170 Cam selection

[ledslinger29]

I'm about ready to order my cam, but I'm having trouble making my decision. I put power brakes on my bronco, so good vacuum is a must. Does anyone have any experience with power brakes and 110* lobe center? Clay Smith says it creates just enough vacuum, Im thinking maybe I should play it safe and go with 112*. The CS cams I'm seeing with 112* lobe center show their power band in a higher RPM range, ie. 2000-5700, vs 1500-5200 for the 110* cam. I'll be honest, if this bronco ever sees 5700 RPMs it'll be because something is very badly wrong. Schneider has a 256H thats 112* lc, with a power band of 1250-4500 rpms. Anybody got any experience with Schnieder cams?

 

[Econoline]

Give Schneider a call, they are very knowledgeable and helpful. The owner, Jerry, generally answers the phone. I put a Schneider 256/262 112 in my 250. I put in a 8" single diaphragm booster and discs up front but I haven't gotten it on the road to test the brakes yet or hooked a vacuum gauge up to the engine, so I can't help you out with that info.

 

[ledslinger29]

I'll definately give them a shout. Did you have to do the degreeing work with the Schneider cam? Is it 4 degrees still?

 

[RichCreations]

I'll definately give them a shout. Did you have to do the degreeing work with the Schneider cam? Is it 4 degrees still?

Schneider grinds their cams at 2deg advanced... I am running a custom cam from them in my 200 for an econoline that I am turbocharging, and very happy with my experience with them, call jerry, tell him what you got, and how you want to use it, be prepared for questions about gear ratios, tire size, and vehicle weight, not just engine specs... Buy whatever cam he suggests (which may be a custom cam not in the "catalog", don't worry, it won't cost more)...

EDIT: I have their 256H, ground at 114vs112...

 

[bmbm40]

Please ignore double post.

 

[bmbm40]

http://www.broncofix.com/viewtopic.php? ... hlight=250

See if this link works for you.

 

[bmbm40]

viewtopic.php?f=51&t=38349&p=280925#p280925

 

[wsa111]

Go with the Schneider 256 camshaft for your application.
Why George at Clay Smith cams keeps on advising a 110 L/C is very bad advise. The 264 cam with 112 L/C is rough enough for a C-4 application.
For street use there is nothing worse than a camshaft with too much overlap.

 

[ledslinger29]

Thanks for the responses guys. Bambam, the links bore ought up topics about fuel injection for me. George at CS is a nice guy, I spoke with him on the phone yesterday and he was able to answer some block questions for me. WSA, is the 110 bad advice due to the vacuum, or something else? Also I like your avatar. I'm from Summerville.

 

[bmbm40]

Sorry I got confused about who was asking for info on tbi. Back on track now.

 

[Econoline]

I'll definately give them a shout. Did you have to do the degreeing work with the Schneider cam? Is it 4 degrees still?

No it came right in on the #'s. I degree'd it and it was a blessing after dealing with a screwed up Erson cam. The advance on mine is ground in @ 2 degree's advanced. I didn't want to use a Clay Smith b/c having a 250 there's no adjustable timing set available and they grind them straight up and recommend advancing 2-4 degree's, doesn't make much sense to me. Grind it to come in where it's designed right? If that doesn't work for you then maybe adjust it. I dunno

Time will tell, but so far it fires right off, idles nice and sounds awesome and quick when you tap the pedal. I'm looking to borrow a dial back light and a vacuum gauge from a friend to get her dialed in while I button up the loose ends in the drive line.

 

[ledslinger29]

This is good. I'll be callin them today

 

[ledslinger29]

Schnieder 248-56H on the way

 

[wsa111]

Ledslinger, the 110 L/C in fine for a camshaft 262 & below. But as the duration increases & you have a stock torque converter the 110 L/S idle vacuum is low & very rough.
With a stick shift the 110 L/C is fine on the Clay Smith 264 cam.
The Schneider cam you ordered is ok with a 110 L/C.
Do you live in Summerville now??? Bill The avatar is my Sun distributor tester.

 

[ledslinger29]

No, I live in Jacksonville, FL now. My sister and parents still live up there. Hopefully I'll be good with the 110 l/c on my power brakes. Jerry talked me in to the 248i/256e duration cam over the 256i/256e.

 

[RichCreations]

No, I live in Jacksonville, FL now. My sister and parents still live up there. Hopefully I'll be good with the 110 l/c on my power brakes. Jerry talked me in to the 248i/256e duration cam over the 256i/256e.

I would trust jerry over any of us, he really knows his cams... and that split duration cam will have even less overlap...

 

[chad]

I got fam in Longboat key, same general area (2 some1 in the NE, usa).
Y R there good "junk yrds" in Lakeland?
Gotten some 170 motor prts frm a guy (& gal) there.

Wonder if it would B worthwhile (not too late) for ledslinger to get
the 'kidney-bead shaped" 170 head frm 1 of my contacts there (A 1 A)?
Any interest?

 

[Econoline]

Good luck Ledslinger, I bet that'll be real nice for your use and needs. Are you staying stock with the head and valves, carb, or using a later head? Any porting? I know the one thing these engines suffer from is lack of breath even with a stock cam. My old 170 would run out of air around 60-65 mph w/ 25" wheels and 3.5:1 in the rear and the stock autolite carb

 

[ledslinger29]

Chad I might be interested in that, if there is one available. Eco, Im staying with the stock head (unless Chad has a lead) I'm increasing the size of the exhaust valves to 1.5, sticking with the stock intake valve size, machine shop says he thinks going with a 1.75 valve for the intake will require significant shrouding. I'm staying with the Autolite 1100 for now, I've got loadomatic with Pertronix for the time being as well. Upgrades for those are in my future, but not sure exactly which way I'll go. I was gonna have intake port on the head hogged out to 1.75 until I figured that it looks like the only thing that'll do for me is make me ready for an 1101.

 

[chad]

PM sent:
4 bronk 170s
( same ol story: application, application, application! )

8^ )