TCKT B8

I have a C6 with the LS2 and also have an 87 Pontiac Fiero with a Ramjet 350 in it. Both have a lot of torque and are very quick. I purchased a 65 roadster with a 300hp 327 that has a 327 350hp intake manifold and is supposed to have a 327 350hp cam. It has a stock distributor that has been converted to electronic ignition and a new Edelbrock 600 CFM carb. It runs smooth but it seems pretty sluggish (doggy) to me. Is that because I'm used to more power and torque in the Ramjet and the LS2 or should I be looking for a problem. Compression checks out and it has new AC plugs. Any ideas or suggestions.

AZDoug

If just the cam was changed, and the pistons were not, you gave up a lot of potential power.

My old 327/350 that used to be in my '61 car, with headers and an aftermarket intake manifold, would cream late '90s LS Camaros/Firebirds.

Your rear end ratio may not be optimal, either.

Doug

fredski

you may have a 308 rear end gear. if equipped with a 370 it should run strong.

fred

Bluestripe67

I think you ARE used to the torque and lite weight of the other cars. The way the distributor is set up and the timing can make a difference along with the jetting on the carb. If the car it reliable and still fun too drive, don't mess with it. You want too smoke some tires, grab one of the other two. Dennis

PS...pictures are necessary!

Nowhere Man

Is the motor tired and wore out?

capevettes

It shouldn't feel like a slug if it's running properly. I have a newer Z06, and there is no comparison, but the old car doesn't insulate you from the sensation of speed like the newer Vettes, so it still feels quick. My 65 327/350 still feels like it pulls pretty good considering the era in which it was made.

Kerrmudgeon

What RPM is that 327 turning at 60mph? That will give you the approximate rear end ratio, and THAT will tell you what the car was originally intended for, good hard pin you in the seat acceleration or lazy 80mph cruising on the freeways. The motor is only one part of the whole package.

My 66 was ordered with 3.08 highway gears. I would shift it out of second gear at 80mph if I wanted to. I switched to 4.10 ratios and it woke it up to SCARY instantly, with a couple of engine mods as well.

Frankie the Fink

ALL of the above; tired engine maybe, mis-matched parts maybe, tuning needs tweaked, too tall of a gear for hot-******* it, or, your perception is skewed by your other rides.

My lil 'ole 250hp 327ci with the 3.70 gear is no barn burner but its peppy off the line and pulls hard to the red line. Plenty fast for an old man.

fyreline

My 1962 300hp 327 pulls pretty hard - I'm fairly satisfied with it compared to my C6. The newer car is quicker, to be sure, but the '62 certainly doesn't feel like a dog.

warrenmj

Although my '66 L79 couldn't match the 2 cars you reference, I can assure you it is no slouch. The 327/350 HP matched with 3.70 gears and a Tremec 5 speed pulls hard thru all 5 gears and "sluggish" is not a word I use to describe its acceleration. Sounds like you have a problem somewhere in your '65.

Faslane

I have a 327/300 its pretty impressive for only being 300hp.
Lane

claf

I think it's all in what you're used to. When I had a Cobra replica in the garage next to my '62 Vet the Vet felt rreally SLOW. Now that the Cobra is gone the '62 feels much faster ! Bob

TCKT B8

It certainly feels like it, but it has a recent rebuild. When I stomp on the gas it does not respond very well. Doesn't sound or feel like a rear end ratio problem. If I hadn't already checked I'd say the accelerator is not hitting full throttle.

Overkill69

My 365 hp L 76 4spd 370 swc went high 13s on hard radials with enough mph to run 12s. This fall I updated the stock shortbblock with a modern flat tappet cam,alum heads and headers.
I have driven 2400 hp promods and I can tell you my 327 is ferocious/scary in a basically stock chassis.
Google 327 builds and you will find plenty of 500hp pump gas combos.
In stock trim they are high strung and demand gear ratio to do anything. Not a user friendly combo but with some thought they can run hard.
My only complaint with my build is the idle is outrageously rough.with weak vacuum. I'm hoping to smooth it out with carburetor mods.

Nowhere Man

Then you have a ignition or fuel problem you need to sort out.

Easy Rhino

The low HP versions will seem absolutely "relaxed" compared to your LS2.

Your engine may be a frankenpuff and slow. As was stated, a 300HP only partly revised to L79 or L76 specs will likely still be doggy.

The L76 and L84 are not slow, but are not LS2 fast, either. My LS2 C6 is easily faster than my '65 L76 (which is a little bit of a frankenstein itself), but the L76 is not a turd, either. The gearing helps the LS2 a ton as well. My L76 with 4:11 gears and the M21 runs out of revs over about 120 mph, but gets there quickly. It's also a lot scarier at 120 than the C6 is at 160 plus.

Should be fun sorting out your engine.

cardo0

Dude have u got that 327 on a dyno yet??? Spend a few hundred bucks and get that little mouse dialed in on A/F and timing. Driving 2 vettes tells me u have some extra $$. TKT B8 u sound like all the other couch potatoes here that just want some one to feed them regurgitated info on their cars rather than use all the new tech available now.

OK enough from me, I don't want to start a riot tonight.:-)

BADBIRDCAGE

Watch Donny Brass's videos and come back about 327's being dogs. Then put this in comparison with your C6. Two completely different worlds but close together.

To clarify: in 1967 the most you got (discounting 20 L-88's) was an advertised 435 horse power and that needed perfect tune and weather conditions. Now you get that as standard off the dealership floor. Enjoy all your cars.

fyreline

Q: Are 327's Just Slow?

A: No.

Frankie the Fink

You may very well have accelerator linkage problems - happened here before. Easy to check out with a friend depressing the gas pedal while you look down the carb and make sure the secondary plates are fully opened. Also, the lazy factory advance curve on these cars robs you of some punch. Lots of info here on dialing that in....

I run my stock 250hp car at 16* BTDC initial per Lars recommendation after he rebuilt my distributor.....woke the car up quite a bit.