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yet another cam question
https://www.slantsix.org/forum/viewtopic.php?t=17637		 Page 1 of 1
Author:  argentina-slantsixer [ Thu May 18, 2006 8:17 pm ]
Post subject:  yet another cam question
well fellas
got my erson 270º/270º .465" lift today from summit (EXCELLENT SERVICE) This is the highest lift cam I've ever had. I know I need stiffer springs (like those on the 340)

My questions are:

will original pushrods be up to the task?
I lready got a double roller timing chain
do I need to check for valve/piston clearance? I decked the block but I have some negative deck height
318 springs are softer than 340?
cam is already 4º advanced in the grind. Do I need to advance it more or it would be fine that way?
can I use original lifters? (solid)
How does an improved breathing would affect my timing curve? do I have to redial it in? same as for carb specs... richer? leaner? what?

on another note, those assymetric lobe profiles looks great! you can notice them naked eyes...

Sorry to overwhelm you guys with uestions but I'm as excited as a baby boy with a brand new choo-choo- toy :lol:
Author:  slantzilla [ Fri May 19, 2006 7:32 am ]
Post subject: 
I'll answer the ones I can:

Stock pushrods are fine.
318 springs are about the same as stock Slant springs. Save yourself the headaches and have the machine work done for 340 springs. (I do not think they are a drop-on.)
Do not reuse old lifters on a brand new cam
Take the time to degree the cam. I would install it right at 104*.
You will have to play with timing and jetting once the motor is running. :shock:
Author:  argentina-slantsixer [ Fri May 19, 2006 8:03 am ]
Post subject: 
thanks slantzilla.

wasn't planning on reuse lifters, in fact I sold my previous cam to a friend and he's getting all my lobe matched lifters (I'll sort them so he can drop em in the correct lobes)

IIRC cstryker said that 340 springs are drop in replacements... if not I'll check on some "non-head-machining" solution (since I won't be pulling the head because I'm building another one and I want to save the hassle for the new head installation.

As far as for timing and jetting... I'm guessing that would need more jetting... but as far as for timing I'm stumped. I have my ist recurved, I run 15º BTDC initial 28ºBTDC total (sees a lot of wot or near wot)

I'm restless with this :lol: I want a peppier slant... I moved on to a 833 and with my previous mill and 904 I used to eat up some stock 318 and ricers... I want to go for average mild hopped up 318 with rice now :lol:

How cool is the "is that a SIX????" look on v8 guys when you beat them?
Author:  argentina-slantsixer [ Fri May 19, 2006 8:06 am ]
Post subject: 
dumbass me... I meant "Can I use STOCK typoe solid lifters?"
Author:  Dart270 [ Fri May 19, 2006 8:37 am ]
Post subject: 
When I did 340 springs, they dropped in with no machining.

I would degree in the range 102-104.

Timing should be 10-15 deg initial, 27-30 deg final (mech only).

I may try this cam myself with a stock converter and see how it works. Let us know how yours goes. :twisted:

Lou
Author:  argentina-slantsixer [ Fri May 19, 2006 11:34 am ]
Post subject: 
Too bad I swapped the 904 out for a 833, I think that it would have worked with a stock converter. The cam already has 4º advanced grind. should I advance another 4º? wouldn't that be too much?
Author:  Dart270 [ Fri May 19, 2006 12:51 pm ]
Post subject: 
I assume you mean their spec is 107 centerline? That's V8 territory. I wouldn't go past 104 deg installed.

A good rule of thumb from my experience is that if the same cam is used in a V8 and uses 108 centerline, install it 6-10 deg more advanced on a 225.

