Header questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70c10 · 01-13-2003, 02:10 PM

Anybody know what size primaries the Dynomax cerama coated headers have?. I was also looking at Cerama coated Flow Techs by Holley. These are 1 1/2" primaries. Will I notice any performance change going from Hooker Super Comps to either of these other brands/sizes?. Mine still work but the ceramic coating is all gone now that they are old.

70c10 · 01-13-2003, 02:15 PM

Just checked Summit's site and found out Dynomax are also 1 1/2" primaries. I'm pretty sure mine are 1 5/8".

crazy longhorn · 01-13-2003, 05:16 PM

The Hookers are good headers, but a little pricey. I have a set of Comps on the 69(1 5/8 tube,2 1/2 collector). the comps are 16 guage tubing, vs 18 guage on the super comps. I think the super comps can be had in a 1 5/8'or 1 3/4 " tube for the SB. I didnt opt for the coated headers, a little time with the sandblaster & some BBQ grill paint......& Im good for 2 seasons. I dont run more than 1500- 2000 mi per yr tho......& never wet(dont have any door glass to roll up!) For street bound, 350- 383 IMHO, 1 5/8 is big enough on the primarys........crazyL

70c10 · 01-13-2003, 05:33 PM

Crazy,
My question is will I notice a performance loss if I go back down to 1 1/2"?. Thanks

crazy longhorn · 01-13-2003, 05:39 PM

you might trade off a little upstairs, & gain a little more tork in the low range.....thats not all bad on a street driven truck tho....

70c10 · 01-14-2003, 08:50 AM

Thanks crazy longhorn!. I want the torque down low anyway. I think I'm going with the Comp XE262 cam.

cableguy0 · 01-14-2003, 09:38 AM

im runnin the dynomax ceramics and there was more torque down low as well as it seemed more upstairs too. the truck has seen well over 6 grand and didnt seem to wanna quit goin except for the cam runs outta power up near there.im running a lunati with .480 lift on both sides and a .230@.050 duration

01-13-2003, 02:10 PM	#1
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	Header questions Anybody know what size primaries the Dynomax cerama coated headers have?. I was also looking at Cerama coated Flow Techs by Holley. These are 1 1/2" primaries. Will I notice any performance change going from Hooker Super Comps to either of these other brands/sizes?. Mine still work but the ceramic coating is all gone now that they are old. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

01-13-2003, 02:15 PM	#2
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	Just checked Summit's site and found out Dynomax are also 1 1/2" primaries. I'm pretty sure mine are 1 5/8". __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads Last edited by 70c10; 01-13-2003 at 03:01 PM.

01-13-2003, 05:16 PM	#3
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	The Hookers are good headers, but a little pricey. I have a set of Comps on the 69(1 5/8 tube,2 1/2 collector). the comps are 16 guage tubing, vs 18 guage on the super comps. I think the super comps can be had in a 1 5/8'or 1 3/4 " tube for the SB. I didnt opt for the coated headers, a little time with the sandblaster & some BBQ grill paint......& Im good for 2 seasons. I dont run more than 1500- 2000 mi per yr tho......& never wet(dont have any door glass to roll up!) For street bound, 350- 383 IMHO, 1 5/8 is big enough on the primarys........crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

01-13-2003, 05:33 PM	#4
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	Crazy, My question is will I notice a performance loss if I go back down to 1 1/2"?. Thanks __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

01-13-2003, 05:39 PM	#5
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	you might trade off a little upstairs, & gain a little more tork in the low range.....thats not all bad on a street driven truck tho.... __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

01-14-2003, 08:50 AM	#6
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	Thanks crazy longhorn!. I want the torque down low anyway. I think I'm going with the Comp XE262 cam. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

01-14-2003, 09:38 AM	#7
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	im runnin the dynomax ceramics and there was more torque down low as well as it seemed more upstairs too. the truck has seen well over 6 grand and didnt seem to wanna quit goin except for the cam runs outta power up near there.im running a lunati with .480 lift on both sides and a .230@.050 duration __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.



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