Dudeman
Supporter
- Total Posts : 2589
- Scores: 259
- Reward points: 6112
- Joined: 4/7/2011
- Location: Dark side of the moon.
- Status: offline
Re:Gen4 3sgte or 2GR for an sw20?
Tuesday, December 27, 2011 3:48 PM
(permalink)
The damage doesn't look too bad to me, but cops and tow truck driver think that nsw stupid write off laws may see it written off. Not happy, I have been sorting, hoarding, buying, begging parts for over 18 months to get the interior looking very nice, it was about to be booked in for respray, and trd wheels on way. P plater was very sorry and said he was happy not to be thumped for doing such a stupid thing. No warning, just made a right hand turn in front of me. Its insured for more than I bought it for but I searched for a long freakin time to find a hardtop turbo, I dont want to be paid out, I want it fixed. Guess i'll find out soon. (edit) (Yes I shoud be thankful no-one was hurt, it was pretty close to being a head-on and that would have sucked)
|
MuMan
MR2 Scholar
- Total Posts : 701
- Scores: 20
- Reward points: 1681
- Joined: 4/7/2011
- Location: Bris. Qld.
- Status: offline
Re:Gen4 3sgte or 2GR for an sw20?
Tuesday, December 27, 2011 9:45 PM
(permalink)
How to do a 'unique' engine swap: Yamaha (Volvo B8444S) 4.4Lt 60deg (v6) quad cam alloy V8 315hp/325Ft/Lbs under 6000 rpm. Ultra compact, light weight (190Kg) transverse mounted V8 with detachable bellhousing and multiple transaxle options. Installed in the Nobel M600.. twin garret turbos deliver 650hp (485Kw) 0-60 mph 3.0 seconds.
"Have you ever noticed when things get set in motion, the heavy end wants to go first."
|
cogs
MR2 Deity
- Total Posts : 511
- Scores: 40
- Reward points: 5597
- Joined: 4/7/2011
- Location: Vic Australia
- Status: offline
Re:Gen4 3sgte or 2GR for an sw20?
Wednesday, December 28, 2011 0:27 PM
(permalink)
^ Looks like a Lego engine +1 to MRTurbo re 'G' engines, what were Toyota US thinking putting a 5S-FE in an MR2???? 1UZ-FE is a nice engine, but is still primarily built for economy. It'd have a lot more potential with a couple of 3SG heads on it. You can't compare two engines on power and torque figures alone, area under the torque curve gives a far more accurate indication of the car's final performance. A 2GR's fat torque band says it will eat a stock 3SGTE for lunch and be infinitely more drivable and economical.
|
just_ace
Moderator
- Total Posts : 2508
- Scores: 89
- Reward points: 4598
- Joined: 4/7/2011
- Location: perth wa Australia
- Status: offline
Re:Gen4 3sgte or 2GR for an sw20?
Wednesday, December 28, 2011 3:03 AM
(permalink)
Just a minor tech point, the beams 3sge heads are narrow angle. Yes you want a ge head, but valve angle has nothing to do with it. All modern performance engines will more than likely have a narrow valve angle.
|
cogs
MR2 Deity
- Total Posts : 511
- Scores: 40
- Reward points: 5597
- Joined: 4/7/2011
- Location: Vic Australia
- Status: offline
Re:Gen4 3sgte or 2GR for an sw20?
Wednesday, December 28, 2011 3:57 AM
(permalink)
That's an interesting point just_ace, and I've often pondered just exactly what Toyota's F and G designations actually mean. Are they specifically related to valve included angles, with some arbitrary threshold that separates them, or more to the design objective of the head? I suspect the latter, and your comments seem to support this. I was of the understanding that wide angle heads allowed better port design within the constraints of packaging under a car bonnet, despite not being quite ideal for modern high compression combustion chamber designs. I guess a V configuration engine is less confined in this regard, and more able to be configured ideally both in regards to port and combustion chamber design, particularly on the exhaust side. In terms of kW/l though, a 1UZ-FE is closer to a 3S-FE than a 3S-GE of similar age, implying it's still a predominantly economy biased design.
|
MuMan
MR2 Scholar
- Total Posts : 701
- Scores: 20
- Reward points: 1681
- Joined: 4/7/2011
- Location: Bris. Qld.
- Status: offline
Re:Gen4 3sgte or 2GR for an sw20?
Wednesday, December 28, 2011 9:26 AM
(permalink)
Interesting.. My take on this subject is narrow angle valve seats seal better and require less spring pressure while wide angle seats benefit from better flow characterists, cylinder quenching and mixture distribution. Multi-angle seats being a compromise between the two. I think it's more about port design as high port heads have a definate flow advantage in a n/a design. Cogs, hit the nail on the head as usual..area under the torque curve..could talk a lot on that subject.
"Have you ever noticed when things get set in motion, the heavy end wants to go first."
|
artymr2
MR2 Deity
- Total Posts : 1105
- Scores: 45
- Reward points: 7598
- Joined: 4/7/2011
- Location: WA
- Status: offline
Re:Gen4 3sgte or 2GR for an sw20?
Wednesday, December 28, 2011 10:51 AM
(permalink)
I dont think its the angle of the valve seats, but rather the angle between the valve stems that is being discussed. Cheers
Black SW20 GT Turbo T-top
|
MuMan
MR2 Scholar
- Total Posts : 701
- Scores: 20
- Reward points: 1681
- Joined: 4/7/2011
- Location: Bris. Qld.
- Status: offline
Re:Gen4 3sgte or 2GR for an sw20?
Wednesday, December 28, 2011 12:01 AM
(permalink)
Uhuh..makes sense. I guess thats a compromise between chamber shape, deck height, valve head size, cam profile and port spacing. Wide being wonderfull.
"Have you ever noticed when things get set in motion, the heavy end wants to go first."
|
just_ace
Moderator
- Total Posts : 2508
- Scores: 89
- Reward points: 4598
- Joined: 4/7/2011
- Location: perth wa Australia
- Status: offline
Re:Gen4 3sgte or 2GR for an sw20?
Wednesday, December 28, 2011 1:15 PM
(permalink)
yes it's just the angle of the valves in relation to the piston. narrow allowing a high/better shaped port and a direct flow path for air to go around the valve. if you look at the good honda heads you'll be able to see the whole valve face from the inlet port instead of the closer edge being blocked by the port floor. you won't have tight angles to the ports, better for flow, the heads will generally be taller to allow for the narrow angle and good port design, don't look at FE heads with narrow angle, they prob still have a bad port angle still anyway. in general this will allow larger valves, smaller chamber. valves are still in their relative positions to the pistons anyway. cam profiles etc i don't think are influenced so much by the valve angle as oppossed to the overall design of said head with castings/springs/buckets etc. i've seen much more aggressive cam profiles for beams narrow angle than non vvti 3s heads, prob due to the BT beams having larger dia buckets, but also the RT cams made by glenn are much higher lift/dur than what i've seen avail for gen2/3 3sge heads.
|