347, 383, or 402 thoughts please. . .
Thread Starter
Teching In
Joined: Apr 2003
Posts: 26
Likes: 0
From: St. Louis
347, 383, or 402 thoughts please. . . Guys, I have already blown my stock 347, now it's time to get a forged mo-mo. I am leaning toward the SLP 402; however, before making the purchase, I figured it would be good to get more feedback.
I already have the 224/224 cam and a built tranny. I am going to keep the P1 ATI blower for now. I figure a forged 402 with an ATI (even if it only makes 5 psi) will be pretty trick.
I would love to get some good feedback before making the purchase.
I already have the 224/224 cam and a built tranny. I am going to keep the P1 ATI blower for now. I figure a forged 402 with an ATI (even if it only makes 5 psi) will be pretty trick.
I would love to get some good feedback before making the purchase.
i read a post of one guy with a slp 402 that is having some problems blowing smoke out the exhaust, He has some kind of blowby/ring seating failure.
A forged 347 will do just fine, with FI there really isn't a necessity to go up in cubes.
Your car made a lot of power for its mods and boost level.
A forged 347 will do just fine, with FI there really isn't a necessity to go up in cubes.
Your car made a lot of power for its mods and boost level.
Originally Posted by hogurt
Guys, I have already blown my stock 347, now it's time to get a forged mo-mo. I am leaning toward the SLP 402; however, before making the purchase, I figured it would be good to get more feedback.
I already have the 224/224 cam and a built tranny. I am going to keep the P1 ATI blower for now. I figure a forged 402 with an ATI (even if it only makes 5 psi) will be pretty trick.
I would love to get some good feedback before making the purchase.
I already have the 224/224 cam and a built tranny. I am going to keep the P1 ATI blower for now. I figure a forged 402 with an ATI (even if it only makes 5 psi) will be pretty trick.
I would love to get some good feedback before making the purchase.
I wouldn't suggest any of those options. HPE can set you up with a 408 iron block with basically any piston you want for $3899 or do a 346 for $2499. Right now HPE is building me an iron 398 with forged everything for a little over 4k. This motor is being built to withstand 1500 hp!!! The pistons and wrist pins used in my motor are similar to those used in Rick's 8 second 170mph TA on HPE's site. Here's a link to their F-body stuff:
https://www.horsepowerengineering.co...cPath=21_22_27
Erik Koenig(the machine shop manager) will talk to you and design everything to your needs. He will even explain anything that you don't understand, I've spent countless hours on the phone with him and that's part of what made me go with HPE. Also if you go with HPE i suggest asking about Probe rods as they are lighter than the Eagle's and are much easier to balance for only a few bucks more. Good luck.
Greg
Thread Starter
Teching In
Joined: Apr 2003
Posts: 26
Likes: 0
From: St. Louis
Originally Posted by Got Me SOM
i read a post of one guy with a slp 402 that is having some problems blowing smoke out the exhaust, He has some kind of blowby/ring seating failure.
A forged 347 will do just fine, with FI there really isn't a necessity to go up in cubes.
Your car made a lot of power for its mods and boost level.
A forged 347 will do just fine, with FI there really isn't a necessity to go up in cubes.
Your car made a lot of power for its mods and boost level.
Interesting.. . oops, I have to change my signature. I was running 10psi to get those numers.
I have a 370 c.i. iron block also.
Strong as hell motor for as much as a 346 if not less.
10psi on a stock bottom end. Damn man u are a lucky sume bitch. Unless it has only been wot once at that psi.
edit: What heads are u running. If they are stock u might want to look into a set of ported once while the motor is out of the car.
Strong as hell motor for as much as a 346 if not less.
10psi on a stock bottom end. Damn man u are a lucky sume bitch. Unless it has only been wot once at that psi.
edit: What heads are u running. If they are stock u might want to look into a set of ported once while the motor is out of the car.
Thread Starter
Teching In
Joined: Apr 2003
Posts: 26
Likes: 0
From: St. Louis
Originally Posted by disassembled
I wouldn't suggest any of those options. HPE can set you up with a 408 iron block with basically any piston you want for $3899 or do a 346 for $2499. Right now HPE is building me an iron 398 with forged everything for a little over 4k. This motor is being built to withstand 1500 hp!!! The pistons and wrist pins used in my motor are similar to those used in Rick's 8 second 170mph TA on HPE's site. Here's a link to their F-body stuff:
https://www.horsepowerengineering.co...cPath=21_22_27
Erik Koenig(the machine shop manager) will talk to you and design everything to your needs. He will even explain anything that you don't understand, I've spent countless hours on the phone with him and that's part of what made me go with HPE. Also if you go with HPE i suggest asking about Probe rods as they are lighter than the Eagle's and are much easier to balance for only a few bucks more. Good luck.
