Looks like I spun a rod bearing on my 347. It's a shame, but now I can justify the 402/418 without a lot of guilt. I've never raced the car but wouldn't mind going to the drags someday just to see how fast it is. I'm looking more for good street performance with high torque are well as higher horsepower. The motor made 420 RWHP and 350 RWTQ after it was tuned.

Currently I've got 243 heads that were cleaned up by a local head guy, MTI R1 (232/236 .575 114) cam, Shaner Ported TB, Dynamaxx/Corsa exhaust, LS6 intake, UD pulley and a M6/4:10 combo bringing up the rear.

The 418 is about $700 more than a 402. Is it worth it?

Should I go with the L72/L96 heads/intake or keep what I have?

Will my heads/cam perform ok in the larger motor (the cam and heads only have about 1K on them)?

Last, any recommendations on a vendor for the shortblock, etc? I've got a budget of about 6K (give or take a little) for everything.

Thanks,
Bob K.

 

if you're trying to use the new l92 418ci block from TSP,i don't think your heads and intake will bolt up to it. i'm also looking into that 418ci block my self. it's so new there is not much info on the power it will make yet.

 

Mike,

I thought the LS2 heads would fit, so that would make the LS1/6 heads a bolt on also.

Can anyone verify this?

Thanks,
Bob K.

 

Yes, the LS1/2/6 heads will fit on the L92 block. With about 6K to spend, I would buy the 418 shortblock and a little bigger cam and go to town. The stock L92's will not gain you that much over the heads you have now. I think you would see a little gain but not that much overall. Save your money for when someone REPUTABLE comes out with a ported version of the l-92's and then go nuts!!! JMHO

 

I was looking to put AFR 225 heads on the new 418ci and texas speed told me they will not bolt on the new l92 block. so....will they or wont they????

 

I have no idea why they wouldn't. It has been proven that the l-92 heads will bolt on a ls-2 block, I don't know why it wouldn't work the other way??

 

i was told i could'nt even use my fast intake. i was told for the l92 418ci i would need to use the l92 heads and the new GM composet intake?? i guess i need to make some more phone calls to get some facts.

 

mizfit has a sweet l92 418 longblock with a sheetmetal manifold that would make someone a great home if he still has it.if i didn't have a 408 waiting to go in i would have probably got it myself.
*edit* it might be a 415 ci.

 

https://ls1tech.com/forums/lsx-parts-sale/592154-new-thread-414-l92-w-sheet-metal.html

 

jeeeezzzzzzzzzusssss why does everyone make things so difficult? keep and reuse what you have and save yourself the expense and headache! just go with a LS2 block, 4.030" pistons and a 4.100" crank and you will be where you want to be cubic inch wise. you will come close to 500whp with better heads over 500 and your torque should be just about the same. IMO you will have the ultimate street car, if its tuned right.

my 403 makes enough power to roll on 4th gear from 60 and smash a cam only z06 putting 407 down and im still running cast manifolds, cats and h-pipe. no dyno numbers yet. my car has never been to a 1/4 mile track, even when it was stock. it saw 4 passes in the 1/8th mile 8.2@87 was my best time. i dont know what it would run now. im extremely happy with my 403, it pulls like my sportbike. i have a '04 600RR and a '01 929RR. im pretty sure it would beat the 600RR from a roll. once i get a new clutch, cause the stocker is having trouble with the power over 6k rpms ill run a bunch of my friends that ride 600's. also i had a P1 blower on the 346 and as of right now its way faster than when i had the blower. i think big cubes is the ultimate way to go on the street, you have that throw your *** in the back of the seat feel from the torque these motors make. I have 11,250 in my build right now cause i started from scratch, i didnt have one bolt on, except the corsa cat back.

shaner is tuning my car, we are on the 10th tune right now, he just keeps overlaying a new tune and refining one after the other. i had a blower tune in the PCM, so its taking alot longer to get the crap that was in there completely reworked. the time he has spent in tuning the car has been worth it on my part, he is probably up to around 15 hours over the last 2 weeks. because of this, im pulling 37.4 mpg on the highway because his tune is so DAMN efficient. in the city im around 24-25. but yes when i hammer on it, like i did last night, drops to 18-19 mpg. the cam you have is probably just fine. just as many have stated bigger CAM isnt better.

i rode in a C5 LS2 436ci that had a 228/232 on a 114, quiet at idle, sounds stock, until he hammered 2nd gear from 20mph and i thought i was going back in time, i saw my life being flashed forward a few years, it was insane! it makes well over 500 whp and 500tq early in the rpm band. he just put a 200 wet shot on the car friday and its a supra killer now. i think that set up is killer, there is no compromise when it comes to driveability or power on tap.

