I was out in the country going to go look at a 1980 242 and i came across a very nicely paved road. So i decided to see what my wagon could do. Got up to 100 real quick but was then slowly creeping to 110. It wouldnt go past 110 I was at wot and doing 110 for at least 15 seconds and would move no more... So you could probably guess the question... Why would it not go past this speed? Is there a limiter? Anyone else have this problem?

 

I have a 300 dollar beater in transition and I haven't had mine over 80 yet. I know they do have a fuel cut off but I'm not sure if it's tied to excess boost or RPM.
Did you happen to notice what RPM you were at ?
Interested to hear what other owners have pushed their 850s to ??

 

I've gotten my N/A to 115, and it would have done more, I just ran out of straight road. I'd guess boost cutoff

 

My guess is governed for the US or your 20 year old car has lost a lot of horsepower due to wear. Horsepower is probably the best answer. Should be able to do 140 or so, at least when new.

 

I had just gotten in 4 the gear around 100 and I was stuck at about 4k rpms. This was in sport mode with my boost turned up to about 9 psi with mbc.

 

For North America it is limited to 142 mph. It's unlimited elsewhere. There was an article somewhere I looked it up once and the Turbo wagon could do something like 155 to 166 mph unlimited? when it first came out. That was done in a close course oval circuit. Heck the speedometer in the UK are like up to 160 mph.

 

It hasn't lost that much if it will smoke The tires off in second. If it was low on HP it would still build speed my car just completely froze at 110.

 

Smoking the tires at a gear change (in which the road/tires are basically arresting the engine which has gained much rotational inertia, from a higher RPM to a lower one, via a higher gear ratio) is not the same thing as steady state power.

You could be limited because the computer is pulling spark because it sees knock and is trying to keep you from burning a hole in a piston.

 

Man, every one of our turbo cars would whip past 110. I had our S70 GLT up to about 12) and it was still picking up speed, had already proven my point to the Maxi that didn't want to let me pass. I had my 960 up to 11*, it was stuck there, lots of weight in the car (vacation). I have seen 13) in my daughters GPS (the S70 GLT). I had my yellow sedan up to about 12) and it was still bitting. Have not had the wagon over maybe 9) yet.

I actually was thinking that you had a NA car which would be about the cars HP limit.

 

I guess the question is... what octane gas are you burning?

Also, when was your last tune up?

 

I just did the ccomplete ignition tune up with all oem componets. I run 91 octane because that is the hightest I fan find in Iowa. I still have the misfire I mentioned on my previous post. I think I'm going to get a new fuel filter and regulator I think that's the problem with my misfiring situation and the fuel filter/ regulator would definately limit your top speed at least thats my theory.

 

You definitely need to get that misfire figured out before you try a top speed run. Extended high RPM operation is guaranteed to burn a hole in the piston of a turbo car with fuel problems.

 

When my car was bone stock I got up to 147mph, I think all auto/manual T5/Rs are limited to 155mph.

After my ecu remap, I got to 156mph..vid below:
. - YouTube

From all the "professional" reviews i've read over the years, turbo auto HPT volvos seem to top out at 150, 155(governed) with the manual. LPTs stay around 125-130mph.

 

I'd also do a compression test while at it. You may want to run some fuel injector cleaner through the next tank of gas.

 

My guess would be you bumped into fuel cutoff because of the boost. If your ECM is stock you were in the range where the ECM would step in to keep the system from putting itself in danger (in it's mind).

But ... like Turkey Sandwich said, you might be having some knock which would pull back on timing and leave you with nothing to accelerate with. Hopefully you're using premium and hopefully it really is premium (little bit of paranoia every time I pass a gas station and I see an unbranded tanker dumping it's load )

I'm just guessing. But if you get a chance to do it again try to get into fifth gear and keep the boost at 8 or less and see if it pulls more MPH. If others are hitting 130 or more as they've stated here, it's likely you're hitting fuel cutoff due to boost. As always, if you buy an upgraded ECM that can all be changed

 

I've already ran chevron techron and didn't seem to help much. I just put seafoam in for the hell of it. The fuel filter looks original, I don't know why some people think they don't have to change it lol. I've already ordered the filter and I'm just gonna wait on the fuel regulator and see if its just the filter.... Ipd wants 125.

 

Yea i don't have a fifth gear lol but ill try it in 4th, and once i get this misfiring problem gone I'm going to get the ard white tune and hopefully get the famous obx exhaust or make a custom one since I do have a welder.. I'm also going to install my aem wideband whenever it gets a little warmer out that way it will be a little easier to see if its a fuel problem or vac leak...

 

I missed the post where you said you had a misfire. That would be problem enough to keep the engine from pushing it any faster. I was thinking you had a manual opps

For some people if it isn't in their face they have no clue. As that filter is under the car I'd venture to guess there are some out there that have no idea the car even has one.

I still have arguments with guys who want "the stuff for a tune up" and want to fight about the fact they want wires, cap and rotor on a vehicle that is coil on plug. They just have no clue.

 

Hey vmaxx just wondering what all do you have done to that thing....just watched your video pretty impressed.... That's the performance I'm aiming for.

 

Only performance mods are a k&n panel filter and an ECU remap (16psi) from an expert tuner (ARD).