tpivette89

actually, the fastest bolton L98 Vette belongs to Vic89 over on www.corvetteforum. best E/T was 12.4 at 108mph with good air on a excellent track. never lifted a valvecover either

i have to agree with Marc about 25ths Stang... valve work doesnt qualify under the "bolton" banner

mw66nova

iTrader: (13)

what is the fastest you've heard of with stock 113's? i aqcuired a set and am currently lacking the time to get them ported...kinda wonder how they would fair in a 3300lbs. car (w/ driver) with the XE274 cam and a holley on top...

83 Crossfire TA

iTrader: (2)

It’s all a matter of definitions… if you want to compare a 5.0 to an L98, I would suggest that a fare comparison would be one with an aftermarket converter (effectively allowing the car to launch at it’s optimum RPM, same as the stick), but then the L98 would kill the 5.0 with otherwise similar stuff done to it.

You could also make a good argument for adding headers to the f-body since the stock 5.0 headers are nowhere near as bad as the aftermarket would have you believe (not good, but awesome compared to manifolds).

I personally like the comparison of an non peanut cammed LB9 + 5 speed to a 5.0 + 5 speed and even though the LB9 isn’t that popular around here the 2 are pretty even evenly equipped.

Either way, in general… both are saddled with a small diameter, long runner intake, I’m not sure that one is significantly better then the other. Both come with crappy heads (amazingly, the mustang heads are significantly crappier then the SBC heads, but are used on a larger bore for the 5.0 comparison…), OTOH, the ford came with what could be considered a more aggressive cam. The big reason that the 5.0 was a better seller and a better reputation is that as you started adding options the f-body both gained weight and price faster then the 5.0, and when it came down to it that is what ultimately made the difference.

Nic

I don't think there's much difference other than the 350 has the advantage of a longer stroke and better valve angle from the factory. That's where the aftermarket comes into play. It really just comes down to what you're willing to put into the motor to make it run the number you want it to. As far as I know, SBC's and SBF's have both been well into the 6's.

TBI92Camaro

Theres a guy locally who has a 89 Notch Mustang....5.0/5 speed. has a B cam, RPM air gap intake, 650 holley carb, full exhaust and 3.27 gears...on slicks it runs CONSISTANT 7.9's/8.0's in the 1/8th. it has more potential too as it spins the Hoosiers outta the hole. with suspension it would be a solid 7.8's car for sure.

this is on stock motor/stock untouched heads/stock FOUR CYLINDER T-5 (not the one found behind 5.0's but the 4 cylinder one!)

My car with full bolt ons, heavy *** wheels, in full tirm with NO TUNING WHATSOEVER ran consistant 8.6's with 1.78-1.82 60's yanking the drivers side tire off the ground upon launch. I had MINIMAL tire psin off the line dumping @4500 RPM....with a GOOD dyon tune, lighter wheels (fats/skinnies) and me powershifting, I saw some 8.0's easily....on STOCK E7's, untouched. with a Lunati cam (similiar to the trickFlow stage 1 cam)

IMO, dollar for dollar, the 5.0 is there....bang for the buck is more over the much more rare L98's.....thats hwy the 5.0 isp opular, it was offered in the GT's AND LX's and is rather common....the Performance motor (L98) isnt ofund as often as the crappy *** 305's that normally inhabit the F-bodies.

87TPI350KID

If you wanna beat a 5.0 in an L98 with equal mods, just run them in the 1/8, nuff said.

TBI92Camaro

why do you say that? a 5.0 has ALOT of low down torque, much like a L98.....the 5.0 HO intake design allows breathing up top much better than TPI junk.

Lets take a 91 5.0/5 speed LX vs a 91 L98 Z28.....both get 3.73 gears....who will win? the 5.0 most likely. add exhaust, who wins? Mustang. Both with good drivers, the 5.0 is the superior car, sorry.

