Ksths2

iTrader: (1)

I'm still running mid-low 10's in my LS1 C5 spraying it 150hp right from the line & works great but I'm wanting to go faster & start collecting part for a new engine for it for next year & would like some advice.

I'm looking at buying a short block thats race ready as in bolt the rest of the goodies on it, install it & go racing but trying to figure out what to get.

I've seen in person stock engine'd C6 Z06's run 9.50's w/ a Procharger at 10psi and they are LS7 427's & I'd like to be able to run that fast or a bit faster.

So i'm looking at the Mast or Scoggin Dickey's 427's or the 440ci short blocks, i'd probably run LS3/L92 heads w/ TEA porting & spraying this engine 150 first stage & another 100 on 2nd stage. but eventually would like to switch over to a F1 procharger, but down the road (2+ years)

With what i've said what do you guys think i should do?

I've heard people stay away from the 4.100 stroke if spraying or procharger but is that just a myth? And if you guys think i'm going in the wrong direction all together let me know what you think, I'm all ears

COPO9560

I would consider a dry sleeved LS2 or LS3 block over LS7 for durability. If you plan to use N2O (or Procharger) you can get by with 427 cubes and make a ton of power.

As for heads, if you go to a 4.125 inch bore you are leaving power on the table by not using a LS7 style head. While MAST LS7 heads cost more than a set of ported L92's you have much more potential and a thick deck to work from as well.

If you plan big time power in the future, wet sleeves and 6 bolt block would be the way to go. This does open up the possibility of using your current LS1 block as a core - ERL or RED have some interesting options here.

Ksths2

iTrader: (1)

I did notice that MAST has the 427ci short blocks in both the LS3 & the LS7 blocks, I'd like to stay with the aluminum block mainly for the weight I guess.

I do have a LQ4 engine i've thought about using the iron block & building my own combo but I'm in Iowa & all the auto machining around here are old school & no LS stuff is being machined or built here.

This is probably a dumb question but here goes, is the LS3 & L92 the same head/ports?

How much different is the LS7 heads? I've never thought about that idea.

Jimbo1367

YES the LS3/ L92 use the same head. The difference is L92 use solid intake valve and the LS3 uses a hallow stem valve. I would imagine they use different springs.

DietCoke

iTrader: (18)

I can appreciate MAST's offerings or SDPC, but you can't beat the bang for the buck of Texas-Speed's 427 stuff, and it WORKS.

COPO9560

The MAST 427's either use LS3 or LS7 blocks and have different bore/strokes. LS7 has larger bore and commands a little more money. Aftermarket sleeved block is stronger than either and really something to consider if you planning on boosting the engine.

LS7 port design is similar to the LS3 in shape. Ports are larger, valve angles are less and they and capable of moving more air. IMHO the best way to assemble a 427 unless you are looking for a street engine with low end torque - then L92 may be better option. As you are talking blower or N2O I assume high end power is your goal and you will make more with LS7 design.

SOMbitch

iTrader: (8)

I think you will at some point regret an LS7 block if you are going power adder. I would bet the bank if you call ERL they will steer you towards a sleeved block. The LS7 cylinders are prone to crack...

RLS!

After spending countless hours reading this board, dozens of Google searches, etc., I made the decision to go with an ERL shortblock. They set me up with a dry sleeve LS3 combo. Originally, the plan was to go with a 427ci, but decided to open up the bore a tad more and rock out to 434ci. It took a while to get the bullet, after the placing the initial order, but it was worth the wait. Everything looked great and I'm just about ready to drop it in the car.

I think you should call ERL.

Orange Juice

iTrader: (3)

You might want to give AES a call, they have experience in building some big block nitrous motors. With that kind of experience I'm sure they would lead you in the right direction.

ERL Performance

Please let me know if you have any questions. Ill give you an answer or find out an answer for you.

Ksths2

iTrader: (1)

very cool, i'll check ERL out, AES builds some bad *** stuff too! Thanks guys!

Jason 98 TA

iTrader: (4)

Thanks for the kind words DietCoke.

Just because our prices are hard to beat doesn't mean the quality isn't top notch. TSP is the only shop in the country that uses CNC block digitizing technology to prep & machine every block that ships out of our shop. Not to mention we uses the newest technology hone from Sunnen & balancer from CWT. The crazy thing is there's more money sitting in one cnc block machine @ TSP than most other machine shops have in their entire operation.

here's a link to the info on our machine shop.

http://www.texas-speed.com/t-Enginebuildinfo.aspx

http://www.youtube.com/watch?v=RIa0S...el_video_title

venom ws7

iTrader: (13)

+1 For TSP engines...

00byrd

iTrader: (14)

TSP 427 in my z06 makes great power,

Ksths2

iTrader: (1)

after talkin with Matt @ TSP they are suggesting to go with a LS2/L92 head 402 so it'll be a 4" stroke.
I guess i'm a little surprised they suggested such a small cubic inch to be able to run 9.50's....... Any suggestions?

superramvette2

iTrader: (7)

I will never buy from texas speed again. I ordered a rotating assembly and was told on purchase that it would arrive in 3-5 business days. 10 days later and there was still no tracking number despite multiple calls. I asked for a refund(I was not nice about it) and they banned my ip from accessing their site (purchased a TSP 228r cam a week before). Bad business practice. They should be honest with customers on shipping time since evidently they do not stock most of their parts.

Scoggin dickey is who I would go through. They have been great dealing with.

RONIN LSX

iTrader: (44)

If you're going to go BIG then build a MONSTER with MONSTER parts


I have an LS6 with Darton MID wet sleeves and a Callie Magnum crank.

The block is a 4.165 and cleared for the Magnum, as for the crank, it is a 4.125 stroke. This combo along with a 6.125 rod will yield you a 450 stroker. You can't get better than this!!!

Check out my thread for price and pics! Not only will you get a killed deal, you'll be helping me out BIG TIME!!!

Oh, I also have brand new Morel lifters and a brand new Cloyes Hex-a-Just timing set.


https://ls1tech.com/forums/parts-cla...l-m6-swap.html



A little Parts **** for ya to wet you appetite