williamsGN
'Horse sneeze' addict
- Joined
- Sep 20, 2007
- Messages
- 2,122
Anyone know how Buick gained the extra HP from 86's 235HP to 87's 245HP ?
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SignUp Now!williamsGN said:Anyone know how Buick gained the extra HP from 86's 235HP to 87's 245HP ?
In the recent movie, one of the guys said that the Vette was bumped to 240 hp in 1987. So, to stick it in Chevy's eye, Buick bumped the rating of the GN to 245. No changes were made to the engine.
williamsGN said:Haha.. think so ?
coach said:Yep. He said the actual reading was 245, but they did not need to advertise it at 245, so they wrote 235. In 87 when Chevrolet added hp to the Vette...they just decided to release the actual hp of 245. It was funny listening to him because, as we know, they coulda just kept raising it by adding boost. The Vette didnt stand a chance.
Buick Mark said:Yep, it was 245hp in '86, Buick was pissing off Chevy. Thats one of the reasons Buick didnt have a G body platform in '88 and Chevy, Pontiac, and Olds did. Buick was being spanked by GM for having a faster car and more powerful engine than Chevy, BAAAAAAAAAAAD Buick, no more rear drive Regal for you!
Tom, the truth about the difference between a stock 86 chip and a stock 87 chip is this:I've been told by accurate sources that there was a slight calibration change in the computer chip which raised the HP to 245 and Torque to 355ft.lbs vs the 86's 235HP and 330ft. lbs of torque. No physical changes in any engine components. Wether or not this is really an accurate truth is unknown.
dennisL said:Tom, the truth about the difference between a stock 86 chip and a stock 87 chip is this:
- In the 87 chip, the afr is slightly less rich during engine warm-up
- In the 87 chip, the base PE afr at 133 degF is leaner than in 86 (14:1 vs 13.5:1)
That's it. Both changes were probably dictated by slightly stricter emissions laws. As for performance, if anything the 86 chip would make a pinch more hp at 133 degF since the PE base afr is richer.
Oh, and show this to your "accurate source" and have them contact me if there are any questions.
Dennis
3.8L V-8 eater said:I always heard that extra 10HP was due to the 87 having an adjustable wastegate actuator the 86 didn't have.....However, If anyone woud know it would be Ron Yuille....