how come the old 350 H.O. was rated at 300HP when the L05 350 TBI was rated at 200HP in trucks? was it because trucks are so heavy, the TBI, the cam, what? the heads are the same.

------------------
-Tas
'89 Formula WS-6
[soon to be Torch Red with black hood and headlights =) ]

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

Super GRK_Taz World
EFI & Intake Options
AOL IM: superGRtaz | ICQ 82881207

 

Cam and intake probably??!! not sure though

------------------
, Jon (91 RS too many mods to list)
Dale Earnhart, you have done so much, you will be missed.

 

Isn't the L05 the caprice engine used between 92-93? I don't think any vortec headed v8 engine made less than 260hp! The L05 didn't have vortec heads. Buy the L05 for the bottom end and install vortec heads and you've got a very strong build since the L05 comes with hyp. pistons and the 350ho has cast to cut the corners.

------------------
, Jon (91 RS too many mods to list)
Dale Earnhart, you have done so much, you will be missed.

 

this is a non-vortec question. They are not 50 state legal without the whole '96-'99 truck injection system on top so I don't want to talk about those.

The L05 was used in 350 Caprices with TBI and was the TBI 350 in trucks for years before the L31 '96+ Vortec 350 came around.

 

The truck L05 has a non roller cam, and 4 bolt mains. The car L05 has a roller cam and 2 bolt mains. You probably already knew that just thought I'd say it.

I don't know the specs for the old HO, are you sure the heads are the exact same ones?

I think the reasons for the lower power could be:

-lower compression ratio, 8.7 or something like that
-low end torque cam(speculation)
-restrictive manifolds

All I think of.

[This message has been edited by Keith5 (edited February 20, 2001).]

 

I did not know that. The heads are the same.

 

What was it you didn't know?

 

Tas, I think the heads were different. The LO5 got the swirl port heads for sure and I don't think the HO version had swirl ports. I read this on an old post by Vader...........bob

 

well I just emailed http://www.sdpc2000.com/ so we should know for sure by tomorrow.

 

well I still don't know if the heads are the same but there are some major differeances. check out my email:

Actually the LO5 Caprice engine is a roller cam engine, and the 300/330 HP
engine is a hydraulic flat tappet cam. The cylinder heads on the LO5 are
stock TBI heads and the cam is like the vortec truck cam. The ZZ4 cam is a
little too much for the TBI computer, but the production LT4 cam should work
good.

Jeff Maddox
806-798-4108
Tech@sdpc2000.com
www.sdpc2000.com

----- Original Message -----
From: "Tas"
To: tech@sdpc2000.com
Sent: Tuesday, February 20, 2001 11:30 PM
Subject: Old 350 H.O. vs. L05


> Since the old 300HP 350 H.O. crate engine is no longer avaliable. (the one
> without Vortec heads) I was wondering how comparable the Caprice L05 is?
> what is different? the cam? the heads? I'm planning on a 350 TBI and the
> Vortec heads don't have EGR. I'm in California. Could I get a L05 and put
a
> ZZ4 or LT4 cam in it?
> thanks
> -Tas
> '89 Firebird Formula WS.6
> 5.0L TBI auto
>


[This message has been edited by Tas (edited February 22, 2001).]

 

The heads(on the L05) are definately swirl port junk. The 350 that was in my car before the 400 was an '89 truck TBI engine. I didn't really look when I put the engine in, but when I pulled it out this past summer to make way for the 400, I looked down the intake port with my flashlight and I said,
"HOLY SH-T! Half the port is blocked off!!"
I couldn't belive what a joke those heads are. No way any engine is going to make 300 hp with those heads.

------------------
'83 Trans Am: 400 CID oil burning junkyard long block, 224/234 crane cam, Summit aluminum roller rockers, hand ported intake, home bored 2.09" (53mm) throttle bodies, MSD 454 injectors(75 lb/hr), Holley 255LPH fuel pump, custum modded FPR, Edelbrock TES headers, SLP 3" stainless steel cat back, stock ECM & chip. Borg/Warner T-5 World Class, 12" Corvette rotors and clipers, GTA 16" wheels, South Side Machine subframe connectors, 1LE sway bars, 3.45 ring and pinion, Alpine sound.
Best E.T. 13.532
Best MPH 102.24

[This message has been edited by Tom 400 CFI (edited February 22, 2001).]