Is there anyone running low 15's or faster with stock valves? My car seems to fall flat @ 4000 rpm. I am going to advance the cam, but my dad was thinking the valves were restricting the cam (it's a MP 268 - .460 lift). I think this is a med/mild cam.
Right now I have a new valve job with stock valves and the head is shaved .060. I ported it with a dremel.

I want to get a upgrade with larger valves, more compression and port polish professionally done. But, I wanted to see what I could get out of this set up first.

Does anyone have a recommendation for someone to do the port/polish. All of the local shops around here will install the valves and shave the head, but they don't port or polish. I was thinking about BPE Racing Heads in Palentia, CA.
www.bpeheads.com

Thanks

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"Nothing in all creation is hidden from God's sight. Everything is uncovered and laid bare before the eyes of Him to whom we must give account."

I am running a head with stock, untouched ports and stock valves. But I am on nitrous, which carries it's own oxygen. Run low to mid 13's.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Thanks for the reply.
I would love to run 13's, but I don't want nitrous or turbo. I think 15's or 14's can be had with "natual air".
Anyone doing it this way with stock valves?

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"Nothing in all creation is hidden from God's sight. Everything is uncovered and laid bare before the eyes of Him to whom we must give account."

Certainly people have gone in the 14s and 15s with stock valves. If the engine falls that flat, I would suspect timing curve or carb tuning. These can have huge effects. Of course, you are better off with bigger valves and some good port work as a starting point.

Your cam is also not very big. My guess is you can hit 15s fairly easily with your setup and correct tuning. If you have not mapped your dist advance curve, that is job one. Dont' throw expensive parts at it just yet...

Lou

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Home of Slant6-powered fun machines since 1988

Cam timing could be causing this also. Were is the cam installed? Sounds like it is advanced to much! The more you retard the cam the higher the RPM, but it takes low end power away. This is wye it is so important to degree the cam. :lol:Jim Cox

Don't advance your cam, retard it. Advancing it will cause your mill to fall flat out even sooner.

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Juan Ignacio Caino

Please use e-mail button istead of PM'ing. I do log in sometimes but I'll be answering quicker thru e-mail.

Dart270 - OK I was already planning to put in a recuvred distibutor next week.

Jim Cox - I did degree the cam. It is at 105*. This is the cam I got from Menko. I do not have paperwork for it, but from what I found on the internet, it should be at 104*.
So that means it is 1* retrarded, right?
I was going to put it to 104*.
Should I leave it?

Anyone running/has run one of these cams?

I don't know if the valve lash makes a big difference, but I have mine at 28 intake and 32 exhaust (per the info I found above).

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"Nothing in all creation is hidden from God's sight. Everything is uncovered and laid bare before the eyes of Him to whom we must give account."

So here is the info I found.
http://www.victorylibrary.com/mopar/mpcam-tech-c.htm#6

I also found out that jharris (Joel) was running the same cam with stock valves and was in the low 15's. I sent him a PM, but he hasn't posted in 2 years so ...

This is the post from Sept '03 that I got the below quote from.
http://www.slantsix.org/forum/viewtopic ... ght=#32651
I guess I will set my lash at .022 and get the distributor recurve straight, then see about the cam.

Thanks for the replies.

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"Nothing in all creation is hidden from God's sight. Everything is uncovered and laid bare before the eyes of Him to whom we must give account."

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The worst mistake a boss can make, is not say "well done"

Yes sir. I put in 340 springs.

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"Nothing in all creation is hidden from God's sight. Everything is uncovered and laid bare before the eyes of Him to whom we must give account."

This might be a stupid question, but what carb are you running? Didn't see it mentioned. A 1 bbl will only go to about 4000-4500. A 2 bbl should work OK. A 4 bbl, if the secondaries are not opening, will cause this problem also, since the primaries are generally smaller the a 2 bbl.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

I am running a Edelrock 500. I also thought maybe the secondaries were not opening. I thought it might be my linkage. I checked it the other day and it's OK.

I can change the spring however. There are 5 different sizes. I had the 3 strongest in there at different times. Maybe I should try the weaker springs?

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"Nothing in all creation is hidden from God's sight. Everything is uncovered and laid bare before the eyes of Him to whom we must give account."