are jspec engines good?
 

i was told that the guy i got my car from put a jspec engine in the car, i was just kinda curious of anyones exeriences.

Re: are jspec engines good?
 

I assume he was talking about a JDM engine? If so, it won't be any different than the engine you already have. Assuming you're talking about your '97 gst.

Re: are jspec engines good?
 

What about the cool cyclone intake!!!! ;)

Re: are jspec engines good?
 

ok sweet thats whats in it but i wasn't sure. some kid was trying to tell me j spec suck and are crap.

and what about a cyclone intake? ha i don't know a whole lot yet, im still learnin.

Re: are jspec engines good?
 

You don't want a Cyclone intake manifold or a JDM engine. You'd be better off getting a rebuilt engine from any of the local shops who sponsor our board.

Re: are jspec engines good?
 

if you really like the low-end power, i guess the cyclone IM is nice i guess but the 2g manifold works and like Kracka said, its better off getting the engine rebuilt. My honda friends still think swapping my engine for a "japan" engine will be better....?????!!! LoL

Re: are jspec engines good?
 

Cause it's jdm, it's better...duh..lol. Honda guys also think their cars are fast, they're a delusional group of people.

In some cases a j-spec or jdm motor, can be better in slight ways. Most times not. Stock usdm 2jz's make more power than jdm 2jz's...but dsm motors are pretty similar, and using a stock usdm 6/7 bolt 4g63 is cheaper, and pretty similar. J-spec is just a fancier way of saying, this is gonna cost a bit more.

Re: are jspec engines good?
 

No, just no. What he meant to say is, a 1g manifold will work just fine.

Re: are jspec engines good?
 

The only better jdm engine is a evo 3 engine
They have
510cc injectors
Bigger cams
Sodium filled valves
Mls head gasket
Evo3 16g turbo
Better exhaust mani and o2 housing
Better intake mani
Bigger t.b. over 2g t.b. also like a n/t t.b.
9:1 forged pistons
Ect
Other wise the 6bolts are all the same US and JDM. The cyclone intake is not worth any thing unleass you have all the parts to set it and make it work

Re: are jspec engines good?
 

^^well I learned something new today lol

Re: are jspec engines good?
 

Doesn't the head on the intake side collect at a different angle as well? Which is more ideal for making power than a normal 4G63 head?

Re: are jspec engines good?
 

ok, so where would i get a 1g IM that'll work with my 4g63? and what should i do if i wanted better interals like cams and rods?

Re: are jspec engines good?
 

2g's don't have as strong of connecting rods as 1g's do, but they have higher compression ratio pistons which are better. You can do a basic rebuild with 1g big rods machined onto 2g pistons. An advantage of this over forged internals is you don't get piston slap aka phantom knock.

The 1g rods / 2g piston set-up alone should be able to handle all the power you throw at it and then some, unless you plan on making 450+++whp on a Dyno Dynamics Dyno. However, many don't make that kind of power, so I wouldn't waste your money on fancy rods and pistons.

A 1g Intake Manifold can't be directly bolted onto a 2g head without port matching the intake ports of your 2g head to match the ports on the 1g Intake Manifold. A 1g Intake Manifold has bigger ports than the 2g Intake Manifold, hence the reason it's better because it breathes better.

I've never had a 7 bolt or 2g but I believe you can directly swap a 1g head onto a 2g 7 bolt, but I'm not 100% on that. While you are doing that you can swap out the cams for some after market HKS 272's and you should be ready to rock and roll. While you are in there it wouldn't hurt to replace or upgrade your valves, valve guides, retainers and springs. Although that is not needed to run HKS 272 cams. A Fel-Pro PermaTorque or OEM Mitsubishi head gasket are the way to go with some ARP head studs.

Do you have a budget and or power goals in mind?

Re: are jspec engines good?
 

well right now im just lookin into everything cause i don't know a whole lot, but im willing to spend the money to make things nice. i wouldn't mind making 350 to 400 horse, which i know i'd have to eventually upgrade my turbo setup, and get it tuned like crazy.

any estimates of how much it would be to do all that to the internals?

and what aout some uggestions for a turbo setup upgrade?

Re: are jspec engines good?
 

Forced Performance DSM68 is the hot street turbo out right now, it is basically a HTA 16g turbo that flows like a 20g turbo and can hold 30 psi to redline and runs for $1,000. 350whp would be pretty easy to hit with E85 and the right set-up on this turbo.

If you wanted something cheaper go with a MHI EVO III 16g, people on these boards have made well over 300whp and just under 400whp with this turbo on an E85 tune. Although it won't be able to hold 30 psi to redline like the DSM68 so your top end power will drop off. They run for around $550

Re: are jspec engines good?
 

ok sweet i'd be willing to spend the extra money for the dsm68.

and how would i do an e85 tune? i feel dumb but i have noclue what that is.

Re: are jspec engines good?
 

E85 is Ethanol, instead of 92 Octane pump gas. E85 requires using more fuel than typical pump gas so you would need at least 1000cc injectors if not 1350cc injectors. You would also need some sort of stand-alone program to assist in the tuning. I would recommend DSMLink and that runs around $600.

You would also need a 95 turbo EPROM ECU to swap with your NON-EPROM ECU. Then you would want to bring it to a local shop like DB Performance and have Shane dyno tune your DSM for you.

Re: are jspec engines good?
 

If you aren't familiar with forced induction or cars in general, I wouldn't just jump into making your car a street beast. I would keep it simple with basic upgrades at first and learn as you go.

Don't expect to slap a ton of bolt-ons on and tune it and never open the hood again except for an oil change. These cars don't work that way.

Re: are jspec engines good?
 

yeah i know, i wana learn my stuff as i go. im just lookin into it. im trying to learn what works and what wont for my car.

i don't wana be talkin out of my a**

Re: are jspec engines good?
 

so what an i do to learn about everything?