Add a carb'd intake and it will get ALOT faster. Theres plenty of guys going to carb with say a b cam (pretty mild), exhaust and 3.73's deep into the 12's....of course on sticky tires

87_TA

Hmm,
Look at this car I just found:

1991 coupe "stock heads/cam"
-Accel base, AS&M runners, Hooker LT headers, 2500 stall converter, D44 3.33 rear
Best 1/4 mile 12.49 @ 108.66, 1.63-60'-Atco 12/03/05

Pretty strong L98 I think. And no need for a carb or steeper 3.73s - It uses the L98s great TQ to make it effecient.

Its a Vette, TA's car from vette forums.
But a very good L98 no less. (Edit)

tpivette89

looks like a Vette to me (based on D44 rear with that gear ratio). by any chance is that TA's car on www.corvetteforum.com? from what i remember, his setup was very similar

TBI92Camaro

OK lets see. thats a Vette, much lighter than a heavy *** thirdGen. then add on that it came stock with 3.33 gears...much better than 2.73 junk 5.0s came with. My car picked up 3 solid tenths in the 1/8th on a 228k mile exhaust-only car......made a TOTAL differance. I know plenty of guys with gears and exhaust well into the 13's.....can you say that for many L98 guys? and I dont mean a 13.98...I mean 13.7's, 13.5's, etc....well into the 13's, not a One hit wonder.

87_TA

My car when stock went 13.78 with only headers,flowmaster,3.73s...

The topic was not car vs car, it was 350 vs 302

As for the junk 2.73's - which alot come with 3.08's!
don't forget the T5 had the very low 3.35:1 first.

Orr89RocZ

iTrader: (20)

the vette is the same weight as the fox pretty much.. so it makes it a fair comparison

Orr89RocZ

iTrader: (20)

yeah the stock auto trans in the L98's makes it hard to do... i bet a well driven T5 L98 car with just exhaust and gears will run the same as the stang for the most part. tranny gearing makes a HUGE difference the ET's.

my car has just 2800 stall, headers and exhaust with some suspension work on stock tires and it will do high 13.8's-13.9s at 100-101mph in the good weather. this is on street tires.. 245 16's.
my trap speed is good enough for mid lower 13's if i put on some slicks and/or had better gearing. teh 1-2 shift from the 700r4 really slows things down.

a carbed 350 L98 with cam will do same as those stangs in a heavier car to boot. TPI really holds them back.
and i wouldnt be so sure about that 91z28 thing. 3.73's might be too steep for that auto but 3.42's would be perfect... i bet that is a closer race than u would think. from a dig, it could be all stang as it has better gear ratios with teh stick. from a roll, i bet the camaro pulls it if starting out in the right gears. add a converter, and the camaro can win from the dig as well. i do believe all the magazine testing comparisons have shown the L98 to be abit quicker than the 5.0's

Orr89RocZ

iTrader: (20)

i ran 8.80 at 80mph with the 3.27 gears and 8.80 at 77 with 2.77 gears with 2800 stall launch on street tires on a header exhaust only L98. thats on a 1.88-1.93 60 foot. some suspension mods like eibach prokit and adjustable tokico shocks. however that is by no means a drag setup. full interior with leather/ac/cd player.

with slicks i bet i could crack mid lower 8's at 81mph easy.

add bolt ons for power/rpm range increase and look out. hell better gears to boot? its a quick 1/8 mile car even with the 700r4 **** poor 2nd gear

89IrocZ350TPI

I wonder if my car would run quicker with a 5-speed or maybe even a 6-speed. The stock 700R doesnt seem like much to brag about. What do you guys think auto vs manual? The GT's were always and still are faster with the stick.

87_TA

Probably - but you are better getting the mustang T5 in my opinion, 3.35 1st vs 2.95 of our t5 and 2.67 of t56.
Also the T5 uses alot less power and is lighter, just not as strong.

89IrocZ350TPI

Id rather get the 6-speed if anything.

87TPI350KID

If if you love autos, TPI powerband paired witha turbo 350 is AWESOME. It just depends on if the half a second et is worth 9 mpg.

TPI is great for a street car, but if you race alot, you can't beat a carb.