Greg
https://www.horsepowerengineering.co...cPath=21_22_27
Erik Koenig(the machine shop manager) will talk to you and design everything to your needs. He will even explain anything that you don't understand, I've spent countless hours on the phone with him and that's part of what made me go with HPE. Also if you go with HPE i suggest asking about Probe rods as they are lighter than the Eagle's and are much easier to balance for only a few bucks more. Good luck.
Greg
Trending Topics
Thread Starter
Teching In
Joined: Apr 2003
Posts: 26
Likes: 0
From: St. Louis
Originally Posted by goober35
I have a 370 c.i. iron block also.
Strong as hell motor for as much as a 346 if not less.
10psi on a stock bottom end. Damn man u are a lucky sume bitch. Unless it has only been wot once at that psi.
edit: What heads are u running. If they are stock u might want to look into a set of ported once while the motor is out of the car.
Strong as hell motor for as much as a 346 if not less.
10psi on a stock bottom end. Damn man u are a lucky sume bitch. Unless it has only been wot once at that psi.
edit: What heads are u running. If they are stock u might want to look into a set of ported once while the motor is out of the car.
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
ha ha ha 
Your SLP 402 doesnt even have a warrenty at all......... do a lil searching....... You dont need big cubes to make alot of HP. Im running a 370 iron block from AP Engineering... and the only reason i went iron was because when i blew my stock motor it destroyed the block and head. I dont know if HPE's short block includes all ARP fasteners or not but i know APE's does.
My short block was $4600 and that included,
a new 6.0L block,
Polished & Magnafluxed Stock Crank
Diamond Forged Ceramic Coated -15cc Dish 4.03" Pistons (Coating extra)
Diamond 4130 Chromemoly Wrist Pins
Diamond Pro Select Ring Set/ File Fit
Eagle H-Beam Connecting Rods 6.125"
L19 ARP Rod Bolts
Federal Mogul 152M Main Bearings
Clevite CB663H Connecting Rod Bearings
ARP Main Studs
ARP Head Studs
Cloyes Adjustable Timing Chain Set
JWISS Ketton C5R Timing Chain
Ported LS6 Oil Pump
Blueprinted & Fully Balanced
Camshaft
There cheap street 347 is $2899 i believe off the top of my head......
Oh and most every engine builder needes your block, crank, oil pan and front and rear cover or a Core charge is applied.
Kyle
Your SLP 402 doesnt even have a warrenty at all......... do a lil searching....... You dont need big cubes to make alot of HP. Im running a 370 iron block from AP Engineering... and the only reason i went iron was because when i blew my stock motor it destroyed the block and head. I dont know if HPE's short block includes all ARP fasteners or not but i know APE's does. My short block was $4600 and that included,
a new 6.0L block,
Polished & Magnafluxed Stock Crank
Diamond Forged Ceramic Coated -15cc Dish 4.03" Pistons (Coating extra)
Diamond 4130 Chromemoly Wrist Pins
Diamond Pro Select Ring Set/ File Fit
Eagle H-Beam Connecting Rods 6.125"
L19 ARP Rod Bolts
Federal Mogul 152M Main Bearings
Clevite CB663H Connecting Rod Bearings
ARP Main Studs
ARP Head Studs
Cloyes Adjustable Timing Chain Set
JWISS Ketton C5R Timing Chain
Ported LS6 Oil Pump
Blueprinted & Fully Balanced
Camshaft
There cheap street 347 is $2899 i believe off the top of my head......
Oh and most every engine builder needes your block, crank, oil pan and front and rear cover or a Core charge is applied.
Kyle
Originally Posted by NA$TY-TA
ha ha ha Your SLP 402 doesnt even have a warrenty at all......... do a lil searching....... You dont need big cubes to make alot of HP. Im running a 370 iron block from AP Engineering... and the only reason i went iron was because when i blew my stock motor it destroyed the block and head. I dont know if HPE's short block includes all ARP fasteners or not but i know APE's does.
My short block was $4600 and that included a new 6.0L block,
Polished & Magnafluxed Stock Crank
Diamond Forged Ceramic Coated -15cc Dish 4.03" Pistons
Diamond 4130 Chromemoly Wrist Pins
Diamond Pro Select Ring Set/ File Fit
Eagle H-Beam Connecting Rods 6.125"
L19 ARP Rod Bolts
Federal Mogul 152M Main Bearings
Clevite CB663H Connecting Rod Bearings
ARP Main Studs
ARP Head Studs
Cloyes Adjustable Timing Chain Set
JWISS Ketton C5R Timing Chain
Blueprinted & Fully Balanced
Your SLP 402 doesnt even have a warrenty at all......... do a lil searching....... You dont need big cubes to make alot of HP. Im running a 370 iron block from AP Engineering... and the only reason i went iron was because when i blew my stock motor it destroyed the block and head. I dont know if HPE's short block includes all ARP fasteners or not but i know APE's does. My short block was $4600 and that included a new 6.0L block,
Polished & Magnafluxed Stock Crank
Diamond Forged Ceramic Coated -15cc Dish 4.03" Pistons
Diamond 4130 Chromemoly Wrist Pins
Diamond Pro Select Ring Set/ File Fit
Eagle H-Beam Connecting Rods 6.125"
L19 ARP Rod Bolts
Federal Mogul 152M Main Bearings
Clevite CB663H Connecting Rod Bearings
ARP Main Studs
ARP Head Studs
Cloyes Adjustable Timing Chain Set
JWISS Ketton C5R Timing Chain
Blueprinted & Fully Balanced
Opps u got the coated pistons that did not help on the price any.
