Oversize valves for 3vze still available?
Aug 27, 2015 | 03:09 PM
#1
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Oversize valves for 3vze still available?
I'm about to build a new set of heads for the 3.slow and while i have located colt cams and they still have the specs for the sea2sky cams.. I'm not able to find any oversize valves, other than 1 seller on ebay... which makes me very nervous.
Anyone tried these ebay valves from titan-engines:http://www.ebay.com/itm/88-95-Toyota-3-0L-3VZE-OVERSIZED-Intake-Exhaust-Valves-/301404933827?hash=item462d224ec3
Or, know of any other oversize vavle options?
Anyone tried these ebay valves from titan-engines:http://www.ebay.com/itm/88-95-Toyota-3-0L-3VZE-OVERSIZED-Intake-Exhaust-Valves-/301404933827?hash=item462d224ec3
Or, know of any other oversize vavle options?
Aug 28, 2015 | 11:04 AM
#4
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Thanks Guys, Already checked with engnbldr.. not only did he indicate they don't have any oversize valves for the 3.0, but also that they never saw any gains from them, which contradicts a number of the posts i have seen [not from Ted, but from other members] on here.
I asked for clarification if he had any oversize valves available, but it does not sound like it. In the mean time i have ordered the ebay set and will have them checked out by whatever machine shop i end up going with for the head work.
It’s the same here, we did try producing OS stainless valves, did some porting efforts and cam designs, with very little results. In my opinion, the 3VZE, being primarily a big, heavy workhorse engine, it does not lend itself well to attempts at enhancement.
The best dyno runs we saw were not much past the error factor of the equipment.
Some do disagree, so just my opinion.
The best dyno runs we saw were not much past the error factor of the equipment.
Some do disagree, so just my opinion.
I asked for clarification if he had any oversize valves available, but it does not sound like it. In the mean time i have ordered the ebay set and will have them checked out by whatever machine shop i end up going with for the head work.
Last edited by mad_sb; Aug 28, 2015 at 01:25 PM.
Aug 28, 2015 | 12:44 PM
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I am pretty sure that the oversize valves you link to are standard size disc.
The oversize is to compensate for guide wear, not a performance feature at all.
The oversize is .008 in. at the stem diameter only. The rest of the valve is standard size.
This permits the existing valve guides to be reamed to restore factory clearances, so that the guides themselves do not have to be changed out in the heads.
Cheaper and quicker to just ream the guides to accept the oversize stems than to install new guides which would have to be reamed to fit anyway, even if new standard size stem valves were to be used.
The oversize is to compensate for guide wear, not a performance feature at all.
The oversize is .008 in. at the stem diameter only. The rest of the valve is standard size.
This permits the existing valve guides to be reamed to restore factory clearances, so that the guides themselves do not have to be changed out in the heads.
Cheaper and quicker to just ream the guides to accept the oversize stems than to install new guides which would have to be reamed to fit anyway, even if new standard size stem valves were to be used.
Last edited by millball; Aug 28, 2015 at 12:54 PM.
Aug 28, 2015 | 01:21 PM
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Crap,
Thanks a ton for the info though. I thought something was off from the specs.
Thanks a ton for the info though. I thought something was off from the specs.
I am pretty sure that the oversize valves you link to are standard size disc.
The oversize is to compensate for guide wear, not a performance feature at all.
The oversize is .008 in. at the stem diameter only. The rest of the valve is standard size.
This permits the existing valve guides to be reamed to restore factory clearances, so that the guides themselves do not have to be changed out in the heads.
Cheaper and quicker to just ream the guides to accept the oversize stems than to install new guides which would have to be reamed to fit anyway, even if new standard size stem valves were to be used.
The oversize is to compensate for guide wear, not a performance feature at all.
The oversize is .008 in. at the stem diameter only. The rest of the valve is standard size.
This permits the existing valve guides to be reamed to restore factory clearances, so that the guides themselves do not have to be changed out in the heads.
Cheaper and quicker to just ream the guides to accept the oversize stems than to install new guides which would have to be reamed to fit anyway, even if new standard size stem valves were to be used.
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