180, 200+cc heads???
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180, 200+cc heads???
I hear many different opinions on this and trying to see what makes the most sense with respect to cost and power. What makes the best power for a dirt track engine, cast iron heads only with 23 degree angle.
180cc runner or larger, valve size, etc?
7000 rpm max 3/8" dirt oval
3000 lbs car with 8.5-9" tread
10.0:1 compression/360 max cid
830 cfm carb Holley 4 bbl
2716 edelbrock intake with 1" open spacer. 2701 can also be used if not vortec related
stock block small block chevy
std weight forged crank, 3.50 stroke
380-400 gm piston weight
low tension metric rings
Jones race cam
180cc runner or larger, valve size, etc?
7000 rpm max 3/8" dirt oval
3000 lbs car with 8.5-9" tread
10.0:1 compression/360 max cid
830 cfm carb Holley 4 bbl
2716 edelbrock intake with 1" open spacer. 2701 can also be used if not vortec related
stock block small block chevy
std weight forged crank, 3.50 stroke
380-400 gm piston weight
low tension metric rings
Jones race cam
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Re: 180, 200+cc heads???
Yes, 7000 is the rev limit per rule.
244-248 @.050, .352/.359 cam lift, 1.6 on intake. 108 LSA
244-248 @.050, .352/.359 cam lift, 1.6 on intake. 108 LSA
Re: 180, 200+cc heads???
If it has to be as cast the heads are usually smaller than the advertised #, for instance the RHS head pours around 195cc.
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THE ABOVE POST IN NO WAY REFLECTS THE VIEWS OF SPEED TALK OR IT'S MEMBERS AND SHOULD BE VIEWED AS ENTERTAINMENT ONLY...Thanks, The Management!
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Re: 180, 200+cc heads???
The 830 carb is way to big.
I'd go bigger on the cam as well. 244/248 is good for a 2bbl but small for a 4bbl. 250/250 would be my choice.
I'd do a 180 runner. Anything bigger can be lazy on the bottom end. You'll want bottom end on a 3k lbs car.
I'd go bigger on the cam as well. 244/248 is good for a 2bbl but small for a 4bbl. 250/250 would be my choice.
I'd do a 180 runner. Anything bigger can be lazy on the bottom end. You'll want bottom end on a 3k lbs car.
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Re: 180, 200+cc heads???
Then I would start with the 180 and a good head porter to utilize the best port for the rpm band you will be operating in.
Please Note!
THE ABOVE POST IN NO WAY REFLECTS THE VIEWS OF SPEED TALK OR IT'S MEMBERS AND SHOULD BE VIEWED AS ENTERTAINMENT ONLY...Thanks, The Management!
THE ABOVE POST IN NO WAY REFLECTS THE VIEWS OF SPEED TALK OR IT'S MEMBERS AND SHOULD BE VIEWED AS ENTERTAINMENT ONLY...Thanks, The Management!
Re: 180, 200+cc heads???
id go back in time with the heads. a well ported set of sportsman II's, and add another 10degr to both sides of the cam.
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Re: 180, 200+cc heads???
I am guessing 355 ci? Ported 180cc heads will deliver if done right they will finish about 205cc.
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Re: 180, 200+cc heads???
If you are running a 4.03" bore I would not go larger than 2.055" intake.
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Re: 180, 200+cc heads???
Im my experience the 180 head would be perfect. We build a spec 360 10.5 to 1 engine on gas with a 4bbl and make about 450hp 460tq. We turn 7400 rpm in a 3000lb stockcar. We use a spec eq head thats only around a 170cc runner. I have tried a 200 runner head and they are very lazy on the bottom end and come on like a bottle rocket about 1/2 way down the straightaway.
I agree the 830cfm carb is WAY to big.
I agree the 830cfm carb is WAY to big.