408 stroker?

**a69nova** · 08-23-2006, 08:45 AM

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

**unnatural aspirations** · 08-23-2006, 11:07 AM

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.

**Sarge** · 08-24-2006, 06:07 AM

Most of us went the LQ9 iron block route when building our Stroker motors.
Just stay away from the SLP motors.....

**mrr23** · 08-24-2006, 02:16 PM

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.

**SR71** · 08-25-2006, 03:21 AM

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.

**SLED28** · 09-02-2006, 03:09 PM

Definitly 402 alum is the way to go.

**Sarge** · 09-02-2006, 03:42 PM

Originally Posted by SR71

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...

**SDMForever** · 09-04-2006, 12:54 PM

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.

**SDMForever** · 09-04-2006, 12:56 PM

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.

**Sarge** · 09-05-2006, 03:00 AM

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

**SR71** · 09-05-2006, 05:30 AM

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.

**Sarge** · 09-05-2006, 06:08 AM

Dont drop it on your toes man...trust me on this one...

**Redphoenix1998** · 09-05-2006, 07:19 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.

**SDMForever** · 09-05-2006, 06:54 PM

Originally Posted by Redphoenix1998

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!

**SLED28** · 09-06-2006, 09:32 PM

Originally Posted by SDMForever

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.

**Sarge** · 09-07-2006, 03:36 AM

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....

**SDMForever** · 09-07-2006, 12:03 PM

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

**SDMForever** · 09-07-2006, 12:03 PM

hey sled what do you have

**GA Country Boy** · 09-07-2006, 04:07 PM

Originally Posted by SDMForever

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!