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Location:
Brisbane
Registered:
October 2002
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7M Cam Gears
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Fri, 11 July 2003 22:29
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Just out of curiosity, there are 3 roll pin locations on both the cams and cam gears on a 7M cam pulley. The centre one is in line with the TDC mark on the pulley. I'm curious what degrees the other 2 are at 90 degrees left and right. (I know they're offset obviously, but not how much)
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Location:
Lost in the K hole
Registered:
May 2002
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Re: 7M Cam Gears
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Sat, 12 July 2003 02:41
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only a degree or two max i think, just enough to compensate for belt stretch etc
fwiw dave, i can get you some custom alloy vernier gear inserts made for $200 the pair. ill need a set of stock gears to do it though. theyll net you about 20deg total adjustment
cheers
ed
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Registered:
August 2002
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Re: 7M Cam Gears
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Sat, 12 July 2003 09:20
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ED - can this be done with any cam gears 
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Location:
Lost in the K hole
Registered:
May 2002
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Re: 7M Cam Gears
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Sat, 12 July 2003 13:57
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| BlackSupra wrote on Sat, 12 July 2003 19:20 |
ED - can this be done with any cam gears
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yep 
but ill only do it for 'speshal people' 
pm or call me mate
ed
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Location:
Central Coast, NSW
Registered:
May 2002
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Re: 7M Cam Gears
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Mon, 14 July 2003 01:24
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Hi guys
I know a bit about car engines but really nothing advanced. I'm constantly on the lookout for things to improve my car's performance and was wondering what these vernier cam gears would actually acheive if i was to get some and put them in
I'm assuming that I could put them in myself I would then need to take them to a specialist to have them adjusted?
Would it be worthwhile doing at all?
I'm also running the NA cams in my 7M-GTE if that makes any difference (thanks ed )
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Location:
Brisbane
Registered:
October 2002
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Re: 7M Cam Gears
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Wed, 16 July 2003 08:12
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Thanks for the replies. As I said, it was just out of curiosity, I didn't actually intend using the other pin positions.
More Dumb question time:
1. Has anyone ever tried to fit dome top 5MGE pistons to a 7MGE (and yes, we realize they'd have to be severely fly-cut). The compression height is only .2mm different (if my poor maths is correct that's 8 thou). Yes, I also realize a 5M is a 2 valve. The bonus is they are the same bore, piston pin diameter, etc. Compression is our friend and I really don't care what kind of fuel I use (the more the better I say). Otherwise we'll go the Ed method.
2. There was a post here some time ago using Toyota Echo(?) buckets in 7M's, has anyone tried this yet? Am I correct in saying 4AGE shim/buckets are the same as 7M? Anyone know where to get shim under buckets for a "reasonable" price? I tried Oldmac Toyota (TRD dealer), $95ea for 4AGE ones (OK - my poor maths again but thats over 2 grand).
We're putting a new engine together - how fast is too fast on water?
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Location:
c'town, NSW
Registered:
May 2002
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: 7M Cam Gears
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Wed, 16 July 2003 08:39
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Dave:
1) Gut instinct tells me the valves will slam into the side of the dome good and proper. I can't imagine any degree of flycutting will right it. Of course, a dummy fit will give the definitive answer (and I have never done this).
2) The motor was actually a 1SZFE (never released in Australia) it had shimless buckets. They are 28 mm in diameter (just like a 4AGE and, more importantly, a 7M). I don't think anyone here has actually tried it, but you might want to read the tech article. I priced them and they were about $27 each. Still exxy but way cheaper than any TRD stuff, and you don't have to pay for custom retainers and shims.
Here is that tech article: http://www.club4ag.com/faq%20and%20tech_pages/Lift er%20Tuning.html
Cheers Dave.
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Location:
Brisbane
Registered:
October 2002
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Re: 7M Cam Gears
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Wed, 16 July 2003 09:09
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No, I wasn't actually on drugs suggesting this.
I was at the machine shop yesterday and asked were there any pistons from a different motor that would fit the 7M boosting it's compression. They only turned one page in the ACL catalog and found "5MGE". They reckoned the compression height was no problem, but I was a bit unsure. Hence the post.
I might give Toyota a call tomorrow with the part numbers off that site and see what they say.
Jumping in a boat with a parachute doesn't worry me. I once drove a pickle fork drag hydro with no helmet, no kill switch (probably no brains upon reflection). Kinda eerie at 100mph, with the engine noise fading away to nothing and not being able to see much of the boat. Just a whole lotta water and the wind.
The guys I reckon are freakin nuts are the jetsprint guys. Something isn't quite right about a boat with a roll cage.
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: 7M Cam Gears
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Wed, 16 July 2003 22:52
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| hydro wrote on Wed, 16 July 2003 19:09 |
No, I wasn't actually on drugs suggesting this.
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Never suggested you were!
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Location:
Brisbane
Registered:
October 2002
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Re: 7M Cam Gears
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Thu, 17 July 2003 06:16
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Sorry, just a joke as the idea seemed kind of extreme. Thanks for the info.
Dave
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Location:
Lost in the K hole
Registered:
May 2002
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Re: 7M Cam Gears
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Fri, 18 July 2003 05:29
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hey dave,
call me, ya bum!
errr, which dave? good question? hows about you BOTH call me
cheers
ed
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