5m-ge future engine mods?

[87hilux7mge]

[AustinHunter]

I did this back in the late 80's! The same still applies.

1. First, lighten your car as much as possible; AC compressor, heat shields, exhaust, etc.

2. Header back exhaust (not sure who makes headers now, but they are out there). don't buy an exhaust system - have a muffler shop do one for you - I used 2.5" pipe; get a really good free flow muffler.

3. Make sure you port match your head - intake and exhaust sides - to your header and intake manifolds and polish. This is important.

4. Ditch the fan, go electric, makes a difference on high rpms.

5. I never saw a difference with aftermarket coils and wires, but it never hurts. Indexing the spark plugs made a difference.

6. Build a new air intake hose assembly. Cut a hole out under the current air filter housing and run a hose down that faces forward under the lower spoiler - poor mans ram air or do a hood pop-up. replacing the intake from the airbox to the throttle valve - the resonator sucks.

7. Polish air meter box sharp edges and throttle body. There is an aftermarket TB you can get for the intake that is a bit larger.

8. Go custom pistons - .120 over to 3 liters and 10:1 compression (or more). factory rods are fine.

9. Valve springs are weak, I used shims to tigthen mine up - worked great.

10. Cams - not sure if you can still get reground cams (and according lash shims), but you can also order Japanese market cams.

I did all of this, plus suspension. I don't know what horsepower I got, but it was a fast as the late 80's V8 mustangs and handled much better.

If I was going to do it again? I'd probably drop in an American high rev, high HP, low/med torque small block.

[CanadianBak'inSupra]

cant wait to see when its done!!

[mechrider89]

Thanx for all the help guys! glad to see the forum a little more active. I'm just working on the brakes now then getting the car painted over the winter. I've been looking for after market calipers but was told there are none, anyone know what I can swap with? I got rotors and bearings but need calipers.
Also sorry for the late reply been working on the oil rigs so im not home much anymore.

[CanadianBak'inSupra]

je pistons and eagle rods are one hell of a good choice.
should make a pretty monster N/A build.

remember to shop around make sure your getting a good deal.

here is a great site:
http://www.suprasport.com/Internals_c_63.html

and if your lookin for cams ive heard nothing but good things from these guys:
http://www.gude.com/Products/camlist.php#toyota

[mechrider89]

Originally Posted by CanadianBak'inSupra

je pistons and eagle rods are one hell of a good choice.
should make a pretty monster N/A build.

remember to shop around make sure your getting a good deal.

here is a great site:
http://www.suprasport.com/Internals_c_63.html

and if your lookin for cams ive heard nothing but good things from these guys:
http://www.gude.com/Products/camlist.php#toyota

One thing I don't like about gude.com is they don't show the prices but I guess its not hard to ask.

[CanadianBak'inSupra]

540 for there cams and a 250 core deposit on the cams.
i asked 2 days ago

[mechrider89]

Well i'm finally movie forward on the supra a little bit, I ordered the new rotors and pads all around, just need to figure out why my wiper motor wont work now.......starting to piss me off because its going to be my dd very shorty as I'm parking my new car, and I need it for rainy days as I'm riding my motorcycle on the sunny days.

As she sits now:

Gotta finish removing the paint on the hood, prime and then repaint yet; so it looks like shit but oh well. Planning on having it read next month as my friend, little brother and I are making the drive to the open track event next month, Hopefully have some vids to post up after. The cars we'll be driving are 2000 bmw 325i (grey), 95 mazda miata (red), and my 84 supra (blue) should be a hell of a time!!

On a side note I got the talon shell its already been stripped cleaned and interior basically all re-installed, just waiting on the engine harness yet then it's time to drop in the engine and tranny. (tranny's actually in front of the supra in the pic)

[mechrider89]

Originally Posted by AustinHunter

I did this back in the late 80's! The same still applies.

1. First, lighten your car as much as possible; AC compressor, heat shields, exhaust, etc.

2. Header back exhaust (not sure who makes headers now, but they are out there). don't buy an exhaust system - have a muffler shop do one for you - I used 2.5" pipe; get a really good free flow muffler.

3. Make sure you port match your head - intake and exhaust sides - to your header and intake manifolds and polish. This is important.

4. Ditch the fan, go electric, makes a difference on high rpms.

5. I never saw a difference with aftermarket coils and wires, but it never hurts. Indexing the spark plugs made a difference.

6. Build a new air intake hose assembly. Cut a hole out under the current air filter housing and run a hose down that faces forward under the lower spoiler - poor mans ram air or do a hood pop-up. replacing the intake from the airbox to the throttle valve - the resonator sucks.

7. Polish air meter box sharp edges and throttle body. There is an aftermarket TB you can get for the intake that is a bit larger.

8. Go custom pistons - .120 over to 3 liters and 10:1 compression (or more). factory rods are fine.

9. Valve springs are weak, I used shims to tigthen mine up - worked great.

10. Cams - not sure if you can still get reground cams (and according lash shims), but you can also order Japanese market cams.

I did all of this, plus suspension. I don't know what horsepower I got, but it was a fast as the late 80's V8 mustangs and handled much better.

If I was going to do it again? I'd probably drop in an American high rev, high HP, low/med torque small block.

Thanx for sharing the the info man! I dont know if im going to upgrade the original engine anymore. I might just put and LS1 engine in her and swap the drive tran but we'll see whats cheaper! haha

[d557charger]

Hi,
I used to work as a tech at a Dodge dealership (haha, I agree - except for Dodges from right now and the ones from '64-'72).
Anyway, a tuning situation once came up and we were all divided about the fan issue. In my own research I found many many articles on the internet showing that an electric fan will nearly rob as much power as a clutch type mechanical one. Think about it, there's no such thing as free power, so to spin that fan, the alternator has to be robbing more hp to feed more electricity to the fan motor. Even if no power were lost going from mechanical => electric => mechanical power again the amount of power needed to spin a fan should remain the same. You may gain a few hp, like one or two (and that only well below the power band for the 5M), and it might improve your mph some... but I personally don't think it's worth the time, effort & jury rigging.

Either way though, no fan of either type can push as much air over the engine as traveling even at 15 ~20 mph can do, and electric fans cut out before that speed, and mechanical fans have clutches that slip out before 3,000 rpm (meaning a mechanical fan cannot steal hp when your engine is running over 3,000 rpm, unless the clutch is stuck), so it's kind of half dozen one way, half dozen the other ... IMHO

Anyway, this is my first post - I'm hoping to get a like new '85 Celica Supra in the coming weeks! It's been a while since I had a sports car so seeing the tuning ideas are welcome!