colincamaro

To my understanding the L98 for example is the 350 that camaros got also the same as the 350 the vettes got. With the exception that vettes have a factory header set up. I have a guy or two that just will not even begin to believe this . come on guys write me your proof so I can print it and prove them wrong...thanks...

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89 RS 305 TBI/Hooker catback-hi flow cat/3.42 gears/ To import racers;there's no replacement for displacement!

colincamaro

oh also the guys who don't believe me are old timers at my work..I need your help!

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89 RS 305 TBI/Hooker catback-hi flow cat/3.42 gears/ To import racers;there's no replacement for displacement!

92 Formula

iTrader: (2)

vette heads were aluminum, L98 F-bodies were iron heads. Hope it helps.

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1992 Pontiac Firebird Formula (original 305 TBI) The project has begun:
just purchased 1986 Corvette 350 TPI, Dual fan setup, OEM Posi, GM 3.42 gears and JEGS Ultimate Support Cover for 7.5 rear.

1997 Chevrolet Camaro SS # 379 (1 of 371 Black, T-Top, 6-speed)
1973 Chevrolet Camaro RS/Z28
1969 Chevrolet Camaro SS 350

RIP Dale Earnhardt.

colincamaro

Same size heads right.. Also the LS1 or LT1.
I forget which or both got aluminum heads in the camaro...right?

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89 RS 305 TBI/Hooker catback-hi flow cat/3.42 gears/ To import racers;there's no replacement for displacement!

91'firebrd

L-98 Vettes got aluminum heads and were setup with higher compression ratios. All the components are a little different though as far as distributor, ecm (ever heard a camaro running with a 'Vette chip?), exhaust...

92 Formula

iTrader: (2)

I can't speak for the LS1, but I know the LT1's were aluminum heads for both vette and F-body. Also, I believe both were 10.4:1 (LT1 that is).

88IROCs

Up until 1986, the two versions of TPI(Vette and f-body) were fairly similiar. Beyond that point(when the Vette went to aluminum heads) there are a lot of differences. Even the manifold bases are different(the aluminum heads don't have EGR passages, so the bases needed an EGR flange). Cam timings are also different, as well as PROM cal's.

Some times old-timers know their stuff too,...

88IROCs

btw, cast-iron L98 heads have 64cc chambers, aluminum ones have 58cc(aluminum-head motors need more compression to make the same hp as cast-iron - aluminum heads draw more heat away from the combustion space). Both have the classic 1.94/1.5 valve sizes.

Drakar

I don't know as much as the rest for L98 but LT1 and LS1 as far as I know are all alum, but have different parts depending on Vette or Camaro.

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1989 Trans Am GTA, 5.7L TPI, TH700-R4, T-Tops, dual cats, 9-bolt rear, 3.27, Dynomax muffler, K&N
1992 Camaro RS, 5.0L TBI, T-5, T-Tops, 3.08, L69 Dual Snorkel, K&N - Sold

Theme song for my GTA Cake - The Distance

u r sofa king we tah did

on the L98, differences are vettes have aluminum 58cc heads, f-bodies have iron 64cc heads. the f-body had ~10hp less than the vette.

on the LT1, the motor is identical except for how the accessories (altenator, ps pump...) bolt up, and the f-body has a way more restrictive exaust manifold (vette 300hp LT1, fbody 285hp LT1)

i have no clue on the LS1

90Form350

The Vette 98 heads are aluminum, The LT1 heads are aluminum and the LS1 heads are aluminum. They will not interchange with each other because they are all from different engine designs (Gen 1, Gen 2, Gen 3).

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1990 Pontiac Formula 350
Rebuilt 355
COMPCAMS 212/212 .440/.440 cam
Flowmasters 80 series.

colincamaro

Guess there are more differences then I thought. But It sounds like the LT1 was the most similar in vettes and z28's. BTW anyone know the HP and torque rating on the LS1 . I drove a 99 Z28 6 speed LS1 with flowmaster exhaust and headers..Let's just say it could hold it's own.

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89 RS 305 TBI/Hooker catback-hi flow cat/3.42 gears/ To import racers;there's no replacement for displacement!

92 Formula

iTrader: (2)

One other tidbit, in 1997 100 SS Camaro's had the LT4 Corvette motor.

