z0vette

Hey guys,

It's a C5, 4200 stall speed convertor, converted to TH400 tranny, 3.73 rear end ratio, 26 tires.
This is suppose to be a low ten N/A project.

I have just got my re-sleaved 5.3 block with 4.185 bore from ERL and didn't start with the rotating yet due to that am going crazy on the stroke sellection. i simply Don't know what stroke will be the best for my big 4.185 bore
4.00 vs 4.100 vs 4.125

As far as I know.. Big bores and small stroke like 4.00 will give me more RPM. But it is a hydraulic set up (not sold roller) which makes the idea of revving over 7000 kinda impossible and going small stroke is kinda pointless.
On the other hand.. The 4.100 and the 4.125 strokes will give me much better low end torque but may not be very rev friendly.
Am Going crazy.. Experts/engine builders Please help! I' have posted this question everywhere but yet no answer!

Thanks and appreciate your feedback

SUTTERERMAN85

iTrader: (42)

I wouldn't go anything over 4" in a standard deck block. Too much of the piston hangs out of the bottom.

dkrowner

iTrader: (6)

not true when the block has been sleeved

dkrowner

iTrader: (6)

i'm at this same point too.but with me it's on a 4.125 bore and 3.90 - 4.00 - 4.100 - 4.125 stroke on a tt turbo'd LS2

KCS

iTrader: (20)

You can go 4.125" easily if its an NA deal. The sleeves from ERL are going to be longer, so the pistons won't hang out too far at BDC. The extra displacement will make a considerable difference all across the powerband.

z0vette

What about the RPM acceleration with the big stroke vs the small/4.00 stroke?

z0vette

True, my sleeves are longer than the stock standard block sleeves
I have no problem going 4.125 stroke, piston will still be at where it should be ;-)

racer8088

You'll now have more acceleration with the bigger stroke!

Bigger engines are faster and quicker because they accelerate faster!

squirlNUTZ

Do I dare ask why you did not let ERL build the short block for what you plan on doing?

z0vette

Lol, sure.. I have the 4.100 rotating ready and balanced, but I was kinda confused to use

z0vette

Then why all people prefer going with the 4.00 and claiming that it has more RPM! ive heard once that bigger stroke will have extra weight that will affect the RPM acceleration and wont help the motor to rev up to 7000RPM!!
btw, I was waiting for someone like you to answer this question. Expert engine builder.

If so, shall go with the 4.100 or 4.125!
For my application

squirlNUTZ

Use it then. It will be a bad *** engine. Several LSX shootout cars run that block and stroke. LMR ( I think) has a 46? + cube engine that runs seriously fast. Search ERL and that stroke and you will find several engines. Also, I would think but I'm not sure, that since you bought from ERL they will help you piece together the information you are looking for on building this beast.

squirlNUTZ

Keep in mind that you can spin the engine where ever you want with in reason of course with the proper supporting components. Most on here prefer 4.00 because of the factory block and sleaves. You having an ERL is totally different. You have the option of creating 500 cubic inches if you want. SAM's real or easy street black camaro runs one low 9'a high 8's naturally aspirated.

z0vette

Thank you man, will do. the thing is that I pay a lot of attention/tech info's and like to take builders and users opinions prior taking any step forward towards my builds
I like to have everything set right.
I Learned a lot from this forum and am still starving for more ;-)

z0vette

500cid!!!
I don't think it will be doable with a standard height deck block!
With Long deck block.. Possible

Don't forget the compression factor, I'll be running bellow 12:1 compression
Big CID's love compression And I don't think that they will perform at their best without it

squirlNUTZ

Correct, a tall deck, or as ERL it's a deck extension. If I had the cash I would be doing an ERL block and deck extension. Use the 4.100 or 4.125 and BBC rod and BOOM! Wheelies! Lol

squirlNUTZ

http://www.erlperformance.com/superd...500-cubic-inch
The ERL SUPERDECK II system takes an ordinary GM LS engine and creates a 500 Cubic Inch, 8.2 liter monster. A 4.200” bore and 4.500” stroke are obtained through the use of ductile iron sleeves, an aluminum deck plate, and extremely precise CNC machining. ERL SUPERDECK II 500CI has proven to be an extremely reliable large displacement, large stroke engine by simply following good engine design principals. The sleeves are designed with enough length to support the piston at BDC, the rings are designed to provide high performance use without sacrificing longevity, the sleeves are made of ductile iron to prevent cylinder distortion, and finally the sleeves are machined using precision equipment and careful quality control. The ERL SUPERDECK II 500CI is only available as a short block assembly. The design of the rods, camshaft, and block machining has been completed to ensure proper clearance between components. Off the shelf parts will not work. Furthermore, ERL uses only the highest quality race parts in its short block assemblies.
Copied and pasted

Compression has the same effect on 100 cubic inches or 10000

TurboBuick6

iTrader: (2)

I love RPM's so if were mine I would go with the 4" stroke you have right now and set the valve train up for 7500-7800 shifts. No you aboslutely do not need to go solid roller. I have seen Hyd rollers spin north of 8K.

Grr

iTrader: (2)

if you already have the 4.1 setup there is no reason not to use it, it will pull to 7k no problem.
put that **** together and run 9's, I doubt you will even run a 10 unless you are on the brakes with what you have for parts there

Silver408z

iTrader: (1)

Rod angle is also a factor on longer strokes. That and the factory block/sleeves is why so many people say don't go over 4"