Max HP from a C6 - CorvetteForum - Chevrolet Corvette Forum Discussion

Notices
C6 Tech/Performance LS2, LS3, LS7, LS9 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Max HP from a C6

Old 08-10-2018, 03:03 AM
  #1  
hsv-gts
Junior Member
Thread Starter
 
Member Since: Nov 2016
Posts: 38
Thanked 0 Times in 0 Posts
Default Max HP from a C6

Hi guys,
Wondering if someone can give me an indication of the sort of power that the LS2 bottom end and T56 can handle before someone would need to look at strengthening them.
Cheers all
hsv-gts is offline  
Old 08-10-2018, 03:49 PM
  #2  
ZincGT
CF Senior Member
 
Member Since: Jul 2014
Location: Denver Colorado
Posts: 229
Thanked 20 Times in 17 Posts
Default

I made 830ish on my stock bottom end and ran it like that for a year before I put a forged rotating assembly in. With the 402 I made over 1000 with the stock t-56 which finally broke at the track last month.
ZincGT is online now  
Old 08-10-2018, 04:11 PM
  #3  
saplumr
CF Senior Member
Support Corvetteforum!
 
saplumr's Avatar
 
Member Since: Oct 2005
Location: Saint Albans, WV
Posts: 11,502
Thanked 114 Times in 100 Posts
Default

As long as you don't beat on it daily 750-850 and maybe 900.
saplumr is online now  
Old 08-10-2018, 08:15 PM
  #4  
hsv-gts
Junior Member
Thread Starter
 
Member Since: Nov 2016
Posts: 38
Thanked 0 Times in 0 Posts
Default

Thanks guys.
hsv-gts is offline  
Old 08-10-2018, 08:36 PM
  #5  
timd38
CF Senior Member
 
timd38's Avatar
 
Member Since: Aug 2005
Location: Hudson WI
Posts: 13,523
Thanked 143 Times in 132 Posts
NCM Sinkhole Donor
Default

If you have a 2005, the diff will go first.
timd38 is offline  
Old 08-10-2018, 09:08 PM
  #6  
hsv-gts
Junior Member
Thread Starter
 
Member Since: Nov 2016
Posts: 38
Thanked 0 Times in 0 Posts
Default

Originally Posted by timd38 View Post
If you have a 2005, the diff will go first.
My pride and joy is slightly different. It's 07 HSV (Holden Special Vehicle) which is basically a C6 Vet in different cloths.
hsv-gts is offline  
Old 08-15-2018, 04:06 PM
  #7  
mellojoe
CF Senior Member
 
mellojoe's Avatar
 
Member Since: Feb 2018
Location: Arizona
Posts: 216
Thanked 28 Times in 22 Posts
Default

Originally Posted by hsv-gts View Post
My pride and joy is slightly different. It's 07 HSV (Holden Special Vehicle) which is basically a C6 Vet in different cloths.
I think those were sold similarly in USA as Pontiacs, the GTO coupe and the G8 Sedan.
mellojoe is offline  
Old 08-15-2018, 10:13 PM
  #8  
cuisinartvette
CF Senior Member
 
Member Since: Oct 2004
Location: Valencia Ca.
Posts: 67,299
Thanked 1,042 Times in 957 Posts
St. Jude Donor '05
Default

Depends to a point on how you drive.
Some break everything they touch, others drive cars a lifetime 'hard' without breaking a thing.
In the end its all a crapshoot, just build it.
cuisinartvette is online now  
Old 08-16-2018, 08:53 PM
  #9  
Dano523
CF Senior Member
 
Member Since: Dec 2013
Posts: 6,960
Thanks: 0
Thanked 990 Times in 805 Posts
Default

Originally Posted by hsv-gts View Post
Hi guys,
Wondering if someone can give me an indication of the sort of power that the LS2 bottom end and T56 can handle before someone would need to look at strengthening them.
Cheers all
Crank will hold 1K, OEM pistons and connecting rods, about 650 with roots blower since it going to be making pressures from idle up, hence motor torque is going to be linear maxed from just above idle up. If your using a concentrically S/C, where your only on a boost for a few seconds at most for say strip runs, have see guys run up to 750 HP, but then again, only seeing a short boost for a few second max. If you were going to road coarse the car under boost hits over and over again for 45 mins each time, then limit the HP to about 650 with boost on the OEM bottom end.

As for T56 trans, it will be fine for 650 HP and torque so long as you don't get into wheel hop, but problem will be with the diff isntead. Hence diff case cracking from the torque of the pinion to ring gear against the case, and/or output shafts snapping instead. Hence more a wheel-hop thing, but can launch hard enough without wheel hop with enough tire grip to grenade diff case.


Last edited by Dano523; 08-16-2018 at 08:54 PM.
Dano523 is offline  
Old 08-18-2018, 08:03 PM
  #10  
saplumr
CF Senior Member
Support Corvetteforum!
 
saplumr's Avatar
 
Member Since: Oct 2005
Location: Saint Albans, WV
Posts: 11,502
Thanked 114 Times in 100 Posts
Default

Originally Posted by Dano523 View Post
Crank will hold 1K, OEM pistons and connecting rods, about 650 with roots blower since it going to be making pressures from idle up, hence motor torque is going to be linear maxed from just above idle up. If your using a concentrically S/C, where your only on a boost for a few seconds at most for say strip runs, have see guys run up to 750 HP, but then again, only seeing a short boost for a few second max. If you were going to road coarse the car under boost hits over and over again for 45 mins each time, then limit the HP to about 650 with boost on the OEM bottom end.

As for T56 trans, it will be fine for 650 HP and torque so long as you don't get into wheel hop, but problem will be with the diff isntead. Hence diff case cracking from the torque of the pinion to ring gear against the case, and/or output shafts snapping instead. Hence more a wheel-hop thing, but can launch hard enough without wheel hop with enough tire grip to grenade diff case.

How did that not snap the mainshaft?
saplumr is online now  
Old 08-22-2018, 02:49 PM
  #11  
Woodstoc
CF Senior Member
 
Woodstoc's Avatar
 
Member Since: Oct 2001
Location: Atasocita Tx
Posts: 781
Thanked 15 Times in 13 Posts
Default

I've been running a PD SC for about a year now, making 550/560 with occasional runs down the 1/8 and 1/4 mile, and lots of horsing around. Stock bottom end, A6 and diff. Still going strong with no issues.
Woodstoc is offline  


Thread Tools
Search this Thread
Quick Reply: Max HP from a C6


Sponsored Ads
Vendor Directory

Contact Us About Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: