TBI manifold on OLD heads

[Shannen Durphey]

Kevin Vannorsdel wrote:
> 
>  Shannen,
> 
> Did you use an Edelbrock manifold or a stock one...   There is no way I can get
> a standard hex bolt into those center holes...  I have been using these short
> 12 point bolts which still barely get into the hole without banging on the
> vertical part of the manifold.   This is a BIG hassle ---   I gotta start them
> with a needle-nose pliars and eventually can get a box end wrench on it...
> 
> Did you have these problems?
> 
No, I used a stock manifold.  But I might have used a carbide burr to
open up the area around the base.  I don't remember doing that, but if
the manifold had enough material and I needed the room, I definitely
would have.  Would Allen head cap screws work better?  You could use
blue loctite on them for a worry-free installation.

Shannen

> ________________________________________________
>   Kevin Vannorsdel     IBM Arm Electronics Development
>     408-256-6492                Tie 276-6492     kv at us.ibm.com
> 
> owner-diy_efi at efi332.eng.ohio-state.edu on 10/13/98 12:07:38 PM
> Please respond to diy_efi at efi332.eng.ohio-state.edu
> To: diy_efi at efi332.eng.ohio-state.edu
> cc:
> Subject: Re: TBI manifold on OLD heads
> 
> I've done it, and it worked.  But it was not very aesthetically
> pleasing, and I had to spend a bunch of time on it.  It leaves you with
> large slots in the center, which I was able to cover with some special
> washers I made.  I used shouldered bolts from the original manifold/head
> combo.  Can't tell you if they came loose, the vehicle has never been
> back to the shop.  But I have no reason to suspect they would have.  No
> torque wrench, just like many older carb. manifolds.  this is where the
> "calibrated elbow" is practical.
> 
> Shannen
> 
> Kevin Vannorsdel wrote:
> >
> >  I guess this is EFI related...
> >
> > Has anyone out there been through the exercise of modifying a TBI manifold (SB
> > Chevy) to fit onto a 350 with the "old" heads.  This involves slotting and
> > re-angling the center holes.
> >
> > I did it a year or so ago -  and have a few questions/problems-
> >
> > 1)  What bolts did you use to mount the thing?
> >
> > 2)  Have they ever come loose over time?
> >
> > 3)  Were you able to use a torque wrench on the center holes
> >
> > Any thoughts are welcome!
> >
> > ________________________________________________
> >   Kevin Vannorsdel     IBM Arm Electronics Development
> >     408-256-6492                Tie 276-6492     kv at us.ibm.com