Bill,
That is the proper spring for cams with lifts greater than .500. The engine
we are building up, we are using a Crane special grind (P/N 70HR00003).
Lift, intake - .467, exhaust - .520 with 1.6 rockers. The other valve
components are by Crower. I wanted the higher installed height that the
Crower springs and retainers provide. The heads are almost done (all that is
left is the final touch-up and flow verification). We may run the 1.7
rockers but it depends on the final flow numbers that we see. This is the
first set of heads out of the Landy's with 1.970 intake valves. I decided to
run these instead of the 2.02 valves primarily because of the fact that the
engine will be a daily driver. I haven't checked out the Crane spring, but
they were very adamant about running it. I really don't know if the spring
seats need to be cut for the spring. Given the fact that it is a dual
spring, I would suspect that the seats do need to be cut. Robert Landy
broken quite a number of the RT springs, that right there is good enough for
me to stay away from them. As far as injectors, we will be running the 30
lb. injectors. The factory fuel pump is large enough to support them and
according to our calculations, we need the larger injectors to develop the
power we want. The injectors are Lucas and I get them from RC Engineering
out here in Calif. The engine controller will need to be touched up but this
is no big deal.
TTYL - Frank
> -----Original Message-----
> From: WillTier@aol.com [SMTP:WillTier@aol.com]
> Sent: Wednesday, September 08, 1999 1:56 PM
> To: dakota-truck@buffnet.net
> Subject: Re: DML: Turbo vs Supercharger; Attn. Patrick.
>
> In a message dated 9/7/99 11:09:26 PM Eastern Daylight Time,
> Frank.T.Holloway@KP.ORG writes:
>
> << Take a look in Crane's catalog. Crane actually makes them for MP. They
> have
> a different spring they recommend when lift exceeds .500. P/N on the
> Crane
> Springs is 99838. This spring is a dual spring seat pressure 110 lbs.,
> open
> 330. With this spring valve float should occur around 6,500. I have a
> hunch
> that the MP catalog is incorrect. Either way, Crane recommends and
> prefers
> that you run the above one..... >>
>
> Frank
>
> The crane number above is for the proper spring ? And if so will the MP
> retainers and keepers work with them ? And what about the Crate 380 using
> the
> R/T # with a .513 lift ? It's confusing :-) Also if this is a dual spring
>
> then the head would need to be milled, right ?
>
> Still need to get a hold of ya about them Injectors but gathering info on
> performance or lack there of and will get to ya when I have done
> gathering.
> Also looking fo anohter MP Comp to mess with.
>
> Thanks
> Bill
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