"Bandit" (2bandit)
06/19/2014 at 17:01 • Filed to: emma
1
12|
"Bandit" (2bandit)
06/19/2014 at 17:01 • Filed to: emma | 1
| 12 |
Can I run my qjet without this heatshield that sits between the thick gasket on the carb and the manifold? Something is sketchy with my shield because when it is on the car the engine runs like crap. I just tried running it without the shield and it ran beautifully. I'm going to assume the shield was causing a massive vacuum leak.
crowmolly
> Bandit
06/19/2014 at 17:02 |
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Yes. Do you have good gaskets? Does everything match up?
RamblinRover Luxury-Yacht
> Bandit
06/19/2014 at 17:06 |
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Seconding crowmolly: should be fine - extremely likely as a case of vacuum leak.
Party-vi
> Bandit
06/19/2014 at 17:07 |
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Er, you should have had a paper gasket between the intake and heatshield, and the 1/4" gasket between the heatshield and your carb. Most people elect to toss the paper gasket and heatshield and use the 1/4" gasket. If you mount the heatshield directly to 1) the carb or 2) the intake you're definitely going to have a vacuum leak, since the steel gasket isn't making a seal.
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Bandit
> crowmolly
06/19/2014 at 17:07 |
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I mean, I just rebuilt the carb. The rebuild kit included the big 1/4" thick gasket that goes from the carb to manifold, so that's new. The way my set up was originally arranged was: manifold, spacer, big gasket thing, carb. Now it's just: manifold, big gasket thing, carb.
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Bandit
> Party-vi
06/19/2014 at 17:09 |
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Ahh, there was my problem. My rebuild kit didn't include a gasket for that so I did assume the steel gasket made a good enough seal. So I am good to run just the 1/4" gasket only though?
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RamblinRover Luxury-Yacht
> Party-vi
06/19/2014 at 17:12 |
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You should try the speedo housing on a Rover - you set the tension on the output shaft of the transfer box by mixing up shims the shape of the housing and layering them. Paper gaskets exist, but usually aren't used, which means your seal is usually aluminum on steel xN on aluminum. lol wat is leak
Of course, that doesn't tend to leak as badly as the cork gasket on the transfer case bottom plate. Gaddam lunatics.
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Party-vi
> Bandit
06/19/2014 at 17:14 |
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You should be fine running the thick gasket. Do you know if you have a heat-crossover in your intake manifold/carb? Originally exhaust gas was supposed to flow up and under the Q-jet to give it better cold performance, and the steel heatshield was there to make sure your 1/4" gasket didn't burn up.
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Party-vi
> RamblinRover Luxury-Yacht
06/19/2014 at 17:15 |
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This is how I was supposed to set the shaft end-play in my Spicer 18 transfercase - adding metal shims until the end-play was within spec. I got everything aligned and sealed up with copper gasket spray when I realized I left a few shims out -__-
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RamblinRover Luxury-Yacht
> Party-vi
06/19/2014 at 17:17 |
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I also used copper spray gasket when doing the last one I did. We r genyus.
Philbert/Phartnagle
> Bandit
06/19/2014 at 17:22 |
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You can, but the heat shield is there to dissipate some of the excess heat from the exhaust crossover in the intake. If you blocked off the heat riser ports at the intake gasket when you installed the intake, then you will be fine. If you did not, then there is a chance that you will boil the gas in the carb which may lead to vapor lock or other problems.
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Bandit
> Party-vi
06/19/2014 at 22:37 |
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Would that be designed in the manifold casting or as a thing that bolts to the manifold? I'm running a stock piece right now with all the bolt ons removed (smog crap mostly).
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Party-vi
> Bandit
06/20/2014 at 08:22 |
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It's cast into the manifold - if you look at the picture above, the webbing between the intake runners is your heat crossover. Hot exhaust gases pass through & under the center of the manifold to heat the air coming in from the carb. I was imagining that your intake had an exhaust channel like this
See the grooves cut behind the primaries? That is the exhaust channel. It appears that your engine doesn't have this, so there's no exhaust gas actually running up under your carb, it's all just passing under the intake manifold.