Chevelle board? A question on the 396/402
#2781454
06/04/20 05:35 PM
06/04/20 05:35 PM
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Joined: Jan 2003
Posts: 4,051 Connecticut
jeff968
OP
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OP
master
Joined: Jan 2003
Posts: 4,051
Connecticut
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does anyone know of a good Chevelle board? A buddy and I are looking for an answer to this question:
In the current Hemming's muscle machines in the 69 Chevelle SS profile it states the 396 was increased in size to 402 later in the 69 model year. meaning that some 69s got the 402. My buddy swears it was a year later meaning that all 69s got 396s and 70 was the year that had both.
Sorry for the non-mopar post.
Thx
1970 Dodge Challenger T/A
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Re: Chevelle board? A question on the 396/402
[Re: jeff968]
#2781480
06/04/20 07:00 PM
06/04/20 07:00 PM
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Joined: Jan 2003
Posts: 1,663 E.Amherst, NY
69RR
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,663
E.Amherst, NY
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does anyone know of a good Chevelle board? A buddy and I are looking for an answer to this question:
In the current Hemming's muscle machines in the 69 Chevelle SS profile it states the 396 was increased in size to 402 later in the 69 model year. meaning that some 69s got the 402. My buddy swears it was a year later meaning that all 69s got 396s and 70 was the year that had both.
Sorry for the non-mopar post.
Thx Team Chevelle would be the place - I'm on there now that I have 67 SS. Some very knowledgeable people on board - like here.
Dean
Got my hands on the wheel, foot to the pedal, gonna drive this car till the tires turn to metal - gonna sleep when I'm dead and laugh at the devil..
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Re: Chevelle board? A question on the 396/402
[Re: jeff968]
#2781491
06/04/20 07:29 PM
06/04/20 07:29 PM
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Joined: Dec 2009
Posts: 20,640 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
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does anyone know of a good Chevelle board? A buddy and I are looking for an answer to this question:
In the current Hemming's muscle machines in the 69 Chevelle SS profile it states the 396 was increased in size to 402 later in the 69 model year. meaning that some 69s got the 402. My buddy swears it was a year later meaning that all 69s got 396s and 70 was the year that had both.
Sorry for the non-mopar post.
Thx Seriously, no one can tell the difference in 6 cubic inches.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Chevelle board? A question on the 396/402
[Re: jeff968]
#2781521
06/04/20 08:53 PM
06/04/20 08:53 PM
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Joined: Jan 2003
Posts: 31,050 Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 31,050
Oregon
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When I was a kid we used to think that the 396 was the hot setup and that the 402 was a dog. Not sure why, that was just the "word on the street" back then. But really if they both were built with the same parts then they should run just the same. The L98 402 was pretty stout with 375 hp rating. I'm not sure on the '69 and '70 thing. Officially the SS 396 was actually a 402 in 1970 but it wouldn't surprise me at all to find out that some of the '69 cars got 402 engines. The factory wouldn't care that much about that stuff. They just put them together with the parts they have on hand.
Last edited by AndyF; 06/04/20 08:53 PM.
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Re: Chevelle board? A question on the 396/402
[Re: Guitar Jones]
#2781535
06/04/20 09:41 PM
06/04/20 09:41 PM
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Joined: Nov 2007
Posts: 21,831 Kirkland, Washington
Pacnorthcuda
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Too Many Posts
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Posts: 21,831
Kirkland, Washington
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does anyone know of a good Chevelle board? A buddy and I are looking for an answer to this question:
In the current Hemming's muscle machines in the 69 Chevelle SS profile it states the 396 was increased in size to 402 later in the 69 model year. meaning that some 69s got the 402. My buddy swears it was a year later meaning that all 69s got 396s and 70 was the year that had both.
Sorry for the non-mopar post.
Thx Seriously, no one can tell the difference in 6 cubic inches. I don’t think that is the point. And a micrometer certainly can.
Last edited by Pacnorthcuda; 06/04/20 09:41 PM.
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Re: Chevelle board? A question on the 396/402
[Re: Pacnorthcuda]
#2781558
06/04/20 11:10 PM
06/04/20 11:10 PM
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Joined: Jan 2003
Posts: 20,185 Park Forest, IL
slantzilla
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Too Many Posts
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Posts: 20,185
Park Forest, IL
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The 402 kinda got overshadowed by the 454.
"Everybody funny, now you funny too."
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Re: Chevelle board? A question on the 396/402
[Re: 6bblgt]
#2781585
06/05/20 01:46 AM
06/05/20 01:46 AM
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Joined: Jan 2003
Posts: 22,900 Gabba Gabba Hey! NYC
Diego (not Ted)
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Too Many Posts
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Gabba Gabba Hey! NYC
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the 402 is to the 396 (Hollander lists the change as late '69 model year) as the 400 is to the 383 I kinda disagree with this, but only for this reason: All engines experienced a natural progression of cubic inches. The BBC started with 396 and went to 427 and 454. The 402 in between that sequence may or may not have been for some emissions reason, but notice the increase was marginal. Compare it to the B engine, which went from 350 to 361 and 383 and 400. Notice the last leap was 17 cid, which was not insignificant. This site ( http://www.chevellestuff.net/1970/70ss.htm) suggests engines under/over 400cid had different emissions regulations, and tweaking the 396 to tip over 400 may have solved the issue. But what was the issue? Regarding the OP's query, I don't have the article in question, but let me offer an opinion that Hemmings is wrong when talking about Chevelles and partially correct when talking about the Camaro. For most of the Chevys, the model year began in Sept, but the Camaro was delayed into the beginning of 1970. Hence, 1969 Camaro production was extended into November or December 1969. I would think these cars built in August through the end of the year came with 402s. Wanna hear something confusing? The 402, as optioned in Chevelles that were not SSs, was called the 400. So there was a 402 that was marketed as a 396 AND a 400 (and, no, not to be confused with the 400 SBC)!
