Hey guys, im in a position where i have to rebuild my stock Ls1. - Lifter came apart and it failed from there... Anyway im looking around at rotating assemblies and the 347ci kits seem to be the same or close to the same price as 383ci. Other than notching the block, what are the drawbacks to stroking? From what im reading, people either love or hate stroking. I would like to know why. If its such a bad thing why are there so many successful 383's out there? Thanks in advance!

 

They make too much horse power and we all know that sux ... .. just phuchin with ya ... for real ... Do not beleive what your girl friend tells you ... bigger definately is better .. .. go for it dude.

 

well, the only real reason is itll make your wallet smaller. more cubes = more power. if your crank is okay, i say put the oney towards a good H/C and built valvetrain package and spin the SOB until 7500rpms.


and in case you are having someone else build the motor and it comes out to some rediculous price with aprts + labor, look at TSP's 370 ci motor. its cheaper than the 347 last time i checked and its got mroe cbues with the potential of going over 400 cubes if you wanna make a stroker out of it. so what im saying is if the cost parts + labor s something over 4000, look into a brand new motor.

 

Well i already have a nice set of ported heads with oversized valves, arp headstuds, and patriot gold springs. The top end is pretty much complete. I still havnt selected a cam, but will very soon.

I really only need to wrap up the bottom end. This is why im asking about the 383's. I understand more cubes = better. BUT whats the drawback?

 

You will need more funds for rear tires, you will need more funds for the drag strip, you might need plastic surgery to remove the permenant grin from your face.

There are no drawbacks other than the 4" crank costs $900+. If you plan to buy a forged 3.62" crank anyway then there is no price differance. Just get the rods and pistons designed for the 4" stroke not the 3.62" stroke.

Since you are rebuilding it would be stupid to stay at 346-347 cubes. You will need to get a bigger cam if you were not already considering one.

STROKE IT!!!!!

 

Yep already going big on the cam. I'm going to shoot patrickg a pm. I also already have a built t56, oz700 clutch, and a moser 9 inch with 4.11's. I hav all the supporting mods, just need more info before I pull the trigger on this thing.

 

Any stroke 4 inches and less on a ls engine has almost no draw backs.

4 inchs is the max i like after that i start hating on stroker motors too.

 

yeah i say go with a 383. the price range is real close so u might as well

 

Depending on the whole combo there is nothing wrong with up to a 4.125" stroke. I do not like the few 4.25" cranks though on a stock deck height motor.

 

In some combs the 4.125 is fine. but i wouldnt want one for a Road racing or a street car normal person yes but i really push my street cars. They can be run with no issues but. I just start to feel the piston speed and where the rings are. I just don't like it.

I prefer to stay at 4 inch. and believe there fine for all motors RR/street/strip

 

If you can I'd go w/ a ls2 402 or an iron block 408. Seems like there is a big difference between a 383 and a 402. It sucks to put so much into it to go back to where you were.

 

Yes, that step from the LS1 3.89" bore up to the iron 4" bore helps a hell of a lot. Or the 4.03" bore like you state for a 408 .

 

If i go ls2 or 6.0 iron, id have to track down a block. I already have my ls1 block and its free...lol.

 

You should see 470 on good stock ported heads with a 383 and see a much lower tq. curve that will get you moving. I am prolly going this way unless a bunch of Cash falls from the sky.....

Edit: Right cam to match, 90/92 and really good exhaust with about 11.1 or so CR.......Seen this combo run 10'9s all motor on a nitrous tune....

 

Im there going just ordered today from TSP Im going to have 4200 in parts and machine work and assembly. but its going to be a 383 built for a lot of boost... Just to give you idea on dinero going out the door. Thats not counting the tune.

 

i thought bore > stroke, for boost??

 

There is no drawback...who told you there were negatives about stroking an engine? More cubes = more torque = more power = more fun. It does nothing except make everything BETTER. As long as its all built properly.

.

 

I have never had a problem other than hairy palms

 

If that's really true, then child birth should be pure ecstacy, right?



Stroker, FTW!

 

Well a bigger stroke than bore. Ive heard this wasnt the best way to go. Im not sure why its bad, if someone could enlighten me.