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Is this a waste of $$? MP valves.
https://www.slantsix.org/forum/viewtopic.php?t=3538		 Page 1 of 1
Author:  CrAlt [ Mon Apr 29, 2002 4:23 pm ]
Post subject:  Is this a waste of $$? MP valves.
I have a basic built up slant, 60+ off the head 4bbl/headers, ISKY cam.

Now i went out and got a set of MP "oversized" /6 valves. And I was bumbed out when i held them up to a stock one. I didnt do my research...
These are 1.7" intake (stock is 1.62) and 1.44 exst (stock 1.36). Is such a small diffreance in valves even going to be noticable? I already powered this head...was just going to pull it again to put these in.


cralt@broke.for.now
Author:  Dave M [ Tue Apr 30, 2002 11:06 pm ]
Post subject:  Re: Is this a waste of $$? MP valves.
Quote:
: I have a basic built up slant, 60+ off the head
: 4bbl/headers, ISKY cam.
:
: Now i went out and got a set of MP
: "oversized" /6 valves. And I was
: bumbed out when i held them up to a stock
: one. I didnt do my research...
: These are 1.7" intake (stock is 1.62) and
: 1.44 exst (stock 1.36). Is such a small
: diffreance in valves even going to be
: noticable? I already powered this head...was
: just going to pull it again to put these in.


Ten years ago I removed my head and installed the same valves. I did some small port work and set the head back on the engine. It ran about .250 faster. So I guess it was worth the money. I still used that same valve on last years race engine which ran a 12.120 @ 108 MPH. The only reason I am removing them is because I need more installed height for the new cam.

damuel@kalama.com
Author:  Doctor Dodge (Doug Dutra) [ Wed May 01, 2002 12:53 am ]
Post subject:  Re: Is this a waste of $$? MP valves.
Quote:
: I have a basic built up slant, 60+ off the head
: 4bbl/headers, ISKY cam.
:
: Now i went out and got a set of MP
: "oversized" /6 valves. And I was
: bumbed out when i held them up to a stock
: one. I didnt do my research...
: These are 1.7" intake (stock is 1.62) and
: 1.44 exst (stock 1.36). Is such a small
: diffreance in valves even going to be
: noticable? I already powered this head...was
: just going to pull it again to put these in.


A 225 needs all the head flow help it can get, these valves and a pocket port job will make a difference.
DD
Author:  mark dingbaum [ Wed May 01, 2002 10:47 am ]
Post subject:  Hey Dave, info for you
Hi Dave,

I've got one of the MP ported heads that they made a while ago. I suspect it uses the same valves. While searching for more installed height for a new cam, I used Hughes Engines offset retainers to install their double spring at about 1.80 (have not measured it yet) on these valves. I am using Mark Goodman's roller rockers and have enough room above the retainer.

If you (or anyone else) want details (part numbers) let me know.

regards,
mark


mldingba@rockwellcollins.com
Author:  Will [ Wed May 01, 2002 6:50 pm ]
Post subject:  Re: Is this a waste of $$? MP valves.
The "fast" race cars dont use valves much bigger than that.

Will
Quote:
: I have a basic built up slant, 60+ off the head
: 4bbl/headers, ISKY cam.
:
: Now i went out and got a set of MP
: "oversized" /6 valves. And I was
: bumbed out when i held them up to a stock
: one. I didnt do my research...
: These are 1.7" intake (stock is 1.62) and
: 1.44 exst (stock 1.36). Is such a small
: diffreance in valves even going to be
: noticable? I already powered this head...was
: just going to pull it again to put these in.



slantsix@netzero.net
Author:  Dave M [ Wed May 01, 2002 8:27 pm ]
Post subject:  Re: Hey Mark info for you :)
Quote:
: Hi Dave,
:
: I've got one of the MP ported heads that they
: made a while ago. I suspect it uses the same
: valves. While searching for more installed
: height for a new cam, I used Hughes Engines
: offset retainers to install their double
: spring at about 1.80 (have not measured it
: yet) on these valves. I am using Mark
: Goodman's roller rockers and have enough
: room above the retainer.
:
: If you (or anyone else) want details (part
: numbers) let me know.
:
: regards,
: mark


Regards Mark ?? Not sure about that statement ?

I also have a set of Mark Goodman's rocker arms. They have been used now for four seasons and still look like brand new. For the new engine I will using a set of Comp. Cams retainer that have .050" more installed height. Now I can't wait to try this new engine out.
:
:)


damuel@kalama.com
Author:  rj [ Thu May 02, 2002 11:49 am ]
Post subject:  Re: Hey Mark info for you :)
Where do you get the Goodman rockers?
RJ

rj@flyingcamel.net
Author:  Dave M [ Sat May 04, 2002 8:47 pm ]
Post subject:  Rocker Arms
Quote:
: Where do you get the Goodman rockers?
: RJ


I bought mine from Mark about 4 years ago? I think ?? I payed around $450 ?? Lots of info huh?


damuel@kalama.com
Author:  bud L. [ Sat May 25, 2002 6:35 am ]
Post subject:  Re: Is this a waste of $$? MP valves.
I just went to my local Mopar dealership, looking for the oversize valves. He said they were 'NS1', which means no longer available. So, are they available somewhere else?
Quote:
:
: I have a basic built up slant, 60+ off the head
: 4bbl/headers, ISKY cam.
:
: Now i went out and got a set of MP
: "oversized" /6 valves. And I was
: bumbed out when i held them up to a stock
: one. I didnt do my research...
: These are 1.7" intake (stock is 1.62) and
: 1.44 exst (stock 1.36). Is such a small
: diffreance in valves even going to be
: noticable? I already powered this head...was
: just going to pull it again to put these in.



fglmopar@aol.com
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