Building a high performance 3.1

[STE1991GrandPrix]

I'm new to the board but I have a lot of expierence working on engines.

 

I have a 1991 Grand Prix STE. I'm looking into building a new motor in place of the old stock motor.

 

The current thoughts are;

 

Rotating Mass:

Balance the rotating mass.

Find a lower compression piston for about a 8:1 Comp ratio.

 

Heads:

Complete port and polish.

New stronger valve springs if aplicable.

1.6 ratio roller rocker arms.

 

Internal Block (cam ect..):

Crower stage 5 camshaft (3000-7000 rmp).

New hydraulic lifters.

High flow oil pump.

 

Induction and exhaust:

Completely ported upper and lower intake.

NOS direct port nitrous injection (about a 50-75 shot).

Turbo-Charged with T3/T4 hybrid.

Custom 2.5 inch down pipe.

Custom 2.5 inch dual exhaust with Greddy mufflers, not cat.

Intercooler.

Complete cold air intake with 2 KNN cone filters.

 

Ignition:

MSD Coils on coil pack.

High performance Ingnition module if possible.

Possible MSD or Mallory ignition if possible.

 

If there are any sugestion or help out there that anyone can offer please let me know. I have been thinking about doing this for a while but have yet to find all of the parts to be able to. Let me know of any specialist or auto-parts store that may be able to help in this build.

 

I'm looking for about 400 horse power from the motor when I get finished (before nitrous even gets hooked up).

 

Thanks for the help that anyone will be able to offer.

Opinion or advice is all welcome.

Thanks again, Eric

[IBuiltMine-o1oo]

Hello! Thats a lot of thought already into it, but the first thing i can tell you is on the Turbo Grand Prix, the compression difference is in the heads. also if your going to do it.......... do it right from the start. the 3100 is a better engine, better desighned heads, and valve train and shit, and all of my looking around, now is leading me to a 3400. SAme thing as a 3100, but just a few minor, but good changes, like bigger valves, bigger exhast and intake runners and ports, d shaped ports etc.... so find like a 2000 3400 and start with that. It will pretty much bolt right in place of your 3.1 and run in the 3.1 computer, as soon as you find a place for map sensor instead of the maf.

Theres another thread on here about this, and ive been trying to get the same info, and if you dont word stuff just right they lock your thread. Go to the Turbo Grand Prix section and look around. theres good info on there about this.

[GP1138]

if you dont word stuff just right they lock your thread

 

Right. There's no "magic" way to word things so we won't lock your thread. If you ask a question that's been asked a hundred times already, we're going to lock it.

 

Search, search, search. There's tons of information on this forum.

[IBuiltMine-o1oo]

the more i look the more i find!

[slick]

FYI, save your money and keep the stock AC Delco Ignition stuff. No need for the MSD's, as GM's is good up to about the 500 hp range.

 

Porting intakes helps, yes, but to get the best out of it, you will want this Extrude Honed. This not only opens the ports, but also opens up the inside of the manifold as well.

 

Your heads are going to need worked over more than that, for that much power.

 

Like BuiltMine suggested, your better off buying a 3400 that will already gain you about 1 second and about 20-30 hp over your stock 3.1 as it is. Then, do those mods to that engine. It's a much better design, flows much better, etc....

 

Also, if your really serious about this, I would swap the intake and TB off of a 3500.

 

Sorry to say, but with the list you have right now, you'd be lucky to hit 275 with a 3.1.

[digitaloutsider]

Yeah, if you're hellbent on doing this with a 3.1, look into some of the stuff SleeperRedTGP has one. His car is impressive as FUCK. I would seriously consider attempting this with a 3.4 DOHC to be really honest with you. Not enough turbo'd ones..

[chadz34]

Yeah, if you're hellbent on doing this with a 3.1, look into some of the stuff SleeperRedTGP has one. His car is impressive as FUCK. I would seriously consider attempting this with a 3.4 DOHC to be really honest with you. Not enough turbo'd ones..

But, look at the ones that are turbocharged. :shock: :shock: :shock:

[z284pwr]

Yeah, if you're hellbent on doing this with a 3.1, look into some of the stuff SleeperRedTGP has one. His car is impressive as FUCK. I would seriously consider attempting this with a 3.4 DOHC to be really honest with you. Not enough turbo'd ones..

 

From what I gathered from the pictures he posted, its a 3x00. I saw what appeared to be 3x00 valve covers, and 3500 intake, so I would guess he did a 3400 swap and 3500 intake?

[GutlessSupreme]

so I would guess he did a 3400 swap and 3500 intake?

 

you got it.

[SleeperRed90TGp]

Yeah, if you're hellbent on doing this with a 3.1, look into some of the stuff SleeperRedTGP has one. His car is impressive as FUCK. I would seriously consider attempting this with a 3.4 DOHC to be really honest with you. Not enough turbo'd ones..

