Blown WS6

Well since I had my L98 cam laying around from my Formula's old motor I decided to slap it in my Convertible to see what happens. I mean the L98 cam has a decent profile compared to the peanut cam so all it can do is make me faster.

Well let me tell you my setup. A heavy convertible L03 with an open element and an MSD 6A box as well as free mods to start with.

Then also its a 2.73 automatic too.

Before it only pulled to 4500 rpms MAX. And that equaled about 37-40 mph in 1st gear. Now it can pull HARD to 5500 (maybe 6000 but I dont want to tax my stock 305.) Thats 50 mph in 1st gear folks. I shift at 80mph in 2nd gear and I took it to 85mph in 2nd once too. The theory that the stock TBi is a major restriction is bull. Its not the induction. Its the cam/heads/intake. This thing is WAY faster now. It ran a best of a 16.3 at 88mph bone stock. Now I'm guessing I can hit a 15.5 at 90mph. I am taking it to the track next wednesday so stay tuned for results!

Oh and I did lose a bit of low end though. Like it almost bogs off the line now. It wont start really pulling till 2000 rpm. It has more of a tendancy to burn rubber moving then from a stop. Liek if I drop it at 20-25 mph it chirps! But a higher stall Vigilante will fix the launch nicely.

------------------
Trevor Myhre
91 Firebird Formula-
Built 355 w/ ATI ProCharger P600B 12psi, 2 core intercooler.
Pro-Built Stage 3 700-R4 w/ Continental 2400 stall TC
C5 wheels and tires.

92 Firebird Convertible- TBI 305 w/ L98 cam, MSD 6A, Open Element, Free mods
700-R4
WS6 wheels and tires.

Me, my car and I
"Speed kills but it makes me feel alive" - White Zombie
Crazy street-racing idiot member of the All-Powerful Nor-Cal crew.

91Bird305

Wow thats nice improvement if it runs what u say it runs. Thats a lot of time knocked off just for a cam. Best of luck to you at the track.

------------------
Eric Natzke
91 Firebird 305 TBI
"It Ain't Stock"
http://members.aol.com/j007golden/91firebird.html
For info on certain parts or mods go to the site below
http://members.aol.com/j007golden/modeval.html

Blown WS6

Well not "just" the cam. I have some free mods and the MSD and an open element too.

Tab92bird

I've been thinking about doing that same swap into my LO3, but I haven't been able to find anyone who's done it before, so I wasn't sure if it would do anything. But if I can get it to pull to 5500 with a cam swap... . By the way, how long did it take you, and what did you have to remove besides the radiator to get clearance?

Thanks,
Brandon

Kevin91Z

iTrader: (1)

You should get it dynoed, or the track is pretty close to that. We've seen what happens when you put TPI on a stock TBI engine with my dad's car, so now we can see when you put a TPI cam in a TBI car with yours.

------------------
West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

Kwiksilverz28

Is there an aftermarket cam that is the same or close to the L98 cam. I really want to do a swap on my 305TBI but don't want to junk the whole TBI setup just yet...

[This message has been edited by Kwiksilverz28 (edited March 27, 2001).]

Blown WS6

Well it took me about 12 hours to do. Would have been quicker but I used all hand tools and I for got a harmonic balancer puller and had to go get one.

And you have to take off your A/C condensor so be prepared to lose all your freon. But I recharged mine back up.

Pablo

iTrader: (1)

you dont need to take out your ac condensor, it has rubber hoses on it you just lift it out of the way and use something to hold it up out of the way while you do your business swapping the cam. Done this and ive seen it done. No freon was released.

rsilver

WS6, Are the heads still the stock LO3 swirl ports? If so, its impressive that the cam could make nice gains without changing the heads or the intake............bob

Blown WS6

Uh Pablo. Dont assume that GM made every thirdgen throughout the years with the same stuff. Only one of my hoses were rubber/metal the other was totally metal. No rubber.

You dont know everything about these cars as you think Pablo.

Kwiksilverz28

OK, if noone wants to think of an aftermarket cam that would equal/exceed this and still work with stock TBI, where can you get a new L98 cam???

Pablo

iTrader: (1)

Is there a particular reason I seem to be recieving a ****ty attitude from you when I have given none to you? Can I expect an honest and mature answer or can I expect childishness?

