Yeah...most of LG's cars. LS6 stock bottom end, their ported heads, either a X2 or X3 cam, long tubes and tuning can reach 465-478 rwhp with out much work. All thru all accessories and full exhaust. I'm sure once the new LSX intake comes out this winter you will see 500 rwhp heads/cam/intake Corvette's running around.

I believe most of the other tuners can get 430-450rwhp with out to much problem. There are a couple other places that are right up there with LG as well. I wanna say...and don't quote me on this but I thought Cartek technically has the most rwhp rating right now at 486...but thats with heads/cam/headers, no muff/elec water pump/short belt......

The dyno wars with LS1s are a lot more involved that what you see over here anymore.

 

I think its mainly the heads(on top of ever other advantage they have). Most LS1 heads flow 240cfm range. Now, I know everyone likes to play cfm number games(where bigger is ALWAYS better ) but in reality....that is enough cfm to initially support around 528hp. Now thats not before any % loss, but still....thats enough to make 450+rwhp on stock heads if the setup is right.

Plus, every other part they have is better....so It all adds up I guess.

 

The LS-1's always have the upper hand on the LT-1's. They were engineered top be better engines. True even when moded it's hard to meet thier Stock ratings...but it's not impossible. As far as heads and Cams go for the LS-1's I think they get allot better result's than the ol' LT-1's do...the LS's have an unbelieveable Top end setup.... but I think the all mighty LT-1 vs. LS-1 equalizer is stroking...(not the C5-R) version either. I don't think it's really makes sense to compare the LT vs LS-1's anymore. I mean thier entirely different engines...all together like compairing the original 350's to ours.

 

as already mentioned its a combination/tuning getting those big numbers on some lt1's ......stock for stock ls1 is supreme but highly modified lt1 can match a highly modified ls1....

ls1's were blessed from the factory with a small bore stroker topped off with 15* heads it should be faster and make more power....a good combination can close the gap however...

 

You should know......

The magic as Joe has shown/proved with his setup and mine along with Quickshotkimbers is getting the right combination in the engine.

There are some good head porters lately getting their heads out in circulation, with the right cam to go with those heads we should see more and more 400+ rwhp LT1's.

GMRULZ has TEA ported LT1 heads on his setup. I think his torque was around 380.

 

disagree

you can buy a grinding tool from sears for $200 and do it yourself. i have a book on building small black chevies on a budget, and the majority of power comes porting yourself.

not that i'd ever do that, i'd probably majorly **** something up. but THEORETICLY! (sp?)

 

The real question at hand was with the periodic LT1s that pop up and have off-the-charts power (compared to other heads/cam LT1 cars).

LS1 motors are a hop skip and a jump away from 500 to the wheels, and 425-460 rwhp is becoming the norm.

I was curious why LT1 cars pushing 450 are out there (safe to say not streetable or else they'd be everywhere), but why there's this huge gap below this (I could only find a handful of threads with cars in the 380-420 range, with the majority in the 350-360 range). ...and I have a feeling that paragraph made absolutely no sense. Anyways, I think I get the picture. Time to stick a fork in this one

 

actually you'd be quite suprised how streetable some these cars are..

 

I heard that LS1 just with a few bolt on, air foil, pulley's, and CAI net 425rwhp!!!!!!

Match that LT1!!!!

Modification for modification LS1 vs LT1 there isn't much difference. Of course we have start out behing the 8 ball with our heads.

 

actually it was 419 rwhp/390ish torque, corrected was 430 rwhp,cam only stock heads on a ls1...whats shocking a lt1 guy custom ground and sold them the cam wonder who that was???....nobody can say that guy is bias

 

Your affection for a grinder will do nothing but leave you with a mediocre boat anchor.

If you knew what kind of HP he's turning at the wheels, you'd feel like a little girl right now.

 

Pick up the LT-1 Vs. LS-1 issue of GMHTP
Very interesting and sad. Most of the LT-1's on there running consitant times with the LS-1's and were modded out the ***.

but on the other note I think the LS6 speaks more of what an LS engine is about period. Some changes to the intake and heads and your at 400hp with a 5. 7L still . Not so easy for the LT's to do...but the scary factor is that even at that 400 or so HP the car still can but ported...and that's what scares me.

 

If it were easy, there would be a lot of people doing it.

Rich Krause

 

my LT4 is streetable
LS1/6 was not available when i got my car
but im happy with what i got now
the downside - over $2500 in parts and $1500 in labor to get 438 RWHP with no boost and no juice (and still pass smog)


when engine was stroked to 427 (11/2003)
438 RWHP
509 Ft. Lbs. Tq
SAE corrected
65deg. F in dynoshop

when engine was stroked to 396 (05/2001)
368 RWHP
420 Ft. Lbs. Tq.
10:1 compression

when i 1st got car (stock LT4)
306 RWHP
340 Ft. Lbs. Tq.



all motor - no boost - no juice


here is what i got:

96 Z28 w/ Full 1LE package
96 GM LT4 4-bolt block, forged crank, rods, and pistons (keithblack pistons, 11:1 compression)
stroked to 427CI (7.0L) - yes it can be done just takes $$$
LT4 PCM, LT4 Heads, LT4 Intake, HOT LT4 Cam
ported/polished/decked/flowbenched heads w/ 3-anlge valvejob (275/260cfm@.600lift)
2.02/1.65 valves
airfoil
ported TB and intake manifold
1.7:1 rollerrocker arms
LT4 HEavyduty timing set
head stud kit
main stud kit
steel sleeved cylinders
block filler (needed due to the 4.125 bore/4.0 stroke to make 427CI)
high volume/high pressure oil pump
6QT oil pan
2800RPM Stall
A4 Trans w/ Stage2 rebuild
3.42:1 rear end limited slip gears
eibach springs on all 4 corners (1/2 inch lowered)
4inch y-pipe
4inch flowmaster catback (2chamber)
relocated IAT sensor
descreened Z06 MAF
K&N FIPK
dynotuned and PCM reprogrammed via LT Edit
140db of pure bas provided by 2 700watt amps, and some subs
Alipine head unit w/ XM, and DVD/MP3 6-disk changer
160deg. stat
5core radiator
Vette C4 brakes
TB Bypass
MSD 7AL-2
MSD COIL


Thanks to the following shops for assistance with this engine

Mark De Groff's Mark Cylinder Head Service - Northridge, CA
Valley Head Service - Northridge, CA
Burbank Speed & Machine - Burbank, CA
Bob's Engine - Reseda, CA
Balance Shop - Reseda, CA
West Valley Machine Shop - Chatsworth, CA
Bob Jennings Dyno Shop - North Hills, CA
THE DYNO SHOP - SANTEE, CA
A1 Transmission - Winnetka, CA

 

500 rwhp ls1?? Never heard of it through a stock cube motor, even some strokers. Speed Inc. made 515 with a 427ci NA in a Z06. 500 is definitley stretching it.
-Mark