Double Hump Heads 327
01-18-2008, 01:38 PM
#2
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307 or 327?
Your heading said 327. If that's the case, no, not all 327's came with double humps. Some came with the same "power pack" heads on 283's, w/ 1.72" int. Worse yet, some came with 1.72" int with the large chambers that were common on the 70's "smog" 350's and 400's. But a good bit of them did get the double humps.
01-18-2008, 02:55 PM
#3
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Your heading said 327. If that's the case, no, not all 327's came with double humps. Some came with the same "power pack" heads on 283's, w/ 1.72" int. Worse yet, some came with 1.72" int with the large chambers that were common on the 70's "smog" 350's and 400's. But a good bit of them did get the double humps.
02-21-2008, 03:47 PM
#4
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why do you want to know. if it is for a resto double humps are ok but for performance they suck... that will **** some old timers off. but not all 327s came with double humps. double humps also came with a variety of cumbustion chamber sizes and valve sizes. very few came with 2.02 valves so be careful
02-23-2008, 09:46 AM
#5
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why do you want to know. if it is for a resto double humps are ok but for performance they suck... that will **** some old timers off. but not all 327s came with double humps. double humps also came with a variety of cumbustion chamber sizes and valve sizes. very few came with 2.02 valves so be careful
02-23-2008, 12:24 PM
#7
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make sure not to get crazy with inake port size.200 cc is pretty large for a 327.that would be for an all out racing ,high rpm motor, but i bet you have a forged crank in that 327, so go ahead and spin it to the moon!i was just reminding you to be conservitive on cam selection and port size because the slightly lower displacement of the 327 will make these things ''act'' bigger.
02-23-2008, 02:07 PM
#8
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The motor is bored .030 over and I'm getting the performer intake and carb combo from summit. 650 carb with the air gap intake. The cam I'm undecided. Any suggestions??
02-23-2008, 02:13 PM
#9
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make sure not to get crazy with inake port size.200 cc is pretty large for a 327.that would be for an all out racing ,high rpm motor, but i bet you have a forged crank in that 327, so go ahead and spin it to the moon!i was just reminding you to be conservitive on cam selection and port size because the slightly lower displacement of the 327 will make these things ''act'' bigger.
These are the heads SBC CHEVY Dart Iron Eagle Platinum Heads
200cc / 64cc / 2.02/1.60 valve / straight plug. Thanks
02-24-2008, 08:28 PM
#10
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what is this going in. car,weight,trans, rear gears,compression(true flat tops or 2 or 4 valve reliefs) i like the 200cc heads because when you do go faster the heads are the most expensive part. what he is talking about is with the larger heads your port velocity will be lower and kill the low end torque with the small cubic inches. it will rev to the moon but be lazy on the bottom end. matching your combo to the car can make this fun to drive...
what is the goal of the car? street or strip or fast street? this could be fun
the carn selection depends on the carb. some of the kits come with the holley 1850 series and they suck for performance.
what is the goal of the car? street or strip or fast street? this could be fun
the carn selection depends on the carb. some of the kits come with the holley 1850 series and they suck for performance.
02-25-2008, 07:16 AM
#11
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what is this going in. car,weight,trans, rear gears,compression(true flat tops or 2 or 4 valve reliefs) i like the 200cc heads because when you do go faster the heads are the most expensive part. what he is talking about is with the larger heads your port velocity will be lower and kill the low end torque with the small cubic inches. it will rev to the moon but be lazy on the bottom end. matching your combo to the car can make this fun to drive...
what is the goal of the car? street or strip or fast street? this could be fun
the carn selection depends on the carb. some of the kits come with the holley 1850 series and they suck for performance.
what is the goal of the car? street or strip or fast street? this could be fun
the carn selection depends on the carb. some of the kits come with the holley 1850 series and they suck for performance.
