TPI center bolt holes
#1
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Location: Texas
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Car: 1983 Z28
Engine: GMPP 350, 92 TPI
Transmission: T-5
Axle/Gears: Auburn gear posi, 3.08
TPI center bolt holes
Anyone have any tips, pics, suggestions on making the four center bolts fit early style heads?
Just elongate them is not alot information. I don't want to ruin my intake.
Thanks, D
Just elongate them is not alot information. I don't want to ruin my intake.
Thanks, D
#2
Supreme Member
Re: TPI center bolt holes
you have to chamfer themtops of the holes in the manifold at the same angle as the holes in the heads,
for the bolt head to rest flat on the surface
the holes in the intake are diffeent angle than the ones in the heads
so counter drilling machining is required
good luck
for the bolt head to rest flat on the surface
the holes in the intake are diffeent angle than the ones in the heads
so counter drilling machining is required
good luck
Last edited by Randy82WS7; 03-21-2007 at 03:20 PM.
#3
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Car: 1983 Z28
Engine: GMPP 350, 92 TPI
Transmission: T-5
Axle/Gears: Auburn gear posi, 3.08
Re: TPI center bolt holes
So the bolts will fit but the different angle will not let bolt head seat correctly? Thats what I thought when I was looking at the intake anyway.
#4
Supreme Member
Re: TPI center bolt holes
yep that is it
chamfer was the word i mean tot use up there
i fixed it
good luck
chamfer was the word i mean tot use up there
i fixed it
good luck
#5
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Car: 87 Camaro IROC
Engine: 305 TPI
Transmission: 700r4
Axle/Gears: 3.23
Re: TPI center bolt holes
some manifolds now come stock with both the 73* and 90* bolt patterns. the intake i have can use both bolt patterns, and there is plenty of surface area for the bolt to hold down the manifold. if your going to drill more holes to accomodate the other bolt pattern, you should also countersink the holes so the head is sitting on a flush and smooth surface perpendicular to the hole.
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Car: 1983 Z28
Engine: GMPP 350, 92 TPI
Transmission: T-5
Axle/Gears: Auburn gear posi, 3.08
Re: TPI center bolt holes
Nope, no pics yet. I was hoping for some but I've been looking at the Edelbrock High-Flo TPI Baseplate at jegs this afternoon. New is always better if the $$$ are there.
Thanks guys
Update. Ordered the Edelbrock High-Flo TPI baseplate from Jegs. $393.99
Thanks guys
Update. Ordered the Edelbrock High-Flo TPI baseplate from Jegs. $393.99
Last edited by JDF-Z28; 03-25-2007 at 11:27 AM.
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