destroked motor?
Thread Starter
TECH Fanatic
Joined: Mar 2003
Posts: 1,112
Likes: 0
From: Dallas
destroked motor? Has anyone on here done a destroked motor with heads/cam? I was wondering what kinda results if you did lets say a 4.125 bore with the crank out of 4.8L motor?
How high could you spin a setup like this?
How high could you spin a setup like this?
It has a 3.27" stroke so with a 4.125" bore it makes a 350 cube motor.
That stroke/bore combo is about what NASCAR motors are. So if you had the parts all strong enough you could go to 9K rpm pretty easily.
On a stock crank it would be safe probably to about 8K.
The question is why?
Bret
That stroke/bore combo is about what NASCAR motors are. So if you had the parts all strong enough you could go to 9K rpm pretty easily.
On a stock crank it would be safe probably to about 8K.
The question is why?
Bret
I have a 4.8 crank for sale, $100 shipped it has less than 500 miles on it.
One reason to do this would be to build an engine that fits classes that are cube restricted.
Another reason is nostalgia.
One reason to do this would be to build an engine that fits classes that are cube restricted.
Another reason is nostalgia.
Trending Topics
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 Thread Starter
TECH Fanatic
Joined: Mar 2003
Posts: 1,112
Likes: 0
From: Dallas
With light/expensive valvetrain components, couldnt you spin one of these motors over 9000rpm?
Strokers are good for the track but on the street I'd rather have a high revving motor that makes crazy hp up top. Torque down low just spins the tires on the street.
Strokers are good for the track but on the street I'd rather have a high revving motor that makes crazy hp up top. Torque down low just spins the tires on the street.
Problem is short stroke big bore engines don't really feel good till upper rpms and really for a street car moderate driving they are no ideal. Now if you want something to rip on the weekends and leave from a dead stop at 6000, then yes the are fun.
Depending on airflow a 302 inch motor can make around 600HP, but that would not be streetable.
Cstraub
Depending on airflow a 302 inch motor can make around 600HP, but that would not be streetable.
Cstraub
Kumar, you would need an intake that works up there, and you would need a lot of good parts.
Heck 8000 rpms would be a huge difference from our motors you would not need 9000. It was sick sounding listen to a friend wind out his S2000.
You would need lightweight valvetrain parts, and maybe a custom intake.
Heck 8000 rpms would be a huge difference from our motors you would not need 9000. It was sick sounding listen to a friend wind out his S2000.
You would need lightweight valvetrain parts, and maybe a custom intake.
Thread Starter
TECH Fanatic
Joined: Mar 2003
Posts: 1,112
Likes: 0
From: Dallas
I used to have an S2000. 
I can only imagine what a Ls1 at 9000 would be like. I talked to a few people about this and it can be done but very very expensive. Mainly, I would need a really light rotating assembly.
I can only imagine what a Ls1 at 9000 would be like. I talked to a few people about this and it can be done but very very expensive. Mainly, I would need a really light rotating assembly.
TECH Fanatic
Joined: Jun 2002
Posts: 1,979
Likes: 3
From: Upstate NY
Originally Posted by kumar75150
I used to have an S2000.
I can only imagine what a Ls1 at 9000 would be like. I talked to a few people about this and it can be done but very very expensive. Mainly, I would need a really light rotating assembly.
I can only imagine what a Ls1 at 9000 would be like. I talked to a few people about this and it can be done but very very expensive. Mainly, I would need a really light rotating assembly.
On The Tree
Joined: Jul 2002
Posts: 179
Likes: 0
From: Texas
I don't see the benefits of doing this unless, as stated above was to make a certain class. Also I would think that you would need a external oil pump and a good oiling system to keep up with a engine that spins 9Krpms. Piston speed is a concern and you would have to run a long rod. I would think that it would be to hard on parts to run it at 9k rpms, but it would be bad *** to hear a ls1 rev that high.
FormerVendor
Joined: Nov 2001
Posts: 3,065
Likes: 6
From: Houston, Tx.
Originally Posted by Evo98z
I don't see the benefits of doing this unless, as stated above was to make a certain class. Also I would think that you would need a external oil pump and a good oiling system to keep up with a engine that spins 9Krpms. Piston speed is a concern and you would have to run a long rod. I would think that it would be to hard on parts to run it at 9k rpms, but it would be bad *** to hear a ls1 rev that high.
Even with all that going for it at least it wouldn't be too reliable and would require a lot more maintenance and that's always cool. You could put really long rods in it too which should generate tremendous internet power and envy (Hey, and they'll weigh more too!). It would be kind of like a real race motor without the real power but yet still with the real cost. Not trying to be overly sarcastic but it's hard to beat an idea like this unless you think on it more than a minute or so. OTOH if you value rpm over power and reliability then go for it. It's been done often with some truly apalling results but you'll be always be guaranteed to be the "unique" one if that's what people want. You could also paint the car lime green and purle metal flake too.
TECH Addict
Joined: Nov 2001
Posts: 2,207
Likes: 0
From: College Station, Tx
Or just build a stroker with as much power as you can and then buy a nice aftermarket/race traction control - you don't have to worry about traction plus you go faster.
It seems to me builidng a motor for less power is a somewhat backwards approach - you could achieve the same thing by not going full throttle (reduced power output). Money (traction control) or skill (driving ability) - both would still be cheaper, better, and probably faster than builidng a 9000 rpm "street" motor.
It seems to me builidng a motor for less power is a somewhat backwards approach - you could achieve the same thing by not going full throttle (reduced power output). Money (traction control) or skill (driving ability) - both would still be cheaper, better, and probably faster than builidng a 9000 rpm "street" motor.