4:10 diff in 2L GTV - Alfa Romeo Bulletin Board & Forums
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post #1 of 35 (permalink) Old 06-22-2019, 02:02 PM Thread Starter
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4:10 diff in 2L GTV

finished it all up and have been driving it for a week or so. Granted, the motor is tired so put that up front.

I live in San Diego and Im half the time on freeway, half on surface streets. I say it is nice to be able to get through an intersection before shifting into second with the taller 4:10. Downside, The car now lacks even more pep than before (engine is tired!) but still I did not think it would be like this. Can barely get into 5th on the freeway before I'm passing everything ---- slow to accelerate / laggy at 3200 RPM. Speedo is WAY off (gotta be more than 10% I think). I have a decent street motor ready to go in but wanted to get views from others that have a GTV with 4:10 -- I think this car is slower than my 1750 spider with 4:10. !!!I did a refresh of the 4:56 in case it needs to go back in the GTV...... or spider for that matter!
Maybe I will get used to being in 4th most of the time?

Thanks!
bob

74 GTV with 10548's and Ingram pump
71 Spider 1750 BOMBER ; 1995 LS 78K tight fast car
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post #2 of 35 (permalink) Old 06-22-2019, 03:01 PM
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The car now lacks even more pep than before (engine is tired!) but still I did not think it would be like this. Can barely get into 5th on the freeway
I'd say the issue is your engine. I've got a 4.10 and a 2L in my Sprint, and like you, do much of my driving on the freeway. Just this morning, I had it on the 73 toll road (which is pretty hilly) heading to Cars & Coffee. It climbed the hills with no difficulty in 5th, at freeway speeds (roads are pretty quiet at 6:30 am on a Saturday). My 2L isn't particularly tuned, but is running well.

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post #3 of 35 (permalink) Old 06-22-2019, 03:45 PM
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I have a Euro 1750 with stock 4.10 diff. I think it is great. I can go as slow as 30mph in 5th and still accel slowly. Climbs reasonable hills in 5th above 50mph. and I have 205/60/15s.

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post #4 of 35 (permalink) Old 06-22-2019, 06:20 PM
I have a relatively stock '80 Spider with Spica and a 4.10 diff. I really enjoy driving it - never feel like it's lacking power. But I do live in a pancake flat area...

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post #5 of 35 (permalink) Old 06-22-2019, 07:09 PM
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I had a 410 and went back to the 454. It's an individual thing and personal preference. If I drove on the freeway more it might be for me. I have a fairly modified motor with plenty of power and the 454 shows it better for the way I drive.

The passenger seat is 15 miles an hour faster than the drivers seat.

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74 GTV restored daily driver
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the ones that got away:
1959 750 series Giulietta Spider Veloce
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post #6 of 35 (permalink) Old 06-22-2019, 07:39 PM
I will admit, I do enjoy my other Spider with a modified 2L and a 4.56 for most of my short distance driving. But for long hauls the 4.10 is my preferred. They are two different animals.

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post #7 of 35 (permalink) Old 06-22-2019, 07:53 PM
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At our altitude, we need all the extra help we can get.

I've tried GTVs with the 4.10 but is seems to really kill 2nd and 3rd gear acceleration. At sea level, this may not be as much of an issue at all.

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post #8 of 35 (permalink) Old 06-23-2019, 05:12 AM
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For some reason I'll never know people especially in pickup trucks want to bait me into contests of acceleration. I'm happy to oblige some of them and that's where the 454 shines.
Now that I have a Giulia we'll see if it continues?

The passenger seat is 15 miles an hour faster than the drivers seat.

currently
2017 Giulia Q4
74 GTV restored daily driver
71 Berlina in 2L restored driver
the ones that got away:
1959 750 series Giulietta Spider Veloce
1962 Giulietta Spider normale
1965 Giulia Sprint normale
1972 GTV
1974 GTV
1974 GTV
1977 Spider
1974 Spider
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post #9 of 35 (permalink) Old 06-23-2019, 08:52 AM
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Originally Posted by gigem75 View Post
For some reason I'll never know people especially in pickup trucks want to bait me into contests of acceleration. I'm happy to oblige some of them and that's where the 454 shines.
Now that I have a Giulia we'll see if it continues?
Is that one of the Giulias with the 29.3 second 0-170 mph time?

