Jeff F

iTrader: (1)

From a dig the technology in the C6 Z06 is brutal. I think you be surprised in a roll from 100 plus. The stock ZR-1 would not stay even, and it shouldn't as it is down 100 hp at the wheel, and the torque is a wide separation as well, but the ZR-1 would not be embarrassed.

http://www.pnwzr1.net/Jeff/accel.AVI

PNYKLR-TA

iTrader: (1)

also you comparing a car from early ninetys to mid 2000's.

take a look at the C5 Z06, those were rated at 450hp IIRC, so that would only put the ZR-1 from 91 like what 30-50hp down? i cant remember their exact hp rating stock.

Jeff F

iTrader: (1)

90-92 LT5 375
93-95 LT5 405

01 Z06 385
02-04 Z06 405

Dark Shadow

looking at yours and my neighbors it looks the same except for the fittings that we changed.

i dont think the one we have was the prototype.

somewhere in the neighborhood of 23psi

Jeff F

iTrader: (1)

These are just the three visible ques I see that signify a protoype. Get me the number stamp off the edge of the block and I can tell you more.

1. Elongated nipple for fuel pressure regulator vacuum
2. Non flat finish in casting for throttle linkage brackets
3. Cam cover with solid fitting for fresh air intake to cam cover




What did you do to secure the liners?

tylert14

iTrader: (11)

So how is the aftermarket parts market for the LT5? I allways thought it would be awesome to get my hands on one of these engines and bore/ stroke it, work the heads a little, some good valve springs, and some mean cams. Mainly worried about the crank and cams, what are out there for them, and how ungodly is the price? What is the bore spacing on these things? Close to a SBC at all? It would be awesome to retrofit them on a LTX engine. 32valve LTX dumdumdum!!!

PNYKLR-TA

iTrader: (1)

I ACTUALLY REMEMBER READING ABOUT A 32 VALVE HEAD FOR THE LT1'S I CANT REMEMBER THE NAME OF THEM RIGHT NOW . . . IM SURE SOMEONE WILL CHIME IN SOON WITH IT. ITS LIKE PHANTOM OR SOMETHING.

Jeff F

iTrader: (1)

Crank is 5k.
Cams new custom grind 3,200
Standard chevy bore spacing
Valve springs aren't needed as you max out at 470 lift.

Typical engine stroking
368 (bore only)
385 4" bore x 3.875 stroke
402 4" bore x 4" stroke
415 4" bore x 4.125 stroke

Couple of 421's and 427's out there and a 440 cube car. 440 engine will cost you around 45k.

tylert14

iTrader: (11)

Wow that's a little worse than I even thought haha. Who makes the cams and the crank? What do you mean by "Valve springs aren't needed as you max out at 470 lift"

Have you ever seen just a bare set of heads sell for them? I would love to have a set, especialy since they use SBC bore spacing.

Jeff F

iTrader: (1)

Arao or something along those lines.

I never ever heard of anybody actually getting a set up and running. Rumor was they had a set for the LS1 as well

Jeff F

iTrader: (1)

Cams are made from original GM blanks.
Couple of crank manufacturers, Sonny Bryant & Jerry Crews

The max lift you will see is 470 ish. The stock springs are fine.

I see heads every now and then and can still get them new.

Dark Shadow

your right it is a prototype. and aparently they also made more power than the retail version

Jeff F

iTrader: (1)

Figures were originally quoted as 385. Then corrected down to 375.

So what did you do to secure the liners?

redlineit

Jeff, I enjoyed your posts here and the video and those sounds are why I'd like to get an LT-5.

It looked like you were shifting around 7300 rpm?

Late to the LT-5 game (last year) and trying to learn what I need to know over on the KOTH boards. Goal is to make 500 fwhp w/stock cid.

Formula350

iTrader: (3)

There's one or two LT1 32v heads as well, and a gentleman I think even in this thread, has them.


I think he meant the max lift, as .470, due to having twin cams. not needing as much lift due to having an extra valve to do 1/2 the job of the standard, so they're smaller and less lift. I'm sure you figured that out though


There's an engine builder here in MN that's quite respectable I guess. Has quite a few LT5 packages available and range from 415hp to 600hp @ 402cid (I swore he had 427 and I though I saw a 454ci, but apparently not)
The guy is Dough Rippie and it's his name, no space and .com (not a sponsor so no linky linky!)
Pics from the engine page

redlineit

Here's a breakdown from Marc Haibeck, one of the top LT-5 builders/tuners on how to get 500 hp at the crank from a stock cid LT5.

Component Packages for a 350 Cubic Inch Engine

Upgrade '90-'92 HP '93-'95 HP

Stock engine power 375 405

Low back pressure exhaust system and performance

engine calibration (chip). +20 +10

Sub Total 400 420

Long Tube Headers +25 +25

Sub Total 420 440

Top End Porting +30 +25

Sub Total 450 465

Cylinder Head Porting +35 +20

Sub Total 485 485

Aluminum Flywheel +15 +15

Total HP 500 500


http://www.zr1specialist.com/HAT%20W...20upgrades.htm

That link also shows the power output of some of his various stroker builds.

He's got a ton of tech info at the home page.

http://www.zr1specialist.com/

Dark Shadow

well im about to post up a vid. but its pretty shitty since its from my phone again ill try and get one up from my sony.

The Batman

iTrader: (4)

hurry...i gotta go to work soon and i wanna see it

Dark Shadow

sorry for the sound quality its a cell phone. ill try to get the sony on it.

it was reved to about 2,000rpm and its running pig Rich

Formula350

iTrader: (3)

Well, it sounds like it'll be quite mean even while using the crappy capturing device!