To build the ultimate 3.4 DOHC: Turbo DYNO NUMBERS

[Shaun41178(2)]

get the car tuned first before swapping to larger injectors.

Also I would strongly suggest finding someone locally that is very familiar with haltechs and can have it tuned in 2-3 hours on a dyno.

[fieromadman]

The shop that I was going to take it to to have it dyno tuned no longer employees the guy that knows how to tune Haltechs. There are no more reputable shops around that I trust to tune it except for AMS, but they are REALLY expensive. I have about 2 hours of actual tuning into the car... it is going to need a ton more, I know that! Also I do plan on throwing it on a dyno for an hour or two but it's probably going to be my friend and I tuning it at least until I can afford some true professional help (my friend who's helping me tune has done ALOT of tuning but nothing on a real standalone that didn't have a decent base map or a ton of information available to help).

[fieromadman]

Having gone over the tune again, my air fuels are much better than what they were before. Still needs some more work, but realistically it doesn't matter because I cant get on it because my tranny is fucked anyhow.

I have re-adjusted the shift cables twice and the clutch is releasing fully and I still can't get the damn thing to shift at higher rpms and higher boost. The shifter just locks in whatever gear you had it in until you coast for a little while. Has anyone had these issues before? I think the gears might be pushing apart and causing it to lock up, but that's just my theory.

[Shaun41178(2)]

what if you bring the rpms up not in boost and no load like in second gear, can you get it to shift? is it hard in all gears like from 1 to 2 and 2 to 3 and so on? or just when going from certain gears?

you check your fluid in the tranny? Also you sure the slave doesn't have air in it? I can see the clutch able to disengage enough at lower rpm with less slave rod travel, but would need more with more rpm and more load. I say the problem is with your clutch hydraulics.

[fieromadman]

I've never checked that stuff I'll have to. I know that the clutch engages/disengages at the top of the pedal travel when at lower rpms. I replaced the slave cylinder and bleed the clutch until I saw no bubbles when I first got it running. As far as gears go, it seems like mainly second and third are bad, fourth is a maybe because I haven't wanted to abuse the engine that much with a kinda sketchy tune, but it felt a little funny today when I was getting in it a bit on the freeway.

[fieromadman]

So I'm going to get another transmission tomorrow. It's a 93 chevy beretta transmission. I'm just going to use the bellhousing off that transmission on my ebay transmission. I checked the oil on my transmission that is in the car and its clean and full. I tried revving it out when I wasn't on it and it did the same thing. So its messed up but I don't know why. The clutch disengages because the revs drop right away when I push it in even when the revs are built up.

On the other hand this car did something that it has never done the other day. I rolled into the gas in first gear and it lit up the tires. Unfortunately I still have a fuel problem (I think that it's just in need of bigger injectors) so until mid June I wont be able to really get some good times or numbers or anything like that.

[fieromadman]

Here's some food for thought...

I'm considering the possibility that crank walk is causing my shifting problems due to the heavy duty clutch that I am using? Anybody think that this is a possibility? The only other thing that I could think of is that the trans case has too much slop and the gears are pushing apart enough to lock them in place? It's just plain weird what is happening with the lack of shifting. I guess we'll see if a new tranny fixes it soon enough.

[Shaun41178(2)]

not going to be crank walk. I doubt your pressure plate is that strong.

[Matt Hawkins]

When you are sitting still, engine running and clutch in, can you shift through the gears? If you can, it's nothing to do with the clutch.

[fieromadman]

Well the pressure plate is a dual diaphragm. But yes I can shift through all gears while sitting still.

No other updates for you guys right now. Just been driving it and taking it easy getting the fuel trims adjusted as best I can for fuel economy, power, and driveability. Waiting on funds for injectors and motivation to finish the tranny.

[Shaun41178(2)]

you don't need larger injectors on the 5 psi you are running.

[fieromadman]

Well I guess you must be the one tuning my car, driving it almost everyday seeing 16ms of injection time and it still not going any richer than about 11.7 afr up top? They ARE maxxed out.

[Shaun41178(2)]

or your pump is. I think you said you had a 255 right? You verified that pressure isn't dropping off?
Also 11.7 afr is not lean, you don't need it any richer.

I was having lean problems with my car too on my 24 lb injectors. I kept increasing fuel but still running lean 13:1. Turned out to be the pump.

you verified voltage to the pump?

[Aaron]

I'm going to side with Shaun here, there's no way you're maxing those at 5psi. I have flow matched 42.5s, with a Walbro 255 pump, and even at 15psi I still have enough fuel to go PIG rich (Rich enough to stop engine acceleration and boost build, I use it as overboost protection at 15psi). My engine is very similarly modded to your's in terms of VE changes, so I'd expect similar numbers and fuel requirements at the same boost. So I'm not sure what to say, but there's something else there.

[FieroWanaBe1]

Good news Jeff, Now I feel less than slightly retarded. But Im still to dumb to be finished.

[Shaun41178(2)]

will that crossover clear the slave?

[Aaron]

What trans is that?

You are aware the stock crossover clears the Fiero Getrag right?

[fieroguru]

What trans is that?

You are aware the stock crossover clears the Fiero Getrag right?

4 speed.

[FieroWanaBe1]

Its, a 4 speed, the stock crossover wouldnt clear the shift cables. I built it to clear the slave, it does, just barely, I will wrap both.

The welds are like boogers , but I'm poor ad cant afford good welds or a good welder. I'm getting better though.

[Emc209i]

I'm getting better though.

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