100 mph shut off

J

joes sy

New member
I know im a newbie. But i recently purchased a 91 syclone. It has a kenne belle intake 3 in and a 3 inch cat back exhaust a adjustable fuel pressure reg. and a msd ditributor with msd wires. I ran it at the track on fridat and it went 13.9 at 99.99. Then i went to the street races and raced a couple of car and it shut off at a 100 i thought it felt weird at the track but didnt think it would actullay shut off at a 100 can any one help me
 
dgoodhue

dgoodhue

BuSTeD 4.3
Your proabaly hitting the chip rev limiter in 3rd gear. Put your truck in 3rd gear and try upshift to OD at around 4500 rpm.
 
Syclone#1992

Syclone#1992

SyTy.net Moderator
13.9 isn't that great for a stock Syclone, I suggest you look into tuning it up and getting datamaster on it before you start racing it a lot.
 
dgoodhue

dgoodhue

BuSTeD 4.3
100 mph is a decent trap speed for a Syclone, but I am guess that he isn't luanch off the line properly.
 
J

joes sy

New member
I also have a boost guage and and it will hit almost 19 pds and then drop off to 10 at a higher speed run
 
Jimmy

Jimmy

Banned
joes sy said:
I also have a boost guage and and it will hit almost 19 pds and then drop off to 10 at a higher speed run
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You better have alky or be running race gas to run 19psi :eek:

My guess is it's overboosting.
 
SeattleSy#1255

SeattleSy#1255

Category 5 Conservative
ya i'd guess overboosting and your boost control is flat out crappy. I'd look into what chip you have in that thing. If its a KB, get that crap out before it blows you motor.
 
dgoodhue

dgoodhue

BuSTeD 4.3
joes sy said:
http://www.syty.net/phpBB2/viewtopic.php?t=38467
Here is the turck ibought
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I am 100% sure but that maybe the guy who bought it off of ebay a year ago and immediately tried to resell it..... (even before he picked it up)
 
sy538

sy538

New member
dgoodhue said:
Both my Sy and Ty won't do a WOT 3-4 upshift, if I leave the tranny in OD and let it shift itself. However if my truck is in 3rd gear (D) and shift it myself I have no problems.
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I'll have to try that, but i dont think it will work on my truck because , it will shift back down to 3rd if i go wot again after letting up enough for it to shift into 4th.
 
dgoodhue

dgoodhue

BuSTeD 4.3
sy538 said:
I'll have to try that, but i dont think it will work on my truck because , it will shift back down to 3rd if i go wot again after letting up enough for it to shift into 4th.
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My truck does the same thing, if I leave it in OD and let up on the gas to shift to OD and try to go WOT it goes to 3rd (even if I continued to accelerated at 3/4 throttle) I don't know how high until it no longer does the down shift to 3rd but I once saw 5100 on a down shift :eek:
 
sy538

sy538

New member
I tried this today and it didn’t work. I'm cruising down the road at 55-60 mph, shift into 3rd, step on it, at about 4600-4700 rpm I move the shift lever to 4th, but the truck didn’t shift it stayed in 3rd and hit the rev limiter. Do you have a chip, is the rev limit on your truck above the stock 4700-4800 rpm?
 
dgoodhue

dgoodhue

BuSTeD 4.3
sy538 said:
I tried this today and it didn’t work. I'm cruising down the road at 55-60 mph, shift into 3rd, step on it, at about 4600-4700 rpm I move the shift lever to 4th, but the truck didn’t shift it stayed in 3rd and hit the rev limiter. Do you have a chip, is the rev limit on your truck above the stock 4700-4800 rpm?
Click to expand...

I shift about 4500 rpm, but mine clearly goes into OD. I do have a chip, but my MSD rpm limiter is 4800 rpm, my traps are a little over 103mph.
 
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