As for the power of the LS1, I believe they were factory rated at 305. I may be wrong, but I think I'm right.

91-ZZ4-Z28

The vette L98 and LT1 motors have 4 bolt mains and the camaros have 2 bolt mains on the LS1 thay are the same other than the cam,headers,MAF,programing and the vette has a drive by wire throttle with no throttle cable.

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1991 Z28 ZZ4 with LPE superram base, SLP runners, LPE 58mm T-body,Random Technology ramair,TES headers,24#svo injectors,ZEX nitrous,Walbro 255lph f-pump,Accel AFPR,Random Technology catback,!cats,and mutch more.

91-ZZ4-Z28

From 98 to 1999 the Z28 LS1 was 305 and for 00 and 01 it is 310. The SS was rated at 325 or 335 depending on exhaust opps. and for 02 it will have a 345 opp. The vette LS1 started in 97 at 345 and is now at 350 also the vette has Z06 moddel with a modified LS1 called the LS6 that makes 405hp.

dgoodhue

All the L98 Vette have 2 bolts main just like the fbodies. Basically the L98 have a aluminum heads and different packaging changes.

I also believe the Ls1 camaro have an EGR while the Vette doesn't. The Vette has also different cam because of this.



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Dave
86 Vette Conv.

ZRATED

Also the camaro's and the firebird's with the LS1 are very under rated for their horspower.
Most of these cars shed out 300-310 rear tire smoking horses. With 20-25% dirvetrain lost......well thats make a very pretty numbers for a rustang hunter.

91-ZZ4-Z28

dgoodhue you are incorrect the vette L98 does have 4 bolt mains I now for a fact because I helped a friend of mine rebuild the motor in his 90 vette I will try to find and post the pics.

dgoodhue

I am not trying to be jerk or anything, but no L98 came from the factory with 4 bolt mains. This is a fact, you can go over to the corvette forum and ask this question or I can scan in some of my corvette magazine articles and dealer brochure from the 80's and 90's (I don't have a scanner so I have to go elsewhere). If your friend has 4 bolt mains, it is not the original block.


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Dave
86 Vette Conv.

Grumpy

Actually no, the newer head with the smaller chambers draw less heat out of the reaction. Cause they have less surface area.
The higher compresion is due to better pcm cailbrations.
The Caprices got an LT1 with iron heads.

With the smaller chambers, higher compression they can run alot less timing, and make good HP. Lots of the new calibrations have a total amount of 26-28d of timing (WOT).

colincamaro

L98 whats the HP rating in the camaro and the vette. Whats the actual hp/torque diff?

Guest

Actually no, the surface area is only about 10% different (or less) but the thermal conductivity of AL is about 3 times as much as Iron, so there is more heat drawn out of the chamber on the aluminum head still.

[This message has been edited by madmax (edited September 03, 2001).]

Grumpy

Your overlooking the actual texture of the casting. Then if they drew so much more heat out of the chamber, there would be less energy available for actually pushing the piston down, and there would be a net lose of HP, when just the opposite is true.

Also with a trace coating of carbon in the chamber, it makes an excellent thermal barrier.

Guest

And the *maybe* minor difference in texture accounts for a 300% difference? Not likely.

Last time I checked, every reputable source said aluminum heads need more static compression ratio to overcome the heat loss problem, otherwise there would be a loss of power.

What does carbon buildup have to do with this? Both of them get carbon coated, its a moot point.

[This message has been edited by madmax (edited September 03, 2001).]

91-ZZ4-Z28

dgoodhue,
No I don’t think you are being a jerk the car I had experience with rebuilding had 4 bolt mains, if it was not the original motor (I don’t' know) than I can accept that you are correct it is just that I had always thought the vette L98 did have 4bolts. I looked on the net just out of curiosity and could find nothing that said one way or the other. But you have a L98 vette so I will believe you. I hate being wrong about these things so if you do have doc. about the vette L98 I would love to see it just so I can be correct in the future.

branz28

As i do not know the LT1 very well. I know the vette ls1 had better heads/cam than the f-body.


