stroker - more questions
Thread Starter
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05
stroker - more questions
I had set my mind on a new block from Summit/Jegs, but there are not too many pistons available in std bore size and I learned that forged pistons require larger clearance so the new block would have to be final machined to fit the pistons anyways.... btw, a big THANKS to forum member jackson for all the helpful info 
I found a stroker clearanced block on Ebay, 1 piece rms, 4bolt main, mech fuel pump and roller cam. honed and decked (.030" and 9.015").
The seller is "whiteperformance" - it's a machine shop / engine builder in east Tennesse, near Johnson City. They have a really nice website (whiteperformance.com) - has anybody bought from them ??
I found a stroker clearanced block on Ebay, 1 piece rms, 4bolt main, mech fuel pump and roller cam. honed and decked (.030" and 9.015").
The seller is "whiteperformance" - it's a machine shop / engine builder in east Tennesse, near Johnson City. They have a really nice website (whiteperformance.com) - has anybody bought from them ??
Thread Starter
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05
here's the "plan" :
1 piece rms block setup for roller cam and mech fuel pump, .030" over and decked to 9.010"
Eagle rotating assembly: forged crank 3.75 stroke, 5.7" H-beam rods and -16cc forged dished pistons
The pistons would be .010" in the hole, with a .035" head gasket the quench would be .045" and with -16cc dished pistons that should be close to 10:1CR --> I want to re-use my Edelbrock RPM heads (64cc) that I currently run on my 350
Cam: leaning towards Comp XR276HR12 (.503/.510" lift and 224/230 dur) LS at 112
Comments/ideas ?????
1 piece rms block setup for roller cam and mech fuel pump, .030" over and decked to 9.010"
Eagle rotating assembly: forged crank 3.75 stroke, 5.7" H-beam rods and -16cc forged dished pistons
The pistons would be .010" in the hole, with a .035" head gasket the quench would be .045" and with -16cc dished pistons that should be close to 10:1CR --> I want to re-use my Edelbrock RPM heads (64cc) that I currently run on my 350
Cam: leaning towards Comp XR276HR12 (.503/.510" lift and 224/230 dur) LS at 112
Comments/ideas ?????
Thread Starter
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05
I'll have to see if that cam would work, it's not a small base circle so it may not fit with the H-beam rods. Are I-beam rods narrower ???
Melting Slicks
Joined: Aug 2003
Posts: 2,135
Likes: 2
From: Dayton Oh
Make sure whatever block you get has not been final honed. You're machine shop will need to do the final honing with selected pistons in hand to match EATCH piston to its final cylinder. The final piston to cylinder clearances are critical and so each piston should be fitted to an individual cylinder. Hope this helps.
NCM Grand Opening Veteran
Joined: Sep 2005
Posts: 20,979
Likes: 384
From: South of giving a damn
St. Jude Donor '11, '17
I-beam or H-beam doesn't matter, it's the big end of the rod that gets clearanced for the cam. Usually you get the H-beam that are stroker clearanced since that's what's included in the forged kits. The largest selection of kits is usually in the stroker catalog anyway. If you are going this way why not ask them about a 396 kit? Doesn't cost any more for 13 extra cubes. Eagles' 396 kit clears std base circle cams, I don't have any info on the other companies products.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Just because you spot a mech fuel pump mount on block ... does NOT mean that mount is fully-functional. Verify that mount is COMPLETELY machined ... including fuel pump rod hole ... & ready to bolt on & run a mech pump. Frankly ... +$725 delivered seems a bit high ... I can do MUCH better locally. As suggested before, get a core vortec MOTOR locally & have the machinework done locally ... sell off the stuff you don't want ... keep all the bits you'll NEED to complete the roller setup. Suggest if you buy rods ... H or I ... whatever brand ... do go for 6" rods. Heck, I've got a very good used set of Manley Sportmaster 6" bushed I-beams w/ arp bolts ... 100% USA-made ... yours for $250 + ship ... email if serious.
-edit- if you've been getting steep local estimates ... shop around for local machinework
-edit- if you've been getting steep local estimates ... shop around for local machinework
Last edited by jackson; Jan 2, 2007 at 09:48 AM.
Thread Starter
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05
I was leaning towards the shorter rods so that there's more room for the ring grooves between the pin hole and the top of the piston - I know 6" rods are going to be fine but it still leaves a bad taste.... a little paranoid I guess...
A 396 rotating assembly and 6" rods would leave only 1.0625" compression height for the pistons - is my math correct ?
A piston with 1.425" compression height seems to be a lot stronger
I'll have to see how much the assembled short block is and then decide..... the shop here in Orlando wanted $700 for machining my old block
A 396 rotating assembly and 6" rods would leave only 1.0625" compression height for the pistons - is my math correct ?
A piston with 1.425" compression height seems to be a lot stronger
I'll have to see how much the assembled short block is and then decide..... the shop here in Orlando wanted $700 for machining my old block
Last edited by MYBAD79; Jan 2, 2007 at 10:33 AM. Reason: spelling
NCM Grand Opening Veteran
Joined: Sep 2005
Posts: 20,979
Likes: 384
From: South of giving a damn
St. Jude Donor '11, '17
The SRP pistons in the Eagle kit are spec'd to 1500HP. They should be strong enough. I wouldn't use hypers with 6" rods but the forged will be OK.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I was leaning towards the shorter rods so that there's more room for the ring grooves between the pin hole and the top of the piston - I know 6" rods are going to be fine but it still leaves a bad taste.... a little paranoid I guess...