Thread Starter
Teching In
Joined: Apr 2003
Posts: 26
Likes: 0
From: St. Louis
Originally Posted by NA$TY-TA
ha ha ha Your SLP 402 doesnt even have a warrenty at all......... do a lil searching....... You dont need big cubes to make alot of HP. Im running a 370 iron block from AP Engineering... and the only reason i went iron was because when i blew my stock motor it destroyed the block and head. I dont know if HPE's short block includes all ARP fasteners or not but i know APE's does.
My short block was $4600 and that included,
a new 6.0L block,
Polished & Magnafluxed Stock Crank
Diamond Forged Ceramic Coated -15cc Dish 4.03" Pistons (Coating extra)
Diamond 4130 Chromemoly Wrist Pins
Diamond Pro Select Ring Set/ File Fit
Eagle H-Beam Connecting Rods 6.125"
L19 ARP Rod Bolts
Federal Mogul 152M Main Bearings
Clevite CB663H Connecting Rod Bearings
ARP Main Studs
ARP Head Studs
Cloyes Adjustable Timing Chain Set
JWISS Ketton C5R Timing Chain
Ported LS6 Oil Pump
Blueprinted & Fully Balanced
Camshaft
There cheap street 347 is $2899 i believe off the top of my head......
Oh and most every engine builder needes your block, crank, oil pan and front and rear cover or a Core charge is applied.
Kyle
Your SLP 402 doesnt even have a warrenty at all......... do a lil searching....... You dont need big cubes to make alot of HP. Im running a 370 iron block from AP Engineering... and the only reason i went iron was because when i blew my stock motor it destroyed the block and head. I dont know if HPE's short block includes all ARP fasteners or not but i know APE's does. My short block was $4600 and that included,
a new 6.0L block,
Polished & Magnafluxed Stock Crank
Diamond Forged Ceramic Coated -15cc Dish 4.03" Pistons (Coating extra)
Diamond 4130 Chromemoly Wrist Pins
Diamond Pro Select Ring Set/ File Fit
Eagle H-Beam Connecting Rods 6.125"
L19 ARP Rod Bolts
Federal Mogul 152M Main Bearings
Clevite CB663H Connecting Rod Bearings
ARP Main Studs
ARP Head Studs
Cloyes Adjustable Timing Chain Set
JWISS Ketton C5R Timing Chain
Ported LS6 Oil Pump
Blueprinted & Fully Balanced
Camshaft
There cheap street 347 is $2899 i believe off the top of my head......
Oh and most every engine builder needes your block, crank, oil pan and front and rear cover or a Core charge is applied.
Kyle
ZL-402 (low compression) SHORT BLOCK INCLUDES:
-Built entirely from brand-new parts.
-Sold outright—no cores required!
-GM LQ9 iron 6.0-liter block (includes block plugs)
-4.000" Eagle 4340 forged steel crankshaft, balanced to rotating assembly
-4.000" Ross heavy-duty, low-compression, 2618 forged alloy pistons with -28.50cc dish (includes new rings and full-float pins)
-402-CID displacement
-Eagle 6.125" H-beam rods
-Includes new, factory-installed cam, rod, and main bearings.
-9:1 compression ratio (nominal; ultimate compression ratio will depend upon heads and gaskets used)
-Designed for forced-induction applications
-Capable of supporting up to 700hp
-Meticulously assembled to OEM tolerances and specifications.
Originally Posted by goober35
Did they assemble the motor for you. I am a 1600 under what u have spend exsept i dont have a my Timing set figured in. I am at 3k but i did all my own work and we have just about all the same parts exsept the wrist pins i have the standered and i thing u got the tool steel ones.
Opps u got the coated pistons that did not help on the price any.
Opps u got the coated pistons that did not help on the price any.
Kyle
Originally Posted by hogurt
Their warranty won't apply to a car running boost. . .but they say it will take 1200hp?
Before you plunk 4k on something as important as a motor at least call around and talk to a bunch of shops to see which ones will talk to you and which ones won't give you the time of day.
Good luck.
