I'm thinking of swapping out my SR for a MR, anybody running a MR & 219 setup? Did it add anything on the high end? Bottom end suffer a lot or a little? Any dyno pulls?

Dave :thumbs:

 

Dave, i could be worng, but i wouldn't recommend it. To me, for a serious racer such as yourself, the MR should be accompanied by a solid cam. The MR wants to make power in the 5000-7000+ rpm range and hyd valve trains are tough to keep stable up there. And the 219 would be especially tough because of its aggressive ramps. Couple that with the fact that a 219 is a pretty small cam for a 420. I think you would loose your monsterous low end torque and not get enough payoff in the HP becuse of the rpm limiting cam & valve train. That's my 2 cents

BTW, how many cars can do what yours is doing in the picture above with such a small cam??????????


[Modified by ralph, 3:10 PM 9/22/2003]

 

I notice the picture of your car and how the front end comes off the ground. I know a mechanic who could fix that for you. (just trying to be helpful)

 

Gee i thought this thread would get a bunch of hits.

I'll try to run this thru my sim later and send you a note.

 

:nono:

The Mini Ram definitely isn't the hot ticket for that combo. If anything, maybe a 236/244 mech roller cam.

Other than that, keep hanging those wheels and enjoy it! You can't possibly be bored of going mid 10's@125 already? :jester

 

Ralph,

The cam is small for the MR but look what Phil did with his MR & small cam combo.

JH,

You mean he can make it come up higher, yeee haaa? :jester

Jay,

It's starting to be a bus ride after it leaves the line :D ! However, yesterday they sprayed the track for the ProStocks to test and I made the third pass after them. Hooked up the best it ever has, they guy behind me said it picked 'em up a foot & 1/2(all I saw was treetops & sky) and carried the wheels on past the 60' marker. It went 1.402 ON THE REAR WHEELS :cool: ! Now that was fun!

Next question has anybody plumbed braided to the stock TPI fuel lines? I looked at mine and want to run braided from the fuel filter to the rail and from the rail to union on the return. Anyone know the size of the original fittings? My rails are fitted with -6 AN fittings so I need the other end into the factory lines or an alternative solution.

Thanks Dave :thumbs:

 

Dave, I thought a MR user should add their 2 cents. I ran the MR with a ZZ9 cam. The 219 cam and the ZZ9 are very similar cams. Your MPH and ET are way out of synch. If you want to add some MPH to your ET slip, then put the MR on.
I have a used MR to sell all you sceptics. Its $600 now or $1000 after Dave's SR to MR swap. :lurk:
Just Do it.

 

This ought to be one real good test. According to the sim it should actually be quicker/faster with the MR. I guess the 420 cubes overcomes much of the low end torque loss. As you might expect the curves look totally different with the SR making more power until about 5000-5200 rpms where the MR takes over. I had to assume that you can hold off valve float until 6600 rpms which might be possible with a good valve train....a rev kit might help as well. Putting that into the drag sim and increasing you shift points to 6400-6600 yielded a 10.49 @ 127 which is about 6mph faster than the SR (i've never been able to get the sim to your current mph). The short times were only affected by about .02.

I'm assuming your gears are 4.10s with 28 inch slicks and your car weighs in about 3000lbs with the TH350 and 3800 stall. I'm also assuming speed density system. Let me know if any of that is way off. And of course the sim assumes perfect tuning.

This should be interesting.....when are you gonning to do it?


[Modified by ralph, 8:45 PM 9/22/2003]

 

try it with just the mini ram you could allways change it latter :cheers:

 

Ralph,

Try 4000 stall, 29.5" tire and 6000 shift points.

Corky,

As a SR user you know what a PITA it is to remove & install, so I'll change the intake first then the cam. I figure a cam change has to be easier with the MR.

Jay,

I have that cam in my 383, it could be next!

Phil,

You help talk me into this, you're on call!

Dave :cool:

 

Phil,

PS, I like your new avatar! :thumbs: When I grow up I want one TOO! :D

Dave :jester

Did ya' notice the smiley faces match my car :D !


[Modified by hookedup, 10:48 PM 9/22/2003]

 

Ralph, Corky, JD, JH & Phil,

The parts are on the way, I'll be changing it over ASAP :eek:

 

Am I the only SR fool that thinks it isn't that bad? :D

 

Dave

Keep us posted on how it runs with the "New Stuff" :cheers:

 

Dave, you mean you are shifting at 6000 rpms now :crazy: Damn, mine starts suck'n wind at about 5500 and is really dragging it's butt by 6000. I would think that your 420 would have a hard time just getting to 6K...LOL!!!!

Funny thing is, i'll bet the sim likes the higher shift point.....i know it does for my car, but it really doesn't work that way in real life....i usually have to fudge the shift points a little to make the sim work right. Anyway i'll rerun the numbers, but i dont expect them to change much. After the MR, the sim likes your shift points at about 6600-6700.....although i have forced the sim to hold off valve float.

Scorp, you're not the only one. Dave's car proves there's more potential in these superrams than i ever thought. 10.6 @ 125 with a tiny cam and enough torque to pull the tower!!!! that;s pretty damn impressive if you ask me. But Dave is hardcore....so now it's time to look for more....LOL!!!!

Wait, i just reread the premise of your post and Yes Scorp, you're the only fool that thinks it's not that bad. But then again, you've rebuilt your engine in the car outside in the driveway...so i guess you're hardcore too :lol:





[Modified by ralph, 2:36 PM 9/23/2003]

 

Am I the only SR fool that thinks it isn't that bad? :D[/QUOTE]

Its easy with the right tools..

 

Quotes
"Its easy with the right tools..Am I the only SR fool that thinks it isn't that bad?"

You guys ain't right :jester ! You might need professional help :rofl: !

I took the MR off & had it on the bench in less than 10 minutes, the only tool I could use to do a SR that fast is a "blue tip wrench"! :eek:

Ralph,

I am shifting ~5400 now, but the next cam(!) could go 6000+.

Dave :cheers:

 

Dave that makes more sense. Although, I think the sim factors shift points based on where they land, and not where you shift. ie if you shift at 5400 it probably hits close to 6000 before dropping the rpms for the next gear (i have to factor that into the sim for it to be accurate). I know mine is about 500 higher than my shift light is set. I shift at 5600 and my memory tach shows the peak at 6000-6100...every time. With your additional torque, i'll bet you hit 6000 or higher before it lands. If i programmed you at 5400, it would kill your ET.

 

Ralph,

As crazy as this sounds I'm pulling those shift points off Diacom captures, those are the actual shift points!

I set the trans up as a full automatic, put it in drive & stab it! Functioning governor & vacuum modulator, I can manually shift it but haven't yet. I'm still experimenting with different govenor weights & springs to change the shift points, haven't made any major difference in et so far.

Dave :confused:

 

So 5400 is the peak? If i put that into the sim, it gives me a 10.73, almost a tenth slower. I know for my car varying shift points has little affect on ETs. I've tried shifting from 5000-6000. At 5000, it slows it down some, but not nearly as much as the sim would have you believe. So far, using the peak rpm has been fairly accurate......but if your PEAK is 5400, i'm off a little. I;ve never been able to get your trap speed right either......hmmm

btw, what was the DA when you ran the 10.60?