SinisterWS6

No sir I meant MS3, its a cam from TSP. It was the first engine I built 8 years ago LOL. Rear end gears (3.42's) killed the cam's mid range til it got wrapping up.

I averaged 17 in town and 24 on the highway. Beauty of a 6 speed. If I would of actually put heads on it, swapped pistons it would of been much more efficient fuel economy wise and made more power (obviously) LOL. Of course that all changes with the long skinny pedal.

I did build a 4" stroke LS3 based engine to replace it though, since you brought up LS3's.

Yes production LS motors come with 9.240 deck height but its different from the deck height of small block chevy's, etc where piston rock oiling issues were a problem.

I suppose I shouldn't of worded it like piston rock doesn't exist, my fault. I was tired. LOL. Its more or less, I wouldn't really worry about the oil consumption portion of it.

Rods
Yes I-Beams are lighter.But I don't personally (just my opinion) think the weight savings would be noticeable for this. I'd save my money and just go with the H-beams from Callies or K1. The rods usually weigh right around 615-650g depending on manufacturer. If you go up in rod selection to more pricey items, they are all almost usually I beam.

LY6
Yeah you would get the cast rotating assembly, but if you compare how much you would spend for a set of LS3 heads, and then the block it adds up. Unless your peeling apart a donor motor for covers and sensors for your build, you'll have to buy all those again too. But pull-out motors have all this already. You want to build a stroker anyway, so sell the stock internals (crank is worth some $), refurbish the heads. Forge it how you like, add a cam, timing chain, swap oil pans, space windage tray, etc.

I would totally understand you wanting to buy new heads and a new block. Nothing wrong with that. Just thought I'd throw that out there so you wouldn't have to source parts from different people, pay multiple shipping costs, etc. Usually cost $100-120 to ship a block, $50-60 for heads. Or $200-250 for an entire engine LOL. You'd also have an extra accessory drive, wire harness, etc to sell of for some extra cash if you wanted as well.

OR buy cheapo LQ4, sell off the whole top end and internals, save the block, covers, and misc items, forge it, and add heads/intake as you like! Be a cheaper starting option.

SinisterWS6

Also see this thread HERE

Martin chimed in on his build, he specs some really nice cams. Quite similar to what your doing. But I don't think that build is worried about being a sleeper.

ez2cdave

Interesting thread . . .

No, with 7000 Rpm and 6600-6700 rpm shift points, we are definitely not talking about a "sleeper" - LOL ! Sounds like he would have to run a 3500-4000 rpm stall converter, too. That doesn't sound like a "recipe for mpg" or "street manners" to me.

litle88

iTrader: (20)

Id recommend the Ls3 block and stroke it, with mods in my sig I laid down 545hp thru a 9" and spooled 4.11 gears!12-1 comp and a big cam, always had power everywhere. LPE heads have a very good cnc program! MArtin@Tick does spec some badazz cams and he's tested soooo many variations for the rectangular heads that he knows what works!

SinisterWS6

I meant more along the lines of his heads/block. LOL.

All you have to do is tell Martin what you want, and he'll hook you up with a good cam.

Jacktuner

From my experience square port heads for sure

ez2cdave

After thinking hard about this, I am leaning towards the Texas Speed LQ9 408 Short Block, with Lunati crank, Lunati H-Beam rods w/ARP200 bolts, and Wiseco -3cc Flat-Top pistons.

As for heads, the "standard", non-CNC ported, L92 heads should have sufficient flow. With the larger ports of the CNC'd L92 heads, I'd be worried about low velocity and sluggish response at low rpm.

Jimbo1367

LS3 stroker is my vote. The added bore will aid unshrouding the valve. This is a good read. Same heads you want to run too.

https://ls1tech.com/forums/pontiac-f...418-build.html

Here is another LS3 stroker but with CNC 243s https://ls1tech.com/forums/dynamomet...r-1x3-4-a.html

ez2cdave

That first link was very interesting ( reading the second one now ) . . . He used 4.080" pistons. I didn't know the LS3 could be bored out.

Unfortunately, that thread has me thinking again . . . LOL !

ez2cdave

Very cool, but that is "light-years" away from what I'm looking for. I'm not chasing "peak power".

The goal is a full-weight, daily-driven, street car capable of mid to high 11's ( no faster than 11.50 - no Roll Bar ) with a QUIET,closed exhaust system, just by bolting on a set of drag radials, when headed for the strip. Otherwise, on a daily basis, the car appears and "sounds" like a "stocker". I am looking at the quietest mufflers and exhaust system I can find.

ez2cdave

Maybe, I have been too worried about an all-forged rotating assembly for my application . . .

After a lot of soul-searching, I'm either looking at the 408 LQ9 Short Block (all-forged ) from Texas Speed ( I'll put L92 heads on it ) or an LS3 crate motor ( cam swap ) . . .

Who has the best prices on LS3 Crate Motors ?

Thanks !

Jason 98 TA

iTrader: (4)

Don't forget the PRC 260cc cnc aftermarket casting cylinder heads. They move 280cfm, have smaller than stock runners for big velocity, relocated valves, upgraded valve angle, etc...

Not to mention we are giving the hollow stem upgrade free on the 260s right now!!

http://www.texas-speed.com/p-4010-pr...der-heads.aspx

Jason 98 TA

iTrader: (4)

ez2cdave I think if your going to spend the money you should really consider a storker. We sell stock stroke stuff, but for just a little bit more $$$ I'd take the extra hp & big time tq from the cubes

ez2cdave

Jason,

Don't the 6-Bolt heads only fit the LSX block and not the "production" 4-Bolt blocks ?

Silver408z

iTrader: (1)

You can use 6 bolt heads on 4 bolt blocks. You just don't have a hole for the extra bolt holes in the heads. Everything else is in the same location

lil john

if u get a 402 or larger get the Rec. If you get larger size engine you could do stage 3 program also get the best head 4 your $. Compare ported L92 VS Stock TFS/TSP LS3 just about the same price after u get bare l92'. U could get block/crank/rods and bare l92 heads from me 4 1500. you could call HKE OR BRYAN and i will drop the parts there.All NEW.

rocket69GTP

hey Sinister, if you want a really well built stock LY6 block with LS3 heads, contact Rick Crawford (G8-4-Speed on here). He has stock bottom end G8's in the 10's (that's a two ton grocery getter for those keeping score) on all motor setups. He does head work, specs cams and tuning. Give him a jingle and I bet he can get you to your goals without spending an *** load of cash.

ez2cdave

Tell me some more "specifics" about the block, crank, and rods . . .

These parts and the L92 heads are all new ?

ez2cdave

Hmm . . . CNC-ported LS2 #799 Cathedral Ports at $550 per head . . .

https://sdparts.com/details/scoggin-...er/x88958765-2

OR

L92/ LS3 CNC-ported heads for $695 per head

https://sdparts.com/details/scoggin-...enter/sd5879-1

That SURE sounds better than dropping $2300 - $2700, or more, on aftermarket heads, in terms of "bang for the buck", for my application !

Dyno Junkie

Our Monaro weighs 3,880lbs and runs a cammed LS3 through a twin 2.5" exhaust.

There is more mechanical noise from the engine than there is from the exhaust.

It is quite a deceptive sleeper having run all it's times on the factory 18" wheels with drag radials.