Thank you for refreshing my memory however rudely about one of the hoses being metal. However, there is plenty of play in the lower metal line once you loosen the lower clamp to lift up the condensor as I said to accomplish the cam swap. Ask Jester on the carb board about it. You can say Tomato two ways. Still the same fruit.

NJ SPEEDER

i wonder what a good intake would add to your new cam. sounds like it worked out good. you gotta let us know what the results at the track are.

lata
tim

------------------
91 Camaro RS-LO3,Auto.
14.215@94.30 w/ 1.917 60'

Check Out The East Coast F-Body Nationals Home Page
www.geocities.com/njspeeder

My MAFB.ORG Home Page
www.mycar.net/mafb/registry/detail.cfm?id=299

DSI Racing Home Page
www.geocities.com/foff667

Blown WS6

Well if you can find an aftermarket cam with the same specs or near to what the L98 cam is.

.413/.428 202/207 114LSA

Or try to see if anyone with an L98 that put a new cam in has thier old cam still.

And Pablo.... remember WAY back when you blew up on me on ICQ? Well go read your history and see what you said buddy.

The ODB

I think the camshaft I run would be a great replacement for the L98 camshaft.



------------------
*I do custom performance mods on Edlebrock Performer carburetors (dualplane intake mods in the works),
White 1986 Irocz, 305 with iron #416 heads,
383 with aluminum TFS heads,
Edlebrock Performer-RPM intake and Performer #1407 carburetor, +110hp shot of crack, 700R-4 tranny, Vigilante 2400 lockup converter, 3.25:1 Ford 9" rear, Mcreary Road-Stars, SLP-stainless 1.75" shortie headers & Y-pipe, single 3" Borla exhaust, Linginfelter-TPI camshaft part number 74216 pulls 17" vacuum solid. Cam specs 213/219 @.050 114-LSA, sometimes advertised at 216/219 @.050 112-LSA .462/.470 lift @1.5:1 ratio. Using Harland Sharp 1.65:1 roller rockers. MSD-6AL, billet distributor, multi-retard, blaster-3 coil, and RPM switch. SouthSide machine subframe connectors, SSM lift-bars, Moroso 4" underdrive crank pulley.

N/A runs 10.9 @124,
Crack-runs 10.3 @135
haven't run at track since Oct-99
* vizit miy homepayge * http://www.geocities.com/trailerparkpage/

Blown WS6

Not with a stock TBI OBD. That cam is too wild.

Rock90rs

iTrader: (3)

No offence meant Trevor but i think 15.5 is a pipe dream. Id say more of 16.0-15.8
I ran a best of 15.8 with free mods and an L98 cam and Im running a car with less weight.
Let us know what it runs, Im very interested.

------------------
305 TBI
700-R4
L98 cam, 1 5/8 headers, 2 1/2 y-pipe, 4bbl edelbrock performer, holley adapter, open element K&N, afpr, flowmaster catback, MSD coil, accel wires cap & rotor, vette servos, shift kit, 2000 stall converter, TC lockup switch, 3:42rear, all the free mods and some I left out.

Blown WS6

Nah I dont think so.
I ran a 16.3 was my previous best BONE stock and I was running braket racing and I let off the gas at the very end. Either you have a slower than normal L03 or I have a faster then normal one.
I'll let you know by next wednesday.

The ODB

what are you basing this guess on? have you ever tried it, heard of anyone trying it? or even been around my car while running it?

this is the same cam I run in my 305.



------------------
*I do custom performance mods on Edlebrock Performer carburetors (dualplane intake mods in the works),
White 1986 Irocz, 305 with iron #416 heads,
383 with aluminum TFS heads,
Edlebrock Performer-RPM intake and Performer #1407 carburetor, +110hp shot of crack, 700R-4 tranny, Vigilante 2400 lockup converter, 3.25:1 Ford 9" rear, Mcreary Road-Stars, SLP-stainless 1.75" shortie headers & Y-pipe, single 3" Borla exhaust, Linginfelter-TPI camshaft part number 74216 pulls 17" vacuum solid. Cam specs 213/219 @.050 114-LSA, sometimes advertised at 216/219 @.050 112-LSA .462/.470 lift @1.5:1 ratio. Using Harland Sharp 1.65:1 roller rockers. MSD-6AL, billet distributor, multi-retard, blaster-3 coil, and RPM switch. SouthSide machine subframe connectors, SSM lift-bars, Moroso 4" underdrive crank pulley.

