ZR1 ... Z28 (any similarities)
03-12-2011, 06:54 PM
#4
Melting Slicks
There is only one series of ZR-1 Vettes (plz note 'dash' so not to be confused with the C6 ZR1) and all had the LT5 engine...nothing compares then and nothing compares now in the Vette engine line up. Thus the 'Heart of the Beast'
Michael
Michael
03-12-2011, 07:21 PM
#5
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Co-winner 2020 C4 of the Year - Modified
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St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20
03-12-2011, 08:37 PM
#6
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Yeah, this is quite a thread. I like the freight train comparison. I've told people my gmc dually crew cab 4x4 454 4L80 with a GV OD was like taking the train. It cruises at 60mph at 1300rpm. I can't relate to a "it doesnt run like something" comment. I wanted to know what it did run like not what it didnt run like.
Thanks guys. I better drive one before I click the buy it now on this ebay car.
Thanks guys. I better drive one before I click the buy it now on this ebay car.
Last edited by Tim_Ko; 03-12-2011 at 08:41 PM.
03-12-2011, 08:47 PM
#7
Le Mans Master
well there are a few similarities, both of them scream at 7k rpms
the modern lt5 at 405 net hp pulls pretty good in comparison to the z28 302 but both are very strong engines
take a ride in a good running zr1 and you'll see
the modern lt5 at 405 net hp pulls pretty good in comparison to the z28 302 but both are very strong engines
take a ride in a good running zr1 and you'll see
03-12-2011, 10:22 PM
#8
Burning Brakes
See below for a *very* interesting thread about a bone stock '69 Z28. 302s were (and are) no joke. I've seen some bone stock 90 ZR-1s barely over 300rwhp on a dyno...
http://forums.corvetteforum.com/c1-a...o-results.html
Brian A.
90 ZR-1
12.09@118
01 Z06
not quite stock
http://forums.corvetteforum.com/c1-a...o-results.html
Brian A.
90 ZR-1
12.09@118
01 Z06
not quite stock
03-13-2011, 01:27 AM
#9
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St. Jude Donor '05
the zr1 will destroy the z/28.
03-13-2011, 08:41 AM
#10
Le Mans Master
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Back in the day, the 302 Z28s had a lot of the guys with 327s and 350s doing a lot of
I never saw a dyno sheet on a 302 before, and now I see why those Z28s were sucha killer in their day...or even now, for that matter!An LT5 making only 300 at the rear wheels...has issues
; secondaries not opening all the way, or??? 335 rwhp = nominal for the 375 hp LT5. But, aside from that, the dyno sheet torque/hp characteristics of that 302 curve shape are surprisingly close to my LT5. So, what I know from driving a Z with the LT5, I can imagine the grin factor driving a 69 Z28 must have put on the faces of those lucky enough to have one!Interesting stuff.
P.
03-13-2011, 09:35 AM
#11
Le Mans Master
A lightly modded LT-5 ie top end port and headers will get you close to 400rwhp when done right. Since the hp curve flattens out and doesn't really drop like the OHV motors, the car just keeps pulling. It's amazing to see and feel how quickly an LT-5 hustles on top end. It's as if it's running away from you. Like an Energizer Bunny, just keeps going and going and going and going....
03-13-2011, 10:29 AM
#12
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St. Jude Donor '05
The 302 was a huge disappointment for me, they have no torque at all..even with some gear they gain rpm but you dont get that oomhp you get from the LT5 when it really hits the powerband.
Love those little 302s but the LT5 will walk away from it every time.
Betting this ones been geared and a little warmed over. Sounds great
Love those little 302s but the LT5 will walk away from it every time.
Betting this ones been geared and a little warmed over. Sounds great
Last edited by cv67; 03-13-2011 at 11:50 AM.
03-13-2011, 11:51 AM
#13
Racer
I have owned, and driven both extensively, (a 69 Z28, and a 91' ZR-1).
Back in the day, (early seventies), the 69' Z28 was one the last cars to have that great high revving small block Chevy feel, along with the very last ones the LT1 Z28 Camaro, and Corvette. Mine had 4.56 gears , aluminum flywheel, dual point distributor. It didn't have the enormous torque of a big block, but damn what a show it would put on in first and second gear, great street machine.
A better comparison though would have been my old 63' split window coupe with the 340hp. 327. Solid lifters, 4.56 gear, and a big quadrajet off an Olds. That car could get the jump on more than one L88 I encountered if the other car didn't have a good sticky tire to help off the line. But once the big blocks hooked up it was all over
Both of these engines have a similar personality to the first Chevy motor I feel in love with 50 years ago, the 283 punched out to 302c.i. Solid lifters, Duntov cam, (mine was in my 57' Chevy), the first of the badass Chevy screamers.
All of these motors were great fun to drive, and held their own on the street, at least in the first two gears.
Back in the day, (early seventies), the 69' Z28 was one the last cars to have that great high revving small block Chevy feel, along with the very last ones the LT1 Z28 Camaro, and Corvette. Mine had 4.56 gears , aluminum flywheel, dual point distributor. It didn't have the enormous torque of a big block, but damn what a show it would put on in first and second gear, great street machine.
A better comparison though would have been my old 63' split window coupe with the 340hp. 327. Solid lifters, 4.56 gear, and a big quadrajet off an Olds. That car could get the jump on more than one L88 I encountered if the other car didn't have a good sticky tire to help off the line. But once the big blocks hooked up it was all over
Both of these engines have a similar personality to the first Chevy motor I feel in love with 50 years ago, the 283 punched out to 302c.i. Solid lifters, Duntov cam, (mine was in my 57' Chevy), the first of the badass Chevy screamers.
All of these motors were great fun to drive, and held their own on the street, at least in the first two gears.
03-13-2011, 02:08 PM
#14
Burning Brakes
Not bad for a lil' 302... 
Could listen to them all day..
http://www.youtube.com/watch?v=JiuJ1...eature=related
Brian A.
90 ZR-1
12.09@118
01 Z06
not quite stock
Could listen to them all day.. http://www.youtube.com/watch?v=JiuJ1...eature=related
Brian A.
90 ZR-1
12.09@118
01 Z06
not quite stock
03-14-2011, 06:08 PM
#15
Burning Brakes
The 302 was a huge disappointment for me, they have no torque at all..even with some gear they gain rpm but you dont get that oomhp you get from the LT5 when it really hits the powerband.
Love those little 302s but the LT5 will walk away from it every time.
Betting this ones been geared and a little warmed over. Sounds great
Love those little 302s but the LT5 will walk away from it every time.
Betting this ones been geared and a little warmed over. Sounds great
I love the sound of that car, very cool.
03-16-2011, 09:37 PM
#17
Le Mans Master
The 302 was a huge disappointment for me, they have no torque at all..even with some gear they gain rpm but you dont get that oomhp you get from the LT5 when it really hits the powerband.
Love those little 302s but the LT5 will walk away from it every time.
Betting this ones been geared and a little warmed over. Sounds great
Love those little 302s but the LT5 will walk away from it every time.
Betting this ones been geared and a little warmed over. Sounds great
03-17-2011, 05:03 PM
#18
NCM Lifetime # 982
"ZR1 ... Z28 (any similarities)"
Well they both start with Z
Well they both start with Z
03-18-2011, 05:28 AM
#20
Le Mans Master
Member Since: Oct 2004
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If it matters, actually...it was the 383 block with the 3.25" crank of the 327 that combined to make the 302s. Latter versions saw the bigger journal cranks added.