What would be the order of 930 engine mods you would do?

[scca_ita]

I would like to have reliable 400 RWHP ultimately. Can this be done progressively without wasting time and money? I want to still drive my car during the transition but slowly add/mod things over time if possible.

[BlkBird]

1) GHL Header & muffler
2) K27 7200 turbo
3) Kokeln intercooler
4) Fuel system upgrade (e.g. Andial Fuel Enrichment)
5) 1.0 bar spring
6) Upgrade K27
7) Replacement boost guage (remove clock)

[Emission]

What year is the 930? How many miles are on it?

The very first mods would be to make sure your fuel and oil cooling system are up to par before you start tweaking things. You don't want to be running lean, or have high oil temps, from the beginning.

[wcc]

I'm looking at the same thing. I have a totally stock '87 930. The first thing I'm planning on doing is the suspension. New shocks and bushings all around, lower to 25.5 rear and 25 front (is that too low?). Then align and corner balance the whole mess. Hopefully, I get that all done by spring.

Next winter my plans are to upgrade to K27 and larger intercooler and the 1 bar boost spring. Then an exhaust.

There are people here that know a lot more than me about this and I'm sure they'll chime in.....

[scca_ita]

Originally posted by Emission
What year is the 930? How many miles are on it?

The very first mods would be to make sure your fuel and oil cooling system are up to par before you start tweaking things. You don't want to be running lean, or have high oil temps, from the beginning.

It is a 79 930 motor with 19K on a total rebuild. It is going into an early tub with the 4 speed trans. Basically everything will be transplanted from the 79 930.

[scca_ita]

Originally posted by BlkBird
1) GHL Header & muffler
2) K27 7200 turbo
3) Kokeln intercooler
4) Fuel system upgrade (e.g. Andial Fuel Enrichment)
5) 1.0 bar spring
6) Upgrade K27
7) Replacement boost guage (remove clock)

Is item 2 and 6 redundant? If not what is the upgrade?

[BlkBird]

The K27 7200 was described to me as a very good turbo but not the best. With it Blkbird had 389 rwHP. Recently the turbo went to Florida for a specialty tweaking - change one of the housings, the blades, etc. Don't ask me for the exact details.

But now Blkbird hits 422 rwHP and is at full boost by 3800 rpm. So whatever magic was performed it worked out well.

[RarlyL8]

The order that I would add mods while using the car:
1) Exhaust System
2) Turbo
3) Intercooler
4) 1.0 Bar
5) Fuel Enrichment if needed (dyno to map A/F ratio to redline)
6) Go into the motor for cams and headwork if you still want more power.

[sand_man]

My car has or is getting the following during my total rebuild:
-B&B headers
-B&B intercooler
-3.4L Ps&Cs
-Twin plug heads
-Electromotive XDi twin plug ignition system
-Tial waste gate with .8 spring
-K27-7200 turbo
-ARP head studs
-ARP rod bolts
-SC cams
-Modified fuel head
-Zork tube "muffler"

I have no idea what kind of HP this will give me, I'm just doing alot of it "while I'm in there"...OF COURSE!!!!!!

[sand_man]

Originally posted by scca_ita
Is item 2 and 6 redundant? If not what is the upgrade?

There are many "variants" of the K27...K27s, K27HF, K27HFS, K27HF2, etc. The basic K27-7200 is what was used on the 965. The 930 used a 3LDZ. The basic K27 is deffinately an upgrade over the 3LDZ!

[slow&rusty]

I agree 101% with RarlyL8

Yasin

[Speedster94]

sell the 930 Engine , add another 5-6 K and get a 965 Turbo 3.6 , take the cat out , 1 bar Spring , and cams and you are at about 400 +very reliable HP . Before you reach real 400 HP with a 79 930 Engine you have at least the same Money spend , the car is barely driveable on the Street and you waste a lot of Time and nervs .
Harald

[RarlyL8]

Barely driveable? Are you nuts or have you never driven a 400HP 930?
These engines are more mild mannered than a normaly aspirated engine. Mine is downright docile until I kick it. At 400HP you can still use the stock CIS (if you wish).

