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  #16  
Old Dec 10th, 05, 9:44 AM
hotrod71chevelle hotrod71chevelle is offline
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Bryan
 
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Default Re: 186 casting double hump heads

keep in mind that this is a street car. i will be driving only on sunny days. i'll make a run down the strip a couple of times during the summer, but other than that it's sunny weekends only. i had a set of 462 double humps in my 55 chevy and was very happy. i got these heads because they were cheap, and for personal preference.
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  #17  
Old Dec 10th, 05, 12:40 PM
pdq67 pdq67 is offline
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Thumbs up Re: 186 casting double hump heads

Please consider the CHEAP, 195 cc intake port ALUMINUM AND CAST-IRON heads Hotrodsusa are selling that somebody said at 10 percent off now for just a bit longer!!

For about $400 (C-I) and $500 (AL) a pair. BARE!!

I know they are NOT as good as AFR's and Brodix, but still, for this kinda money should be a great value for a street motor head!!

pdq67
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  #18  
Old Dec 10th, 05, 1:20 PM
chevfan_1 chevfan_1 is offline
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Tom
 
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Default Re: 186 casting double hump heads

My friend ran low 12's on a set of 1.94/1.6 461 camel humps that were set up for a 540 lift solid cam.It had a th-350 with a 3k stall and a tunnel ram with 2 450 holleys. And a 12 bolt with 3.73 gears.By the way this was in a street driven 65 impala. All stock interior.I give the thumbs up for the camel humps. The only iron factory head I will run besides the 041's after being ported.If you want real power step up to dart or AFR.
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  #19  
Old Dec 10th, 05, 5:11 PM
RB69SS396Conv RB69SS396Conv is offline
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Default Re: 186 casting double hump heads

041s ARE double-humps. Some of the casting numbers you see the most are 461 (no bolt holes), 462, 492, 186, 041, 041X, 291 (no bolt holes), 292 (over-the-counter GM race head)

Those used to be the heads we all ran, for years and years, back before CNC casting made possible the whole aftermarket head industry as we know it. Before World or Dart or AFR or Edelbrock or Trick Flow or Pro Topline. Back before there was any such thing as a "street" "aftermarket" head. Or one for any purpose but the most hard-core racing, for that matter.

As has been said, good heads, for their day; among the best. Good for low-mid 400s HP on modern pump gas, given the CR you have to run these days; which will take a typical steel car to mid 12s if the car is set up well. Among the best stock heads of all time until Vortecs. But certainly not "competitive" in a heads-up sense any longer, except for a fun cheep street machine. And they're still great for that.
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  #20  
Old Dec 11th, 05, 1:51 AM
asbill71 asbill71 is offline
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Default Re: 186 casting double hump heads

I run a set of 186's on my 30 over 350 with cheapo flat tops. I have a 480 lift Lunati hyd cam and I have no problem running even unleaded. I usually run the middle grade with absolutly no knocking. I agree that the newer aftermarket heads are better, but that said, I to paid $100 for my heads and spent $130 on clean up and 3 angle job. No Porting. I have this motor in my 67 Elky and run constistant 8.30's in1/8th mile in good air (figure about a 13 flat in 1/4). I can drive it around town all day. I am in the process of starting another motor build, but I built this entire small block, for less money that a set of SB Trick Flow heads cost. Thats even paying $150 for a good core. I got the cheapo $50 machine shop crank and the $10 each flat top pistons.

The way I see it the more Money you got the faster your car can go, which means Donald Trump if he chose to, could have one of the fastest cars in the world. But I like the idea of taking older less expensive stuff and see how fast i can go.

