I have a cool SU program that works with HIF carbs to give a suggested needle
for
the mods you've done to the engine. Can't remember where I bought it, otherwise
I'd cheerfully share that bit with you. Was only about 5 pounds.
Will also give the likely HP that'll be produced.
Later, Paul A
Mike MacLean wrote:
> Phil,
> Yes, that would be the 1.4" intakes. Of course you will need the
> larger seat machined in
> also. If you only do the intake valve, there should be room. I am
> getting a HIF 1 3/4 inch
> carb from someone on the list that already had a similar setup to this.
> I'll start with his
> needle, but I will have to change it probably as soon as the motor is
> broken in and I can get
> it dyno'ed. You may expect a real "kick
> in the pants" with the setup you are building!
> Mike
>
> Phil Profili wrote:
>
> > Mike - So would that be the 1.4" intakes?
> >
> > I'll need to check with my local machine shop whether there's enough
> width in my inserts to
> accommodate the bigger valves, but I was thinking 1.4" inlets and maybe
> standard or 1.215"
> exhausts. If the inserts are too narrow, I may be forced to stick with
> stock sized valves.
> Also, I've already completed the basic porting as described in Vizard
> (cleaned up the chamber
> and reprofiled the area around the guides).
> >
> > I also have a 1 3/4" HIF44, the Titan manifold and Maniflow exhaust
> header, so I'm expecting
> some reasonable gains over the 1098 I'm running now.
> >
> > What needle do you plan to start with?
> >
> > Phil
> >
> > |-----Original Message-----
> > |From: Mike MacLean [mailto:macleans@earthlink.net]
> > |Sent: Friday, April 18, 2003 12:57 PM
> > |To: Phil Profili
> > |Cc: Spridget List
> > |Subject: Re: Valves - are the expensive ones worth it?
> > |
> > |
> > |Phil,
> > | I am in the middle of building a 1275 head also. I only
> > |live about 5 minutes away from APT and have been over there
> > |numerous times to talk to David Anton. He says, if you only
> > |put Rimflo valves in there and use a larger intake only you
> > |will flow a tremendous amount more air
> > |than stock. This is if you do not even do any grinding as in
> > |Vizard's book. I will be using 1.5 rockers and a 266 cam with
> > |the one size larger intake Rimflo and normal size Rimflo
> > |exhaust. I will also be using a single HIF 1 3/4 inch carb
> > |and exhaust header. David said he has
> > |seen as much a 100 horsepower with this setup! This is still
> > |a tractable street motor. As far as springs go, just use the
> > |normal cheap double spring set and you will be fine.
> > |Mike MacLean-60 Sprite
> > |
> > |Phil Profili wrote:
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