[raceman]

first off get the valves adjusted and complete a full service/inspection. Start combing the net for deals on used performance parts and be ready to buy,Ebay is great for that. GHL? no thanks.Mid America has B&B systems for $1150.00,way cheaper then GHL and better IMHO(l`ve had both).Get the B&B`s made with a Garrett flange and $700.oo should get you a great Garrett turbo.Juan Ruiz can give you the good specs or l`ll give you mine if you like,basically a stage two Promotive spec unit.A custom full bay intercooler from "goingsuperfast" will cost you about $500.00.Do the CIS mods to keep the fuel ratios in line and make sure you`ve got the MSD or another ignition upgrade$250.00.l`d get a wideband system(PLX 250 with dash guage,$300.00)The stock wastegate is okay if it`s in good condish,if not search for a used 46mm Tial.For the muffler l`d go with the super trick "Aero " stainless topedo typeor a simple flowmaster.Shop it good and for less then $3000.00 you`ll have a monster.The next stage would require you to get rid of the CIS injection but cross that line when you need to,if you ever do.The parts that you`ll be replacing can be sold very easily to finance the mods,don`t worry.l sold my B&B headers and Autothority mass flow system to finance my own turbo conversion and it all worked like l planned it that way.PM me for any details on specific parts,l researched for a couple of years before l did my conversion and l`m pretty familiar with the process.l had a lot of time to plan as l first upgraded my suspension and brakes.good luck

[beepbeep]

Originally posted by Speedster94
sell the 930 Engine , add another 5-6 K and get a 965 Turbo 3.6 , take the cat out , 1 bar Spring , and cams and you are at about 400 +very reliable HP . Before you reach real 400 HP with a 79 930 Engine you have at least the same Money spend , the car is barely driveable on the Street and you waste a lot of Time and nervs .
Harald

I second this.

Also, for 500+ it's definately more economical to sell 3.3 all together and go the 3.6 route (preferrably by turbo-converting N/A engine to gain twin plugs, whick 3.6T doesn't have).

[hobieboy]

Originally posted by beepbeep
(preferrably by turbo-converting N/A engine to gain twin plugs, whick 3.6T doesn't have).

Goran, only challenge with this is lots of fabrication needed

scca_ita: how are you going to use the car? That will affect what engine internals you want/need. Without engine (e.g. cam) mods, I'm not sure if you'd get to 400rwhp... of course, each dyno is different

[Speedster94]

Originally posted by RarlyL8
Barely driveable? Are you nuts or have you never driven a 400HP 930?
These engines are more mild mannered than a normaly aspirated engine. Mine is downright docile until I kick it. At 400HP you can still use the stock CIS (if you wish).

I have driven 930s when you were running around the Christmas Tree in Shorts .
Have you ever driven a 3.6 Turbo 965 or a 993 TT , i guess not or you would know what i am talking about .

By Street Driveable i mean a Car would is driving smooth below 2000 RPM and has some power down there too . A car you can go from a dead Stop WITHOUT slipping the Clutch to death .
Back in the 80s there was nothing else and we had to live with that ,
I remeber very good how it was to drive trough the City
with a Car bucking like a Horse and flames out the exhaust that the Cop ask me if i want to Burn his Bumper ( i answered that i would like too ,man did i pay for that Joke )
By driving on the Street i am talking about the roads in Town wher you go 30 and have Stops and Traffic lights not inner City Highways ,there it shouldnt be a Problem .
Basic Line ,if you do that to a 930 Engine be sure you can keep it over 2500 RPM to enjoy , below it is a Pain .
Happy Holidays : Harald

[beepbeep]

Originally posted by hobieboy
Goran, only challenge with this is lots of fabrication needed

Actually, you would be forced to do at least as much fabrication on 3.3 to extract more than roughly 400hp. After 450hp, it's often not economically feasible to tweak CIS 3.3 and it's only engine core (crank, pistons, case and maybe heads) that can be reused.

[sand_man]

Originally posted by Speedster94
I have driven 930s when you were running around the Christmas Tree in Shorts .
Have you ever driven a 3.6 Turbo 965 or a 993 TT , i guess not or you would know what i am talking about .

By Street Drivable i mean a Car would is driving smooth below 2000 RPM and has some power down there too . A car you can go from a dead Stop WITHOUT slipping the Clutch to death .
Back in the 80s there was nothing else and we had to live with that ,
I remember very good how it was to drive trough the City
with a Car bucking like a Horse and flames out the exhaust that the Cop ask me if i want to Burn his Bumper ( i answered that i would like too ,man did i pay for that Joke )
By driving on the Street i am talking about the roads in Town wher you go 30 and have Stops and Traffic lights not inner City Highways ,there it shouldn't be a Problem .
Basic Line ,if you do that to a 930 Engine be sure you can keep it over 2500 RPM to enjoy , below it is a Pain .
Happy Holidays : Harald

I agree 100% with Rarely! My '87 is a daily driver...and hardly any of that daily drive is on an interstate! There's NO bucking. The car is very smooth. What I love most is it's split personality - docile, almost N/A like at lower RPMs and hairy chested when your foot is in it...not so much that the car is uncontrollable. Many have this perception that these cars have an agenda to take flight into the nearest oak tree as soon as one steps on the throttle - NOT SO!

[spooldup]

If using the 4 speed, dont forget the close ratio trans/ring & pinion.