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Old 04-17-2012, 03:49 PM
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sbc cam selection ????

looking at changin my cam/lifters to something other then boring smooth idle... maybe....
i now have summit K1102 and have used summit K1107 lopy idle. was ok but very cold natured. i'm thinking about summit K1104 with fair idle. but i don't know what a "fair idle" is ???
355 sbc with some goodies inside, but basicly stockish. 2400 stall and 3:80 rear gears, air gap, 600 edlebrock... i'd even consider a solid lift cam..
opions please ..... tks

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Old 04-17-2012, 09:10 PM
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You need two things.......

9.5:1 or better CR........a cam with an LSA of 110 or LESS.
Don't know what kind of car this GM engine is going in........the little roadster you have a picture of?
Important because.....if its a light weight car to begin with a rad cam will be more drivable.
The cam you had before had ALOT of duration and a wide LSA.
Shorten up on both.
You know what a circle/dirt track engine sounds like? You like that kind of idle?
106-108LSA......215-225 intake and 220-230exhaust duration@050. Small lift(save your valvetrain)
Delta Cam can grind you a custom grind for the same money OR LESS than Compcam...and give good input
6sally6
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Old 04-17-2012, 10:17 PM
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Summit racing offers a cam that has .216 duration @.050. It works with low compression 350's and provides a lopey idle without the loss of low end torque. The rest of your combo matches it well so it'll work for you. After you get it installed you have to get the tune correct for it to lope. The 1102 that your removing would you be willing to sell it and the lifters? You would have to keep the lifters in the exact order they are on now but that's not very hard. If you want to do so, shoot me a PM.
http://www.summitracing.com/parts/SUM-1065/
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Old 04-17-2012, 11:54 PM
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Isky cam #201268. It will have the sound at idle you want and is very responsive. Degree it in for best results. 103 intake C/L.
You will want to recurve the distributor after installing this cam.
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Old 04-18-2012, 01:37 AM
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Have you made any changes to the Edelbrock 600? Sometimes you can soothe the idle by changing the metering rod springs,the assortment only runs about $10.
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Old 04-18-2012, 06:49 AM
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cam/carb

the carb is the same as it came out of the box.. yes its goin in the bucket, it wt's about 1800#. spoke to the tech rep and he said it between a smooth and rough idle cam... only took 2 hrs to get through... a few yrs ago, when i replaced with a ruff idle the tech said summit's are built by comp.. he did suggest the comp 270/270 but its very close to the summit K1104 and half the price.. I don't cheap out on my car but i don't blow money either just for the name..
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Old 04-18-2012, 08:56 AM
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Quote:
Originally Posted by delawarebill
the carb is the same as it came out of the box.. yes its goin in the bucket, it wt's about 1800#. spoke to the tech rep and he said it between a smooth and rough idle cam... only took 2 hrs to get through... a few yrs ago, when i replaced with a ruff idle the tech said summit's are built by comp.. he did suggest the comp 270/270 but its very close to the summit K1104 and half the price.. I don't cheap out on my car but i don't blow money either just for the name..
Summit cams are not made by comp, half of comp's cams are not made by comp. They're mass produced and reboxed by a lot of cam companies.

Elgin sells the same cam as all the rest but at a better deal, the 216/216 cam with a 106lsa and .450" lift. It's exactly what you need, its a lopey street cam that is very easy on the valvetrain. It makes pretty good torque too. Not a cam for big power numbers but is very nice in most street rods. I've ran this cam with 1.6 rockers and its wonderful for mild stockish engines. It really should have headers used with it though.

Comp sells that cam as the 274h06, I forgot the elgin part number but they're all the same. You may want to consider 1.6 rockers with it if you have decent heads as it'll pick up some power with this mild cam.
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Old 04-18-2012, 11:35 AM
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These guys(above) give good/right on advice.
I might add one thing.
If you get a cam(like suggested) try to get bigger exhaust duration than intake. It will give the engine more of a "thump" sound at idle because the exhaust is closing a little later. Good also if street rod with mufflers....gives a fraction more time for the exhaust pulse to go thru the restrictive muffler.
Listen to the "mutha-thumpa" grind by CompCam. Long exhaust duration and tight lobe separation.
Custom grind cams are same or less money than shelf item cams. Howards...Delta...Bullet...If you order....takes about the same length of time too.
6sally6
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Old 04-18-2012, 12:58 PM
How fast is fast enough?
 
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Quote:
Originally Posted by 6sally6
These guys(above) give good/right on advice.
I might add one thing.
If you get a cam(like suggested) try to get bigger exhaust duration than intake. It will give the engine more of a "thump" sound at idle because the exhaust is closing a little later. Good also if street rod with mufflers....gives a fraction more time for the exhaust pulse to go thru the restrictive muffler.
Listen to the "mutha-thumpa" grind by CompCam. Long exhaust duration and tight lobe separation.
Custom grind cams are same or less money than shelf item cams. Howards...Delta...Bullet...If you order....takes about the same length of time too.
6sally6
You won't find a custom cam cheaper than an elgin cam. They're like $75 including the lifters. A custom cam would be better but with a nearly stock engine it seems silly to me.
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Old 04-18-2012, 02:38 PM
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Might want to check this out:http://www.summitracing.com/parts/HRS-CL112431-06/ Sounds like it fit's the bill!
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Old 04-18-2012, 08:31 PM
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The Elgin 1785 is the same as the Crane 274HO6, .450, 274*, 218* @ .050, 106* LSA. Here's the Elgin cam/lifter kit for $99.99 at Northern Auto Parts

Here's this cam in a stock Goodwrench 350 with an Edelbrock Performer and a 600 Holley with headers:

Ed

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Old 04-19-2012, 02:12 AM
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Give this a listen http://www.youtube.com/watch?v=1pE_WeIInNs I used several of these "back in the day" 350HP 327 L-79 always loved them.
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Old 04-19-2012, 09:06 AM
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Quote:
Originally Posted by ap72
You won't find a custom cam cheaper than an elgin cam. They're like $75 including the lifters. A custom cam would be better but with a nearly stock engine it seems silly to me.
I stand corrected! Elgin cams have been around along time and spin in alot of engines.
My opinion may have been clouded by the guys @Delta Cams. Great after the sale service, recommendations on aplication, and a pretty good price.
Hard to beat $99.00 bucks though!!!
6sally6
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Old 04-19-2012, 01:30 PM
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Quote:
Originally Posted by JeffB
Might want to check this out:http://www.summitracing.com/parts/HRS-CL112431-06/ Sounds like it fit's the bill!
That Howard's cam is a great choice, but this Summit is virtually identical, and works great for a street car, even with a stock converter. It's lopey like you want, but still has decent bottom end, especially with a lightweight car like your's:
http://www.summitracing.com/parts/SUM-K00172/
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Old 04-19-2012, 03:03 PM
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Quote:
Originally Posted by 1971BB427
That Howard's cam is a great choice, but this Summit is virtually identical, and works great for a street car, even with a stock converter. It's lopey like you want, but still has decent bottom end, especially with a lightweight car like your's:
http://www.summitracing.com/parts/SUM-K00172/
This Summit cam is the same as the Crane 274HO6 (and the last I knew the Summit branded cams are supplied by Crane) and the Elgin 1785.

The Howards cam mentioned by JeffB is basically identical to the Isky 201268 mentioned by F'Bird88, just 1* @ .050 difference. Howards is a quality piece, but a little lower priced than the equivalent Isky.
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