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408 stroker?

This is a discussion on 408 stroker? within the Internal Engine forums, part of the LSx Technical Help Section category; Trying to find some info on this engine combo. I see a lot of people stroking the LS1 to a ...

  1. #1
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    69 nova

    408 stroker?

    Trying to find some info on this engine combo. I see a lot of people stroking the LS1 to a 408. Does anyone have or can share some details about this kind of build?

    thanx Mike

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    allllllllll black
    2002 35th z28

    i believe you need to buy a whole engine stroker kit with rods,pistons,crank and cylinder sleeves.it gets pricey and ive seen 408 shortblocks for cheap.

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    Grand Imperial Wizard Sarge's Avatar
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    Most of us went the LQ9 iron block route when building our Stroker motors.
    Just stay away from the SLP motors.....

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    Senior Member mrr23's Avatar
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    dark bowling green
    2000 corvette

    6.0L iron block from a truck. bore it to 4.030". then add 4.00 stroke crank and 6.125" rods and you have a 408 motor.

    you can get the 402 motor from scoggin dickey. uses the aluminum LS2 block.

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    Member SR71's Avatar
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    1998 Trans Am, 2007 TB SS

    How much is the 6.0L truck block, and will the new "moderately" priced ls7 parts work with it. I've been thinking about pulling the LS1 from the T/A, and I've been looking into a 402ci or 408.

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    Definitly 402 alum is the way to go.

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    Quote Originally Posted by SR71 View Post
    How much is the 6.0L truck block, and will the new "moderately" priced ls7 parts work with it. I've been thinking about pulling the LS1 from the T/A, and I've been looking into a 402ci or 408.
    Yes the LQ9 block is the truck block...same same....and yes the LS7 heads and intake will fit...

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    Ruby Red
    98 Camaro Z28 402 stroker

    Go to a 402 if you are not doing boost doing a 408 is quite a difference in price for only 15hp

    I went with the ls6 block and here are my specs: 402 C.I. Engine:,4 inch Eagle 4340 Crankshaft,6.125 Eagle 4340 Rods,Mahle 12cc Pistons,Magic Stick V.4 Cam,Lingenfelter High Performance Oil Pump,Power Force Crank Pulley,LPA Custom Ported Polished Heads,7.4” Comp Cams, Chrome Moly Pushrods,PRC Gold Dual Spring kit,MSD Blaster Coil packs,K&N FIPKII Cold Air Intake,Custom Ported and Polished Throttle Body,

    beleive it or nt my engine dynoed a 827 at the fly wheel. I think its cause of the custom heads.

  9. #9
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    Ruby Red
    98 Camaro Z28 402 stroker

    I would not care about going with the ls2 block its only 50lbs lighter then the ls6 mount your battery in the trunk and that will be the same. also if you want to run boost the iron is stronger.

  10. #10
    Grand Imperial Wizard Sarge's Avatar
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    Iron block all the way....hell...as mentioned I relocated my battery to th trunk and just about made up for the extra 72lbs of weight the iron block has over the aluminum block....and yes...the Iron Block will handle all the RWHP yyou care to throw at it....I bought my 402 Stroker spinner assembly from Henricks Motor Sports in Houston....Like $1800 bucks shipped....here is the build list...
    RWHP 512
    RWTQ 533
    GM LQ9 Iron Block
    Forged Balanced Lunati Crank Walbro 255 Fuel Pump
    Mahle Forged Pistons/Rings FAST Fuel Rails
    Lunati Forged Rods 48lb Injectors
    ARP Rod Bolts
    SLP Underdrive Pulley
    LS6 Lingenfelter Ported High Flow Oil Pump
    Clay Smith Cam 238/242, .602/.610 lift on a 114 LSA
    Patriot 243 Heads 64cc Chambers flow @ 340 cfm @.640 lift
    Patriot Gold dual valve springs .650 lift
    Titanium Retainers
    ARP Head Bolts
    Nick Williams 90mm Throttle Body
    MafLess SD Tune
    FAST 90mm Intake
    Perma-Cool Remote Dual Oil Filters
    Perma-Cool Oil Cooler

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    Member SR71's Avatar
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    Thanks guys. Looks like I'll go with the iron block 402. Trying to put money aside to save up for it right now. I should be set in a couple of months, and pull the LS1 out and drop in the 402.

