MeanWS6

Ok, I have decided on the 427 motor for my car. Will be primarily used at the track with the occasional weekend road cruise. I will be spraying at least a 200 shot and moving into a TH400 trans next month.
Speed inc will most likely do the motor, so I took the specs from their site (minus the mods I already have)

From the list below, what should I upgrade or get instead of for a reliable 427 that can handle everything I throw at it? Also, what size cam?

Anything thing to add? All comments welcome!!!

-MTI Darton resleeved block
-Billet 4.00” stroke forged crank
-Billet 6.125” connecting rods
-Diamond Custom 4.125” pistons
-Diamond Pro-select rings
-High performance bearings
-All Gaskets, seals and hardware
-Custom Comp Cams Roller camshaft
-Comp Cams Lifters
-Comp Cams chrome moly pushrods
-Double roller timing chain (already have)
-SLP blueprinted oil pump (already have)
-ASP SFI approved underdrive pulley (already have)
-RGR, MTI, Patriot, or GTP stage 3 premium cylinder heads (have stage II, can they be ported into stage 3 or should I get new heads with the motor)
-GM LS6 Intake manifold (already have)
-Fully balanced/blueprinted/Finish hone w/torque plate, assembled (wtf does this mean )
-Hooker coated or SLP headers (already have SLP)
-Offroad y-pipe (already have)
-Fidanza aluminum flywheel (will get with TH400 swap)
-Taylor 409 Race wire 10.4mm LS1 Red (already have)
-NGK spark plugs (gonna need new ones anyway)
-Hypertech 160 Powestat (already have)
-SLP, Whisper or MTI Induction lid (already have)
-SLP high flow bellows
-High flow 30# Injectors (have 42.5 already)
-Everything Professionally Installed
-Fully Professionally Dynotuned

theblur98ss

iTrader: (71)

I would get differant headers. You need at least 1 7/8" on large cube motors. You may want to consider getting and LSX intake also. If you plan to spray over a 200 shot you may want to get a set of nitrous pistons. What about head and main studs? Differant rockers? Just tossing some ideas at you.

Chris@AP-Engineering

iTrader: (-2)

So far your list looks pretty good, your going down the right road. If you need any help just let me know.

Thanks,

MeanWS6

what headers and rockers would you recommend? I will ad the nitrous pistons, LSx intake, and head/main studs to the list

Ben R

If that were my car, I would go with the Kooks headers. I would probably use a 1 7/8th header with a 2" collector. The car should see significant gains, especially on the nitrous.

The only other real change I would make is that I would have Steve @ Race Engine Development sleeve my block. He is the co-inventor of the sleeves and the most qualified to install them. He's also an LS1Tech sponsor.

MeanWS6

any other input . . .thanks guys

Brian Tooley Racing

iTrader: (13)

How about TEA heads, our Stage III heads are now flowing close to 350 cfm. Can anyone else mentioned, get that? We currently do all of GMMG 427 heads, ours make more power then the others tested. It is the same basic head that Kurt Urban just made 1560 HP on his turbo engine. https://ls1tech.com/forums/forced-induction/196264-final-s-1560hp-1186ft-lbs.html
Let us know if we can help.

ROCNDAV

iTrader: (100)

As KingCrapBox stated, I would contact Steve @ Race Engine Development. I was about to go the 427 route, but time and money kept me at 396. Anyway, he spent a good part of a Sunday on the phone with me (I didnt expect a call back until Monday morning). I know my next LS1 will be a 427 and will be sleeved by Steve!

David

Bear

iTrader: (1)

DO NOT USE DIAMOND PISTONS WITH A RESLEEVED BLOCK. It tore up my bore and it was because of the pistons. This is from a MOST RELIABLE source. I have been down that road before. Listen to me........ or not, its your wallet.

Ben R

How could the pistons tear your bore up? There are plenty of people using Diamond pistons on a re-sleeved bore and none of them seem to be having any problems? Who is your 'most reliable' source?

Bear

iTrader: (1)

My SOURCE IS THE SOURCE OF SOURCES!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Diamond Pistons have some sorta skirt or something that is not good for the block. I forget what EXACTLY he said. I am now in the process of getting JE pistons after my block was ruined. MeanWS6 pm me if u want to talk to me or the source. Bear

Scalpel

iTrader: (4)

I don't understand how a piston that's used in other Darton MID blocks, that work just fine, can cause the bore to be damaged?

What exactly about the extra skirt on the Diamond pistons is causing these issues?

Not a bash or anything, just really would like to see the mechanical explanation.

Thanks man.

JoeDirt

Ben R

I think your source might be full of it. Maybe he's protecting himself and placing the blame on Diamond? Why don't you explain to everybody what happened and what you were told by your source. That way you can help others from making the same mistake you did.

theblur98ss

iTrader: (71)

I'm running diamond pistons in my resleeved ARE block. No problems yet but you definately got my attention. My motor has about 2k miles on it now.

Bear

iTrader: (1)

Once again, my source is THE source!! He didnt build my motor, BUT HAS HAS SEEN THE RESULTS!!! Use your heads and ask yourself who is THE foremost authority on Darton MID Blocks. When you figure that out you will have your answer. The only mistake I made was using JPR.

waterbug1999

iTrader: (3)

Steve Demirjian??

Ben R

First name that came to my mind.....

waterbug1999

iTrader: (3)

He is the guy that im going with when its time for my S/C 427..

Bear

iTrader: (1)

You guys said it, not me. I dont think Steve wants to **** off Diamond or anything, nothing wrong with the actual pistone per say, just that he doesnt recommend them for the Darton MID resleeved blocks. Thats all there is to it.