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Going to take the slow duke to the track... by Fiero Finale
Started on: 05-10-2010 02:25 AM
Replies: 16
Last post by: Fiero Finale on 05-13-2010 03:53 AM
Fiero Finale
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Report this Post05-10-2010 02:25 AM Click Here to See the Profile for Fiero FinaleSend a Private Message to Fiero FinaleDirect Link to This Post
I'm gonna take my slow stock 88' duke 5-speed to the track this week...just to have fun and also have a "baseline" to compare to in progress as I do mods down the road..

Anyways I've haven't beat on it since I've had it since January and drive it like a grandma lol to get optimal mpg, so I don't know what is the "optimal" shift points on a duke? How high should rev on launch and each gear...yeah I know it's going to be slow, but whatever. Thanks

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thumper_64735
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Report this Post05-10-2010 03:46 AM Click Here to See the Profile for thumper_64735Click Here to Email thumper_64735Send a Private Message to thumper_64735Direct Link to This Post
I just took my wife's 85 duke to the track. I just shifted about the time it hit 3000 or so. seamed to work. Listen to the engine, it'll tell ya, and have fun
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pmbrunelle
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Report this Post05-10-2010 01:37 PM Click Here to See the Profile for pmbrunelleClick Here to Email pmbrunelleSend a Private Message to pmbrunelleDirect Link to This Post
http://www.fiero.nl/forum/Forum2/HTML/087194.html

Based on the stock dyno sheet, I would shift at 5000 RPM for the 1-2 shift, and 4500 RPM for subsequent shifts.

Launch RPM is going to depend on the traction available (tires, track)... 4000 RPM might be a good starting point.
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darkhorizon
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Report this Post05-10-2010 01:39 PM Click Here to See the Profile for darkhorizonSend a Private Message to darkhorizonDirect Link to This Post
shifting at 5000 with a duke is borderline insanity.
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pmbrunelle
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Report this Post05-10-2010 01:48 PM Click Here to See the Profile for pmbrunelleClick Here to Email pmbrunelleSend a Private Message to pmbrunelleDirect Link to This Post
Care to explain how you would extract better performance than the shift points I've suggested, using the Isuzu tranny?

1st: 3.73
2nd: 2.04
3rd: 1.45
4th: 1.03
5th: 0.74

From the thread I linked to:


If you're not revving to 5000, then you're not trying to win the race.
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carbon
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Report this Post05-10-2010 01:55 PM Click Here to See the Profile for carbonSend a Private Message to carbonDirect Link to This Post
 
quote
Originally posted by darkhorizon:

shifting at 5000 with a duke is borderline insanity.


Based on what? Revving it to its GM warranty covered red line?

 
quote
Originally posted by pmbrunelle:

Based on the stock dyno sheet, I would shift at 5000 RPM for the 1-2 shift, and 4500 RPM for subsequent shifts.





5000 in first and 4500 in the rest looks perfectly reasonable to me... better than 5000 in every gear...

[This message has been edited by carbon (edited 05-10-2010).]

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rogergarrison
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Report this Post05-10-2010 02:13 PM Click Here to See the Profile for rogergarrisonClick Here to Email rogergarrisonSend a Private Message to rogergarrisonDirect Link to This Post
Hey. its all fun. I ran my VW campervan, stock with full live- in interior in it down National Trails Dragway. I think it turned something like 22 seconds.
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TopNotch
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Report this Post05-10-2010 03:04 PM Click Here to See the Profile for TopNotchClick Here to visit TopNotch's HomePageSend a Private Message to TopNotchDirect Link to This Post
I think 4k - 4.5k is a good place to rev to in an 88 duke. It tends to run out of air higher than that, so you probably won't gain anything by revving higher.
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Hockaday
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Report this Post05-10-2010 03:07 PM Click Here to See the Profile for HockadaySend a Private Message to HockadayDirect Link to This Post
i shift 4500-5000 when having fun, i've hit 7000 before ( on accident ) but my engine ( the entire thing ) bucks so can't have alot of fun off the line
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Fiero Finale
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Report this Post05-10-2010 05:50 PM Click Here to See the Profile for Fiero FinaleSend a Private Message to Fiero FinaleDirect Link to This Post
Thanks for the responses guys, I guess i'll rev up to 4-5kish

I'm going tomorrow...who wants to play "price is right" (or better yet whatever that drag racing show is on Speed tv) with my best time lol.

