TBI manifold on OLD heads
Don.F.Broadus at ucm.com
Don.F.Broadus at ucm.com
Wed Oct 14 13:16:42 GMT 1998
You might want to try header bolts on the intake. They work well and have a
7/16 head. Get the 1" long ones if they will fit.
----Original Message-----
From: Shannen Durphey [SMTP:shannen at mcn.net]
Sent: Tuesday, October 13, 1998 8:51 PM
To: diy_efi at efi332.eng.ohio-state.edu
Subject: Re: TBI manifold on OLD heads
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
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