 

From what I gathered from the pictures he posted, its a 3x00. I saw what appeared to be 3x00 valve covers, and 3500 intake, so I would guess he did a 3400 swap and 3500 intake?

 

It's a 3.2, .040 over with the 3400 top end swap including roller set up with a 3500 UIM. By the times it turns it's about 320 HP to 350HP depeneding on who's formula you use.

 

If I hadn't had so much $ in my block I would have gone with a 3400 motor. If anything happens to this block I will put a 3400 in it.

 

As was said the 3400 is a better base to start with. Maybe 3500 will start showing up at the JY.

 

Jud

[z284pwr]

Yeah, if you're hellbent on doing this with a 3.1, look into some of the stuff SleeperRedTGP has one. His car is impressive as FUCK. I would seriously consider attempting this with a 3.4 DOHC to be really honest with you. Not enough turbo'd ones..

 

From what I gathered from the pictures he posted, its a 3x00. I saw what appeared to be 3x00 valve covers, and 3500 intake, so I would guess he did a 3400 swap and 3500 intake?

 

It's a 3.2, .040 over with the 3400 top end swap including roller set up with a 3500 UIM. By the times it turns it's about 320 HP to 350HP depeneding on who's formula you use.

 

If I hadn't had so much $ in my block I would have gone with a 3400 motor. If anything happens to this block I will put a 3400 in it.

 

As was said the 3400 is a better base to start with. Maybe 3500 will start showing up at the JY.

 

Jud

 

By saying in the block I'm guessing its a bowtie block? So a hybrid 3.x/3x00 eh, very cool I'm guessing any other specs your secret specs? *a.k.a. Rods/Pistons/Cam specs

 

And uh, here is your 3500

http://car-part.com/cgi-bin/search.cgi?userSearch=int&userPID=1000&userLocation=All+States&userIMS=&userInterchange=B%3D%40B&userSide=&userDate=2005&userDate2=2005&dbModel=15.19.1.1&userModel=Chevy%20Malibu&dbPart=300.1&userPart=ENGINE&sessionID=941&userPreference=price&userUID=0&userBroker=&iKey=&userPage=1

 

11 pages worth all throughtout the country, lowest price I saw was $495 I believe it was, this was just Malibu search

[SleeperRed90TGp]

Yeah, if you're hellbent on doing this with a 3.1, look into some of the stuff SleeperRedTGP has one. His car is impressive as FUCK. I would seriously consider attempting this with a 3.4 DOHC to be really honest with you. Not enough turbo'd ones..

 

From what I gathered from the pictures he posted, its a 3x00. I saw what appeared to be 3x00 valve covers, and 3500 intake, so I would guess he did a 3400 swap and 3500 intake?

 

It's a 3.2, .040 over with the 3400 top end swap including roller set up with a 3500 UIM. By the times it turns it's about 320 HP to 350HP depeneding on who's formula you use.

 

If I hadn't had so much $ in my block I would have gone with a 3400 motor. If anything happens to this block I will put a 3400 in it.

 

As was said the 3400 is a better base to start with. Maybe 3500 will start showing up at the JY.

 

Jud

 

By saying in the block I'm guessing its a bowtie block? So a hybrid 3.x/3x00 eh, very cool I'm guessing any other specs your secret specs? *a.k.a. Rods/Pistons/Cam specs

 

And uh, here is your 3500

http://car-part.com/cgi-bin/search.cgi?userSearch=int&userPID=1000&userLocation=All+States&userIMS=&userInterchange=B%3D%40B&userSide=&userDate=2005&userDate2=2005&dbModel=15.19.1.1&userModel=Chevy%20Malibu&dbPart=300.1&userPart=ENGINE&sessionID=941&userPreference=price&userUID=0&userBroker=&iKey=&userPage=1

 

11 pages worth all throughtout the country, lowest price I saw was $495 I believe it was, this was just Malibu search

 

Good find Brian. 500 for a 3500, not bad, gotta be low miles. I might even start looking here in houston. We only have a million JY. Ther is one in there with only 1 mile. Must be my son's car.

 

Mabe I should have said short block. :oops: Block is just a plain old block. Just happens to be a vin V, although no different from a T. I just spent a lot of time and money by deburring the block, about a day. shot peening, resizing and clearencing the rods and boring, pistons checking cam and crank bore, checking deck high and so on. Than balancing the whole works. It's a sweet little motor. Oh yea reground N/A crank, the ones that did mine made a mess out of it. Cam is stock 2001 3400 roller. The turbo is the trick.

 

Nothing really special although I do support it with very good ignition and fuellto keep it alive.

 

Jud