A 396 rotating assembly and 6" rods would leave only 1.0625"
A 396 rotating assembly and 6" rods would leave only 1.0625"
My 1/16th inch ring JE and Wiseco rings seem to start smoking and have increased oil useage not long after 10,000 miles. My 383 when it had to be rebuilt was over 10% leak down on all cylinders at near 20,000 miles. Compared to @2-3 % when new.
These are race motor pistons made to be rebuilt all the time. Strength is not the issue. It's just motors like my 3.750 and 4.00 stroke turning 7000+ rpm makes the rings go away. My Wiseco piston was able to smash a broken off intake valve and completely destroy the chamber. all it had was some big dings in the top. It just got replaced and the motor refreshed
Thread Starter
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05
Well.... talked to the shop earlier today, the assembled short block incl. oil pump, oil pan gasket (Felpro 1 piece), double roller timing chain and cover and cam is $3000 plus shipping
machined block $600
Eagle forged rotating assembly $1750 (balanced)
oil pan gasket $50 (probably less)
timing chain set $50
oil pump $50
cam $300
lifters $130
If I am not too far off with my parts prices they're assembling for about $100
Now the camshaft selection:
crane HR2842S12IG (222/230 , .509"/.528" @.050" LS112)
comp XR276HR-12 (224/230 , .503"/.510" @.050" LS112)
machined block $600
Eagle forged rotating assembly $1750 (balanced)
oil pan gasket $50 (probably less)
timing chain set $50
oil pump $50
cam $300
lifters $130
If I am not too far off with my parts prices they're assembling for about $100
Now the camshaft selection:
crane HR2842S12IG (222/230 , .509"/.528" @.050" LS112)
comp XR276HR-12 (224/230 , .503"/.510" @.050" LS112)
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
My original 383 build used this H-rollers "119841
HR-296-2S-12 IG" cousin in the solid roller version 232/240 The only real difference is the lash take up. So the no lash gets the 234/242 numbers.
I was a real TQ monster compared to a 355 ci. It was the best all around cam I ever used in a 383. Because of the expense of roller cams choose wisely so you don't have to buy another one soon.
Roller cams run much smoother than the equivalent solid cams of the same duration.
Anyway, how can you call your 79 BAD if it's just a mild motor?
HR-296-2S-12 IG" cousin in the solid roller version 232/240 The only real difference is the lash take up. So the no lash gets the 234/242 numbers.
I was a real TQ monster compared to a 355 ci. It was the best all around cam I ever used in a 383. Because of the expense of roller cams choose wisely so you don't have to buy another one soon.
Roller cams run much smoother than the equivalent solid cams of the same duration.
Anyway, how can you call your 79 BAD if it's just a mild motor?
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Well.... talked to the shop earlier today, the assembled short block incl. oil pump, oil pan gasket (Felpro 1 piece), double roller timing chain and cover and cam is $3000 plus shipping
machined block $600
Eagle forged rotating assembly $1750 (balanced)
oil pan gasket $50 (probably less)
timing chain set $50
oil pump $50
cam $300
lifters $130
If I am not too far off with my parts prices they're assembling for about $100
Now the camshaft selection:
crane HR2842S12IG (222/230 , .509"/.528" @.050" LS112)
comp XR276HR-12 (224/230 , .503"/.510" @.050" LS112)
machined block $600
Eagle forged rotating assembly $1750 (balanced)
oil pan gasket $50 (probably less)
timing chain set $50
oil pump $50
cam $300
lifters $130
If I am not too far off with my parts prices they're assembling for about $100
Now the camshaft selection:
crane HR2842S12IG (222/230 , .509"/.528" @.050" LS112)
comp XR276HR-12 (224/230 , .503"/.510" @.050" LS112)
short block ~$3200
http://www.sdpc2000.com/catalog/514/...e-Assembly.htm
complete crate ~$3900 (buy this one & ebay its vortec heads, intake & cam)
http://www.sdpc2000.com/catalog/120/...ate-Engine.htm
Thread Starter
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05
For that kind of money ... you're already in the ballpark of brand new GMPP HT383 ...
short block ~$3200
http://www.sdpc2000.com/catalog/514/...e-Assembly.htm
complete crate ~$3900 (buy this one & ebay its vortec heads, intake & cam)
http://www.sdpc2000.com/catalog/120/...ate-Engine.htm
short block ~$3200
http://www.sdpc2000.com/catalog/514/...e-Assembly.htm
complete crate ~$3900 (buy this one & ebay its vortec heads, intake & cam)
http://www.sdpc2000.com/catalog/120/...ate-Engine.htm
It's a lot of money and I'm second guessing my plan.... might just tell them to make it a 396 so at leats I get the most cubes for the money
Thread Starter
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Frankly ... if you're not gonna shoot nitrous, no turbo, no supercharger amd not gonna race every weekend ... you don't need forged pistons ... your pocketbook. You can buy a GM crate motor at any local GM dealership. Whatever you do decide ... plan for whatever fuel it will require.