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Torn between Erson Cams...
https://www.slantsix.org/forum/viewtopic.php?t=25817		 Page 1 of 2
Author:  moparfreak77 [ Mon Nov 12, 2007 12:34 pm ]
Post subject:  Torn between Erson Cams...
Hopefully getting into my rebuild this winter and don't know what cam to get. E470301/254 or the E470621/270.
Basically, what more does the slant have to be modified for it to use the 270?
What would be a good build for the 254? how about the 270?
thanks
Author:  Aggressive Ted [ Mon Nov 12, 2007 12:41 pm ]
Post subject: 
Author:  emsvitil [ Mon Nov 12, 2007 3:41 pm ]
Post subject: 
If you're looking at the 254, there's a 2 special versions that was Doc came up with erson

The 244 MP "clone" cam has been named RV10M-212/.295
http://www.dutra.org/pictures/engine/er ... m-212-.jpg

The next step up has been named RV15M-212/.295
http://www.dutra.org/pictures/engine/er ... am60bd.jpg
(i think this is it)
Author:  dakight [ Mon Nov 12, 2007 4:23 pm ]
Post subject: 
The advice I'm getting for my Erson 270 is to bump the CR up to around 9.5:1 and use a 3.23:1 rear gearset and a little bit looser torque converter. I think I'll shoot for a 2800 - 3000 stall on the converter. The 270 moves the peak torque and HP up the RPM scale a bit.Initially I'll be using a "super six" conversion but will probably swap that out later for either a 500 cfm Holley 2bbl or some sort of 4 bbl setup.
Author:  1974duster kev [ Mon Nov 12, 2007 5:12 pm ]
Post subject: 
I like the 270 personally works well for me

.100 off the head
3000rpm stall converter
stock gears (hopefully 4.10's soon)
clifford headers
clifford intake
390cfm holley 4bbl
(soon garage head work better valves)
street/strip in the 904 shift kit
misc ignition and electical stuff
and new bottom end stock pistons
270erson cam with valves springs/lifters
thats about all i can think of on the top of my head engine wise.
it works well for me. plus just sounds better a little better rump i got my 270 on a 108 lobe instead of the normal 111
Thanks, Kevin
Author:  moparfreak77 [ Mon Nov 12, 2007 5:38 pm ]
Post subject: 
Mine is a total daily driver. I put on over 6000 miles this year (first year I've owned it). Plans for mine are stock 2 bbl setup, shaved/port/polished head, electronic ignition, Dutra Duals, dual exhaust. stock tranny (what would be a good stall speed?). Not sure on the gears, might be down the road with the BBP axle swap. Basically not all that aggressive, MPG are a must, but would like more torque. Top speed doesn't mean anything to me. Would the 270 be to much for this setup? thanks guys.
Author:  dakight [ Mon Nov 12, 2007 5:47 pm ]
Post subject: 
I'm probably not the best source for a definitive answer, but it sounds to me like the 254 might be just about what you need. You might also look at one of the dual pattern grinds that Doc speced out with the Erson folks. He can give you the info on that.
Author:  argentina-slantsixer [ Mon Nov 12, 2007 5:48 pm ]
Post subject: 
I purchased 2 erson cams in 270° flavor back when summit had them in stock. One was installed in a friend's car, stock 904 tranny and TC (well, actually transmission was upgraded with kevlar bands and V8 guts) we had a customized 2bbl 500 cfm holley, increased compression (9.5:1) reworked ignition curve and mild gears (3.31:1) I'd say that the car was really fun to drive. The engine hop up modified stall (at least, stall seat of the pants feel) and it was a pretty ice and funny ride. I sold my cam to a buddy who's more advanced in his project, but I'd buy the 270 anytime for a stock build. In fact I'd be using a 280 or 290 for a N/A future build, and will have to learn about turboing one slant I already have there. Short version: go with the 270, you'll like it.
Author:  sandy in BC [ Mon Nov 12, 2007 6:10 pm ]
Post subject: 
If you are going to do head work get the 270.

I run a BBD with a Comp 264s and 9.25 CR and it was tame enough to make me order a Erson 280.
Author:  argentina-slantsixer [ Mon Nov 12, 2007 6:27 pm ]
Post subject: 
Quote:
If you are going to do head work get the 270.

I run a BBD with a Comp 264s and 9.25 CR and it was tame enough to make me order a Erson 280.
ditto
Author:  Doctor Dodge [ Mon Nov 12, 2007 7:48 pm ]
Post subject: 
The key to making that 270 cam work... more compression.
Use this cam if you plan to carfully measure you piston deck height, cc your head and 'crunch the numbers' then adjust the compression by milling the head / block.

If you don't want to increase compression, use a smaller cam.
DD
Author:  Dart270 [ Tue Nov 13, 2007 8:01 am ]
Post subject: 
I would also vote for the 270 with 9 - 9.5:1 comp and some headwork. That should work well with a stock converter, but could also benefit from a 2400-2600 stall, which will not sacrifice driveability or mileage hardly at all and will greatly increase fun factor.

Lou
Author:  emsvitil [ Tue Nov 13, 2007 12:43 pm ]
Post subject: 
Quote:
I would also vote for the 270 with 9 - 9.5:1 comp and some headwork. That should work well with a stock converter, but could also benefit from a 2400-2600 stall, which will not sacrifice driveability or mileage hardly at all and will greatly increase fun factor.
The problem I see with the bigger cams and higher stall is when you leave the automatic do it's thing................

My 904 shifts (WOT) out of 1st at around 3000 rpm and 2nd at 4000 rpm.... won't get much work done in 1st with 2500 rpm stall
Author:  Dart270 [ Tue Nov 13, 2007 1:20 pm ]
Post subject: 
The early 904s are notorious for this. Once you make more power, and make sure the kickdown gets pressed all the way back at WOT, then they will shift higher. Also, I have no personal resistance to shifting it manually to reach a higher RPM in 1st or 2nd - why not?

Some valve body mods will also allow higher RPM auto shifting.

Lou
Author:  moparfreak77 [ Tue Nov 13, 2007 3:39 pm ]
Post subject: 
Quote:
The key to making that 270 cam work... more compression.
Use this cam if you plan to carfully measure you piston deck height, cc your head and 'crunch the numbers' then adjust the compression by milling the head / block.

If you don't want to increase compression, use a smaller cam.
DD
What do you gain with a dual pattern cam? Are they available in the Erson Group buy?
How far down is the piston in the hole stock?
Is there a "cheap" way on cc'n my head?
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