IROCThe5.7L

I think it would be closer than you think. A lot of the stock 91-92 L98's ran low 14's. My buddies ran a 13.9 stock. I also don't understand what you mean by "add exhaust, who wins the mustang". Do mustangs respond better to exhaust mods? My stock L98 dropped .4 JUST with headers and a Y pipe, that is still with the stock catback pipeing.

nxgenbrozracing

one thing that would be a factor i think is parts avalibility i know thier are lots of parts for 5.0's but i think you can prolly find more for a SBC and the cost thing comes into factor its been proven over and over again that chevy parts are alot cheper than ford parts hands down.

89IrocZ350TPI

Lets take a 91 5.0/5 speed LX vs a 91 L98 Z28.....both get 3.73 gears....who will win? the 5.0 most likely. add exhaust, who wins? Mustang. Both with good drivers, the 5.0 is the superior car, sorry.
xxx

Both get 3.73's the mustang would win beacuse the tpi powerband does not like to be over geared. Anything over 3.42 for an L98 is usually overkill in the 1/4. I disagree that the 5.0 is superior in the end. A full bolt on 5.0 will usually beat an equally modded L98. I think once you start digging into the block there is more to work with a 350 than a 302. More cubes is a huge factor.

87TPI350KID

If you really want to wake up the l98, dont put the 700r4 behind it. That first gear sucks. All it does is roast the tires.

Now, if our cars would have came with carbs and made the same hp at a higher rpm, WHOLE different story, but they didnt, so we just enjoy our 0-45 badass cars.

89IrocZ350TPI

If it was carbed it may loose a little down low punch.

tpivette89

actually, stock Vette gears were 2.59s... the 3.33s were added later

87TPI350KID

Yeah, but with a redline at 5500, who cares.

EDIT: For the above posts, I think the SBC has about the same amount of aftermarket parts as the 5.0/5.8 SBF. Their prices are about the same also, but as fast as the 'bold on list goes' we dont use anywhere the same parts.

For instance, mustang guys run bigger gears, maf, cobra intake ext, whereas tpi owners love headers, porting and catback to make power. The cost part for part to make the same power is incredible, thus making the chevy guys more expensive, but if they are willing to spend the money, they all hold the same potential to be made into a serious powerhouse.

89IrocZ350TPI

Hey who ever said that the Corvette was lighter than the Camaro was wrong.

Orr89RocZ

iTrader: (20)

care to explain? i wanna know why the vette aint lighter?

89IrocZ350TPI

They were around the same weight as the Camaros both weighed around 3400 lbs in the late 80's. For some reason the Lt1 corvettes were advertised at 3503 lbs. Hmmm

1rocnz

I think that the l98 cars could smoke the 5.0s with boltons. The biggest downfall of these tpi cars was their inability to breathe. with the new runners, high flow intakes, and suck available, and with all of the other mods available, i think the camaro should take it in the end. I have a friend with bolt ons on his foxbody, running 7.8s on the bottle, 175 shot. I know that my car, once gears are in it, should be in the mid to low 8s, no bottle, with nto many mods. Alot of the tuneport guys keep running up their fuel pressure and putting bigger injectors in, without tuning the comps. This slows you down majorily, because without tuning the comp is pulsing injectors to the smaller injectors flow rate. With bigger injectors, this ruins the afr in the cars, and is like running off of 7 cylinders. If yall get your fuel right you will be impressed, and most will probably change opinions.

89IrocZ350TPI

It looks like the Ford 302 won the vote of best bolt on between the two.

87TPI350KID

The only reason the 302's have a good rep is because they were in a glorified escort that weighted 300 lbs less than a camaro. They don't hold any better bolt on ability than a chev sb. Loose 300 lbs in your maro and see whats up

89IrocZ350TPI

Thats very true for the Mustang LX cars. Those were faster than the GT's.

89IrocZ350TPI

Did those LX cars have different gears than the GT or were they just lighter? Anyone know? Both made the same power 225hp/300lb ft

83 Crossfire TA

iTrader: (2)

they were just a lot lighter, especially the notchbacks