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Author
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Topic: afr head ?
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93LX342
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Member # 1793
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posted
 
 
i have had 3 different motors with afr heads and stud mount rockers.all 3 motors have had noisy rockers.pushrods seem to be the right length.all have had scorpion rockers.do any of you have noisy rockers on your afr headed motors?
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06 f250 superduty with some mods.
95 f250
www.unlimitedracing.com
Posts: 1036 | From: san jose | Registered: Sep 2002
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mustanggt5091
All I need is.....
Member # 444
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posted
I have Crane Golds on my 185's, i wouldnt call them noisy
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88 GT 357w (SOLD):(
06 Limited Edition R6 !!!!!
Posts: 2353 | From: Fairfield / Santa Rosa , Ca | Registered: Sep 2001
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93LX342
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Member # 1793
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posted
they are quiet cold but noisy hot.got the motor to temp readjusted and they are quieter.
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06 f250 superduty with some mods.
95 f250
www.unlimitedracing.com
Posts: 1036 | From: san jose | Registered: Sep 2002
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AJBlackGT
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Member # 3936
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posted
Have you ever thought that maybe its the scorpion rocker? Usually the head wont make a difference in whethere or not the rocker is noisy. Try some comp pro mags.
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90 Notch
Posts: 1896 | From: Sacramento | Registered: Dec 2003
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AaronC
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Member # 86
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posted
I had scorpion rockers and comp pro magnums. They were both loud. The more aggressive the cams ramp rates the more sewing machine noise you will hear. Mine sounded like a sewing machine, lol
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1991 GT Convertible: Stock 157k mile shortblock, HiTech cam, AFR 165 heads, Edelbrock RPM intake, 1 3/4 headers
12.23 at 112.99
Best MPH 113.97
Posts: 776 | From: woodland | Registered: Dec 2000
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Jeff S
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Member # 371
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posted
You're fine Nate. Hurry and eat your dinner and pump some 100 in the BEAST!!! ![[burnout]](graemlins/burnout.gif)
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'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
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93PONY
Mr. Valve Events
Member # 60
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posted
Aluminum heads & longtube headers echo the noise. & XE camshaft profiles also make more noise.
I run 1.72 Scorpions on my Iron heads with an XE profile & they are quite loud. I can hear the valvetrain over my exhaust while driving.
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www.advancedenginedevelopment.com
SCT dealer
Dynotuning
(916)715-7569
Posts: 4265 | From: Fair Oaks, CA | Registered: Nov 2000
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93LX342
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Member # 1793
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posted
thats how mine is.jeff had me trippin on it.
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06 f250 superduty with some mods.
95 f250
www.unlimitedracing.com
Posts: 1036 | From: san jose | Registered: Sep 2002
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Stangs R Us
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Member # 4495
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posted
hey what spark plugs are you guys runnin in the 165's ?
Posts: 3100 | From: sacramento | Registered: Aug 2005
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AaronC
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Member # 86
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posted
plugs are autolite 3923's I believe
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1991 GT Convertible: Stock 157k mile shortblock, HiTech cam, AFR 165 heads, Edelbrock RPM intake, 1 3/4 headers
12.23 at 112.99
Best MPH 113.97
Posts: 776 | From: woodland | Registered: Dec 2000
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Jeff S
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Member # 371
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posted
quote:
Originally posted by red GT black rallyes:
hey what spark plugs are you guys runnin in the 165's ?
3924's for NA with 10:1 compression or less. 3923's for Nitrous/Superchager/Turbo or NA with higher than 10:1 compression.
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'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
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onesicklx
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Member # 285
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posted
quote:
Originally posted by Jeff S:
quote:
Originally posted by red GT black rallyes:
hey what spark plugs are you guys runnin in the 165's ?
3924's for NA with 10:1 compression or less. 3923's for Nitrous/Superchager/Turbo or NA with higher than 10:1 compression.
what about low compression...nitrous/supercharger/turbo...what plugs are you soppouse to use..
Posts: 1955 | From: san jose, CA | Registered: Jun 2001
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mtbaughs
Road Racer
Member # 4052
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posted
My opinion is that Scorpion rockers suck. A lot of the extra noise is from the sloppy trunions in them. Their along the lines of a pro form rocker or other low dollar option. Even when set to the proper preload they still make a racket at times. I've come to use certain brands rather than others so I don't run into that problem. Also I've gathered the impression that a lot of people stuff in pushrods that are known to be the right size based on what others have run. While many get away with proven sizes you will never beat getting yourself an adjustable pushrod and measuring them out yourself. This way you can set up the valve train to a more precise geometry.
Posts: 2019 | From: Boise, Idaho | Registered: Jan 2004
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AJBlackGT
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Member # 3936
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posted
He means yo run the 3923 with a blower. I think he only means n/a higher than 10:1
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90 Notch
Posts: 1896 | From: Sacramento | Registered: Dec 2003
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Jeff S
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Member # 371
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posted
quote:
Originally posted by AJBlackGT:
He means yo run the 3923 with a blower. I think he only means n/a higher than 10:1
Yes, that is exactly what I meant. ![[Smile]](smile.gif)
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'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
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BlackDrop50
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Member # 1715
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posted
Comp Pro Mags are noisy, but my exhaust is not ...too loud
Posts: 1379 | From: 510 East Bay | Registered: Aug 2002
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2stangs69-91
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Member # 1951
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posted
HMM I run a XE 274 with pedistal mounts and they are not noisey at all. FMS 1.6. roller rockers. I have heard AFR cars with roller rockers(actualy have never heard a AFR car with out them LOL.)and some are very noisey. I personaly have never adjusted the valves on any of the AFR motors I have heard.
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69 Mustang on hold
1991 LX hatch getting a make over
1994 F150 4X4 351
2006 Yamaha V-max 1200 Modded
Posts: 3711 | From: Redding | Registered: Oct 2002
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88DroptopGT
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Member # 2535
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posted
quote:
Originally posted by mtbaughs:
My opinion is that Scorpion rockers suck. A lot of the extra noise is from the sloppy trunions in them. Their along the lines of a pro form rocker or other low dollar option. Even when set to the proper preload they still make a racket at times. I've come to use certain brands rather than others so I don't run into that problem. Also I've gathered the impression that a lot of people stuff in pushrods that are known to be the right size based on what others have run. While many get away with proven sizes you will never beat getting yourself an adjustable pushrod and measuring them out yourself. This way you can set up the valve train to a more precise geometry.
Great info. What RR's would you suggest running then? Crane? FMS?
Posts: 3978 | From: 707 | Registered: Mar 2003
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mtbaughs
Road Racer
Member # 4052
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posted
I've never had a set of FMS rockers, or crane pro mag's make any noise for me. For that reason I tend to stick with them. I think when it boils down to it how you set up the valve train when you install it is one of the major factors.
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R.I.P. Charlie Bruno Dec 2001
Posts: 2019 | From: Boise, Idaho | Registered: Jan 2004
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