How to tell if TTY bolts are tight enough? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

jbassking · 03-31-2018, 11:23 PM

I bought a torque angle gauge to use when torquing the head bolts on my L99. The problem is, the dial didn't always move even though the bolt was turning. Now I'm left with not knowing if the bolts are tight enough.

Has any "converted" the 22 lb ft, plus 90 degrees plus 70 degrees to ft lbs? I was hoping to use this as a double checker.

2010reddevil · 04-01-2018, 01:16 AM

That's the number one reason to use ARP bolts vs the crap tty OEM bolts. I have no experience trying to convert because the whole point of a tty design depends on a certain amount of stretch and strain put on the bolt. Once it has been achieved, it is no longer able to be stretched again and must be thrown away.

Clarkstar · 04-01-2018, 07:26 AM

Earl's sells head bolts that are cheaper than arp but still really nice. Way better than tty...

Clarkstar · 04-01-2018, 07:29 AM

These...

Rock-It Man · 04-01-2018, 08:00 AM

The whole point of TTY bolts is to insure clamping force over a range of friction conditions.

You tighten to the prescribed torque, then go 1/4 turn regardless of torque reading. While the bolt is yielding, your torque reading is not going to change much.

So there's no "conversion".

Stormcloak · 04-01-2018, 02:24 PM

x lb/ft + 90 degrees = torque down to the initial number, then get a marker, and make 2 marks, one on the bolt, and one on its mating surface 1/4 turn away. Tighten until they line up.

danielpaul · 04-02-2018, 12:19 AM

bought a torque angle gauge to use when torquing the head bolts on my L99. The problem is, the dial didn't always move even though the bolt was turning. Now I'm left with not knowing if the bolts are tight enough.

Badbubba · 04-02-2018, 01:42 AM

Pic of angle gauge? Usually has an arm that extends to "lock" it down. Then set the gauge to zero. Was the arm secure?

03-31-2018, 11:23 PM	#1
jbassking Drives: 2012 SS Join Date: Aug 2017 Location: Lake Worth, FL Posts: 99	How to tell if TTY bolts are tight enough? I bought a torque angle gauge to use when torquing the head bolts on my L99. The problem is, the dial didn't always move even though the bolt was turning. Now I'm left with not knowing if the bolts are tight enough. Has any "converted" the 22 lb ft, plus 90 degrees plus 70 degrees to ft lbs? I was hoping to use this as a double checker.

04-01-2018, 01:16 AM	#2
2010reddevil Drives: 2010 Camaro 2SS Victory Red 6M Join Date: Apr 2015 Location: Gulf Coast, TX Posts: 1,424	That's the number one reason to use ARP bolts vs the crap tty OEM bolts. I have no experience trying to convert because the whole point of a tty design depends on a certain amount of stretch and strain put on the bolt. Once it has been achieved, it is no longer able to be stretched again and must be thrown away. __________________ 2011 2SS 6A Red Jewel Metallic, Vararam Tune CAI, Magnaflow 3" Competition c/b, Speed Engineering 1-7/8 LT's, Circle D 5C, M/T 275/40R20 S/S, HPTuners tune by Ryan@GPI 12.3 @ 112 ACM as of 12/22/19 Gone on 12/28/19 R I P 2010 2SS 6M Victory Red/Black (old ride) CAI intake, Speed Engineering 1 7/8" LT's, X4 base tune, Flowmaster Outlaw axle-back. 12.6 @ 115 SAR as of 9/19/15 Gone but never forgotten.

04-01-2018, 07:26 AM	#3
Clarkstar Drives: 2013 1SS 1LE Join Date: Jun 2016 Location: Ixonia wi Posts: 1,456	Earl's sells head bolts that are cheaper than arp but still really nice. Way better than tty... __________________ 2013 1le- Katech 416 short block, TSP custom grind cam, LOD intake, cnc heads by F.ED., Nick William's 102mm T.B., CORN fed, Pedders coilovers. Performance street alingnment by Justin at Lake Country Alignment and dyno tune by Late Model Throttle. 603 h.p. 495 ft lbs tq.

04-01-2018, 07:29 AM	#4
Clarkstar Drives: 2013 1SS 1LE Join Date: Jun 2016 Location: Ixonia wi Posts: 1,456	These... Attached Images __________________ 2013 1le- Katech 416 short block, TSP custom grind cam, LOD intake, cnc heads by F.ED., Nick William's 102mm T.B., CORN fed, Pedders coilovers. Performance street alingnment by Justin at Lake Country Alignment and dyno tune by Late Model Throttle. 603 h.p. 495 ft lbs tq.

04-01-2018, 02:24 PM	#6
Stormcloak slower than you Drives: 2012 C6 Z06 Join Date: Oct 2015 Location: NY Posts: 668 View My Garage	x lb/ft + 90 degrees = torque down to the initial number, then get a marker, and make 2 marks, one on the bolt, and one on its mating surface 1/4 turn away. Tighten until they line up. __________________

04-01-2018, 08:00 AM	#5
Rock-It Man 376 cubic inches of fun Drives: 2023 Camaro ZL1 A10 Join Date: Jul 2010 Location: MA Posts: 4,033 View My Garage	The whole point of TTY bolts is to insure clamping force over a range of friction conditions. You tighten to the prescribed torque, then go 1/4 turn regardless of torque reading. While the bolt is yielding, your torque reading is not going to change much. So there's no "conversion".

04-02-2018, 12:19 AM	#7
danielpaul Drives: if you want to archive a file named Join Date: Apr 2018 Location: usa Posts: 1	bought a torque angle gauge to use when torquing the head bolts on my L99. The problem is, the dial didn't always move even though the bolt was turning. Now I'm left with not knowing if the bolts are tight enough. __________________ Now Cric booth Just Starting PSL Live Streaming free and Update about All Matches

04-02-2018, 01:42 AM	#8
Badbubba GrINned & JUICEd Drives: 15STI, 10Expy, 10 2SS/RS M6, 47KB1 Join Date: Nov 2009 Location: Pittsburgh, PA Posts: 1,247	Pic of angle gauge? Usually has an arm that extends to "lock" it down. Then set the gauge to zero. Was the arm secure? __________________ GPI SS3 Cam & stuff,N.O. Plate(dedicated fuel tank,progressive,fuel hose upgrade,remote opener,heater,console switches),LNC2000,CTAP,ARH 1 7/8" LTs/gutted cats/X pipe/mufflers,Jet Hot coated LTs,GPI HPT Tune,CAI, Scoop,Rx Catch Can,Gates heater hose relocation, Remote clutch & auto brake res,Metco loop,Momentum Tunnel Brace,TSW Nurb 18",555 & 05,Pfadt trailing arms & toe rods,Autometer WB,Fesler Pillar Pod,LED strips (int),Lloyds floor & trunk mats,LED DRL/front turn & license plate,DRL harness,VLEDs tail lights,Plasticoat Bowties. Ord: Oct 5, 2009 Rec: Nov 19, 2009 13.17@112.6 stock