420a 60mm Throttle body

[Jeff99GS]

I want to purchase a 60mm throttle body for my Non turbo eclipse. I see one made by Modern Performance, its' a billet 60mm TB with half shaft. Has anyone else used this Throttle Body? I want to know if it is any good. Is 60mm the largest size TB you can get for the NT?

 

[BigRand]

Just buy it and put it on, you'll love it.

P.S. 60mm is pretty big for our intake mani's anyways, I havnen't measured the opeing for the intake manifold but its not as big as other cars.

 

[VelocitàPaola]

The opening on the intake manifold is 53.5mm across.

So... what exactly does that mean? You'll need to port-match the intake manifold to benefit from any TB bigger than about 52mm.

So far, 60mm is the biggest TB I've heard of for our cars.

 

[Jeff99GS]

Yeah I was definately going to port out the mani opening to 60mm aswell. I want to get an OBX manifold soon. Am I wasting my time with the big TB and stock manifold ported to
60mm opening? What should come first the new manifold or the new throttle body?

 

[VelocitàPaola]

Why do you want an OBX intake manifold?

 

[Jeff99GS]

Well I dont really want an OBX but that was just what I saw for a good price...what kind of intake Manifold should I get....Do I even need a aftermarket one? I'm still only running 8psi, but I just love adding new parts to the eclipse. I was ordering my blue 10.3mm ignition wires and I saw the 60mm throttle body and I thought that may help me spool up a little quicker....I have an AUTO so I need all the help I can get in the spool up department

 

[VelocitàPaola]

I was ordering my blue 10.3mm ignition wires and I saw the 60mm throttle body and I thought that may help me spool up a little quicker....

. You need all kinds of help. If it isn't too late, get your money back for the ignition wires. Those should only be something to consider once you're at the point that you need to eek out another 1/8hp because you're already at 1,000hp.

The throttle body is a nice idea, but it won't help you spool any quicker... it'll just help the engine breath a little easier. If you don't have the funds, I would get the stocker bored to 55mm. 60mm (or a Jeep TB) TBs are nice, but probably most beneficial when you're making a good deal more power.

Granted, the stock intake manifold isn't all that great, but that doesn't necessarily mean the OBX IM is any better. Most people opt to ditch those shottily made mani's when they turn up the boost because they're outright afraid of them breaking.

My ideal intake manifold would be the stocker, with the inlet and runners port-matched to the TB and head. It would have a 0.5" phenolic spacer and the whole thing would be aggresively extrude honed. Then I would tap the EGR inlet for a brass plug (best EGR block-off in my opinion), and drill and tap several more holes for extra vacuum/boost sources.

I think that'd be about the best you can do given what's available as far as aftermarket parts. If there were a 420A version of the Magnus, or something else that actually had some R&D put into it, then I might consider that. But between the thin-walled, welded OBX intake manifold, and our thicker-walled cast stock manifold, I'll stick with the stocker.

Now... if you want to spool up quicker, you'll need an EMS with an anti-lag feature, a built bottom end (2.2L or 2.4L are a plus), and nitrous.

Honestly, unless you have a built engine, the only way you can reduce spool time is to get a smaller turbo.

 

[Jeff99GS]

Well the only reason i got the ignition wires is cause my car is blue and I have yellow wires now. I guess Its a stupid reason but I just want everything to be blue. As far as the spool goes. its not really that bad, I just figured I can do a few things to try and help. It starts spooling about 2500 and hits full boost at 3000-3500.
I haven't taken the car to the track yet but she feels alot faster than what I was used to with that car! Anyway I am going to NOPI nationals at Norwalk raceway on the 14th and 15th I will let you guys know what I'm running. I am going to do a couple passes with just the Turbo and then a couple passes with the nitrous off the line for 1.5 second! I hope its faster than a 15.0

 

[Jeff99GS]

My ideal intake manifold would be the stocker, with the inlet and runners port-matched to the TB and head. It would have a 0.5" phenolic spacer and the whole thing would be aggresively extrude honed. Then I would tap the EGR inlet for a brass plug (best EGR block-off in my opinion), and drill and tap several more holes for extra vacuum/boost sources.

So would a Machine shop Hone the Manifold? Whats a Phenolic spacer? does that go in between the Throttle Body and Manifold? What is the reason for tapping the EGR inlet? I didn't think I needed more Vac/Boost sources.

EDIT. I see what you're saying....Tap the EGR inlet hole for a PLUG, and drill and tap more holes in the mani for extra VAC Sorry I'm a little SLOW

 

[VelocitàPaola]

So would a Machine shop Hone the Manifold? Whats a Phenolic spacer? does that go in between the Throttle Body and Manifold? What is the reason for tapping the EGR inlet? I didn't think I needed more Vac/Boost sources.

EDIT. I see what you're saying....Tap the EGR inlet hole for a PLUG, and drill and tap more holes in the mani for extra VAC Sorry I'm a little SLOW

You'd need to find a specialized machine shop that has the equipment to extrude hone.

Phenolic spacers either go between the intake manifold and the head, or the lower and upper portions of the intake manifold. They're basically insulators that prevent heat transfer (thus helping keep the incoming air in the plenum cooler). I'm not sure if anyone makes these for our cars anymore (I know Corbin used to). I have a the flange drafted in AutoCAD, so it wouldn't be hard to get one made as long as you could find a place with a water jet and some phenolic Garolite.

 

[4UH8ERS]

Paul, how about we all donate some upper/lower intake manifolds to you. Then you find a machine shop that can do an aggressivly extrude hone and can make some spacers. then do the regulars like port the runners and bore the intake side to 60mm. they might give you a deal if you get like 10 done at the same time. Then you can sell them back to us and 2gnt and make profit!!!

 

[VelocitàPaola]

Paul, how about we all donate some upper/lower intake manifolds to you. Then you find a machine shop that can do an aggressivly extrude hone and can make some spacers. then do the regulars like port the runners and bore the intake side to 60mm. they might give you a deal if you get like 10 done at the same time. Then you can sell them back to us and 2gnt and make profit!!!

Thanks for the sarcasm... I was just saying what my ideal intake manifold would be like...

In case there was just an iota of sincerity there, I was thinking about picking up where Corbin left off and making a few phenolic spacers for the 2GNT community.

 

[4UH8ERS]

Actually, I was completely serious. i would want one.