  12. #12
    Grand Imperial Wizard Sarge's Avatar
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    Dont drop it on your toes man...trust me on this one...

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    Senior Member Redphoenix1998's Avatar
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    Red
    1998 Pontiac Trans Am

    I dropped a 4l80 on my knee once, wasn't pretty at all. Slipped out of the shipping container when loading it into the back of my van to take home. Tranny was fine, knee was jacked up for a couple months. Nothing broken, just hyperextended. And Yes, Iron block all the way. I was going to go all motor but I decided on a turbo setup and decided the stock cubes would be fine for me.

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    Ruby Red
    98 Camaro Z28 402 stroker

    Quote Originally Posted by Redphoenix1998 View Post
    I dropped a 4l80 on my knee once, wasn't pretty at all. Slipped out of the shipping container when loading it into the back of my van to take home. Tranny was fine, knee was jacked up for a couple months. Nothing broken, just hyperextended. And Yes, Iron block all the way. I was going to go all motor but I decided on a turbo setup and decided the stock cubes would be fine for me.
    Ouch that sucks!
    402 C.I. Engine:Magic Stick V.4 Cam,LPA Custom Ported Polished Heads,Custom Ported and Polished Throttle Body,Spec 13 Lbs. Flywheel, Centerforce Dual Friction Clutch System,Pro 5.0 Tower, 4.10s

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    Quote Originally Posted by SDMForever View Post
    Go to a 402 if you are not doing boost doing a 408 is quite a difference in price for only 15hp

    I went with the ls6 block and here are my specs: 402 C.I. Engine:,4 inch Eagle 4340 Crankshaft,6.125 Eagle 4340 Rods,Mahle 12cc Pistons,Magic Stick V.4 Cam,Lingenfelter High Performance Oil Pump,Power Force Crank Pulley,LPA Custom Ported Polished Heads,7.4 Comp Cams, Chrome Moly Pushrods,PRC Gold Dual Spring kit,MSD Blaster Coil packs,K&N FIPKII Cold Air Intake,Custom Ported and Polished Throttle Body,

    beleive it or nt my engine dynoed a 827 at the fly wheel. I think its cause of the custom heads.

  16. #16
    Grand Imperial Wizard Sarge's Avatar
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    I think he meant 527 which is close to where I'm at with damn near the exact same setup....at the flywheel...I'm right around 580'ish if I throw in a 10% drivetrain loss....

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    Ruby Red
    98 Camaro Z28 402 stroker

    im serious i forgot to add my twin garretts. sorry but with out them im at 600

  18. #18
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    Ruby Red
    98 Camaro Z28 402 stroker

    hey sled what do you have

  19. #19
    Member GA Country Boy's Avatar
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    Metallic Red
    2002 Corvette Coupe

    Quote Originally Posted by SDMForever View Post
    Go to a 402 if you are not doing boost doing a 408 is quite a difference in price for only 15hp

    I went with the ls6 block and here are my specs: 402 C.I. Engine:,4 inch Eagle 4340 Crankshaft,6.125 Eagle 4340 Rods,Mahle 12cc Pistons,Magic Stick V.4 Cam,Lingenfelter High Performance Oil Pump,Power Force Crank Pulley,LPA Custom Ported Polished Heads,7.4 Comp Cams, Chrome Moly Pushrods,PRC Gold Dual Spring kit,MSD Blaster Coil packs,K&N FIPKII Cold Air Intake,Custom Ported and Polished Throttle Body,

    beleive it or nt my engine dynoed a 827 at the fly wheel. I think its cause of the custom heads.
    Congrats! That's a really impressive number!!! You've got a winner there!
    Michael
    In GA waving from '02 C5 LS1, Z51, D1SC, 60lb injectors,RPM level 5-4L60E, 3:42, Yank 3600, QA1-12 ways, MTI long headers, high flow cats, Borlas, Wilwood, 603rwhp, 542rwtq.(DynoJet 248-C) 10.89@127.57 on street tires, Race Weight 3,640 lbs

  20. #20
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    Ruby Red
    98 Camaro Z28 402 stroker

    thanks, I was surprised all I need now is a 9 inch.

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