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Early vs.Late parts...long
Does anyone have any track times for a new intake style vs. old style
comparison? I hear the late model ones are better, but don't know how much
truth there is to it.I wouldn't be suprised if the differance was
negligable, but that is jus speculation.
The later intake also has the injectors pointing at the valve instead of
aligning with the intake's runners.
This is precisely why I am doing my mods in a systematic order. No one
ever really wrung the nuts out of an 84 setup. By the time anybody wanted
to modify their 84, the later stuff was out and people just changed it all
as a matter of course. So, no real develpoment has been done in this area,
as far as I know.
I personnally don't think the early manifold is any sort of hinderance.
This is mostly based on comments from Rick Byrnes, who said that the
redesign was done for packaging commonality issues with the Ranger truck.
Carl says that 30 #ers are sufficient until you're running 95 mph in the
quarter. I don't know where he got that, but it seems plausible. At 91 MPH
and 17-18 psi of boost, I'm still way rich at full throttle.
My intent is to go as far as possible with the "bad" pieces, until that
piece becomes the bottleneck. And I already have the later stuff in the
garage, I'm just curious...
I can say this though. The early cam is way too small. Ditch that thing
for at least the FMS -A231 cam, which incidentally, is the same as the
later SVO cam, and also all of the 5 speed Merkur XR4ti cams. If you buy a
Merkur 5 speed head, then you got it in the deal. Or get the Engle from
me, for a nice improvement. Again, in back to back testing, my 84 SVO was
as fast at 10 PSI with the Engle cam, as it was the night before at 17 psi
without the Engle cam. I also have a brand new -A231 cam and a couple of
various used cams, for sale, if anybody is interested.
BTW, I was experiencing a little bit of rattling last Friday night, so I
thought to myself, "self, if I now have control over the boost with the
bleed valve, then I can back off of the timing with the unleaded/premium
switch." I thought this would prevent the clatter. So, I switched it to
the unleaded position. It did retard the timing, but I only ran a 15.5 @
88 MPH, againsta Saturn. This was the most even race you could ever see. I
was faster and quicker, but he cut a very slightly better light, and took
the win. We were right next to each other, the whole way. Yuk, switch
back on, 14.95 @ 91 MPH. So that's what timing alone will get you!