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Old 12-27-2012, 04:27 PM   #1
phoenixZRO
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Default Hardened pushrods

Are they necessary for DOD delete/cam swap? And if so what size? I see 7.4" and 7.425" on sigs. Thanks!
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Old 12-28-2012, 11:32 AM   #2
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7.400 if milling the heads. No milling, 7.425. Procharger setup is going to be 7.425".
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Old 12-28-2012, 12:43 PM   #3
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****, would 7.400 be to short for stock heads ? i said 7.400 when i ordered my DOD delete kit today with a 229/236 cam, i'm not doing anything to my heads, and thought 7.400 were ideal, i'd be doing the rocker trunions as well, so should i change to 7.425's, or the 7.400's would be fine ?
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Old 12-28-2012, 01:49 PM   #4
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^ That's a good question. Also Rick, if I'm not Procharging for a year or so would it be best just to go with 7.4 for now since your milling and porting LS3 heads for me then switch to 7.425 when it's time?
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Old 12-28-2012, 03:39 PM   #5
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Interesting, I thought they had to be measured for your setup. I had mine custom measured from the machine shop. I'll have to ask the length.
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Old 12-28-2012, 04:00 PM   #6
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I had 7.425s with my cam swap and no milling. 226/236. ^ It is best to check.
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Old 12-28-2012, 05:18 PM   #7
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Quote:
Originally Posted by bluegoat06 View Post
****, would 7.400 be to short for stock heads ? i said 7.400 when i ordered my DOD delete kit today with a 229/236 cam, i'm not doing anything to my heads, and thought 7.400 were ideal, i'd be doing the rocker trunions as well, so should i change to 7.425's, or the 7.400's would be fine ?
7.400 is going to be too short. You can't mill the heads with that cam unless you run valve reliefs.

Pheonix, at the most they will just get a clean-up cut for a good sealing surface. You need the compression to stay where it is. If you are going boost, it isn't worth it. If you really want to bump it, get thinner Cometic gaskets. .040-.032" for a compression bump. That way you can go back to .051" with boost. Plus thinner head gaskets give a tighter quench for better knock resistance with pump gas.
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2.00 60ft 13.06 @ 106.6 1.85 SLP Rocker HPTuner
1.97 60ft, 12.87 @107.7 3.45's and Custom exhaust w/manifolds
1.94 60ft, 12.57 @111.9 217/225 Lunati Cam
2.03 60ft, 12.37 @115.3 Doug Thorley headers
1.94 60ft, 12.20 @ 115.0 Comp 219/233 Thumpr Cam
1.72 60ft, 11.65 @ 118.6 221/233 DoD Cam 2600 stall, street tires, Crawford ported heads and Intake
1.53 60ft, 10.59@ 129.7 ALL MOTOR!!! N/A G8 Record Holder
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Old 12-28-2012, 06:31 PM   #8
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Thanks a lot guys, i sent an email to Texas Speed.
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Old 12-28-2012, 07:11 PM   #9
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Found this pic online, along with a description that says that if LS7 lifters are used, the pushrod has to be 0.50 shorter ? I ordered 16 Ls7 lifters, and that's why i thought 7.40 was ideal, don't know if the stock lifters are the same lenght or shape as the LS7's.

LS7 lifter on the left, LS1 lifter on the right.
http://i143.photobucket.com/albums/r...2/DSCF4015.jpg
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2009 G8GT , Gone But Not Forgotten
Comp 223/230 .610/.608 112+0 | PRC .650" Dual Springs | Comp Trunion Upgrade | Rotofab CAI | LS7 MAF |102 mm MAF Housing |Blox VS |1 3/4 Pacesetter LT's | 2.5" Header Back Custom Exhaust | Yank SS 3200 stall | Deep Sump 6L80e Pan Kit | B&M 70273 Trans Cooler |HPTuners Pro v2.24 | Street Tuned | 7.80@91.05mph 1.79 60'

