PMO carbs or PMO ITBs for my 3.2 track appliance?

[Deadeye]

Looking for feedback on which way to go for my 911. Future plan is for twin plugs and higher compression as well as a new engine management set up, but for now stock motor w/ low miles, 964 cams, Wong chip and stock motronic management. Think bang for buck and reliability.

[Bob Kontak]

Just saying..........I drove my friend's GT3RS for eight 25 minute PCA sessions last fall and I was passed by a Maxima - several times - until the last few sessions. Then I finally smoked it! I made it bleed......... Stock Z3's were eating me alive the whole weekend.

I don't know your experience level but I would pass on the carbs until you drive better than your car can deliver. At that point upgrade to the heavy breather set-up.

[porschenut]

IMO, do it once, do it right. ITBs and engine management, preferably Motec.

[Jeff Alton]

Both work well. Carbs require less tuning initially than a complete EFI set up with ITB's. Since you mentioned bang for the buck I think they can be ruled out especially Motec...

No matter which way you go the biggest bang for the buck once done will be to change to a bigger cam profile.

The 3.4 with ITBs that I built a couple years back was a great motor, wicked throttle response, settled to idle everytime, no running issues at all, but we spent the time to tune it properly. Made around 325hp with a really wide power band.

Cheers

[Fishcop]

Check out threads frm Pelican "CruiseControl" he's done the PMO ITBs on his 3.2 Carrera.

[Deadeye]

Originally Posted by Jeff Alton

Both work well. Carbs require less tuning initially than a complete EFI set up with ITB's. Since you mentioned bang for the buck I think they can be ruled out especially Motec...

No matter which way you go the biggest bang for the buck once done will be to change to a bigger cam profile.

The 3.4 with ITBs that I built a couple years back was a great motor, wicked throttle response, settled to idle everytime, no running issues at all, but we spent the time to tune it properly. Made around 325hp with a really wide power band.

Cheers

So Jeff, I assume this means the ITBs will not work with the motronic engine management set up?

[Bob Kontak]

Originally Posted by Fishcop

Check out threads frm Pelican "CruiseControl" he's done the PMO ITBs on his 3.2 Carrera.

http://forums.pelicanparts.com/porsche-911-technical-forum/427451-my-pmo-itb-project.html

[lindy 911]

Bang for the buck = carbs. 50mm PMOs are under $5k brand new and will come damn close to perfect from Porsche Mail Order. You will not realize how good they are until you make other necessary changes like compression, ignition, exhaust and mostly cams. To make carbs work the cam has to have a healthy dose of overlap and considerably more lift. You'll need to do all that too with ITBs and Motec. I don't think ITBs will work with the stock brain; I could be wrong.

I have a 3.0 in a 2300 pound car that is considerably faster than a Z-3, let alone a Maxima, just say'n...

[Deadeye]

Originally Posted by lindy 911

Bang for the buck = carbs. 50mm PMOs are under $5k brand new and will come damn close to perfect from Porsche Mail Order. You will not realize how good they are until you make other necessary changes like compression, ignition, exhaust and mostly cams. To make carbs work the cam has to have a healthy dose of overlap and considerably more lift. You'll need to do all that too with ITBs and Motec. I don't think ITBs will work with the stock brain; I could be wrong.

I have a 3.0 in a 2300 pound car that is considerably faster than a Z-3, let alone a Maxima, just say'n...

I was hoping I could take it a bite at a time instead of dropping 15K all at once but maybe that's the only way to go. I'm getting 207 at the rear wheels now and my car also weighs 2300lbs. No such thing as cheap HP right?

[lindy 911]

Honestly, I don't think you need to spend $15K to make this happen. If you go with carbs you'll ditch all the stock ignition and induction which can be sold and offset the cost of the new goodies. Here's a SWAG budget;

Rod bolts $260
JE Pistons $950
Twin plug Dist $1750
Head work $650 (twin plug)
MSD (2) $570
46mm Webers $2500 (used)
Headers $750
Muffler $300
---------------------------------------
$7,730

This engine is probably worth 260 hp which is huge in a 2300# car!

[Green 912]

Bang for buck AND reliability = 993 based 3.6. Stick it in and go. $5K just for a set of carbs or $8k for an entire motor? Sell the existing motor and use the $ to offset the cost of the 3.6 and adaptation parts. Do it right and you end up with a better motor for less money and WAY less work. 993 motor in a 2300 pound car would be buckets of condensed fun. I stuck 278 bone stock drop dead reliable and drivable HP in a 2000 pound car.

[clutch-monkey]

Originally Posted by Green 912

Bang for buck AND reliability = 993 based 3.6. Stick it in and go. $5K just for a set of carbs or $8k for an entire motor? Sell the existing motor and use the $ to offset the cost of the 3.6 and adaptation parts. Do it right and you end up with a better motor for less money and WAY less work. 993 motor in a 2300 pound car would be buckets of condensed fun. I stuck 278 bone stock drop dead reliable and drivable HP in a 2000 pound car.

but often the life of the new motor is an unknown so you might be stuck with a rebuild shortly?

[lindy 911]

$8K for a usable 993? Please show me where.

[Deadeye]

Originally Posted by Green 912

Bang for buck AND reliability = 993 based 3.6. Stick it in and go. $5K just for a set of carbs or $8k for an entire motor? Sell the existing motor and use the $ to offset the cost of the 3.6 and adaptation parts. Do it right and you end up with a better motor for less money and WAY less work. 993 motor in a 2300 pound car would be buckets of condensed fun. I stuck 278 bone stock drop dead reliable and drivable HP in a 2000 pound car.

Probably the smart way to go. Good used 3.6 motors are avaiable for 8K as you said and I should be able to get around 5K for the 3.2