Mike
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1966 Super
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post #10 of 35 (permalink) Old 06-23-2019, 05:04 PM
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Guess I just have to be a naysayer . . . 4.10's were oem on 1750 GTV's. My European model '70 GTV had one and I quite liked the longer gears the lower ratio. I hated the way the 4.56 gears in my '67 GTV made first gear so short. While acceleration in 4th was a bit slower with the 4.10, I just learned to go down to 3rd when I needed acceleration. You couldn't comfortably do that with the 4.56 but you could with the 4.10. I drove my '70 GTV as a daily driver for almost a decade and alwyas felt that the ratios of the stock box fitted the 4.10 better. Some people opt for a 4.30 rear end whcih was oem for Euroean Berlinas and are said to tighten things up a bit. Of course---ahem---the final solution to Alfa gear-ratios is to fit a close-ratio gearset. 1st is a looong 2.54 (plus or minus) with 2nd and 3rd much closer together. I have a c/r box that I've had for a long time installed in my 2 liter Super. Even with the tight 4.77 rear end intended for a 1.3 engine, the c/r box works perfectly well. With that long 1st gear I never run out of gear even with the 4.77.
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post #11 of 35 (permalink) Old 06-23-2019, 05:41 PM
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It's kind of hard to be a naysayer when it's purely a personal preference. Or are you just trying to start a fight btw with the time it takes you to downshift to third I've mashed it and left you in the dust.
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The passenger seat is 15 miles an hour faster than the drivers seat.

currently
2017 Giulia Q4
74 GTV restored daily driver
71 Berlina in 2L restored driver
the ones that got away:
1959 750 series Giulietta Spider Veloce
1962 Giulietta Spider normale
1965 Giulia Sprint normale
1972 GTV
1974 GTV
1974 GTV
1977 Spider
1974 Spider
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post #12 of 35 (permalink) Old 06-23-2019, 08:17 PM
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You just think you're so smart!

Jim . . . '72 Super 1300, '70, 1750GTV, 2nd series,
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post #13 of 35 (permalink) Old 06-23-2019, 09:34 PM
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I must say this sounds surprising. The 2 litre engines are more about torque than power, they happily cope with 4.1 diff ratios. Even the 1750s do if everything else is operating normally. Mind you this is based on my experience with non-US cars.

Alister
1973 105 GTV (Alfa #6 of 19 owned)
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post #14 of 35 (permalink) Old 06-24-2019, 04:15 AM
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I always felt with the 410 I wasn't using the car the way it was designed. But my point is I've tried both and prefer the 454 and tried to go out of my way to say it's purely a personal preference. Neither one is better than the other. I've even used the shift time argument in favor of a 410 like in a drag race to sixty there was one less shift for the 410 vs the 454 and not having to waste time shifting the 410 would win. Jim and myself are just funnin'.

The passenger seat is 15 miles an hour faster than the drivers seat.

currently
2017 Giulia Q4
74 GTV restored daily driver
71 Berlina in 2L restored driver
the ones that got away:
1959 750 series Giulietta Spider Veloce
1962 Giulietta Spider normale
1965 Giulia Sprint normale
1972 GTV
1974 GTV
1974 GTV
1977 Spider
1974 Spider
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post #15 of 35 (permalink) Old 06-24-2019, 03:08 PM
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Quote:
Originally Posted by guillotineFI View Post
Around here it's East West v North South

GTVs are east west cars, and they are not north south cars fyi

a 4.1 diff won't make it a north south car.
Never heard of that reference? Where are you from? "Around here"?

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