Is anyone making reproduction lt5 blocks?
07-09-2004, 12:55 AM
#21
Originally Posted by XxXTransAmXxX
The LT5 ZR1 Vette had a Valet key that made 350HP, the MASTER key untapped all 405HP
90-92 was 375 hp 93-95 405. Relatively minor differences in the motors.
The "Valet Key" turn off opened up the second set of injectors. I believe turned on the motor was around 225 hp
If you want a LT-5 You are better off buying a ZR-1. You can pick a nice to decent one up in the low 20's And yes, they are very expensive to mod.
Although there is a machinist in Georgia that is starting to offer porting of the intake and heads at 1/2 the price of the big name tuners such as LPE and Rippie.
The strength of the LT-5 is durability and High RPM operation. A basically stock car went ***** out for 24hrs non-stop at an average of 175mph. Broke all speed endurance records. The motor was light years ahead of its time. Designed by LOTUS and GM Built by Mercury-Marine I believe.
07-15-2004, 01:39 PM
#23
Launching!
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Originally Posted by XxXTransAmXxX
I'm not sure the LT5 will fit in an Fbody tho either...
If I had the money Id much rather have an LT5 than an LS6, the heads on it are capable of flowing nearly 400cfm when worked right(vs. 350-360cfm max for LS6 castings).
Check out this ZR1, It makes over 900hp and runs 8.60's NATURALLY ASPIRATED:
http://www.fastlane-racing.com/performa.htm
07-14-2012, 02:02 AM
#24
Staging Lane
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07-14-2012, 07:25 AM
#26
Anyone that pays premium money expects a premium motor, thats exactly what GM gave them.
You have to remember, at the time the TPI was as bad as it got for stock GM motors. Dont compare it to LSX as it wasnt even developed yet. They were still working on Gen II LTx motors I would think.
07-14-2012, 09:41 AM
#30
This is just how companies do things sometimes. They take a gamble and see what happens sometimes it works out sometimes it doesn't.
07-14-2012, 10:21 AM
#31
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The guy is NEVER EVER positive. Always running everybody and every idea down, a real Jerk. I can tell its him just by reading the post, before i even look at the name. Ha. Can someone tell me how to copy a post or quote on the iphone please.
07-14-2012, 01:04 PM
#34
I am wrong it cost $100 for the LT5 R&D and only $95 to build each one and the mods to the ZR-1 car only cost GM another $1.50 so they made a killing and that is why they stopped offering it. They made money money than they knew what do do with and I am SURE of that.
07-14-2012, 11:23 PM
#35
07-14-2012, 11:52 PM
#36
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I have said it for years the lt5 is the best motor ever made by gm IMO sadly tooling cost
And it's quad over head cam
the only swap I will do in my vette I'm not going t56 I love my zf trans to much
And it's quad over head cam
the only swap I will do in my vette I'm not going t56 I love my zf trans to much 
