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09-04-2010, 06:05 PM
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#1
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DC Crew
Posts: 251
Member #91801
Member since: Sep 2009
Location: NorCal
My Corvette(s)
1977
Thanks: 0
Thanked 0 Times in 0 Posts
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Hit the Dyno today on my stock ZZ4
Well its official.... 249hp.. 252 ft lbs torq... right about where I Was think It has a little miss in it.. I think with new plugs and wires and the cam package and a little porting I Could hit 300...Looks like I have a new goal to hit... Ill be working a little extra OT to try and get the extra money for the new mods.. 
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Winner 2011 Best Shark Corvette Spectacular 2011
ZZ4 249hp252 tq.Sanderson Header 2.5 Dual Exhaust,mini starter,rebuilt th350 B&M shift kit Rebuilt front end-Lowered 3 in.rear lowered on 8 in bolts.New 4 core rad ,energy poly motor/trans mounts, Edelbrock water pump, Rebuilt TA’s,Drive-shaft ½ shaft,strut,& rear end. New solid u-joint |
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09-04-2010, 06:19 PM
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#2
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DC Crew
Posts: 1,197
Member #62397
Member since: Jul 2007
Location: Austin, Texas
My Corvette(s)
Supercharged '68C, L-79'68R, L-71'69C
Thanks: 0
Thanked 0 Times in 0 Posts
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 you got some horses hiding somewhere. Auto or stick?
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09-04-2010, 07:35 PM
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#3
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DC Crew
Posts: 1,135
Member #61498
Member since: Jun 2007
Location: Kentucky
My Corvette(s)
1971 stingray 350
Thanks: 0
Thanked 3 Times in 3 Posts
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Did you change to some long tube headers.
I would be very very interested in the results of a Lt4 hot cam swap.
If you are going to go with the hot cam all youneed is the cam and roller rockers the zz4 already comes with the right springs.
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White 1971
ZZ4 short block with AFR 180 eliminators,lt 4 hot cam with 1.6 roler rockers
Autogear M22w Rockcrusher Center force setup Hooker 1 5/8competition headers
True duals with Magna flows
Dewitts Al. rad. and dual eletric fans
vbandp suspension kit and alot more |
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09-04-2010, 07:57 PM
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#4
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DC Crew
Posts: 251
Member #91801
Member since: Sep 2009
Location: NorCal
My Corvette(s)
1977
Thanks: 0
Thanked 0 Times in 0 Posts
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Quote:
Originally Posted by big_G
you got some horses hiding somewhere. Auto or stick? |
Auto.... I may try and do the elec fans the same time i do the cam... while its apart anyway... this won be til after the new year..
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Winner 2011 Best Shark Corvette Spectacular 2011
ZZ4 249hp252 tq.Sanderson Header 2.5 Dual Exhaust,mini starter,rebuilt th350 B&M shift kit Rebuilt front end-Lowered 3 in.rear lowered on 8 in bolts.New 4 core rad ,energy poly motor/trans mounts, Edelbrock water pump, Rebuilt TA’s,Drive-shaft ½ shaft,strut,& rear end. New solid u-joint |
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09-04-2010, 08:02 PM
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#5
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DC Crew
Posts: 251
Member #91801
Member since: Sep 2009
Location: NorCal
My Corvette(s)
1977
Thanks: 0
Thanked 0 Times in 0 Posts
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Quote:
Originally Posted by ZZ71s
Did you change to some long tube headers.
I would be very very interested in the results of a Lt4 hot cam swap.
If you are going to go with the hot cam all youneed is the cam and roller rockers the zz4 already comes with the right springs.
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No I have the sanderson shortys..the car is so low in the front i worry about long tubes hitting .....
Ill be getting the cam package with everything.. I want all new in there..
Like I said I was looking for like 275-300 maybe.. so the 250 isnt to far off.. so its getting there,,
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Winner 2011 Best Shark Corvette Spectacular 2011
ZZ4 249hp252 tq.Sanderson Header 2.5 Dual Exhaust,mini starter,rebuilt th350 B&M shift kit Rebuilt front end-Lowered 3 in.rear lowered on 8 in bolts.New 4 core rad ,energy poly motor/trans mounts, Edelbrock water pump, Rebuilt TA’s,Drive-shaft ½ shaft,strut,& rear end. New solid u-joint |
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09-04-2010, 08:21 PM
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#6
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DC Crew
Posts: 1,135
Member #61498
Member since: Jun 2007
Location: Kentucky
My Corvette(s)
1971 stingray 350
Thanks: 0
Thanked 3 Times in 3 Posts
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Also the 395 hp number was produced using a Edlebrock performer rpm intake and a mech secondary carb according to the old Sally chevy sight.
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White 1971
ZZ4 short block with AFR 180 eliminators,lt 4 hot cam with 1.6 roler rockers
Autogear M22w Rockcrusher Center force setup Hooker 1 5/8competition headers
True duals with Magna flows
Dewitts Al. rad. and dual eletric fans
vbandp suspension kit and alot more |
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09-04-2010, 08:39 PM
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#7
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DC Crew
Posts: 251
Member #91801
Member since: Sep 2009
Location: NorCal
My Corvette(s)
1977
Thanks: 0
Thanked 0 Times in 0 Posts
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Quote:
Originally Posted by ZZ71s
Also the 395 hp number was produced using a Edlebrock performer rpm intake and a mech secondary carb according to the old Sally chevy sight.
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Was thinking about a new intake too.. guess id need the drop base for the air cleaner with a different intake too..
