After tearing apart my old QG with the spun bearing, I found that the intake manifold runners are reasonably sized, however I feel the exhaust ports are way too tiny! Seems to me that an engine can only take in as much air as can get out........................so I'm thinking about sending the head away and getting the exhaust side ported, probably just full port polish on the whole thing, and getting the intake manifold extrude honed and port matched.........................have to get larger runners on a header to let out the increase in air though. Any thoughts?
Sounds good, I think it will definately help. I will be interested in an NA setup when all the details get worked out...I think this engine has a lot of potential...maybe a custom header would be the way to go?
Our engine was designed for good MPG and emissions, not for power, but that isn't to say that it can't make good power. The ga16de was very restrictive, as the qg18de is too, but once the engine is worked on, I think the gains will be very nice. I remember reading a story a while ago about a guy who totally worked over the ga16de and ended up running low 15's or something like that, the same could be true for us.
I'm not so much looking to what 1/4 times I can get but seeing what kind of power I can get with stock compression and seeing if we can get more attention to the QG.
I'm not so much looking to what 1/4 times I can get but seeing what kind of power I can get with stock compression and seeing if we can get more attention to the QG.
Yes I know...but the general public likes to look at time slips as a mean of comparison....1/4 times don't mean much to me as I doubt I'll ever be at the strip with my car.
I'm sending out the head along with the intake manifold and some gaskets, going to get everything port matched, the headwork will be done with turbo in mind, so the gains won't be the same as an all-out n/a head job, but I'll also be looking into getting all new valvetrain made, springs, locks, retainers, etc. so QG guys, when the time comes, would you be down for a GB on it? lol.
Bob Legere found the same thing on the GA's intake to exhaust flow ratio was far from optimal. That is why I did head work on the GA. There is an article in the latest NPM about GA headwork, might be worth looking at just to see how the QG head compares to the GA in design.
yeah mike its best to just get this thing over with now i mean since the car went down and you have the head appart might as well make the second time around worth your while.....get that head ported cause we wanna see what that QG really can do.....
Bob Legere found the same thing on the GA's intake to exhaust flow ratio was far from optimal. That is why I did head work on the GA. There is an article in the latest NPM about GA headwork, might be worth looking at just to see how the QG head compares to the GA in design.
I've been meaning to ask you about this and the gains you saw.
The head looks to be pretty much the same as the GA..........I just think that even for bolt ons the headwork might yield some crazy gains...I mean, you could see how tiny those exhaust valves and ports were compared to intake.....wtf was the purpose of that anyways? LOL
I've been meaning to ask you about this and the gains you saw.
The head looks to be pretty much the same as the GA..........I just think that even for bolt ons the headwork might yield some crazy gains...I mean, you could see how tiny those exhaust valves and ports were compared to intake.....wtf was the purpose of that anyways? LOL
and the werid angles?
Mike
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