JimiHendrix

It seems to me that the tide has risen in the horsepower arena. . . . with new Acuras coming stock with 265 hp. The 2008 vette is promising 600hp. . . .and every new sports car is in the 350hp and up range. What can I do economically to stroke my LT-1, with new heads and cam to produce max horsepower. Also,, if you can, mention what type of gears I would need for such a a beast and post any examples you might have.

Looking for a satisfying winter project as my 1996 LT-1 is going to be stripped for new paint and refinished stock rims. Currently has hot cam, 1.6 rockers, and magnaflow exhaust and performs nicely, but not up to par with current models. (although it seems to outperform C5s with a slight edge).

Thanks in advance for any submissions

Red Tornado

jimi hendrix? NEVER again will it get as good as that. he literally scared the living daylights out of every guitarist in his midst. jimi is god.


by the way, i agree with your acknowledgement of the power of today's onslaught. the C4 is woefully left behind, there are people who will argue all day long to justify otherwise, some eveen think their stock L98 is still the best thing since sliced bread although there are legions that would laugh at them otherwise, nonetheless that's inconsequential and a waste of time in engaging in those discussions.

85vet

Stroke it!!!!!! 383ci can do wonders

aklim

Gears don't give you any more HP.

I stroked mine and made 410 RWHP which translates to 500 at the crank.

VanSpeed

It is possible with a gen1/2 small block to get 500+ HP. The engine may not have the drivability, emissions, or economy of an LSX engine of similar HP but it can still be done. Here is the engine dyno graph of my combination.



414 CI small block, TPIS solid roller, Mini Ram, Dart heads, Holley commander pro 950 ECU, etc., 572 HP @ 6100RPM, 515 lb-ft @ 5400RPM on the engine dyno. The old adage of speed cost money-how fast do you want to go is very true.

Brian

steve40th

A 383/396 with good heads, Mini Ram for L-98 guys, and a mild 230-235 in and 235-240ish type hydraulic roller cam, 11-1 comp, Long Tube 1 3/4 headers, good tune and you are there.
Gear just make you accelerate quicker, which is a fun factor in itself.
Automatics most will recommend a 3.73 gear
Six Speeds most will recommend 4.10 gear

jsup

Is it NATURALLY aspirated or NORMALLY aspirated?

neat

What's the difference?

FD2BLK

500CHP or 500RWHP? 500CHP with a 383 or 396 is done fairly easy and will still have good drivability. Not big on the throw money at the problem ideology but research is your friend. Take the time do the homework and you can get some big HP out of these motors and still have a good daily driver. My combo is close to 500CHP/500CTQ and it still gets 26+MPG HWY (14-15MPG in town) idles at 850, nice cold A/C and strong brakes.

cv67

To get 500 reliable/repeatable rwhp..Can be done but it will take a ton of $ and someone extremely competent to do it. At that level your cost is premium parts, machining. Factor is another huge chunk for making it reliable; That part is what too many builders skip over and can make a car a time bomb or one that seems to outperform a similar built motor yet noone can figure out why. I wouldnt even bother with a mail order "crate motor" at that point.
You can still go fast on a budget, just be honest with how youre really going to drive the car, where you want the power and make a plan/stick with it. That will dicate if you want a 5k, 10, or 15k motor.

Red Tornado

good post ron, right on

JAKE

Here we go again. This has been kicked around before. One member wanted 500 HP and 500 ft./lbs TQ, N/A at the wheels. When I said it ain't gonna happen, some were offended. It would be nice to see a LT1 that can jump that hurdle

If you're talking at the crank, 500 HP is definitely do-able, but at the rear wheels is yet another story. Some folks are close, but no cigar though.

One problem is the LT1 is somewhat limited on how many cubes (bore) it can be made to have. Getting much more than 400 cubic inches would call for about a 4" stroke crank and fitting one would cause more clearance problems. Even then, at the wheels. I still believe it ain't happening.

Why doesn't someone just post the specs and dyno sheet of a LT1 that makes 500 HP at the rear wheels. We could all learn from that.

Do any of the big engine builders offer a LT1 making 500 HP, N/A at the wheels. 5 and 5 is a tough nut to crack.

Jake

FD2BLK

Jake,
I have seen a few 500RWHP LT1s with the F-body croud but have no idea if they had any reliability or not. One of the limmiting factors seems to be the intake at that HP range.

ScaryFast

Complements of CF member 500HP, here is a very thorough list of what you can do to achieve ~400 RWHP. You can maintain day to day driveability with the listed mods. This is for a 350, you can add a small amount of HP and significant amount of torque if you go 383 or 396.

-------------------------------------------------------------------

Corvette 350 LT1 with flattop pistons. (Stock components will work)

LT1 Alum. Heads that flow over 260cfm/intake, 190 cfm/exhaust. (Pretty easy to achieve through CNC or hand porting by a pro)

1.75" Full length headers with dual 2.5" exhaust and hi-flow mufflers.

Relatively large camshaft with at least 236 degrees of duration @ .050" and .550" to .585" lift, depending on the ported head's limit. (With no emissions and decent exhaust this can be a single pattern cam with 110 or 112 degree LSA)

52mm or larger throttle body with modified air filter assembly.

24lb to 30lb injectors, depending on who programs/tunes your PROM.

.029" headgasket to get 10.75-11.0:1 compression, depending on final combustion chamber size after head porting/milling.

MSD 6A or 'bigger' and a full-size coil for top end spark energy.

Electric waterpump and an aluminum flywheel will also help the 'bottom line'.

Comp Cams Pro Magnum Roller Rockers and measure for custom length pushrods.

http://forums.corvetteforum.com/show...5&postcount=11

JAKE

Yea, but that's 400 at the wheels, not 500. I've seen several that make 400 at the wheels. I believe 500 in torque at the wheels would be much harder.

Everytime this subject comes up guys post about others who have gotten 4xx HP. We all know that's do-able, but 500 is the target, not 4xx.

I've read lots of post saying such things as "I made 478 HP at the wheels and if I did such and such I'd make 500 easy"; none of that counts. Once engines get up to those levels,finding one or two HP becomes extremely hard to find. Make it, then talk about it.

An LSx engine may be able to make it, after lots of mods, but our L98/LTs would be hard-pressed.

Please post a link to the site that shows the LT1 'F' body making 500 HP at the wheels N/A. I'd like to see how he did it.

Jake

Jake

Zix

I'm not at 500 to the wheels yet but I should be by the end of next year. Here's the dyno sheet;



I still need to add a better exhaust system (stepped headers and merge collectors), shaft rockers (so I can rev the engine a bit higher), and a sheet metal intake. Once those are done I'd be very surprised if I wasn't at 500+ RWHP.

JAKE

Not to put too fine a point on it, but isn't that exactly what I was just talking about? If I did this or that I'd make 500, etc.

Jake

SK.LT1

I`m not sure if this helps but Golen Engines offers a 396 LT engine that is rated at 520 HP.

93cruiser

Is it possible to get the CNC program for porting? All i need is xyz coordinates and the reference coordinate. I would love to port a set of LT1 heads.

93cruiser

Zix

I realize that...all I'm saying is that it IS possible