ZR1 officially 638 HP

[snakeskin]

Originally Posted by twinturbo3150

that's because your going to need it

[Torquemonster]

I'm willing to wager that 638rwhp is detuned sigificantly on what some test mules have been running at, and that a lot more is on tap without much drama.

My biggest beef with GM and Ford performance engines is that they are mass produced and lack the blueprint precision of the hand built SRT engines let alone performance Japanese and Euro engines. If the ZR1 came with a genuinely hand built blueprinted long block, THEN I'd be impressed (maybe they are I've not bothered to find out). The LS2,6,7's can all make great power hotted up but one in every batch will blow up prematurely because it was not as good as it's cousin along the production line.

Engines as light as the LS engines need to be blueprinted if taken much beyond stock spec because they move around so much... the blocks are hopeless for serious racing due to bore movement etc. Great design features however. A better casting heavier alloy block and hand built version would be epic.... something like the Haigh block (PBM), but I digress.

gas prices - what are you guys complaining about? We pay $7.80 per US gal for premium. No big deal, just go earn more

[The Former PFR]

Originally Posted by Torquemonster

I'm willing to wager that 638rwhp is detuned sigificantly on what some test mules have been running at, and that a lot more is on tap without much drama.

My biggest beef with GM and Ford performance engines is that they are mass produced and lack the blueprint precision of the hand built SRT engines let alone performance Japanese and Euro engines. If the ZR1 came with a genuinely hand built blueprinted long block, THEN I'd be impressed (maybe they are I've not bothered to find out). The LS2,6,7's can all make great power hotted up but one in every batch will blow up prematurely because it was not as good as it's cousin along the production line.

Engines as light as the LS engines need to be blueprinted if taken much beyond stock spec because they move around so much... the blocks are hopeless for serious racing due to bore movement etc. Great design features however. A better casting heavier alloy block and hand built version would be epic.... something like the Haigh block (PBM), but I digress.

gas prices - what are you guys complaining about? We pay $7.80 per US gal for premium. No big deal, just go earn more

Ls7 engines are hand build, as are Ls9s.

[Torquemonster]

Originally Posted by The Former PFR

Ls7 engines are hand build, as are Ls9s.

good to know. So, given LS7's still blow up quite offten that just proves the LS2-7 castings are too poor to get serious with.

LS9's will no doubt be stouter and have a better than 10mm deck thickness shared by the earlier LS series alloy blocks. How stable they are however will have to wait until a few serious engine builders have pulled them down and put them to the test.

BTW - A haigh block powered LS looks set to crack a 6 second pass making it the first LS block powered car to do so, hopefully within 2 weeks.... they ran a 7.0 last time out. The Ford mod block has already achieved that feat but is much heavier. So watch the LS forums for the big scoop and yehaa's once the LS gets its first 6. Turbo'd of course.

[ViperLuv]

Originally Posted by Makara

There are fox body mustangs that will outrun you both. Talk stock vs stock or modded vs modded otherwise, to me at least, it just means nothing.

Good point.

Apples to apples.