Calling all turbo escorts...
 

I'm trying to help a friend of mine out with a 91 escort gt that he turbo'd. Now, since i'm pretty much a straight up Honda guy, i'm kinda lost here. He's got the twin-cam motor, which is pretty much the same as the Mazda one i've been told, with a t3 turbo, i believe it's a .63 a/r, FMIC, and is set somewhere around 11 psi. For management he's using dsm 450's with a safc. The problem is, around 4k-5k rpms it stumbles bad, then clears up and takes off like a bat outta hell. We gapped the plugs down alot, and still no luck, retarded the dizzy and still nothing. I even played around with the afc settings, and the only thing that sorta worked for a little while was when i set the throttle to 98% low, and 99% high. But after about 20 minutes it started breaking up again. He has a walbro 255lph in it as well, and a fpr with the fuel psi set to around 50 psi at idle. Any of you guys ever had any issues with this before? We even put a MSD 6AL box on that he had laying around to see if it would make any difference, but still nothing. I'm personally at a loss to what it might be :-\

Re: Calling all turbo escorts...
 

'91 GT is still the 1.9l HO SOHC, unless there's been some engine swap mayhem.

There was a guy named John Smith who had one of the 1.9l SOHCs built all to ----, and knew his Escorts, about 3-4 years back. He posted up to the jyturbo Yahoogroups.com mailling list, and might still lurk there... he linked once to a HUGE Escort tech forum that was about as big as Honda-Tech was at the time. It was at some wack-ass URL, though, so no clue.

Re: Calling all turbo escorts...
 

sorry to sound like a dick, but your wrong, 91 GT is dohc madza 1.8 liter. pretty powerful motor. would beat a GSR anyday.

Re: Calling all turbo escorts...
 

Huh, you're right. Apparently the bodystyle change occurred in '91, I thought it was '93 or somesuch.

It's just a Mazda B6 like went in the later Miata with the intake and exhaust sides switcher-ooed. It's not likely to beat a GSR unless the GSR has something wrong with it.

Re: Calling all turbo escorts...
 

have you tried the throttle % crossover at like 20 for low and 21 for high, i had to do this on one of my old turbo civics

Re: Calling all turbo escorts...
 

seriously, bone stock on 195/50/15s ran a 14.8

Re: Calling all turbo escorts...
 

Seriously, bone stock Integra LS on 14" steelies run 15.0...

Re: Calling all turbo escorts...
 

wow i almost needed a shovel to get through all the bs in here.....

But yeah im running the same motor but i never really used the safc. The only thing i can think of is that around the point the second set of intake runners opens up and that would probably cause a stumble if you didnt take that into account. Any more info on the setup?

Re: Calling all turbo escorts...
 

Isn't 50 psi kind of high on the fp?
Erich

Re: Calling all turbo escorts...
 

Excuse me?

Re: Calling all turbo escorts...
 

What do the AFR's look like?

It sounds like a torque peak lean stumble to me.

Re: Calling all turbo escorts...
 

one other thing (assuming its a 5 speed) if you havent swapped the TPS to a 4 wire one then the throttle will either be 0 or 100% since its not a potentiometer type.

Re: Calling all turbo escorts...
 

I've yet to see a TPS that wasn't a potentiometer type, four wires are pot + WOT switch.

And you havent explained yourself - what bullshit?

Re: Calling all turbo escorts...
 

Take a look at a 91-95 Escort GT 5spd and you'll see one thats not a potentiometer.

and the bs....a stock egt running a 14.8 or a stock LS running a 15.0 and the part about it being the same as a mazda b6 with the intake and exhaust switched. :-*

Re: Calling all turbo escorts...
 

Possibly; it is a MAF engine. Given what you know I'm taking it with not just a grain of salt, but the whole goddamn cellar.

I dunno anything about what Escort GTs run, that wasn't me, but stock LS in the hands of good drivers run flat 15's. I've spent a couple summers at a local 1/8th mile track and seen stock LS run flat 10.0's there.

What, you think that ---- was a Ford engine? Look here, n00b:

http://members.aol.com/solomiata/MX5Engine.html - this is from Randy S, who *was* solomiata.com until he let the site reg lapse
http://www.importperformanceparts.ne...ves-mazda.html Look, they run the same valves!
http://eelink.net/~p-nowak/EEC-Archive/msg08819.html Hrm... interesting.


One day you might know something, n00b. Keep cracking at it.

Re: Calling all turbo escorts...
 

Forgot to close this window out: http://corksport.com/page/yv/5_Escort_323.html

Re: Calling all turbo escorts...
 

yep.....and my cock is 12 inches long, bone stock.....seriously.

Re: Calling all turbo escorts...
 

lol im glad you are such an expert in what i know. And my bs comment was more intended towards the track times. Also the engine is a BP, the B6 is mazda's 1.6L series. But im sure you knew that. And i did homebuild my own turbo setup including building/tuning a megasquirt for engine management so i think i have atleast somewhat of a clue.

But anyways back to the original poster.....any more info on the setup? pics?

Re: Calling all turbo escorts...
 

No, B5 is the 1.3 out of the Festiva, B6 is 1.6/1.8.

Shall I offer more links? ::)

Re: Calling all turbo escorts...
 

No allow me,

Mazda 4cyl guide
http://members.aol.com/solomiata/MX5Engine.html

Read the chart at the bottom....namely this part
1.8 DOHC BP 1990-2001 83 85 1839 90-98 Protege, 91-96 Ford Escort GT, 94-01 Miata, Mercury Tracer LTS, 94-97 Kia Sephia GS

Re: Calling all turbo escorts...
 

Hmm...that's something i didn't even think about, i'll have to check. It originally was an auto that was swapped to a 5 spd. As for the motor itself, it's pretty much exactly like the mazda version (he even has the mazda valve cover on it), but i don't know the exact engine code.His afr's are rich as ----, low 10's across the board. When he first got it running it was even richer and didn't even want to run. I took alot of fuel out, but no matter what i tried, it always had that stumble. I don't know if it will make a difference or not, but his bov is not recirced back into the maf sensor, but yet he doesn't have the stumbling problem that's normally associated with an open recirc. It just breaks up really bad between 4-5k rpm's, under load and at a stop.Ehh, not really considering it's a walbro. Heck, my civic runs at 65 psi at idle...anything lower and it goes bonkers.

I wish I had some pics...shoulda took some while I was there...I might be able to get some this weekend if he's around.

Re: Calling all turbo escorts...
 

Dude no offence but you are wrong really wrong. Ok here it is in a nutshell, B6 is in the 90-93 miata and some mercury capris, and was only a 1.6L, BP was the 1.8L offered in the 91-96 escort GT's, some mazda protege's, 94 up miata's some Kias as well. And the intake and exhaust are diff but not switched around. The miata T/B faces towards the cam gears as to where it was the rest it faced the dist side. The exhaust mani is diff only due to being either FWD or RWD fitment. The intake in the miata also didnt have the VICS system the others got. But the miatas got soild lifters on certain years. There is also a B6T and a BPT but I dont want to confuse you with those.

Re: Calling all turbo escorts...
 

Lol...didn't realize this thread was still floating around :D That's ok, the guy ended up driving it anyway, popped his headgasket, and has decided to rebuild everything top to bottom for boost, bust still use that damn afc ::) I'm done dealing with the dude, he's too much of a pita. Every time one of his or his puerto rican homies car's hickup they drag my ass down there to check it out :P