Last edited by bluegoat06; 12-28-2012 at 07:27 PM.
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Old 12-29-2012, 09:39 PM   #10
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X2. I'm going to be ordering my dod delete soon and will have ls7 lifters makes e also wonder what length pushrods will be neeced
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Old 12-29-2012, 09:45 PM   #11
phoenixZRO
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7.425" but depending on cam from what I gather
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Completed: Livernois 91 octane tune, carbon fiber Rotofab CAI, SLP headers and catback, Flowmaster exhaust, AC Delco MAF, BFG g-Force Sport Comp 2 tires on black Camaro 19s, partial chrome delete, complete badge delete, RF 1000.1bd amp w/ 2 RF P3D4 subs
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Old 12-29-2012, 09:46 PM   #12
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Yea I had to rethink my hole build because of the cam I got. I got the tsp 231/236 cam. And I dont wanna fly cut.
So im doing a 402 stroker build with ported heads and ricks ported manifold
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Old 01-03-2013, 11:17 AM   #13
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I just emailed TSP this morning, and hopefully i'll be able to change my order, and get 7.425's instead.
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Comp 223/230 .610/.608 112+0 | PRC .650" Dual Springs | Comp Trunion Upgrade | Rotofab CAI | LS7 MAF |102 mm MAF Housing |Blox VS |1 3/4 Pacesetter LT's | 2.5" Header Back Custom Exhaust | Yank SS 3200 stall | Deep Sump 6L80e Pan Kit | B&M 70273 Trans Cooler |HPTuners Pro v2.24 | Street Tuned | 7.80@91.05mph 1.79 60'
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Old 01-03-2013, 11:45 AM   #14
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Sounds good. Glad thread helped. Here's a thread I posted on some good info I compiled while planning my next mods. Check it out:

http://www.g8board.com/forums/showthread.php?t=66208
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Vector Motorsports 91 octane tune, VCM OTR CAI, VMS HSRK, 20" Breyton GTS matte black

2009 G8 GT
Completed: Livernois 91 octane tune, carbon fiber Rotofab CAI, SLP headers and catback, Flowmaster exhaust, AC Delco MAF, BFG g-Force Sport Comp 2 tires on black Camaro 19s, partial chrome delete, complete badge delete, RF 1000.1bd amp w/ 2 RF P3D4 subs
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Old 01-03-2013, 12:26 PM   #15
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Pat G spec'd my cam out and also stated to get hardened 7.4 pushrods. My cam isn't radical though, and my heads are stock.
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Old 01-03-2013, 12:47 PM   #16
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What's your cam spec? I'm getting a 218/230 Pat G cam but going 7.425"
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Vector Motorsports 91 octane tune, VCM OTR CAI, VMS HSRK, 20" Breyton GTS matte black

2009 G8 GT
Completed: Livernois 91 octane tune, carbon fiber Rotofab CAI, SLP headers and catback, Flowmaster exhaust, AC Delco MAF, BFG g-Force Sport Comp 2 tires on black Camaro 19s, partial chrome delete, complete badge delete, RF 1000.1bd amp w/ 2 RF P3D4 subs
Coming Soon: Cam/DOD delete
Saving For: CTS-V

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Old 01-04-2013, 12:35 PM   #17
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TSP confirmed this morning the change to 7.425's. Thanks Rick and everybody for the recommendation.
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Comp 223/230 .610/.608 112+0 | PRC .650" Dual Springs | Comp Trunion Upgrade | Rotofab CAI | LS7 MAF |102 mm MAF Housing |Blox VS |1 3/4 Pacesetter LT's | 2.5" Header Back Custom Exhaust | Yank SS 3200 stall | Deep Sump 6L80e Pan Kit | B&M 70273 Trans Cooler |HPTuners Pro v2.24 | Street Tuned | 7.80@91.05mph 1.79 60'
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Old 01-04-2013, 04:28 PM   #18
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Talked to my machinist today and he mentioned you want to get a proper measurement. Mine ended up being 7.450 due to the cam. I have no lifter tick at all, even with LS7 lifters. He mentioned you need to check pre-load and that even the same cams can be different depending on how they are ground. He said to use an adjustable rod to figure out the correct length and preload.
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