View Full Version : All-Trac Q&A

09-01-2006, 02:55 AM
found out a couple of things

I have a 6 "hole" exhaust many head casting number reads "11111 8838 1 YAMAHA"


09-01-2006, 03:15 AM
Wheres alltracman? He'll for sure know. ;)

09-01-2006, 07:17 AM
1st gen 3S

09-01-2006, 02:13 PM
god please tell me your kiding, how would I know if this is a 1gen 3s engine?

09-01-2006, 04:06 PM
the suspence is killing me

09-01-2006, 05:15 PM
Are you positive you have a 6 hole bolt pattern and that one of the studs isnt just snapped off? I would find it odd that someone would take the time to swap in a older motor. There should definately be another stud inbetween the two top ones.

09-01-2006, 05:17 PM
plus that would also mean you have an older turbo if the manifold is different. The turbo/manifold on the 1st gen 3s were single entry while all the following generations had a dual entry setup.

09-01-2006, 05:22 PM
Take some pics of the engine. I can tell that way. The valve cover won't say toyota and the pcv valve starts on the left side and a pipe goes across the valve cover.

09-01-2006, 06:02 PM
will do when I get home

09-02-2006, 01:31 AM
I stand corrected on you having a 9 hole manifold....
It definitly does look like you have a gen 1 3SGTE.
The turbo definitly appears to be a gen 1.
Note the water pipe coming out the front of the CRHA [Center Rotational Housing Assembly]. Only the Gen 1 turbo had this.
The Gen 2 had a plate there, and it is possible to bolt that onto one from a Gen 1, but there is no reason to...

That would DEFINITLY explain the IC not mounting up, and it being cut...

It's not THAT big of a deal.
You should still have the 92 wiring and ecu.
They probably blew the engine and swapped in a cheaper gen 1.

As far as I know, there are basically 3 "problems" with this.
1-lower C:R. Gen 1 is 8.5:1, gen 2 is 8.8:1.
2-single entry turbo.
3-The gen 1 has a different size cam journal in the head, so HKS cams and such for a gen 2/3 cannot be used. I believe there is at least 1 option for aftermarket camshafts the gen 1, but I'm not sure. Rob [MR. WOT] would know...

09-02-2006, 01:32 AM
If you want to know for sure, remove the IC and take a pic of the top of the engine with the ex man in it.

09-02-2006, 03:17 AM
woo hoo! great, time to start shopping for a 2gen 3sgte. are the mr2 3sgte's the same as the all-trac gt4 3sgtes?

09-02-2006, 07:25 AM
I don't see what the huge problem is. The engines are nearly identical, like Jeremy said. Worst case scenario, you have to get a 2nd gen head and turbo. The CR I'm not sure about...dunno what changed to bump up the compression.

09-02-2006, 01:30 PM
Um, the pistons changed.....

Also, the crank is different. The bolt holes for the flywheel are a different spacing.
So a different flywheel also.

But, the gen 2 crank will bolt in I believe, so no biggie.

09-02-2006, 03:30 PM
still the hood wont shut right, Il have to take the Intercooler off to see what else its hitting. Either way I cant drive it now and Id like to make it as original as posible, but all my money is tied up in this car and that 90 GTS that im still waiting for the tittle.

09-02-2006, 04:51 PM
So.... why don't you look for a gen 1 wta ic and get an aftermarket pump, heat exchanger, and put a fan on the heat exchanger. The stock 165 piece isn't a bad design at all, just the stock heat exchanger sucks and there is no shrouding to force air through it. I modded the heat exchanging system on my car to drop temps WAY down, but I'm still using the stock IC itself for the time being with no knock under 17psi ;) Everyone bags on the gen 1 but it has advantages, like a stock, large bore top feed fuel rail, and slightly lower compression. The only downside to have a 1st gen is locating valvetrain parts (especially if you want to go shimless bucket, need the buckets from a 1.2L Canada-only Echo as I recall). Aside from that it's a very solid engine.

09-03-2006, 01:20 AM
Gen 1 cams...