lt5?
On The Tree
Joined: Jun 2004
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From: pennsylvania
Originally Posted by 91Z28
Yeah if I was rich I'd have one. Probably very hard to afford maintenance on.
Who says you have to be rich? Maintenance isn't that much more expensive than other performance cars...unless something really breaks, then your just about SOT because mechanics that are willing to work on these engines are few and far between.
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From: Midland
Originally Posted by Billsz28b4c
Who says you have to be rich? Maintenance isn't that much more expensive than other performance cars...unless something really breaks, then your just about SOT because mechanics that are willing to work on these engines are few and far between.
the aftermarket for them IS there, but just like the aftermarket for lambos and ferraris, nothing is cheap. the later LT5s were 405hp STOCK, and had a 7200rpm redline. http://www.corvetteactioncenter.com/.../lt5specs.html note the NIKASIL coated aluminum bore and MAHLE pistons. Nikasil coating on the bore drops the piston to bore friction by 80% and also extracts combustion heat faster than a steel liner. 10,000 RPM aluminum block High Perf outboards have been using this technology for almost 30 years. Although, blow something up in a nikasil bore motor, and the block needs to be re-coated for something like $1000 per hole. 
dont be fooled by 13 second lt5s... they will eat most cars lunch from a 60mph roll. If the owner of that LT5 is a car guy, I can almost gurantee that it isnt 405hp anymore. As much as I love the Pushrod motors, I hope that GM resurrects this engine in some form in the future. the output possibilities from the lt5 is absolutely INSANE.
if something breaks... fix it yourself. Because of the situation of no mechanics wanting to work on these, parts and part manuals are redily available to the general public. its just a tpi on steroids man!
dont be fooled by 13 second lt5s... they will eat most cars lunch from a 60mph roll. If the owner of that LT5 is a car guy, I can almost gurantee that it isnt 405hp anymore. As much as I love the Pushrod motors, I hope that GM resurrects this engine in some form in the future. the output possibilities from the lt5 is absolutely INSANE.
if something breaks... fix it yourself. Because of the situation of no mechanics wanting to work on these, parts and part manuals are redily available to the general public. its just a tpi on steroids man!
Originally Posted by 1BadAction
the aftermarket for them IS there, but just like the aftermarket for lambos and ferraris, nothing is cheap. the later LT5s were 405hp STOCK, and had a 7200rpm redline. http://www.corvetteactioncenter.com/.../lt5specs.html note the NIKASIL coated aluminum bore and MAHLE pistons. Nikasil coating on the bore drops the piston to bore friction by 80% and also extracts combustion heat faster than a steel liner. 10,000 RPM aluminum block High Perf outboards have been using this technology for almost 30 years. Although, blow something up in a nikasil bore motor, and the block needs to be re-coated for something like $1000 per hole.
dont be fooled by 13 second lt5s... they will eat most cars lunch from a 60mph roll. If the owner of that LT5 is a car guy, I can almost gurantee that it isnt 405hp anymore. As much as I love the Pushrod motors, I hope that GM resurrects this engine in some form in the future. the output possibilities from the lt5 is absolutely INSANE.
if something breaks... fix it yourself. Because of the situation of no mechanics wanting to work on these, parts and part manuals are redily available to the general public. its just a tpi on steroids man!
dont be fooled by 13 second lt5s... they will eat most cars lunch from a 60mph roll. If the owner of that LT5 is a car guy, I can almost gurantee that it isnt 405hp anymore. As much as I love the Pushrod motors, I hope that GM resurrects this engine in some form in the future. the output possibilities from the lt5 is absolutely INSANE.
if something breaks... fix it yourself. Because of the situation of no mechanics wanting to work on these, parts and part manuals are redily available to the general public. its just a tpi on steroids man!
Matt
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From: Midland
Yeah I'm pretty sure I saw a dyno graph where one was redlining at 8700 rpm. A lot of them run 12:1 compression on pump gas as well, don't ask me how. I've also heard that it has hemispherical heads but have never been able to confirm it.
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From: Midland
Look what I just found:
http://temp.corvetteforum.net/c4/doctorv8/
This guy bought the LPE 415 CI LT5 660 hp option and now uses the original LT5 for an end table! $$$$$$$$$$
http://temp.corvetteforum.net/c4/doctorv8/
This guy bought the LPE 415 CI LT5 660 hp option and now uses the original LT5 for an end table! $$$$$$$$$$
Originally Posted by Billsz28b4c
The reason that these cars (ZR1's) do so poorely in the 1/4 mile is due to the lack of traction, and the fact that the car doesnt really come alive until it is just pasing the marks at the end of the track.
Here was my baby before I sold her...
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Staging Lane
Joined: Aug 2005
Posts: 78
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From: The City of Trees
When I first joined my corvette club I was listening to all the aftermarket exhausts of the other members during a parade we participated in. The very best sounding exhaust was coming from a black C4. I went to investigate and sure enough it was a ZR-1. Those things sound SICK. If only there was a way to make an LT1 sound like that, but it's probably impossible.
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From: Midland
Originally Posted by Fulton 1
Get yourself some 4.10's in that thing if you haven't done so already. It'll be a whole different animal down low.
Here was my baby before I sold her...
Here was my baby before I sold her...