My 64 Dart ran best with 97-99 deg centerline (wilder cam). :shock:

Lou
Author:  CStryker [ Fri May 19, 2006 3:54 pm ]
Post subject: 
Quote:
well fellas
got my erson 270º/270º .465" lift today from summit (EXCELLENT SERVICE) This is the highest lift cam I've ever had. I know I need stiffer springs (like those on the 340)

My questions are:

will original pushrods be up to the task?
On my build I used the replacement lifters and pushrods listed for a stock slant. About 2000 miles later, it's still going strong with no signs of problems. The stock pushrods even work with .090 off the head.
Quote:
do I need to check for valve/piston clearance? I decked the block but I have some negative deck height
I doubt it; even w/ .090 off my head, there are no clearance issues.
Quote:
318 springs are softer than 340?
Stock applications, yes; many aftermarket cam grinders reccomend the heavier 360 springs for both, iirc. I used the Comp Cams springs that they listed for their 360 cams. (not sure how close they are to stock 360 spring sizes, but, I know they are heavier.) They /just barely/ cleared the outside of the spring pocket; (I think) they are spec'd 1.50 OD, and the pocket is also 1.50 OD according to my calipers. And that's measured after the head was hot-tanked and all the crap cleaned out of it. If yours is dirty at all, plan on having to scrape crap out of the pockets so that the springs seat properly.
Quote:
cam is already 4º advanced in the grind. Do I need to advance it more or it would be fine that way?
As far as cam installation, I put mine in straight up, and I'm really happy with it.
Quote:
can I use original lifters? (solid)
see above
Author:  argentina-slantsixer [ Fri May 19, 2006 5:23 pm ]
Post subject: 
lou
according to their spec card, the cam has 4º advanced grind if you install it straight up as cstryker did. I'm planning on do the same (installing it straight up)

as far as springs are concerned, I think I might go with summit part #DCC-4120249
outside diameter 1.497" .500" lift range .206 wire diameter
$6.88 each

does that sounds good?

I've been trying mancini racing but either their website is shut down or I can't connect with their server
Author:  Dart270 [ Fri May 19, 2006 7:49 pm ]
Post subject: 
Sounds good. I think those springs might be the factory 340 springs.

Lou
Author:  argentina-slantsixer [ Fri May 19, 2006 8:54 pm ]
Post subject: 
Quote:
Sounds good. I think those springs might be the factory 340 springs.
Lou
thought so... those are mopar performance springs... one step better than the regular stockers 340 springs (wire diam on 340 stock springs are less than .200) ... mancini has them for 6.50 a piece (not much big diffrence) but they aren't exactly happy with doing business overseas... summit guys really treated me klindly, they shipped fast, the actual cost was lower than the original quote and they gave me a bunch of extra goodies like decals, hat, flag, etc etc. catalogs and spam mail!! hehe

sorry my bad writing, i have cotton gloves on and urea lotion to take some grease out of my hands.... been fidling with my 833 and that moder was heavy and greasy as hell.
Author:  emsvitil [ Fri May 19, 2006 8:58 pm ]
Post subject: 
Quote:
sorry my bad writing, i have cotton gloves on and urea lotion to take some grease out of my hands....


Urea lotion.........

What are you pissing on your hands for?
Author:  argentina-slantsixer [ Fri May 19, 2006 9:17 pm ]
Post subject: 
Quote:
Quote:
sorry my bad writing, i have cotton gloves on and urea lotion to take some grease out of my hands....


Urea lotion.........

What are you pissing on your hands for?
hehehehehe

urea removes some superficial layers of "bad, Bad skin" and leaves a smooth finish... (the wife appreciates that, otherwise she feels like being sanded :lol: )

This is funny: the stuff (Uremol 20) is made in Québec, Canada, by TransCanaDerm inc. for stieffel (my dad and grandpa are dermatologists so I get all the good imported goodies... hehe) is urea 20% (10% is for ladies face) and takes good care of occupational dermatitis (aka as greasy fingers.. :lol:)

After years of restoring vintage $#!+ like sax, cars, furniture, etc... (ya know, is not the same with some materials if you work with glasses, gloves, breather masks, etc... is like using full body condoms.. very safe but very boring...) and abusing and using my hands, I can actually polish a replated piece (say a sax key that's been replated straight off the bath) rubbing my fingers over it. Mirror finish, like a good burnishing, even better that a piece of rag and good polish compound. That's how abrassive mistreated dry skin can get....
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