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Winner 2011 Best Shark Corvette Spectacular 2011
ZZ4 249hp252 tq.Sanderson Header 2.5 Dual Exhaust,mini starter,rebuilt th350 B&M shift kit Rebuilt front end-Lowered 3 in.rear lowered on 8 in bolts.New 4 core rad ,energy poly motor/trans mounts, Edelbrock water pump, Rebuilt TA’s,Drive-shaft ½ shaft,strut,& rear end. New solid u-joint |
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09-04-2010, 11:04 PM
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#8
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DC Crew
Posts: 179
Member #62230
Member since: Jul 2007
Location: Northern Kalifornia
My Corvette(s)
1972 coupe
Thanks: 0
Thanked 0 Times in 0 Posts
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One more cookie for the jar...not all dyno measurements are the same. I think you got missing hp somewhere too.
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09-05-2010, 12:40 AM
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#9
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DC Crew
Posts: 45
Member #83019
Member since: Mar 2009
Location: chicago, il
My Corvette(s)
1974
Thanks: 0
Thanked 0 Times in 0 Posts
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Thats on a rear wheel dyno right?
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09-05-2010, 08:25 AM
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#10
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Grey Squirrel
Posts: 19,915
Member #5040
Member since: Nov 2003
Location: In transition
My Corvette(s)
Looking
Thanks: 0
Thanked 35 Times in 20 Posts
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Nice looking car and ready to unleash the hidden HP 
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"The trouble with quotes on the Internet is that you can never know if they are genuine." - Abraham Lincoln |
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09-05-2010, 08:51 AM
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#11
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DC Crew
Posts: 251
Member #91801
Member since: Sep 2009
Location: NorCal
My Corvette(s)
1977
Thanks: 0
Thanked 0 Times in 0 Posts
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Quote:
Originally Posted by blueray72
One more cookie for the jar...not all dyno measurements are the same. I think you got missing hp somewhere too. |
Yeah Tom I was thinking the same thing... But not much.. its 360 rated and like said thats with the rpm intake..
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Winner 2011 Best Shark Corvette Spectacular 2011
ZZ4 249hp252 tq.Sanderson Header 2.5 Dual Exhaust,mini starter,rebuilt th350 B&M shift kit Rebuilt front end-Lowered 3 in.rear lowered on 8 in bolts.New 4 core rad ,energy poly motor/trans mounts, Edelbrock water pump, Rebuilt TA’s,Drive-shaft ½ shaft,strut,& rear end. New solid u-joint |
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09-05-2010, 09:20 AM
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#12
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DC Crew
Posts: 251
Member #91801
Member since: Sep 2009
Location: NorCal
My Corvette(s)
1977
Thanks: 0
Thanked 0 Times in 0 Posts
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Yeah that rear wheel
Quote:
Originally Posted by gman76
Thats on a rear wheel dyno right?
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Winner 2011 Best Shark Corvette Spectacular 2011
ZZ4 249hp252 tq.Sanderson Header 2.5 Dual Exhaust,mini starter,rebuilt th350 B&M shift kit Rebuilt front end-Lowered 3 in.rear lowered on 8 in bolts.New 4 core rad ,energy poly motor/trans mounts, Edelbrock water pump, Rebuilt TA’s,Drive-shaft ½ shaft,strut,& rear end. New solid u-joint |
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09-05-2010, 09:22 AM
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#13
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DC Crew
Posts: 251
Member #91801
Member since: Sep 2009
Location: NorCal
My Corvette(s)
1977
Thanks: 0
Thanked 0 Times in 0 Posts
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Quote:
Originally Posted by Poncherello
Nice looking car and ready to unleash the hidden HP |
Thanks man. Its still a work in progress...The never ending money pit..LOL
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Winner 2011 Best Shark Corvette Spectacular 2011
ZZ4 249hp252 tq.Sanderson Header 2.5 Dual Exhaust,mini starter,rebuilt th350 B&M shift kit Rebuilt front end-Lowered 3 in.rear lowered on 8 in bolts.New 4 core rad ,energy poly motor/trans mounts, Edelbrock water pump, Rebuilt TA’s,Drive-shaft ½ shaft,strut,& rear end. New solid u-joint |
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09-05-2010, 10:01 AM
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#14
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DC Crew
Posts: 207
Member #59081
Member since: Apr 2007
Location: Prairieville, LA
Thanks: 0
Thanked 2 Times in 2 Posts
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Not too bad. When I dynoed my 71 with the ZZ4 it made like 200 hp and 350 tq.
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09-05-2010, 06:05 PM
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#15
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DC Crew
Posts: 251
Member #91801
Member since: Sep 2009
Location: NorCal
My Corvette(s)
1977
Thanks: 0
Thanked 0 Times in 0 Posts
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Quote:
Originally Posted by ZZ71s
Also the 395 hp number was produced using a Edlebrock performer rpm intake and a mech secondary carb according to the old Sally chevy sight.
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If I was to go to a different manifold which airgap should I go with.. ? ? stock hood. ? ? and going to install the hot cam. ? ?
Also going to do a msd dist too...? ???
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Winner 2011 Best Shark Corvette Spectacular 2011
ZZ4 249hp252 tq.Sanderson Header 2.5 Dual Exhaust,mini starter,rebuilt th350 B&M shift kit Rebuilt front end-Lowered 3 in.rear lowered on 8 in bolts.New 4 core rad ,energy poly motor/trans mounts, Edelbrock water pump, Rebuilt TA’s,Drive-shaft ½ shaft,strut,& rear end. New solid u-joint |
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