Well, I drove it...

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Bort62

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I rolled the 'chero out of the shop tonight to see if it would putter around the block.

I drove in in a few circles in 2nd around the parking lot... everything seemed to be working right.

So I got WAY too curious, and straitened it out and dug in.

WOOOOOOSHHHH!

Holy crap this thing sounds sweet. I didn't have my intake piping clamped on, and it popped off - but dammit I am addicted.

Now i've got to re-install the headlights so I can drive around w/o hitting anything, and see if I can get it to register boost on the gauge.
 
Bort62":11bi6kgy said:
ahh hell! I think I blew a headgasket already... lol.
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that sucks. you may want to consider making a top end picker upper thing like Will and Kelly have, so you can pull the top end as 1 piece and put it all back together quickly. I also seemed to have an issue with all of the flexing and twisting and boost with the new setup I kept popping couplers off, so I used a trick someone told me about and that solved my problem. I used sheet metal screws on the ends of the pipe because my piping is aluminum and I cant weld it. has held up so far... well 2 days of it when the tranny was working...
 
My piping is steel, and it's all welded.

Just did a comp check and I am 140 150 150 150 150 150 so I am in the clear there.

Could have just been condensate vapor coming out of the VC breather I guess.

In the daytime, when I can actually see, I was able to read my boost gauge, and I definitely hit about 7 psi in 3rd gear.

I knew it felt like it pulled harder :)

Now I've just go to figure out how to tune the damn thing...
 
Bort62":3h718had said:
I knew it felt like it pulled harder :)

Now I've just go to figure out how to tune the damn thing...
Click to expand...

Let the fun begin!

From someone who has replaced three headgaskets already, start with the timing. Nothing over 25 degrees total advance and DO NOT USE THE VACUUM ADVANCE if you do not have a BTM.

Can get into jetting the carb later.

Kirk
 
Even with my BTM i was havin trouble using the vac. advance...then we realized that the dizzy gear had eaten itself up and the cam gear was moving?!?!?!?!?!? Come to find out the little "key" hole to line the cam and gear up had wallowed out so now its off to the ole drawin board here. Ill tell you what tho, if u think 7psi was fun...try 20 :twisted: (please make sure to have an intercooler and some gooood gas and forged internals before tryin that tho LOL)
Matt
 
Well, right now I have two problems.

The first is that My mech advance is not advancing. I am stuck at about 10* total. It was working fine and then suddently stopped - so I guess the dist is coming out.

The second is I am getting some serious bucking and stumbling in low gear, and some surging in high gear. I think it is a float level issue as I didn't have this problem before I lowered the float.

I am being VERY careful with the timing. No Vac.
 
Took my distributor out (DSII) and could find nothing wrong with it. Perhaps I limited the mech advance too much when I welded it. It advances like 5 * or so now, but then after about 3k rpm it falls off. I haven't had a chance to get a real good feel for it as I am doing this by myself. Need someone to hold the gas and call out RPM for me.

However, can anyone give a good reason why the mech advance would advance to a certain rpm and then after that point fall back to initial?

At anyrate, I just bumped the initial up to like 23* and it runs a lot better. Not the most elegant solution, I know - but gets it driving for now.

I am starting to detonate @ about 10 psi now. Once I get this 6psi wastegate installed hopefully I wont have any detonation problems.
 
Use a boost controller, they are awesome and make it easier to change the boost up or down. Also, are u runnin an intercooler (doesnt sound like it)??? If not, seriously think about gettin one. Im runnin alot more boost now because of mine, before that i was severely limited and after one or two good fullo throttle runs I would get bad heat soak. As for the bucking, mine did it really bad and some float level changes, some tweakin with fuel pressure and jets and timing it finally went away lol...i know its a broad answer but it just means that some good tuning will make it go away. OH...do you have a wideband??? You need to get one for sure, helps keep and eye on air/fuel and can answer some tuning questions. Best of luck!!!
Matt
 
Thanks Matt - I am working up to it step by step.

I just installed a MSD 6AL I had sitting around. I don't know if that made any real difference but it runs ok. At least now I have a rev limiter.

Right now, it is totally drivable. There is some hesitation accelerating that I need to figure out, but that is secondary to getting a wastegate installed. Right now I have to let off manually to control boost and that is really limiting things. I think my bucking problem was timing related, because when I advanced it a little, it got a lot better. I have to re-set the float down a little because fuel is leaking out of the carb again.

I'm not so worried about a boost controller, manual (changing a spring) will be fine. I don't have an intercooler, and I understand that is a limit. However, I am only trying to run 6psi of boost so I don't think it's that big of a deal. When I get this setup running well I will probably put an IC on and start increasing the boost.

Biggest unknown for me right now is why my mech advance is not working properly. I get about 3-5* of mech at mid RPM, and then above 3k or so it falls back to the initial. I am fairly new to messing w/ distributors like this so I don't have a lot of experience to rely upon. It was working perfectly (10* advance) but something changed. I took the distributor apart and everything about it seems normal... While I was in there I locked out the vac advance just to make sure that wasnt moving around. In order to get it to run "right" (better) I had to bump to ~20 initial
 
Are u runnin a vac. line to the dizzy (i think i read that you werent but I wanna make sure) cause that made my timing do silly things when we were tuning. As for the wastegate/boost controller, you can get a cheapo controller for like $15 online and itll work like a champ. Right now I have a dual valve that allows me to dial in low and high boost at the flip of a switch. Even if your only lookin to run 6psi, its nice to have, that way if somethin happens and you have to run on cheapo gas, you can dial it down, or if you get an itch to bump it up a bit, u can do so in a couple seconds.

The bucking/hesitation very well may be timing related. I had a nasty hesitation on initial throttle, when you first went to floor it, it would bog, pop then take off. Then up top it was pulsing real bad and we found the wastegate to be the culprit. Anyways, keep us posted...and post some pics!!!!
Matt
 
I stuck around work until 2:00 am last night in order to get my Wastegate flange welded on. With the way I have the turbo crammed in there, I have to undo the passenger side motor mount and lift the engine to get the turbo out - which is necessary to get the exhaust manifold off (which requires removing the starter and the alternator).

The joys...

At anyrate, I welded a 35mm external wastegate flange onto my manifold (oh how I love welding shtty cast iron) and it all seems to fit. I still need to tie the outlet of the wastegate into my downpipe, but I need to find some 1.5" pipe for that.

Of course, when I fired it up to see if it was all sealing - the carb totally overflowed. I think I might have a collapsed/sunken float. That will have to wait until Monday.
 
What carb are u using??? Do you have a nitrofill float? Search around and you find info on those floats, they wont collapse under boost.
Matt
 
It's a YF - and AFAIK, no nitrophyl float is avaliabe.

I would love to find one... I had to modify my brass one and it is entirely possible it gave up.
 
Bort62":1cfi54rc said:
It's a YF - and AFAIK, no nitrophyl float is avaliabe.

I would love to find one... I had to modify my brass one and it is entirely possible it gave up.
Click to expand...

what did you do to "modify" it... I cant remember where I read what you have to do.

found something...

"3) Use expanding foam to modify existing brass floats. This involves drilling a couple of holes into the floats, filling the floats with the expanding foam, and then sealing the holes with a petrol resistant epoxy or plastic fuel, to prevent fuel from seeping into the float."
 
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