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89 IROC-Z 350 TPI

-Flowmaster Catback
-Performance Resource Chip
-700R4 (Rebuilt) Too much done to actually list
-K&N Airfilters
-Ported Plenum
-2.77 Gears (not much to brag about but eh, its there)
-MSD 8.5 mm plug wires
-Gutted cat
-!AIR
-Gutted Air Boxes

colincamaro

So , anyone know the hp-torque diff between
f body and vette L98 LT1 LS1

88 350 tpi formula

iTrader: (9)

91-zz4-z28 this is really funny because no less than 2 weeks we droped the pan on a 89 L98 corvette and guess what 2 bolt mains. I know it was a stock eng. because the original owner comes in all the time and he was even there when we were working on it. he sold it to his friend the second owner. perhaps the the newer L98 vetts got 4 bolt mains but this one did not. also it had a little windage tray. same as the vans got. now don't go nuts and start calling every one liers but, in 89 the corvette did not have 4 bolt mains unless it was offered on a higher modle

88 350 tpi formula

iTrader: (9)

I just wan'ted to inform this is for other who like to jump in and is not intended toward 91-zz4-z28 sorry it looks like it is.

rezinn

Not to be mean, but doing a search on the internet could provide any and all of the questions you are asking.

87Irocz

91-ZZ4-Z28

I also thought that the vette L98 was a four bolt. So I called this vette performance shop I see when I go to work. They said that the vette L98 was in fact a 2 bolt. Son of a B**** oh well.

L98IROCZ89

time for my $0.02...

L98 differences: vette heads aluminum 58cc and F-Body heads 64cc iron heads. The vette has better exhaust (dual), better manifolds, better intake base and runners.

LT1 differences: just exhasut and the way the alternator, etc are mounted. Both use reverse flow cooling

LS1 differences: not sure.... the exhaust is still different as the f-body always uses a single exhaust usually with one cat and with one crossflow muffler while the vettes use dual exhaust all the way back.

The LS1 is rated at 305hp in Z28 trim and 320 in SS trim. Let it be known that these numbers are completely and total BS. Go to LS1.com and see what the guys there are seeing when they dyno their bone stock LS1 equipped F-Bodies. To make your life easier I'll just tell you that they are getting around 298hp from the stock LS1 at the rear wheels. Typical power loss through the drivetrain is 20% so you do the math to figure out what they are REALLY putting out at the crank.

Hope this helps and hasnt been repeated 100 times (i got to lazy to read through all of these replies)

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1989 Chevrolet Camaro IROC-Z
L98 - 350c.i. TPI, rebuilt 700R4 auto w/shift kit, Dual catalyst Monza PaceSetter Cat-Back, SLP 1 5/8 Coated Headers, 3.23 Posi rear, Hypertech chip with 160stat, MSD 6A, Under-Drive pulleys, AFPR, K&N's, !Air Box w/ Ram Air, moddified MAF, !TB Coolant, Spohn Dual Cat SubFrame Connectors, Alarm, Keyless entry, remote starter, 92 Z28 AeroWing, Brand New Paint (6/21/01)

Future: ZZ4 TPI w/EGR, T56, 3.42 or 3.73, Spohn strut tower brace and LCA's

1989 Chevrolet Celebrity Eurosport
2.8 MPFI, no mods
225,000 miles and still ticking!

More info and pics on my webpage:http://go.to/iroc-z

AOL IMer: GPA 0point0

colincamaro

it helps...thanks

Z28 Boy

by the way, the LS1 isn't a 350. its a 348, so there. just thought i would stir up the **** a little more.
-brian

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1991 Camaro RS - ultra blue metallic, t-tops
GMPP 350 HO crate engine - 454 TBI, MSD ignition, SLP exhaust, everything is new
700R4 - 2,400 stall converter, vette servo, shift kit
z28boy.fbody.com
z28boy@twcny.rr.com
AIM - "Z28 Boy"
1998 Pontiac Grand Prix GT - 2 door, black

88 350 tpi formula

iTrader: (9)

I was checking out an 87 in the shop to day and the exhaust was dual then became single in the center of the vette then ran dual just before the rear splitting into seperate mufflers. main advanage is strait flow less bends and the center acts as a balancing tube. also has 3 cats total. but, I think it is getting past the original question.