Stock RPM limit w/mega squirt 9k RPM

[mr2japan]

I want to know what it can take? I am thinking mega squirt. What can she take reliably, with gains?
I'll have Intake upgraded, and exhaust. That's it. 9k RPM?

:Toke:

[knightrous]

I'd say your going to need beefed up rods and valve train to handle 9000RPM on any of the 4A/3S/1MZ/3VZ/2GR setups. The stock motors probably won't make any real power up that high without some big cams and you might even have to look at the oil pumps and water pumps to see if they will handle that kind of abuse as well.

[Goldy]

Mass is your enemy when revving high, the top end is probably going to be a limiting factor initially, what engine is this on?

[snowtigger]

Valve train and rods will be the major things to go, forged rods uprated springs and valves maybe pistons all need weighing balancing as 90000 is high for a road engine in a car, bike engines do go higher but there well sorted.

[Tommytank]

Valve train and rods will be the major things to go, forged rods uprated springs and valves maybe pistons all need weighing balancing as 90000 is high for a road engine in a car, bike engines do go higher but there well sorted.

90000 is reserved for turbines only... ;)

[snowtigger]

I do apologise iPhone added a 0 I did see j lenno helicopter engined motorbike idled at 20,000 rpm and ran to 60,000 from memory I think would sound ace in an mr2.

[mr2japan]

4AGE is the motor. Thought I put that. Sorry.
So looks like we are saying all in the top end. Nothing on the bottom. So I should just buy a stock head, and have it worked out accordingly. Then pop in the mega squirt. Maybe a nitrous kit.

[Goldy]

4AGE is the motor. Thought I put that. Sorry.
So looks like we are saying all in the top end. Nothing on the bottom. So I should just buy a stock head, and have it worked out accordingly. Then pop in the mega squirt. Maybe a nitrous kit.

Have a look at :

http://www.twobrutal.co.uk/forum/showthread.php?11336-bike-carbs/

and the bible is :

http://www.billzilla.org/4agmods.htm

[snowtigger]

Build a twin charger then get the best of both worlds but be prepared for mega expense and serious headaches plus reliability issues.

[mr2japan]

Don't tempt me damn it. I always wanted a twin charged. Though I am thinking about pushing all motor 9k rpm still. Using this. Yes, rough idle is sexy since you know your fucked pulling up next to me at a light, or your not gonna suspect me at the highway.. Opps, what that NOS.. :b

Yes I wan't 9k rpm with some juice in addition.. Not to mention a nice tune with the aftermarket stand alone.

http://www.crower.com/camshafts/toyota-lexus/4age.html

http://www.crower.com/camshafts/toyota-lexus/4age/toyota-4age-4-cyl-twin-cam-price-per-pair-7207.html
Headers, dual exhaust, large cfm carburetor, performance ignition and increased compression of 10.25:1 and above is required. Cylinder head modifications would be beneficial. Close attention to proper ring and pinion gear set and tire diameter is imperative.

Build a twin charger then get the best of both worlds but be prepared for mega expense and serious headaches plus reliability issues.

[knightrous]

Yes I wan't 9k rpm with some juice in addition.. Not to mention a nice tune with the aftermarket stand alone.

http://www.crower.com/camshafts/toyota-lexus/4age.html

http://www.crower.com/camshafts/toyota-lexus/4age/toyota-4age-4-cyl-twin-cam-price-per-pair-7207.html
Headers, dual exhaust, large cfm carburetor, performance ignition and increased compression of 10.25:1 and above is required. Cylinder head modifications would be beneficial. Close attention to proper ring and pinion gear set and tire diameter is imperative.

Mate of mine has the Crower 285 cams in his 4AGE (Smallport bottom end, bigport head, ITB's, megasquirt).

[AlunJ]

Without cams (and valvesprings to match), headwork, high-comp pistons etc you won't see any increase in power on a 4age by revving to 9000rpm. They run out of airflow before they run out of revs as it is ;)

If you're looking at controlling the nitrous using the MS make sure to have the nitrous switch off a few hundred RPM before the main engine 9k RPM fuel / spark limiter kicks in. You don't want to see what happens when you hit ECU fuel cut on an engine with nitrous running. If anything nitrous drops the optimal gear shift RPM so it should rarely be an issue - but it's deffo something to be aware of.