Ferocity02

iTrader: (60)

Since no one is updating the part numbers in the sticky, here are some LS7 part numbers. This is mostly for the people who want to use LS7 heads on a sleeved LS1/6 block, like myself.


12578450 - $852.15 ea. - LS7 Head, Bare, 70cc Combustion Chamber
12569011 - $261.54 - LS7 Composite Intake Manifold
12579617 - $7.78 ea. - LS7 Exhaust Rocker 1.8:1
12579615 - $7.78 ea. - LS7 Intake Rocker, 1.8:1 Offset
12593344 - $3.43 ea. - LS7 Pushrod
12569112 - $96.52 - LS7 Fuel Rail, No Injectors
12570790 - $214.20 - LS2/7 Throttle Body, 90mm Single Bore
12591644 - $57.81 ea. - LS7 Intake Valve, 2.20" Titanium
12578455 - $27.52 ea. - LS7 Exhaust Valve, 1.61" Sodium Filled Stem
12578457 - $4.83 ea. - LS7 Valve Spring
12596509 - $5.93 ea? - LS7 Intake Valve Lash Cap


Need Part Numbers/Prices For:
Valve Spring Retainers
Valve Spring Locks
Head Bolts
Head Gaskets
Valve Covers


Some Pics...

half-n-half

iTrader: (7)

do we know if ls7 heads will bolt to an ls1 block..?

that may be quite an upgrade if all that u have to buy is the 270 intake...

Ferocity02

iTrader: (60)

I believe that they bolt to an LS1 block, but not with the stock bore. I think 4.000" bore is the minimum for LS7 heads, maybe 4.100". There are a ton of other parts that are needed to make the heads work, so they aren't direct replacements.

Greg Fell

iTrader: (9)

You need at least a 4.060, LS7 intake, and LS7 rockers. The LS7 intake valve is huge, so massive springs or Ti valves are needed.

jerflash

so you can get an iron 6.0 block and bore it out to 4.060 and these heads will fit and work nice?

Greg Fell

iTrader: (9)

I am not 100% sure they work on a 4.060...but I've heard they will. So, yes.

badaSS346

iTrader: (4)

Why doesnt anyone want to use the LS7 block instead of resleeving an LS1? Can you just get the cam and knock sensor adaptors and put a LS1 stroked crank? Then you get a factory sleeved block.

P/N for the block if anyone has it?

jerflash

if you at my ls7 block thread i asked that question

i wana use the ls7 block just wondering what will work and what wont

Spinmonster

I've been asking for that block since it was created. Its not available yet.

Ferocity02

iTrader: (60)

I think the problem with using the LS7 block is that you are going to need so many other LS7 parts like the oil pan, windage tray, oil pump system, front and rear covers, valley cover, main caps, etc... Which may make it cheaper to buy a sleeved LS1/6 block and be able to use most the LS1 parts. I am curious to see if LS1/6 cranks and cams with work in an LS7 block.

badaSS346

iTrader: (4)

Not to sound ignorant, but why would we need to use those? I understand why we have to use the valley cover, not a big deal. Why cant you slap on an ls2 oil pump? The pan shouldnt matter as long as the oil system converts.

Spinmonster

Judging from the pictures that appeared in Chevy Power magazine, the block has all the mounting holes for the LS2 oil pump and the oil pan from the LS2 will bolt up. The valley cover also would, even though there are several cylindrical posts under it. What is the issue anyway even if you had to use the stock valley cover. The LS2 cover is 48 bucks so the LS7 wont require a mortgage.

The use of the dry sump system isn't mandatory but even if it was along with the valley cover and timing cover, it is still a lot cheaper than 1300 for sleeves and 1000 to get them installed. This block will be used extensively for cheap (5k) strokers like the ls2 402. All the parts mentioned above (front and rear covers-don't know why you think these wont fit even with a different crank it makes no sense to think these dimensions would change in production raising the costs for these covers, oil pump, valley cover, windange tray, pickup tube) are not going to exceed 2300 bucks.

I don't think this block is anywhere as strong as a darton re-sleeve.

Ferocity02

iTrader: (60)

The point is that using an LS7 block will require you to buy LS2/7 parts that you wouldn't otherwise have to buy if you are using parts of your old LS1/6 engine on a sleeved LS1/6 block.

Ferocity02

iTrader: (60)

A few more parts and info added. Still looking for more part numbers! Thanks

Greg Fell

iTrader: (9)

Dont forget the lash caps

Ferocity02

iTrader: (60)

I need more info on those. What are they anyways?

Greg Fell

iTrader: (9)

Part number 12596509
https://ls1tech.com/forums/generation-iv-internal-engine/402774-lash-pads-ls7-valvetrain.html
They go on the tips of the intakes, as they are not hardened. They reduce wear and provide good surface area for the rockers.

Builder

The valley cover part number is 12570471. This may include the gasket and bolts. It's on the way and I will edit this post.

Ferocity02

iTrader: (60)

I don't think the LS7 valley cover is needed for an LS7 head/intake swap onto a sleeved LS1/6 block. Someone correct me if I'm wrong.

SLED28

iTrader: (7)

What are the LS7 rocker bolts part number?