L8Apex

Has anyone done this conversion?

I have been talking to ANDIAL about their "S" and 3.8L conversion and it seems that both power and reliability are quite good. I am in the process of planning the future of my 3.6 and would like to keep it close to factory production and parts. So far, the ANDIAL upgrades seem to be the same as the factory except for the headers. Does anyone have any recommendations?

Sameer

The after market headers are lighter, shorter in length so if it's anything you should see power gains with the headers or at least the boost building up quicker, JMHO.

Geoffrey

My personal opinon is that the 3.8l conversion does not add that much and can introduce additional issues. There are two types of conversions, thin wall 3.8 which slip into the existing case bores, and the thick wall 3.8 that requires maching the case bore. My opinion is that the thin wall is too thin for turbo applications and I would not use it. The thick wall 3.8 requires case machining, and to do it properly requires o-rining the case to keep it sealed properly. I think the 3.8l reduces engine longevity for a little gain in torque. You will also have CIS fueling issues to contend with as well.

Sameer

Andials 3.6 to 3.8 conversion for turbo

ESTIMATE FOR COMPLETE ENGINE CONVERSION
3.8L from 3.6L 1994 S - TURBO

REQUIRED PARTS

Turbo S parts as previously listed
3.8L Mahle Piston and Cylinders, complete
Carrillo Connecting Rods
Lightweight flywheel and sport clutch assembly
Sport clutch disc

Misc. rebuild parts including engine and trans. Fluids

SUBLET WORK

Polish and Port Cylinder Heads, and balance components
including crank and rods. Install exhaust valve guides

LABOR

Remove and replace engine and transmission (not required if eng. shipped)
Power conversion including: rebuild engine to specification, blue print
for 3.8L specifications. Magnaflux oil pump, Dissassemble and reassemble clyinder heads, valve lapping etc. Upgrade turbocharger, change camshafts, install lightweight clutch assembly.

Install Sport Intercooler
Insall Fuel Enrichment System
TURBO "S" OPTION AND 3.8L ENGINE CONVERSION


OPTIONAL PARTS B & B Header System

OPTIONAL LABOR Polish case
Powder Coat Sheet Metal
Dyno Test Engine


Note 1-The C2 Turbo has a hybrid ignition system that combines traditional ignition with crank fire properties and cannot be converted to twin plug.

Andials S Package

1992 - 1994 Carrera Turbo S Package

Parts Sport Cams
Sport Intercooler (see note 1)
K-27 TurboCharger

Misc. Valve cover & exhaust gaskets, o'rings, hoses etc


Labor R & R engine and transmission
Install camshafts, turbochargers and intercooler

TOTAL "S" PACKAGE

Recommended Additional Performance Enhancements

Parts 1 Bar Boost Spring
Fuel Enrichment System


Labor R & R wastegate and install spring
Install fuel enrichment system

Note 1. Sport intercooler is sold on an exchange basis only

Sameer

L8Apex,

I'd go for their S Package to be on the safe side.

However I dont think the 3.6 turbo S came with a 1 bar spring, it came with a 0.9 bar spring. Geoffrey am I correct?

KeithC2Turto

L8Apex,

The Andial 3.8 with their recored intercooler (from the factory authorized S2 kit, but they cant say that) is my dream car.

It is not a big bump in displacement but when combined w the half point compression increase it should add well to the low to mid range.

I would stay w the .8 to .9 bar as 1 bar is to much with the biger compression.

I'd also have the manifold extrude honed to go with the best porting job possable.

However, for more power for about the same you could just go EFI if your existing P&C's are ok.

Still, I like the idea of a 94 3.8 CIS a lot. Very factory style & sellable latter.

To make a real killer CIS I would add mapable controles to the CIS & ignition system. I think Gumballa has a kit or the Racers Group Unichip can be added to the CIS for complet tunability of the A/F's and spark including management of the boost by RPM and launch control.

Using this approach you will be able to get the fuel you need using a combo of electronicaly reduced "control presure" and taking the O2 frequency valve to 75%. In the worst case, you may have to tapper the boost just a bit at higher rpms.

I'd keep the stock headers & keep your Fabspeed muffer setup or go to a custom Borla XR-1 muffler of 3.5" .

Get a C2 normal 2-5 gear set w a GT or Porsche Motor Sports limited slip for a truly maxed car.

Maybe a bit to crazy for most but few TT's will stand a chance if you can get the traction. Wow!

I want one!

Keith

L8Apex

Let the games begin! What turned into a valve guide job has turned into "while you're in there" job! I decided not to go with the 3.8l conversion. Instead I am going with the "S" conversion. cams/intercooler/Cylinder head rebuild (port and polish), 1.0bar of boost with tial wastegate, fuel enrichment, hks ebc, lightweight flywheel and last but not least c2 gears with a gt limited slip from vision motorsports (thx keith). I will keep ya posted on any updates and progress reports.

Teejae

What's the deal with the GT limited slip? Who are Vision motorsports? Are these an improvement over our stock 20/100's? Seems like I should probably change my lsd while I'm at it...it makes enough noise.

Adrian

Dear Sameer,
Have you prices to go with the description?
Ciao,
Adrian
964C4

ian c - u.k

why c2 gears ???
1 to 5 ??

L8Apex

ian,

The shorter gears make the power delivery & car quicker. (think 6 speed) However, it does reduce the top speed by 15-20 mph. Which is more appropriate for guys in the US that never see that end of our speedo.

C4TT

You are in California...
Give Protomotive a call.
They built the winning 996 turbo this month in European Car magazine!
They have amazing options for your car!

L8Apex

C4TT, I know Todd does some amazing work. However, I want to keep it close to factory "S" specs. When are you going to sell me your car? HEHE.

Sameer

Adrian,

No I dont have any pricing. Most of my stuff is from Ruf. The only thing from Andial I have is their fuel enrichment.