to get arouond with it until I fix the Problem or should I not drive it?

 

[MEby]

dont know of any problems in driving it like that. you will have less power and probably run higher egts though.

 

[Greenleaf]

When I finished tweaking Bill Gilberts pump, he blew one of the boost hoses clean off.



TugboatPhil had one come off too, sometime after I had my hands on his engine. He wrapped them all "tighter than last years swim trunks" with duct tape.



I have had a few hoses leak on the bus engines after I had R&R'ed them. It's generally a pretty loud sound even for a small leak.



There is a seal at the turbo horn too.

 

[sdstriper]

I had similar events after the tweaking began, intake hose kept coming off the BHAF. I built a new intake with the tube a few inches inside the BHAF and more than 3/4" at the rest of the connections, it hasn't popped off since the upgrade.

 

[Greenleaf]

Your BHAF is on the inlet side of the turbo. Boost wouldn't be a factor in it falling off. However, if you tweaked the pump, wouldn't the increased suck tend to keep it on... ... :-laf



Just funn'n

 

[bmoeller]

I would check the bolts that hold down the cover plate on the intake manifold.



Had one heck of a boost leak going to TX last year. Had a bad boot and had to tighten up the manifold bolts.

 

[sdstriper]

Your BHAF is on the inlet side of the turbo. Boost wouldn't be a factor in it falling off. However, if you tweaked the pump, wouldn't the increased suck tend to keep it on... ... :-laf



Just funn'n

I'm just adding my 1/2 cents worth, that air cleaner tube coming off made a noise I tell ya.

 

[dpuckett]

Dont forget your cheap pot metal AFC line. If you break wind in its general direction, it is GUAANTEED to break, split, or crack.



Daniel