Greg
Last edited by disassembled; Jan 16, 2005 at 06:14 PM.
Originally Posted by NA$TY-TA
ha ha ha Your SLP 402 doesnt even have a warrenty at all......... do a lil searching....... You dont need big cubes to make alot of HP. Im running a 370 iron block from AP Engineering... and the only reason i went iron was because when i blew my stock motor it destroyed the block and head. I dont know if HPE's short block includes all ARP fasteners or not but i know APE's does.
My short block was $4600 and that included,
a new 6.0L block,
Polished & Magnafluxed Stock Crank
Diamond Forged Ceramic Coated -15cc Dish 4.03" Pistons (Coating extra)
Diamond 4130 Chromemoly Wrist Pins
Diamond Pro Select Ring Set/ File Fit
Eagle H-Beam Connecting Rods 6.125"
L19 ARP Rod Bolts
Federal Mogul 152M Main Bearings
Clevite CB663H Connecting Rod Bearings
ARP Main Studs
ARP Head Studs
Cloyes Adjustable Timing Chain Set
JWISS Ketton C5R Timing Chain
Ported LS6 Oil Pump
Blueprinted & Fully Balanced
Camshaft
There cheap street 347 is $2899 i believe off the top of my head......
Oh and most every engine builder needes your block, crank, oil pan and front and rear cover or a Core charge is applied.
Kyle
Your SLP 402 doesnt even have a warrenty at all......... do a lil searching....... You dont need big cubes to make alot of HP. Im running a 370 iron block from AP Engineering... and the only reason i went iron was because when i blew my stock motor it destroyed the block and head. I dont know if HPE's short block includes all ARP fasteners or not but i know APE's does. My short block was $4600 and that included,
a new 6.0L block,
Polished & Magnafluxed Stock Crank
Diamond Forged Ceramic Coated -15cc Dish 4.03" Pistons (Coating extra)
Diamond 4130 Chromemoly Wrist Pins
Diamond Pro Select Ring Set/ File Fit
Eagle H-Beam Connecting Rods 6.125"
L19 ARP Rod Bolts
Federal Mogul 152M Main Bearings
Clevite CB663H Connecting Rod Bearings
ARP Main Studs
ARP Head Studs
Cloyes Adjustable Timing Chain Set
JWISS Ketton C5R Timing Chain
Ported LS6 Oil Pump
Blueprinted & Fully Balanced
Camshaft
There cheap street 347 is $2899 i believe off the top of my head......
Oh and most every engine builder needes your block, crank, oil pan and front and rear cover or a Core charge is applied.
Kyle
Greg
Thread Starter
Teching In
Joined: Apr 2003
Posts: 26
Likes: 0
From: St. Louis
BTW - I am not looking for anywhere near 1200 HP. The comments regarding warranty were merely toungue-in-cheek.
SLP, also a vendor on this forum, does not select all the parts. As far as I know, before ordering the SLP shortblock from Speed Inc, they mandate a phone conversation to make sure all the necessary parts are being ordered?
Also, the guy who had the SLP 402, found the problem and the motor appears to be running strong.
SLP, also a vendor on this forum, does not select all the parts. As far as I know, before ordering the SLP shortblock from Speed Inc, they mandate a phone conversation to make sure all the necessary parts are being ordered?
Also, the guy who had the SLP 402, found the problem and the motor appears to be running strong.
Thread Starter
Teching In
Joined: Apr 2003
Posts: 26
Likes: 0
From: St. Louis
Originally Posted by Got Me SOM
what was the problem?
I don't know the specifics. Apparently, the individual who put the motor together discovered something leaking and fixed the problem? One of the back seals or something?
Originally Posted by Got Me SOM
i read a post of one guy with a slp 402 that is having some problems blowing smoke out the exhaust, He has some kind of blowby/ring seating failure.
A forged 347 will do just fine, with FI there really isn't a necessity to go up in cubes.
Your car made a lot of power for its mods and boost level.
A forged 347 will do just fine, with FI there really isn't a necessity to go up in cubes.
Your car made a lot of power for its mods and boost level.
My 427 help me to net the 800+ RWHP. I feel that would not have been possible and still have gotten the reliablity that I got from my setup.
Originally Posted by hogurt
Guys, I have already blown my stock 347, now it's time to get a forged mo-mo. I am leaning toward the SLP 402; however, before making the purchase, I figured it would be good to get more feedback.
I already have the 224/224 cam and a built tranny. I am going to keep the P1 ATI blower for now. I figure a forged 402 with an ATI (even if it only makes 5 psi) will be pretty trick.
I would love to get some good feedback before making the purchase.
I already have the 224/224 cam and a built tranny. I am going to keep the P1 ATI blower for now. I figure a forged 402 with an ATI (even if it only makes 5 psi) will be pretty trick.
I would love to get some good feedback before making the purchase.