I'm guessing 19.86 lol. I'm not offering a prize if you guess the closest, just bragging rights I guess lol.

Btw it's the car in my signature above. All "stock" except for an aftermarket radio and rubber floor mats, removing all unnecessary everyday items like jumper cables/first aid kit/etc. It has about 92k miles on it right now.
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Fiero Finale
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Report this Post05-10-2010 05:56 PM Click Here to See the Profile for Fiero FinaleSend a Private Message to Fiero FinaleDirect Link to This Post
EDIT: Stupid double post!

[This message has been edited by Fiero Finale (edited 05-10-2010).]

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Report this Post05-11-2010 07:33 AM Click Here to See the Profile for thumper_64735Click Here to Email thumper_64735Send a Private Message to thumper_64735Direct Link to This Post
well, looking back I guess I was shifting at around 4-4500, but the engine in mine only has about 30,000 on a GM crate engine, so I pushed it a little. How did yours do, and did ya have fun?
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Blacktree
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Report this Post05-11-2010 10:55 AM Click Here to See the Profile for BlacktreeClick Here to visit Blacktree's HomePageClick Here to Email BlacktreeSend a Private Message to BlacktreeDirect Link to This Post
I'm going to guess low 18s. BTW, if you post your timeslip, you'll have the distinction of being the only verified Duke entry on the Quarter Mile List.
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30+mpg
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Report this Post05-11-2010 06:48 PM Click Here to See the Profile for 30+mpgClick Here to Email 30+mpgSend a Private Message to 30+mpgDirect Link to This Post
 
quote
rogergarrison:...Hey. its all fun. ..


Yeah, especially the part where the Duke pushes the snapped connecting rod on the 20+ year old econo engine through the side of the block and the car does a James Bond smoke screen!

BTDT

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87antuzzi
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Report this Post05-11-2010 07:01 PM Click Here to See the Profile for 87antuzziClick Here to Email 87antuzziSend a Private Message to 87antuzziDirect Link to This Post
 
quote
Originally posted by 30+mpg:


Yeah, especially the part where the Duke pushes the snapped connecting rod on the 20+ year old econo engine through the side of the block and the car does a James Bond smoke screen!

BTDT


You need to visit my "the official i threw a rod while doing 80 mph thread"
http://www.fiero.nl/forum/Forum1/HTML/076635.html

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thumper_64735
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Report this Post05-11-2010 07:06 PM Click Here to See the Profile for thumper_64735Click Here to Email thumper_64735Send a Private Message to thumper_64735Direct Link to This Post
I've beat on both of my duke powered cars, and so far havn't had any problems with either. My 87 now has a massive leak from the timing cover, but it is slated for a 4.9 swap. The wife's 85 has a 35000 mile reman in it, and it did quite nicely at the track last weekend. There were no official times, so no timeslip, but I am planning on taking it to the local 1/4 mile track this summer before its 3800sc transformation begins, just to see the before and after. Way I look at it, have fun with it, and if the engine does let go, just gives ya an excuse to do upgrades sooner, lol.
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Fiero Finale
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Report this Post05-13-2010 03:53 AM Click Here to See the Profile for Fiero FinaleSend a Private Message to Fiero FinaleDirect Link to This Post
 
quote
Originally posted by Blacktree:

I'm going to guess low 18s. BTW, if you post your timeslip, you'll have the distinction of being the only verified Duke entry on the Quarter Mile List.


Thanks for the heads up! Going over to the thread now to post my timeslip/info.

So anyways the racing turned out great. I did 4 runs, my best (2nd run) was 18.56 but my 4th would have been my best as it was the best reaction time (.272 which to give an idea my first run was .847) of the night but I missed third, yet I still did a 18.57 on that run! I also met another Fiero owner who saw this thread on PFF he said lol. He had a blue with double white stripes Fiero with a 3800 S/C. While waiting outside cars chatting with everyone in the lanes as we had to wait, another guy came up and said he saw this thread on PFF too, but he didn't have a Fiero (that I saw). Neither person said their forum names...

Anyways now I have a basis to compare and a feel for drag racing the Fiero for when I take it again hopefully in the next couple months after doing a tune up and maybe some minor mods. Fun times..
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