02-25-2008, 09:02 PM
#12
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as far as the cam goes the comp xtreme cl12-246-3 it will be very streetable but give a real nice kick. i would also get a 2000-2300 stall converter. it will be easy on the street. go much bigger on the cam and it might be slightly lazy on the bottom end with the larger heads. i would go with 3.73 gears. it will keep the rpms down to around 250 rpm cruising at 60-65 and not overrev the engine on the top end of the track. check the heads i think the springs are a little strong for that cam. if you going with the edelbrock carb you could go with a 750 and not hurt drivability. get a tuning kit it may be a little rich at cruise speeds.
this would be a decent street setup that even your mom could drive. if you wanted a hot street i would go with a 2800 stall and a cl12-254-3 kit. gas mileage and manners may be a little rougher. then you could use the 4.11 gears because you should be at 6500-6800 rpms
go with the performer rpm ari gap not the standard performer air gap. big diff
this would be a decent street setup that even your mom could drive. if you wanted a hot street i would go with a 2800 stall and a cl12-254-3 kit. gas mileage and manners may be a little rougher. then you could use the 4.11 gears because you should be at 6500-6800 rpms
go with the performer rpm ari gap not the standard performer air gap. big diff
Last edited by byrons1502; 02-25-2008 at 09:08 PM. Reason: clarifying intakes
02-25-2008, 11:30 PM
#13
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as far as the cam goes the comp xtreme cl12-246-3 it will be very streetable but give a real nice kick. i would also get a 2000-2300 stall converter. it will be easy on the street. go much bigger on the cam and it might be slightly lazy on the bottom end with the larger heads. i would go with 3.73 gears. it will keep the rpms down to around 250 rpm cruising at 60-65 and not overrev the engine on the top end of the track. check the heads i think the springs are a little strong for that cam. if you going with the edelbrock carb you could go with a 750 and not hurt drivability. get a tuning kit it may be a little rich at cruise speeds.
this would be a decent street setup that even your mom could drive. if you wanted a hot street i would go with a 2800 stall and a cl12-254-3 kit. gas mileage and manners may be a little rougher. then you could use the 4.11 gears because you should be at 6500-6800 rpms
go with the performer rpm ari gap not the standard performer air gap. big diff
this would be a decent street setup that even your mom could drive. if you wanted a hot street i would go with a 2800 stall and a cl12-254-3 kit. gas mileage and manners may be a little rougher. then you could use the 4.11 gears because you should be at 6500-6800 rpms
go with the performer rpm ari gap not the standard performer air gap. big diff
02-26-2008, 07:24 PM
#14
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the good part about the thunder series is they have a lot of adjustments. the edelbrock carbs you can go big and still have the same driveability. i would recommend a tuning kit though it will be a little rich. most quadrajets are 750-800 cfm. the edelbrock is not the best for all out performance but i have ran a 750 edelbrock on a 11 second z. they are one of the easiest bolt and go carbs. that will be a great combo
02-27-2008, 12:54 AM
#15
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as far as the cam goes the comp xtreme cl12-246-3 it will be very streetable but give a real nice kick. i would also get a 2000-2300 stall converter. it will be easy on the street. go much bigger on the cam and it might be slightly lazy on the bottom end with the larger heads. i would go with 3.73 gears. it will keep the rpms down to around 250 rpm cruising at 60-65 and not overrev the engine on the top end of the track. check the heads i think the springs are a little strong for that cam. if you going with the edelbrock carb you could go with a 750 and not hurt drivability. get a tuning kit it may be a little rich at cruise speeds.
this would be a decent street setup that even your mom could drive. if you wanted a hot street i would go with a 2800 stall and a cl12-254-3 kit. gas mileage and manners may be a little rougher. then you could use the 4.11 gears because you should be at 6500-6800 rpms
go with the performer rpm ari gap not the standard performer air gap. big diff
this would be a decent street setup that even your mom could drive. if you wanted a hot street i would go with a 2800 stall and a cl12-254-3 kit. gas mileage and manners may be a little rougher. then you could use the 4.11 gears because you should be at 6500-6800 rpms
go with the performer rpm ari gap not the standard performer air gap. big diff