I have outran several cars with lots more monet tied up in the motors, that just makes my day.
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  #21  
Old Dec 11th, 05, 11:24 AM
JSB JSB is offline
 
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Default Re: 186 casting double hump heads

I have a set of 461's, ported and polished flowing @210, running mid 11's.
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  #22  
Old Dec 11th, 05, 6:42 PM
hotrod71chevelle hotrod71chevelle is offline
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Default Re: 186 casting double hump heads

just got back from the machine shop. the heads have already been cut for 2.02's and the porting is done on one head. they will be done by the end of the week so i can put them on next weekend if my new head bolt kit from summit gets here. they were magnafluxed and had no cracks. had to run the head through the shaver once to true them up. can't wait to try them out.
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  #23  
Old Dec 11th, 05, 8:54 PM
wayne442 wayne442 is offline
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Default Re: 186 casting double hump heads

Wow you guys are getting a lot of hps out of the old double humps i did a motor 350 40 over flat tops 63cc heads port matched rpm intake rpm cam roller rockers hooker super comps headers 38 total advance timming 750dp motors in a 78 G car 3spd auto 3.73 posi the best i can get is 305hp at the rear wheels? What gives?
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  #24  
Old Dec 11th, 05, 9:42 PM
RB69SS396Conv RB69SS396Conv is offline
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Default Re: 186 casting double hump heads

Quote:
rpm cam
There's your answer.

Your torque converter might also be an issue... a stock 350 converter with that cam will make for a pretty soggy leave.
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  #25  
Old Dec 11th, 05, 10:07 PM
wayne442 wayne442 is offline
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Default Re: 186 casting double hump heads

3500 stall the dyno was a rear wheel
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  #26  
Old Dec 12th, 05, 4:03 PM
mike nelson mike nelson is offline
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Default Re: 186 casting double hump heads

to hotrod71chevelle what happened to the "i have a 500+ smallblock" from a previous post. looks like the bs meter is pegged. i have a big block with gm heads and there is no way 186 heads come close. i know cause sitting next to my 70 chevelle is a 70 lt1 stingray with port to the max 186 heads on it. may we sould go on pinks. i can come to kansas for a title race.
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  #27  
Old Dec 12th, 05, 7:48 PM
hotrod71chevelle hotrod71chevelle is offline
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Default Re: 186 casting double hump heads

whenever you're ready, i can get the track. i've beaten the so called "fastest car in the area". if the 71 won't beat you, i'll unload my 68 camaro. it has a reher morrison big block. it "IS" street legal and runs in the 9's. i'll be back from school in late march, so come on down and bring your title. my 500+ horsepower post, was what the guy that built my motor told me it would do with a few option parts which i've purchased. when i get the heads and other parts on, i'm going to take it to the dyno and see what is getting to the rear wheels. hope to see you in spring.
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  #28  
Old Dec 12th, 05, 10:12 PM
sschevellefan sschevellefan is offline
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Default Re: 186 casting double hump heads

I`m not trying to start anything but you won`t make 500hp with 186 heads. At least not without a blower or NOS. What are the specs of your motor? If you do have a 9 second Camaro, why waste your time with a tiny smallblock with "fuelie" heads? It just seems strange to me that your asking us if 186 heads are any good, like someone who is new to performance stuff, and then you start arguing with Mike and throw out a name like Reher Morrison. I`m not trying to talk **** because I don`t care what parts you run or how fast your car is. It`s just a observation.
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  #29  
Old Dec 12th, 05, 10:48 PM
chevfan_1 chevfan_1 is offline
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Tom
 
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Default Re: 186 casting double hump heads

I have personally seen a solid cammed 355 with 461 heads pull 515 HP on a dyno at a local high perf. machine shop. It can be done.
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  #30  
Old Dec 13th, 05, 12:03 PM
sschevellefan sschevellefan is offline
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Default Re: 186 casting double hump heads

Quote:
Originally Posted by chevfan_1
I have personally seen a solid cammed 355 with 461 heads pull 515 HP on a dyno at a local high perf. machine shop. It can be done.
It`s not going to be streetable if your not using a blower or NOS. It would take alot of compression and alot of camshaft to make that much power with a small head like the 186 head. I use to work for a machine shop that built drag race and sprint motors and dynoed them and they never had one with "fuelie" heads that made anything close to that power that would be a pump gas streetable motor. Anytime they wanted 500hp from a 350 they used AFR or Brodix heads.
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