Engine Strength - Toyota Nation Forum : Toyota Car and Truck Forums

mr2slowtrd · 08-24-2004, 02:53 PM

Does anyone know how much boost the stock pistons, rods, rings, block, can hold stock. and also what pistons and rods would be good to put into the engine.

***MRQtwinturbo*** · 08-24-2004, 03:25 PM

with proper supporting mods (ie fuel mainly)...and proper tuning....stock motor should be good for 300rwhp....if u want to build ur motor...pistons..u can go with arias, JE, wiesco,etc....rods...best bang for buck would be eagle rods...

Lachean · 08-24-2004, 07:23 PM

The block can handle as much boost as the CT-26 can provide, while still operating in its efficiency range.

From what I hear, with supporting mods, the stock block can handle up to 400RWHP, by then you'll need cams and pistons to go any further...

JekylandHyde · 08-24-2004, 08:49 PM

I am currently over 350 RWHP on an unopened original engine with 198,800 miles. I assure you with proper tuning the OEM engine can handle much more.

Regardless of power, the OEM turbo (ct26 - should not be pushed beyond 15 psi of boost).

With a bigger turbo, the engine can handle a lot more boost.
I just did a 2.3 mile race this past weekend at 23.5 psi of boost.

As for good tuning, in addition to "proper fueling" I would add "proper intercooling".

wantamr2 · 08-24-2004, 10:14 PM

Funny you mention this, I was reading some old Sport compact car mags and had collected there 91 MR2 buildup. They were able to go well past 400 hp with the stock internals so I wouldnt touch anything unless you plan on getting more.

arcasmachineracing · 08-24-2004, 10:38 PM

Quote:

Originally posted by wantamr2
Funny you mention this, I was reading some old Sport compact car mags and had collected there 91 MR2 buildup. They were able to go well past 400 hp with the stock internals so I wouldnt touch anything unless you plan on getting more.

I think you are reffering to my friend Austin Tracy's Project MR2 build-up?

***MRQtwinturbo*** · 08-25-2004, 10:49 AM

read that article again and figure how out long that motor lasted before it blew up.....

JekylandHyde · 08-25-2004, 12:27 PM

The engine blew up because of a tuning error ~ not because they reached the limits of the engine.

You could blow up a stock turbo MR2 engine if you starve it of fuel under boost.

***Ratko*** · 08-25-2004, 12:53 PM

hmm.. isn't that how your motor blew Q? fuel starvation because of one of the injectors?

***MRQtwinturbo*** · 08-25-2004, 01:18 PM

my point being is that everyone thinks that 400rwhp is achievalbe on the stock block...sure the short block is there...add some aftermarket pistons..rods...arp studs..some cams..and a new intake manifold that you will need to get u past the 300rwhp barrier...how stock is that??....my clear definition of a stock motor is one that is untouched...unopened...top and bottom....

MR2Racer28 · 08-25-2004, 01:30 PM

Jeff has no aftermarket internals. He was also pushing over 300rwph with the stock intake manifold. my guess with proper tuning the 3SGTE can handle between 400-500hp.

JekylandHyde · 08-25-2004, 02:11 PM

MRQturbo, I am not sure what you are getting at.
My engine is 100% stock internals (top & bottom).
The head and block are original, untouched ... 198,800 miles.
Perfect compression.

351 RWHP, untuned with boost leaks.

wantamr2 · 08-25-2004, 06:31 PM

Quote:

Originally posted by arcasmachineracing
I think you are reffering to my friend Austin Tracy's Project MR2 build-up?

Well according to the article I have hear from the Nov 1997 SCC vol9 issue 11. The car had 433 crank horsepower and about 70 dyno runs to date. They just completed a 5,000 mile trip from Texas to Southern California and it was till running strong.