Originally Posted by 91Z28
Look what I just found:
http://temp.corvetteforum.net/c4/doctorv8/
This guy bought the LPE 415 CI LT5 660 hp option and now uses the original LT5 for an end table! $$$$$$$$$$
http://temp.corvetteforum.net/c4/doctorv8/
This guy bought the LPE 415 CI LT5 660 hp option and now uses the original LT5 for an end table! $$$$$$$$$$
There is an aftermarket out for the LT5/ZR1 and there are mechanics to work on them. You have to get involved with the Zr1 Registry to find the shops. A shop in South Georgia has recently completed a new Twin Turbo package for 550 rwhp and no internal mods. Another shop is working on larger sleeves, the 415s are built with a 4" bore. So there is still R&D going on for motor that has not been built in 10 years.
They are not cheap but not as crazy as many seem to think. You can get 400+rwhp with polishing the plenum/injector housings and full bolt ons.
Last edited by 93Polo; Oct 26, 2005 at 11:43 AM.
the combustion chambers are pent-roof style with 4valves per cylinder, which btw, is why they sound so good. a hemi head would never work with more than 2 valves, the valve angles in that setup would be pointing 4 different ways 
I almost had a LT5 out of a wrecked zr1 for $12,000. to swap into my iroc/t-56... but I found out that I had to use the ZR1 tranny also. So I canned that Idea, didnt feel like doing ANOTHER tranny swap on that car. LOL.
I almost had a LT5 out of a wrecked zr1 for $12,000. to swap into my iroc/t-56... but I found out that I had to use the ZR1 tranny also. So I canned that Idea, didnt feel like doing ANOTHER tranny swap on that car. LOL.
Staging Lane
Joined: May 2005
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Originally Posted by Billsz28b4c
Sorry man, im not calling your story BS, but I find that EXTREMELY hard to beleive...I think I can chime in on this considering I own a ZR1. The only way that could be possible is if the vette had some serious traction problems off the line (or didnt have the secondary set of fuel injectors turned on 
). Even considering the tractions problems after about 50mph or so the vette would pull BIG TIME on the camaro. I have raced many cars with my vette, even full bolt-on ls1 f-bods arent a race (and they are NOT slow cars). The only lsx based cars somewhat comparable to a zr1 are the C5 ZO6's and the C6 coupes....and even then after about 80+ mph the LT5 engine will start to pull on them. I'm not going to even mention the new C6 ZO6 because that vehicle is on a whole different level 
. The reason that these cars (ZR1's) do so poorely in the 1/4 mile is due to the lack of traction, and the fact that the car doesnt really come alive until it is just pasing the marks at the end of the track. The closest race I had was against an 04' porshe carrera (twin turbo, awd), and that race was basically dead even the entire way up until about 145mph when we stopped. By no means am I saying that the ZR1 is "un-beatable" because it isn't, just like any other high-performance car it has its strong points and weaks points.
). Even considering the tractions problems after about 50mph or so the vette would pull BIG TIME on the camaro. I have raced many cars with my vette, even full bolt-on ls1 f-bods arent a race (and they are NOT slow cars). The only lsx based cars somewhat comparable to a zr1 are the C5 ZO6's and the C6 coupes....and even then after about 80+ mph the LT5 engine will start to pull on them. I'm not going to even mention the new C6 ZO6 because that vehicle is on a whole different level . The reason that these cars (ZR1's) do so poorely in the 1/4 mile is due to the lack of traction, and the fact that the car doesnt really come alive until it is just pasing the marks at the end of the track. The closest race I had was against an 04' porshe carrera (twin turbo, awd), and that race was basically dead even the entire way up until about 145mph when we stopped. By no means am I saying that the ZR1 is "un-beatable" because it isn't, just like any other high-performance car it has its strong points and weaks points.Sorry its hard to believe, but its true. Seen it with my own eyes. Both of them spun, the vette might have spun worse. I was at the finish. Dont know much about what the vetter driver did or didnt do other than get beat twice. I do know he wasnt pulling on him very hard on the top end though!
http://zfdoc.com/images/philsrun3.wmv
http://www.wpccc.net/vids/
If you've never heard a big cammed 415 with 3" B&Bs resonator replaced with an x pipe and cats its a must hear
I can't find a clip now.
http://www.wpccc.net/vids/
If you've never heard a big cammed 415 with 3" B&Bs resonator replaced with an x pipe and cats its a must hear
I can't find a clip now. 
Originally Posted by 1BadAction
Mercury Marine built the LT5. It was designed by Lotus. 500HP from an LT5 is cake, and the ZR1 vette (what the lt5 was in) still holds the 24hr endurance record at something like 188mph AVERAGE.
http://zr1netregistry.com/ZR1_faq.htm
http://zr1netregistry.com/ZR1_faq.htm
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From: Midland
Originally Posted by 1BadAction
the combustion chambers are pent-roof style with 4valves per cylinder, which btw, is why they sound so good. a hemi head would never work with more than 2 valves, the valve angles in that setup would be pointing 4 different ways
I almost had a LT5 out of a wrecked zr1 for $12,000. to swap into my iroc/t-56... but I found out that I had to use the ZR1 tranny also. So I canned that Idea, didnt feel like doing ANOTHER tranny swap on that car. LOL.
I almost had a LT5 out of a wrecked zr1 for $12,000. to swap into my iroc/t-56... but I found out that I had to use the ZR1 tranny also. So I canned that Idea, didnt feel like doing ANOTHER tranny swap on that car. LOL.
Originally Posted by 93Polo
http://zfdoc.com/images/philsrun3.wmv
http://www.wpccc.net/vids/
If you've never heard a big cammed 415 with 3" B&Bs resonator replaced with an x pipe and cats its a must hear I can't find a clip now.
http://www.wpccc.net/vids/
If you've never heard a big cammed 415 with 3" B&Bs resonator replaced with an x pipe and cats its a must hear
I can't find a clip now.