 

thats not the S1 you have the S1 is a 244/244....back to topic, of course more cubes are better, but if it were me i would go with a 402 and Trick Flow heads with a nasty cam

 

l92 heads, flow great out of the box, but u have to use l92 intake, but u can buy it and have 40lb injectors, and everything, for less than u paid for your 90 setup

 

I was told that if you use L92 heads you would have to use the ne GM intake for it as well. no aftermarket intake to match those head yet

 

The SLP 402 is nice. I'm thinking of getting one myself.

 

question on this one, would i recieve the same amount of "oomph" throw back power that you speak of from the stroker ls2, or more from a drop in LS7 from say GM.?? Because i am stuck between a stroker 402/ 408 and 412 LS2, but what you say in your above paragraph is the type of power i expect and desire for the money spent...ty

 

Looks like I'm going to get a 402. Right now the question is SLP or TSP.

I'm going to use my old heads and cam.

Thanks for everyone's input.

Bob K.

 

here is something that may help you decide if you are wanting to start from scratch, sell everything your not going to reuse. which this list is 100% completel turnkey motor:

Price $12,750 delivered

LS7 427 Long Block Parts List

QTY Part Description Manufacturer Part Number
1 Block GM 17802854
2 Bell Housing Dowels GM 1453658
4 Head Dowels GM 12570326
10 Main Side Bolts GM 12556127
1 Cam Bearings Durabond CH23
1 LF Drain Plug GM 12561663
1 Dumb Bell Oil Plug GM 12573460
1 LF Oil Plug GM 9427693
3 Drain Plug GM 11588949
1 Rear Seal GM 12585671
1 Rear Seal Adapter GM 12572014
1 Rear Adapter Gasket GM 12574293
12 Rear Adapter Bolts GM 12556127
1 Main Bearings Clevite MS2199H
1 Crank Eagle 434640006100
1 Crank Key GM 12561513
1 Balancer Powerbond PBU1480SS25
1 Balancer Bolt GM 12557840
1 Connecting Rods Scat 6612521
8 Rod Bearings Clevite CB663H
1 Pistons Manley 427D14-8
1 Piston Rings Total Seal CRN06905
1 Camshaft Comp Cams 54-000-11
3 Camshaft Bolt GM 12556127
1 Camshaft Retainer GM 12556437
4 Cam Retainer Bolt GM 11515756
1 Lifters GM 12499225
4 Lifter Retainer GM 12595365
4 Lifter Retainer Bolt GM 12551163
1 Timing Set SDPC 7240
1 Timing Chain Dampner GM 12581276
1 Oil Pump SDPC SD1830
4 Oil Pump Bolt GM 11515758
1 Windage Tray GM 12558253
10 windage Tray Nut GM 11517031
1 Front Cover GM 12596023
1 Front Cover Gasket GM 12574294
8 Front Cover Bolts GM 11515758
1 Oil Pump Pickup GM 12558251
1 Oil Pump Pickup Bolt GM 11517517
1 Oil Pump Pickup Nut GM 11517031
1 Oil Pickup Seal GM 12557752
1 Oil Pan GM 12561828
1 Oil Pan Gasket GM 12558760
12 Oil Pan Bolt GM 11515758
2 Head Gaskets Cometic SDL4130-040
1 Head Bolts ARP 134-3610
2 Heads GM 12578449
16 Push Rods Manley ?
8 Rocker Arm - Intake GM 12579615
16 Rocker Arm - Exhaust GM 12579617
16 Rocker Arm Bolt GM 12560961
1 Valve Cover LH GM 12570427
1 Valve Cover RH GM 12582224
1 Valve Cover Oil Cap GM 12577268
1 Valve Cover Oil Tube GM 12559505
2 Coil Bracket GM 12580353
2 Coil Bracket Wire GM 12579355
8 Coil Bracket Bolt GM 11516424
8 Ignition Coil GM 12573190
16 Ignition Coil Mounting Bolts GM 11900243
1 Lifter Valley Cover GM 12570471
1 Intake Manifold GM 12569011
10 Intake Manifold Bolt GM 12579938
1 Fuel Rail GM 12569124
8 Fuel Injector GM 12576341
8 Fuel Injector Retainer GM 24503227
2 Air Bleed Cover GM 12602540
1 Air Bleed Pipe GM 12602548
4 Air Bleed Bolt GM 11517591
4 Stud / Intake GM 12554211
1 Bracket / Intake GM 12574634
1 Emissions Tube GM 12594779
1 Map Sensor GM 16212460
1 Throttle Body 90MM Nick Williams SD90MM
1 Cam / Knock Sensor Harness Katech SD4750

