4.8 crank in a 6.2 block
Destroked LS1 also pulls up a ton of responses on the ol google thing as an FYI.
as a double FYI, I dont work for Comp cams, I dont run their short travel lifters... I simply used the search function.
Staging Lane
Joined: Feb 2005
Posts: 97
Likes: 2
From: Lynbrook, NY
Quoting Larry Widmer: "RPM means ruins people's motors".
BTW: you don't get the difference in stroke lengths as an RPM increase: 3.622 / 3.268 = +10.8%.
At the same tensile load on the rod (what determines breakage, assuming the valve train is stable and reciprocating mass is constant), the RPM increase varies as the dividend of the square roots: 3.622^.5 / 3.268^.5 = +5.3%.
7,000 RPM becomes 7,369, not 7,758.
BTW: you don't get the difference in stroke lengths as an RPM increase: 3.622 / 3.268 = +10.8%.
At the same tensile load on the rod (what determines breakage, assuming the valve train is stable and reciprocating mass is constant), the RPM increase varies as the dividend of the square roots: 3.622^.5 / 3.268^.5 = +5.3%.
7,000 RPM becomes 7,369, not 7,758.
Last edited by panic; Mar 23, 2016 at 08:05 PM.
Thread Starter
Teching In
Joined: Jul 2007
Posts: 31
Likes: 2
Sorry Guys,
I was away a couple days. I read the article from HotRod Mag.
It sounded very interesting. I have a 78 Chevy Monza that weighs in
at barely 2800. I can agree that it seems crazy to throw away all those
cubes, But I have also always been a sucker for the exotic. I am interested
to build the motor with a twin turbo setup. I most wanted everyone's opinions
so I could weigh the goods and bads and hopefully make an informed decision.
The porpose of the motor would be street and an occasional blast down the strip.
Thanks Everyone
I was away a couple days. I read the article from HotRod Mag.
It sounded very interesting. I have a 78 Chevy Monza that weighs in
at barely 2800. I can agree that it seems crazy to throw away all those
cubes, But I have also always been a sucker for the exotic. I am interested
to build the motor with a twin turbo setup. I most wanted everyone's opinions
so I could weigh the goods and bads and hopefully make an informed decision.
The porpose of the motor would be street and an occasional blast down the strip.
Thanks Everyone
Last edited by chevydarrell; Mar 23, 2016 at 09:03 PM. Reason: forgot something
TECH Addict
Joined: Jul 2013
Posts: 2,189
Likes: 123
From: Portland, Oregon
In a really lightweight vehicle, the shorter stroke can almost act as traction control by delaying the torque delivery a little bit. The smaller displacement will also be beneficial in this regard.
Using rectangle port heads instead of cathedral ports should also help move the majority of your available torque higher into the powerband.
Using rectangle port heads instead of cathedral ports should also help move the majority of your available torque higher into the powerband.
Some of you guys are acting like a drag car operates over the entire rpm range. Put the right converter in it and who gives a **** how much torque it makes. Just stirring the pot a bit lol.
Exactly. That is why I have always thought the famous quote by Carroll Shelby, "Horsepower sells cars, torque wins races." Is a complete load of crap.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
If you size the twin turbos, cam, and converter correctly that will take care of the torque for daily driving and launch at the strip. And at "barely 2800lbs" I think a twin turbo short stroke 330 would be excellent.
Thread Starter
Teching In
Joined: Jul 2007
Posts: 31
Likes: 2
Thanks Everyone for your input!! There are many things to consider!
Would be far cheaper to just put the turbo on a 5.3L and call it good.
thanks so much,
Darrell
Would be far cheaper to just put the turbo on a 5.3L and call it good.
thanks so much,
Darrell
Last edited by chevydarrell; Mar 27, 2016 at 04:58 PM.