Experiences dropping 3S-GE cam into 3S-GTE?

Re: Experiences dropping 3S-GE cam into 3S-GTE? (Nik_Lee)

Thu, 14 Dec 2017 08:45:13 GMT

Ok thanks for the info guys, sounds like unless I were to get say aftermarket intake and exhaust cams as well as giving the rest of the valve train an overhaul its probably not worth changing my cams.
I was just interested to see if their may have been some easy gains to be had without going to in-depth overhauling the engine.

Re: Experiences dropping 3S-GE cam into 3S-GTE? (Admin)

Wed, 13 Dec 2017 16:44:12 GMT

YES - upgrading valve springs is essential. I learnt this the hard way. Extra lift + extra boost = deformed valves and seats.

Re: Experiences dropping 3S-GE cam into 3S-GTE? (Guest)

Wed, 13 Dec 2017 16:10:02 GMT

IMO If running higher boost, fuel to support, cams tuned/dialled in on a dyno, etc...
Intake cam 3sge gen3 manual (9.8 at 252) vs 3sgte gen3 (8.2 at 240) yes gains,
exhaust cam 3sge gen3 manual (8.2 at 236) vs 3sgte gen3 (8.2 at 240) no gain.

Gen3 3sgte was designed for the cams and rpm range. If you increase lift, serious consideration of upgrading the 20+ year old stock valve springs to match the lift, boost, rpm etc.

Check your head casting that the higher lift in camshaft doesn't catch.

The above redesign of an intake cam upgrade would be breathing more air in at a higher boost (lots of air in, chilled through your uprgaded intercooler to a nice 40 degrees), combustion :) and then trying to get the burnt fuel/air (at say 1,500 degrees) to escape at the same valve movement as stock (not going to happen). Challenge with that equation is more chance for recirculating exhaust gas (1,500 degree) not escaping the cylinder, that is bad news for engine temps regardless of your cooled intake temp and consequent deadly outcomes of longevity.

Re: Experiences dropping 3S-GE cam into 3S-GTE? (Nik_Lee)

Wed, 13 Dec 2017 14:24:32 GMT

Whilst Glen has resurrected the thread, are there gains to be had with the gen3 3sgte upgrading to gen3 3sge cams?

Re: Experiences dropping 3S-GE cam into 3S-GTE? (Admin)

Mon, 11 Dec 2017 19:18:24 GMT

Apologies for resurrecting this old thread. Do any of you have any gen2 3SGE cams in good condition that you would like to part with? I would like to try something.

Re: Experiences dropping 3S-GE cam into 3S-GTE? (Steve_A)

Sat, 30 Jul 2016 17:01:32 GMT

It's coming together slowly but surely! I have the block and head sorted for it now but I want to get my brakes, suspension and drive train sorted before starting on the engine transplant.

The next thing I need to address is some crunching going in to 3rd. Since the box was rebuilt 4 years ago I'm going to try new transmission oil (minus the friction modifiers currently used for the LSD) first and if that doesn't fix it then I'll get it rebuilt again.

In the mean time I've picked up some extra bits and pieces and I plan to have a bit of fun with them on the current setup to satisfy me in the mean time :)

Re: Experiences dropping 3S-GE cam into 3S-GTE? (5SGTE)

Fri, 29 Jul 2016 20:16:11 GMT

What's happening with your mac daddy build?

Re: Experiences dropping 3S-GE cam into 3S-GTE? (Steve_A)

Fri, 29 Jul 2016 17:43:09 GMT

I'll be getting a tune don't worry about that, more concerned with how much boost the 3sgte springs can take as I'd be running 20-25psi from a 3071.

I have adjustable cam gears too so that's sorted, it can't hurt to get the feelers out and make sure but it'll be nice if it's works out not needing anything else.

I think I see t way to much money on the 2 a long time ago, I'm committed now haha!!

Re: Experiences dropping 3S-GE cam into 3S-GTE? (5SGTE)

Fri, 29 Jul 2016 15:49:27 GMT

Steve's doing both by the sounds of it.

Re: Experiences dropping 3S-GE cam into 3S-GTE? (Guest)

Fri, 29 Jul 2016 14:21:17 GMT

The Toyota cams in comparison all come from the same blank, hence have the same numbers stamped on the camshaft, hence should have the same size of valve clearance (.15 to .18 from memory - online write up).
Therefore they should not need shim adjustment. However whilst it's apart grab the feeler gauge, and check cam clearance - last thing you want is high boost, high rpm and sim clearance not correct on one cylinder.
Camshaft timing (turbo to n/a in a turbo) makes a difference to fuel economy and power, get adjustable cams :) or modified or adjust by a tooth :)

There is the argument it's an old engine, replace everything with high comp, titanium and aircraft engineered products :) spend mega dollars for things you will never see .... wife will be upset but it's ok - lol - because you are a happy mr2 owner :)

Re: Experiences dropping 3S-GE cam into 3S-GTE? (just_ace)

Fri, 29 Jul 2016 13:55:43 GMT

The gen2 ge and gte use the same vlavle bucket setup. Tho you'd imagine the gte springs would be firmer.

I just dropped them straight in, didnt even need to adjust shims. The lift and duration increase is really minimal, you dont need to upgrade anything.

The big gains is from the timing. Im sure people running 264s and 272 cams have more overlap than these will give you.

I had a hiflow turbo with 14psi std ecu and a hks fcd. Pulled hard to redline unlike the suffocation at 5500/6000rm of the stock cams.

If you have the stock turbo im not sure how well it will flow in the higher rpm.

I may have a single modified stock cam gear floating around if you want to adjust the timing in the exh.

Re: Experiences dropping 3S-GE cam into 3S-GTE? (Guest)

Fri, 29 Jul 2016 07:12:03 GMT

Professional set up; You will need to measure all your valve clearances to ensure are within spec.
You need adjustable cam gears to do an adjustment off approx 4 degrees on the exhaust, as n/a and turbo run slightly different timing. You need a dyno to dial in and tune correctly - that is different for different boost levels.

Home mechanic set up; drop it cams, check valve clearance, run 4 degrees on the exhaust cam and it should be close to right. Check online guides for more details
It will run but the airflow won't be tuned to the boost levels you will be running (like having incorrect air fuel ration - it may run but it's not efficient on power/fuel).

Shimless and associated pieces for a built head give you lighter / stronger valves to work against higher boost levels, allows you to run higher rpm (higher rpm yields higher hp). Expensive some think, time consuming it is, but hp gains :) higher rpm

Re: Experiences dropping 3S-GE cam into 3S-GTE? (Steve_A)

Thu, 28 Jul 2016 22:09:42 GMT

Ahh ok I see, I don't think I'd bother going shimless since I don't think I'd be spitting shims with 8.5mm lift or am I wrong assuming that?

If I just drop the cams in then already have everything I need in the yard which is pretty appealing.

Re: Experiences dropping 3S-GE cam into 3S-GTE? (5SGTE)

Thu, 28 Jul 2016 20:14:48 GMT

Shim under bucket but isn't the 1zz shimless buckets? Pretty sure mine came from either a 1zz or a 2zz...

Re: Experiences dropping 3S-GE cam into 3S-GTE? (Steve_A)

Thu, 28 Jul 2016 19:33:58 GMT

Yeh I have my old gen2 NA that I'm parting out so the cams will be free. Looking to have a bit of fun with my current block while I get ready to put the new one in.

just_Ace did you use gen 2 cams in your with the stock springs? And if so what kind of boost did you run?

essdub, what do you mean by SuB conversion?