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I was doing some reading on the sibling 2GR-FS and smokes there are a lot of different intakes available for these. Adapters for 60mm to 67mm 3UR TB, NOS intakes, headers, and everything else at a fraction the cost of our logo... lol Not that I'd spray it with this C/R but it could be entertaining.
For anyone never seeing the innards on the 2GR here is tear down for a spun rod bearing from an tracked MR2.
they wanted to know root cause so the tear down is unorthodox with them flipping the block while rods bounce around (heads on, caps off)....
Posting as perhaps a modified FS intake could be found as they application spans much further.
Look! A tightly wrapped bundle of joy!
So, how did they do? Does it look transplantable?
yes she does look transplantable ! I'm just awaiting for the cams to arrive so I can start this project , but all I can do at this point is he patient ! The time will come where I can start the process!
@Ultra4 where did you find the 1.65:1 rocker arm ratio and is it the same for the 350? Although highly unlikely, a tiny rocker arm ratio change of 0.2 and you gets from 9.9mm to 11.1 mm of lift with a spring change. That said, two of those points are fixed and moving the roller, not so easy unless something else exists in the Yoda Lexus line up... thinking outloud about other ways to skin the kitty.. .. ..
The 1.65 rocker ratio I determined by measuring my rockers themselves. I don't think it's very likely they used different rockers across the family--that's just begging for the dealership to screw up, esp with the carbon RROs--but I'll go ahead and put this on the list of 1000 or so things I'll need to cross-check when I have both engines on-hand.
Edit: Here, 20mm from valvestem to axis, 33mm from stem to lash adjuster. 33/20=1.65
Edit 2: well now I'm thinking the ratio's 1.538461538461538 because that's what 20/13 is...dangit, time to get back into that geometry mindset again...
Edit 3: NVM, it's 1.65 because 13 is 65% of 20
Edit4: if it isn't obvious yet, math is why I spin wrenches and am not an engineer...
Edit 5: FIGURED IT OUT. Went down and actually picked one up, I've been right about the 1.65 all along, the pocket side is the lash adjuster, the open side is the valve stem (technically stem cap/lash shim), which makes X=20mm and .65X the modifier, meaning X+.65X=33mm is our equation
This isn't enough detail for what we need to know but here are some of the basic specs...
Certainly nothing on the rocker arm ratio or any of that. But you can measure your cams with this detail here and see what kind of shape things are in when you pull that engine down.
Take a peak...
Looks like someone cammed a Lexus ISF. But i do find it suspicious that there was no information or details about the camshafts upgrade in the video. what do you guys think about this ?
Last edited by Polo2is350; 11-25-20 at 06:01 PM.
Reason: Corrections
Looks like someone cammed a Lexus ISF. But i do find it suspicious that there was no information or details about the camshafts upgrade in the video. what do you guys think about this ?
Thats serious chop! I also find it suspicious if there isn't any information. Not saying that Yamaha/are god sent but they killed it when it came to the valvtrain/head when they developed it. I wonder if that cam profile is actually better.
Hello everyone and great news! The MWR stage 3 cams have finally shipped ! I am assuming the cams will arrive in a week or so. I will update you guys when they arrive as well!
Hello everyone and great news! The MWR stage 3 cams have finally shipped ! I am assuming the cams will arrive in a week or so. I will update you guys when they arrive as well!
In regards to doing cams I am not sure what you plans are for intake area but I was reading elsewhere yesterday about someone who was experimenting with many things like a variation of intake plenum from many other 2gr-fe variations, although the intake plenum is not my point, the author of the page was also discussing things like throttle body adaptors to fit the V8 size throttle body from Tundra. it only gained marginal power however with the cams this upgrade with all others and tune SHOULD increase throttle response and would likely gain more than they did due to the increases of air speed and volume due to the cams, theoretically speaking of course. Look into it! I am sorry I cannot provide the link but it was mid 3 hour internet searches and I didn't save the link. Good luck with the project man, should it go well you may inspire other to follow suit!
In regards to doing cams I am not sure what you plans are for intake area but I was reading elsewhere yesterday about someone who was experimenting with many things like a variation of intake plenum from many other 2gr-fe variations, although the intake plenum is not my point, the author of the page was also discussing things like throttle body adaptors to fit the V8 size throttle body from Tundra. it only gained marginal power however with the cams this upgrade with all others and tune SHOULD increase throttle response and would likely gain more than they did due to the increases of air speed and volume due to the cams, theoretically speaking of course. Look into it! I am sorry I cannot provide the link but it was mid 3 hour internet searches and I didn't save the link. Good luck with the project man, should it go well you may inspire other to follow suit!
I actually looked into that and purchased an adapter from Underdog racing development to test out to see if we can use a Tundra's 76mm throttle body. The adapter fits our upper manifold with a little modification, that modification being removing a bracket that is next to where our oem Throttle body is located. I also got my hands on a Tundra's throttle body and it its almost identical to ours, aside the difference of 6mm in size but where the hoses connect is slightly different. The adapter is set to be for a 3.5L tacoma, but we can fit it onto ours.
The MWR Cams have arrived! I went with Stage 3 because why not?! Also I spoke with a Monkey wrench racing technician and asked since these are stage 3 cams would they have to be degreed, and I was informed that there is no degreeing necessary. I am assuming it's because these are regrinds.
I actually looked into that and purchased an adapter from Underdog racing development to test out to see if we can use a Tundra's 76mm throttle body. The adapter fits our upper manifold with a little modification, that modification being removing a bracket that is next to where our oem Throttle body is located. I also got my hands on a Tundra's throttle body and it its almost identical to ours, aside the difference of 6mm in size but where the hoses connect is slightly different. The adapter is set to be for a 3.5L tacoma, but we can fit it onto ours.
The heated plumbing is to prevent that one in a million situation where the flow rate and environment promote icing of the TB. IMO it is not necessary.
11-17-20, 06:38 AM
Another update!!