The only thing not on there is an 85MM MAF (unless you plan to go to SD) and headers.
source
http://www.z06vette.com/forums/showthread.php?t=102659

the build listed is a wet sump conversion, built by sdpc!

Now that this option is available just run the LS7 wet sump long block i have listed here. everything you need for a full turn key motor is listed. when i had my LS2 403 built in march, this option didnt exist, matter of fact it didnt exist until last month. this is what i would do NOW if i were start on a project all over again. although my '04 Z06 with the LS2403, which hasnt been on a dyno, should beat the new C6Z06.

back to the ride in the C5 LS2 436(resleeved) with a 228/232 cam, patriot stg 3, lg long tubes, corsa cat back, fast 90/90. and OMG did it have back to the future time travel seat in the paints feel. whats crazy, i was told i would most likely beat him, because my power seems to be more linear.


if you want the most cost effective way to go. go with a LS2 402-418ci motor, cause you can bolt everything you have now, right up to the new short block. save your self a ton of money. if you were close by, i would let you go rip on my car down the service road and back, you would have a smile from ear to ear just like i do now. i have drove 1200 miles in 2 weeks! i love my car more than i ever did with the P1 BLOWER. i only thought it was fast then, its a freaking jet now in comparison. night and day different. feels like a new car.

i took it out this weekend and ripped on it rolled on from 60 mph to 150mph in 4th gear and it was crazy. i raced my friend that has a cam only '01 Z06, he went from 2nd, i stayed in 4th. enough power to run him side by side and then i pulled him around 90. he knew i rolled on in a higher gear, didnt know it was 4th until i sent him a text, rolled on 4th. he was like **** you. and from 66mph punch in 3rd all the way to 114 top of 3rd now, shifted into 4th, tires broke lose again to 124. i floored the pedal and made the tires heat up to catch traction but the torque is nasty from this little 403(lol). f1 super cars with 6/32 left. they should have gripped at those speeds.

upgrading the clutch, long tubes, output shaft and diff/tranny brace then a 125 shot dry, 42# SVO injectors which flow like 47/48's. i only need 30# injectors for the motor alone. if i get beat, then you know what, ill shake hands and say you have a damn fast car!

 

I've already put in a LS7 clutch, DTE brace and hardended output shaft.

I also have 42 lb injectors.

I'm looking at SLP because they are using Callies cranks not.

Bob K>

 

What cam and heads do you have? Also, 4.10 gears?

 

^^^^ im running dart 225 heads that have been hand finished, 62cc, 225cc/80cc, flow 314@.600, they are ceramic coated as well. 5 angle valve job too. cam is a 23x/.60x 112+2 installed -6 on the cam timing sprocket, icl 116. Its a lt1dave's cam DTP stage 2, PM him for his number if you want more info. im also running his ported fast 90 and a shaner ported LS2 90 and im lucky that i live 10min from shaner, he is tuning my car as well. I seriously have 15 hours of tuning in the car and according to shaner he isnt done with the MAF parameters and called me to tell me to come back after the last data log, he says there is more room for fine tuning. it sounds like a baby cam at idle. no one believes its the size of the cam i have told them. Because of shaner's tune, im getting 35-37 mpg on the highway. 25 mpg in the city. it will go from 25 city, get on the highway, 10 miles down the road and its up over 30mpg and climbing the further i drive. 6th gear @ 66 mph, cruise control locked. car idles "stock like" at 900 rpms. the exhaust note does tell you its not a stock cam.

when i hammer the throttle, it pulls like a bull getting kicked in the *****. and sounds like a lion roaring. hahaha

'04 Z06, 3.42 gears