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Re: Chevelle board? A question on the 396/402
[Re: Diego (not Ted)]
#2781626
06/05/20 09:57 AM
06/05/20 09:57 AM
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Joined: Jan 2003
Posts: 4,051 Connecticut
jeff968
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OP
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Connecticut
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here is the section from the article.
1970 Dodge Challenger T/A
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Re: Chevelle board? A question on the 396/402
[Re: Diego (not Ted)]
#2781647
06/05/20 11:01 AM
06/05/20 11:01 AM
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Joined: May 2003
Posts: 6,566 Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,566
Downtown Roebuck Ont
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the 402 is to the 396 (Hollander lists the change as late '69 model year) as the 400 is to the 383 I kinda disagree with this, but only for this reason: All engines experienced a natural progression of cubic inches. The BBC started with 396 and went to 427 and 454. The 402 in between that sequence may or may not have been for some emissions reason, but notice the increase was marginal. Compare it to the B engine, which went from 350 to 361 and 383 and 400. Notice the last leap was 17 cid, which was not insignificant. This site ( http://www.chevellestuff.net/1970/70ss.htm) suggests engines under/over 400cid had different emissions regulations, and tweaking the 396 to tip over 400 may have solved the issue. But what was the issue? Regarding the OP's query, I don't have the article in question, but let me offer an opinion that Hemmings is wrong when talking about Chevelles and partially correct when talking about the Camaro. For most of the Chevys, the model year began in Sept, but the Camaro was delayed into the beginning of 1970. Hence, 1969 Camaro production was extended into November or December 1969. I would think these cars built in August through the end of the year came with 402s. Wanna hear something confusing? The 402, as optioned in Chevelles that were not SSs, was called the 400. So there was a 402 that was marketed as a 396 AND a 400 (and, no, not to be confused with the 400 SBC)! C10 pickups were the same way. A Cheyenne badged as a 400 would have a 402 in it. Kevin
Last edited by Twostick; 06/05/20 11:03 AM.
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Re: Chevelle board? A question on the 396/402
[Re: Neil]
#2781749
06/05/20 02:02 PM
06/05/20 02:02 PM
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Joined: Jan 2003
Posts: 17,518 Las Vegas, NV
6bblgt
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,518
Las Vegas, NV
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have you ever seen a 396 with a smog pump, how about a 402? additional components cost $$$ (the minimal increase in displacement was a cost consideration, a new block was not engineered) in the mid-'70s 440s received smog pumps in CA (low production quantities) but was not required on the 400 (larger production numbers offset the costs bringing the new engine to production) & to save costs, Chrysler Corp. wanted the new "B" engine to share its bore with the 440 at 4.320", but with the 3.375 "B" engine stroke that would've been 396 cu.in. (wasn't going to happen ) someone suggested "400 cu.in." sounded better & bore was increased to 4.342"
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Re: Chevelle board? A question on the 396/402
[Re: second 70]
#2781815
06/05/20 04:53 PM
06/05/20 04:53 PM
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Joined: Aug 2003
Posts: 4,988 new jersey usa
11secdart
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master
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new jersey usa
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Although I am a diehard Mopar guy, I have always liked Chevelles .. this is my friends 70 a former Super/Stock car now a street car. He bought it from his good friend who was the original owner.. car is gorgeous!
Last edited by 11secdart; 06/05/20 04:57 PM.
68 Dart 410 / 904 92 D150 original owner 21 Ram 1500 Quad Cab, Big Horn , Hemi ,4x4 23 Audi Q5 16 Honda HRV
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Re: Chevelle board? A question on the 396/402
[Re: AndyF]
#2781831
06/05/20 06:05 PM
06/05/20 06:05 PM
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Joined: Jan 2003
Posts: 22,900 Gabba Gabba Hey! NYC
Diego (not Ted)
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Too Many Posts
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Gabba Gabba Hey! NYC
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That 402 had a real identity crisis. I think the marketing folks knew that the 402 was considered a dog so they didn't want to tell anyone about it. Weird stuff. The only one considering it a dog is you. In 1970, the top 402 had solid lifters and 375 horses. This engine, known as the L78, is pretty famous. The 402/330 that was introduced for regular Chevelles and the Monte Carlo is known as the LS3. It continued on for a few more years. being rated at 300 horses in 1971 and I can't remember what in 1972. How does that compare with dog 383s and 400s from 1971 and beyond? Like I suggested, it's just your perception.
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