Bostig flat spot in acceleration?

syncrodan · Posted: Thu Apr 18, 2013 8:01 pm Post subject: Bostig flat spot in acceleration?

(I'm a Bostig newby group 21) Has anyone had issues with a flat spot in acceleration? Mine drops in power at about 3700ish and comes back at 4000. It's not a huge issue but I was just curious if anyone else is having the issue, I've created a ticket already. Mine's also idling at 2000 rpm at cold start for about one minute then it settles at 950 or so. I included that on the ticket too.

shizzon · Posted: Thu Apr 18, 2013 9:07 pm Post subject:

I've had both of those issues.. I'm curious to know what you find!
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1989 Bostig Syncro Westy

Phishman068 · Posted: Fri Apr 19, 2013 7:14 am Post subject:

Give Bostig a call (as is always the case with things like this) as they may have some things to look into.
I had a bit of a flat spot, and i've dramatically improved it, though I don't remember exactly what I had to fix....

In part it deal with your gearing/tire size in my opinion, at least in the lower RPM registers. Your well into the range where you should have some power though.
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shizzon · Posted: Mon May 06, 2013 10:24 am Post subject:

did you ever get a resolution to this? i'm working on mine thru the ticket system
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1989 Bostig Syncro Westy

Vsyevolod · Posted: Mon May 06, 2013 11:48 am Post subject:

I don't have this issue, not sure why... Though I did upgrade to 16" wheels and Nokian tires. That and Darrel put a taller 3rd gear in my Tranny... Maybe that's all it takes? Smile

Stephen

.

boulderdrop · Posted: Mon May 06, 2013 11:58 am Post subject:

I put a taller 3rd in my transaxle with a Bostig, my mind doesn't really wrap around where your flat-spot is.. but I wish I didn't change the gearing, it kind of sucks shifting from 2nd to 3rd (but I really like the new top-range of 3rd for mountain passes). But that would certainly be a poor performance area IMHO.
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NC Dude · Posted: Mon May 06, 2013 12:45 pm Post subject:

No flat spot here-sorry to hear it man
I'm running 15" steelies with 215/75R15's with a stock geared tranny
Have you captured a driving log for Bostig to look at?

LemonCove · Posted: Mon May 06, 2013 1:15 pm Post subject:

Sychrodan & Shizzon-

My problem is a bit different with my group 19. I have smooth power to about 4000 rpm, then start to lose power. I can't push through it. Feels like the governors they used to put on rental trucks. Idle is very smooth at about 900.

This is OK most of the time, because my shift points and cruising speeds are below 4K. The problem is on a steep hill (e.g. Halloran Pass on I-15) when 4th gear is too high, and I cant exceed 4K rpm in 3rd. If you lose momentum, you're stuck in 3rd at around 40mph until you crest the hill.

I also have a support ticket in to Jim at Bostig (Just changed out the coil to no effect).

Your problem may be related to mine. I'd like to know what the fix ends up being. When I get mine fixed, I'll also post here.

Jed


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