Vette97sc

I just planning to build forged bottom end. I get spun bearing and crank have to change also.
Now just thinking did i should make new engine with stock stroke or put 4.00" stroke crank.
I didnt find many FI 383 setups here, just thinking is there some reason why not use 4.00" crank?
I have novi2000 supercharger and i think that stroker kit would give nice torque to middle.
Other engine specs are
Dallas motorsport stage2 cam
806 heads going to ported
FIC 1000cc injectors
LT headers
Novi2000 with 3.25 pulley
8-rib system
E85 fuel
I live in Finland and LS2-LS3 shortblock would cost alot because shipping and taxes

silver408z

While the stroke would probably add some torque, it will also add a good amount of cost. The cost for the crank, the cost for additional machine work etc. A lot people make great power and torque with a 346. If it were me and staying under 800 hp, I would just keep it a 346.

Vette97sc

How much block need to grind if use 4.00" stroke crank? My brother can do that kind machine works.
If use forged crank, then price is about same if use 3.622 or 4.00" stroke crank. Scratches in stock crank is so deep and i dont think its worth to fix.
Is forged crank overkill if max hp would be 700-800?

silver408z

I could not say how much of the block would need to be machined. The stock cranks hold up at those power levels. Look around and you will see. Talk to people with more knowledge than me. If I were doing your setup I would be looking at a 346 with stock crank, forged rods and pistons.

Cutlassmaster

I talked to TSP about this and they stated that the cylinder liners on a LS1 are shorter than an LS2 and that the piston skirt does come down further out of the cylinder. So it may be fine NA but boosted they prefer not to do it. A & A said the same thing. So i opted for the LS2 stroked to a 402. Just waiting on TSP to build and ship the short block.
Chris

Vette97sc

Look like its better to keep stock stroke, just more boost and rpm
Now have to decide did i buy new gm crank or forged?
Look like gm crank cost about 450$.
K1 or Lunati abit over 800$.

Turpid porpoise

If you don't plan to go above the stock cranks max power level I would go OEM and save the money for other areas of your build.

slow ride

Id check with the machine shop to see if it can be polished out otherwise a uncut good stock crank used is $100-150. I have a 383, but only because I reused my shortblock from my NA days.

Vette97sc

How much power ls1 block can handle? I dont think crank can polished, scratches feel so deep.
I plan to go drive standing mile sometimes and track also.
Here video last summer. With new engine should get 300km/h.

MVP'S ZO6

The 4.000" stroke crank will fit in the block without any block clearancing.

There is some Internet argument that the longer 4.000" stroke will hang the piston too far out of the bottom of the cylinder causing premature wear. However; I've built enough factory block; 4.000" stroke combos to give my opinion that I believe you will be fine even with a factory block cylinder / sleeve length and a 4.000" stroke.

The factory crank will support the power you're looking for under the right circumstances. However; there is no tuner or engine builder in the world who can account for over stressed engine parts. What people get away with for engine component selection and what should be done aren't always the same.

The price on a stock stroke 3.622 and 4.000" crank are the same. With the compstar and K1 lineup of crankshafts. In my professional opinion the extra stress exerted on the crank shaft from the increased cylinder pressure of a forced induction combo and the stress exerted from the amount you have to spin most blowers to achieve your desired power levels is worth the added expense of utilizing a Forged crankshaft.

You should also consider tool steel wrist pins with your combo.

Let me know if you need help with any of this stuff.

robert miller

^^^ Great guy here on all of the info.. Mike hope you are doing good buddy.. Robert

Vette97sc

I decide to build with stock stroke. Use K1 crank, rods and Wiseco pistons. I have 806 heads and notch just welded. Next heads go to ported.
In fuel system we add second Walbro 450 pump.
Have to put pics when get parts and start to building new engine.
BLOWNBLUEZ06@RKTPerformance helping me to get parts to Finland.

Mrcho

How much is that block supposed to hold?

Vette97sc

What i read ls1 should hold 850-900hp.

John_B

sounds like the same build I am doing. I've been working with Bret and just ordered wiseco Pistons with k1 crank and rods, also adding the second 450 pump

Vette97sc

Project continue.
Block was honed with stress plate and main caps torque. Bottom end was balancing here in Finland. Big thanks to Bret who help with parts
I have really bad luck and two new Wiseco pistons was faulty and have to wait get those from warranty.
I also change ls6 valley cover and have to think how make crankcase venting. I have lingenfelter catch can.

69GTO96Z

Nice build! I just finished a stock crank forged rod/piston build, with ported 243s, ls6 intake, jam cam, and a A&A YSi setup with a 3.33" pulley. I wish the bottom end had more torque, but once it gets up to the rpm, the car really moves! I am planning to swap to a smaller pulley to see if I can get more torque earlier. If it still isnt enough, might add some nitrous to it and see what the LS6 block will take.

Vette97sc

How much boost you get with 3.33" pulley? Sure boost depend other things also, heads, balancer, cam.... I guess you should get enough power with YSI even dont use nitrous
My brother make some tools what help make building easier. Now he also make centering tools to timing cover and rear cover.
Now have 2 months time to get car running, then is first standing mile.

69GTO96Z

I am seeing right at 15 psi with the 3.33" pulley.

MVP'S ZO6

Hey Kimmo, I didn't realize this was you. I hope all is well in Finland.


I've been sort of helping bret out in the background on this one. Your two new pistons are on their way to you. Wiseco has been extremely helpful and they gave zero hasle in replacing the faulty pistons simply based on my word and the photos. We tried to just have them directly shipped from Wiseco to you but due to company policy and the particular situation they had to ship them to me here in the states first. I took them out of the box and measured the pin bosses to ensure these ones are not too big. Please accept my sincere apologies for the faulty pistons we will get you squared away. I will make a note of it to send bret the package tracking information so that you can follow your package online.


Thank you!