N/A runs 10.9 @124,
Crack-runs 10.3 @135
haven't run at track since Oct-99
* vizit miy homepayge * http://www.geocities.com/trailerparkpage/

Blown WS6

I'm basing this "guess" on my intimate knowledge of GM Speed Density EFI systems.

FastBroker

ODB's cam is NOT to wild, man, especially if it has 114 Lobe sep, but 112 is fine, too. Has pretty low intake duration numbers. U R on crack.

Yeah, new PROM would run MUCH better, though...

Blown WS6

I'm not saying it wont run. I'm saying that its beyond a stock chips capabilites and its not going to run like a cam of those numbers should make it run. Its too wild for a stock chip and the stock manifold will especially be a mismatch for it. Think about it.
OBD's cam is much better suited to a custom PROMed modified head/intake setup.

If you dont agree with me thats ok.... you're the one whos wrong.

Brent

iTrader: (1)

How did it run? Give us the story.

FastBroker

whatever. Don't race any Wrangler's in Tiburon if you ever get there...

JPrevost

Wow, I have to jump in on this thread. What's up with all the disrespect?
How did the setup work at the track? Let us now.

------------------
, Jon (350 TBI! getting 23mpg highway)
91 Red RS w/grey int, sq stereo (Alpine v12, kicker solo, MB quart premium etc)AIM: JPrevost

• Holley 670 TB unit w/ 1/2" spacer/adapter
• Edelbrock RPM vortec intake
• 350ho 330hp vortec crate motor
• 8" harm. balancer
• Stewart stage 2 water pump w/160 thermo
• SLP tri-y headers to full 3"
• Rebuilt trans w/ SLP shift kit
• Centerline 16x8's all around
• 36/24 mm sway bars
• Full poly bushings, even motor mounts
• SLP LCA and panhard
• Alston SFCs
• Edelbrock 3 point STB
• Global west steering brace aka wonderbar
• Eibach pro kit springs
• Bilstien high perf. struts and shocks
• All this and I still have AC

My websiteAny questions?

Blown WS6

Sorry for the delay! But it ran 15.7's at 88 mph. And looking at my old timeslips I was mistaken. It only ran 86mph in stock form. But I did pick up 2 mph and a half a second for basically a free mod. (since I already had the cam.)

I think my butt-dyno worked out pretty good.

NTChrist

Heeheehee! Butt dyno!
Does anybody have first person experience concerning how big of a cam to run with an L03? Including cam's that need PROM work. I'm not afraid of a PROM burner.
I'm looking longingly at a comp cam with somthing like 214/218 @ 0.05, and approx .490" lift. Would this be possible, induction/exhaust configuration aside? Is it all about the overlap?

------------------
No guts, no glory.

NTChrist

Heeheehee! Butt dyno!
Does anybody have first person experience concerning how big of a cam to run with an L03? Including cam's that need PROM work. I'm not afraid of a PROM burner.
I'm looking longingly at a comp cam with somthing like 214/218 @ 0.05, and approx .490" lift. Would this be possible, induction/exhaust configuration aside? Is it all about the overlap?

------------------
No guts, no glory.

RGZWS6

Man! I wish someone would just give a chart of what mods are the best and which mods require what.

Like this L98 cam swap. Was there any need for a custom chip? Is it tempermental without it? How does it compare to the stock LT1 or is that the LT4? I can't remember because there is so much poop in between the quality info! Some people need to pull there tampons out and stop crying about stupid s h i t! Stick to the facts please!

------------------
89 Formula 305 TBI
160* stat, 200* fan switch, K&N, Headers, 3in Flowmaster (hollow cat) back, pullies, 1.6 full roller rockers, B&M trans cooler, home-made ram-air
3.73 Richmond gears and SLP Zexel Torsen Posi (MAY 01), Wonder Bar

ShiftyCapone

iTrader: (7)

I agree, modding our cars is tough and takes a ton of opionons and charts and horror stories, and why it didn't fit speeches. I kinda wish we were ford guys because modding a mustang seems so easy. 5.0 and 4.6 and thats about it. And you look in a catalog (they have their own section in summit) and you see fits 5.0 or 4.6. thats it. You buy...you put on..nuff said. Not us and it stinks

DM91RS

RGZWS6, charts would be cool for tried and data backed mods. The specs for the LT4 cam are dur@.050 203int 210exh lift with 1.5 446int 449exh lift with 1.6 476int 480exh. The lobes are 115 which should be very TBI friendly.