TT head differences between years - 3000GT/Stealth International Message Center

jandoaudio · 04-06-2008, 11:04 PM

I am trying to determine the differences and compatability between first and second gen tt heads and have gotten varying answers.

My understanding is that the CAS is mounted in different locations on 2nd gen heads than it is on first gen heads. That said, are there mounting points on both heads making them interchangeable or are they generation specific? If so, what is involved to convert from one CAS to the other?

I have a set of ported, polished, larger valve heads I would like to pull from my 92 to put on my 95.

Thanks for the help,
Clayton

EvanH · 04-06-2008, 11:11 PM

I thought the CAS was in the little area between the heads and had nothing to do with them? Unless thats the knock sensor. I think heads are interchangeable.

mitsuman3000 · 04-07-2008, 01:02 AM

Here is a link on what is involved on converting the CAS.

http://stealth316.com/0-frames.htm also this site has a LOT of useful info on it for our cars.

go to the "garage" section and look under "conversions" then "CAS"

jandoaudio · 04-07-2008, 10:10 PM

Quote:

Originally Posted by mitsuman3000

Here is a link on what is involved on converting the CAS.

http://stealth316.com/0-frames.htm also this site has a LOT of useful info on it for our cars.

go to the "garage" section and look under "conversions" then "CAS"

I never even thought to check jeffs page

Thanks, thats exactly what I was looking for.

Monster Stealth · 04-07-2008, 10:52 PM

It can be done, but if you run 92 heads on a 95 you have to use that year/style cam/crank sensors. I am running 91-92 heads in my 93.

mitsuman3000 · 04-15-2008, 05:49 PM

Quote:

Originally Posted by jandoaudio

I never even thought to check jeffs page

Thanks, thats exactly what I was looking for.

No prob, that's what the community is for

Patryn · 04-17-2008, 04:46 PM

I threw a set of 1st gen heads on my 1995, just used second gen internals, and made a bracket for the cam angle sensor on the drivers side. Other than that no problems swapping 1st gen heads to a second gen.

jandoaudio · 04-18-2008, 08:52 AM

My understanding from Jeff's page is that timing will be off a few degrees if I use the first gen CAS on my second gen ecu.

Patryn, what did you do for a bracket? I haven't had the heads side by side to compare them yet but I would assume its fairly simple.

Thanks again!

Patryn · 04-18-2008, 04:03 PM

Its not hard, just get a few pieces of aluminum or plate steel whatever, cut it weld to make a bracket. If I get the engine out of the car I'll snap a pick of my setup so you can see. Also, if you wanted to have a shop make a bracket for you they should probably be able to make one from scartch in two hours tops with both heads in hand.

04-06-2008, 11:04 PM	#1 (permalink)
jandoaudio Staying in the Family Join Date: Sep 2001 Location: Bozeman, Montana Drives: 95 RT/TT Trader Rating: (12)	TT head differences between years I am trying to determine the differences and compatability between first and second gen tt heads and have gotten varying answers. My understanding is that the CAS is mounted in different locations on 2nd gen heads than it is on first gen heads. That said, are there mounting points on both heads making them interchangeable or are they generation specific? If so, what is involved to convert from one CAS to the other? I have a set of ported, polished, larger valve heads I would like to pull from my 92 to put on my 95. Thanks for the help, Clayton __________________ 95 RT/TT Stock 92 VR4 Blacked out with a 98 conversion dr900's Stage 3 Heads 98 Jeep TJ 35's Locked with all the toys Cheap, Fast, Reliable.... You can only have two

04-06-2008, 11:11 PM	#2 (permalink)
EvanH 91 RT/TT Join Date: Aug 2003 Location: IN IRAQ! err PA Drives: 91 RT/TT Trader Rating: (0)	Re: TT head differences between years I thought the CAS was in the little area between the heads and had nothing to do with them? Unless thats the knock sensor. I think heads are interchangeable.

04-07-2008, 01:02 AM	#3 (permalink)
mitsuman3000 Forum Member Join Date: Jan 2005 Location: Paducah,KY Drives: 3000 VR4 & Talon TSI Trader Rating: (6)	Re: TT head differences between years Here is a link on what is involved on converting the CAS. http://stealth316.com/0-frames.htm also this site has a LOT of useful info on it for our cars. go to the "garage" section and look under "conversions" then "CAS" Last edited by mitsuman3000 : 04-07-2008 at 01:04 AM. Reason: added info

04-07-2008, 10:52 PM	#5 (permalink)
Monster Stealth Forum user Join Date: Jun 2001 Location: Fort Wayne, IN Drives: 93 VR4 & 99 A4 1.8T Trader Rating: (23)	Re: TT head differences between years It can be done, but if you run 92 heads on a 95 you have to use that year/style cam/crank sensors. I am running 91-92 heads in my 93. __________________ Performance 6G72 Rebuilt w/ 3SX Stage 3 Heads (+1mm intake/exhaust) - ARP Headstuds, Wiseco 8.5:1 Forged Pistons & Kevlar Timing Belt - TD04 9B - Greddy Profec B Spec 2 Boost Controller – Greddy Turbo Timer - SSQV BOV - K&N FIPK - Dejon Tool Y-Pipe - Dejon Tool Intake Pipes - OEM 360cc Injectors - IPO Hotwire Kit - EK2 Fuel Rail Loop – eBay 3” Downpipe w/ custom Flex Section - IPO UD Pulley – RPS MAXX Street Clutch - Maximal Xcase Bracket - MSD 8.5mm Plug Wires - NGK Copper Plugs - Maximal Performance Front & Rear Solid Motor Mounts - 3SX EGR Block Off Plates - Vac. Reduction - AC Delete – Cruise Control Delete - ProSport Gauges (Boost, EGT) - Odyssey PC680 Under Fuse Box Sitting in garage: EVO 560cc Injectors - MAP ECU - WRX 13T Turbos - Krank Vents - Walbro 255 Suspension/Wheels/Brakes OEM 17” Chrome Wheels – 245/45/17 Michelin XGT Z4's Sitting in garage: RSR Springs – Bilstein Struts – Maximal Adj Control Arms Exterior/Interior/Dress-up* Autometer 2x52mm Gauge Pod - 99 Rear Center Garnish – Weevil Custom Boost Controller/Turbo Timer Mounting Plate – Snake Eyes Delete Sylvania Silverstar H4666ST – Powder Coated Upper/Lower Intake Manifold, Front/Rear Valve Covers, Y-Pipe, Waterneck, & Alternator Bracket 6G72 Engine Manual - M-Spec Vac Reduction Diagrams - My Picasa Web Album

04-17-2008, 04:46 PM	#7 (permalink)
Patryn Forum Member Join Date: Sep 1999 Location: Walnut Hill, FL. Esc Drives: 3000gt VR4 Trader Rating: (17)	Re: TT head differences between years I threw a set of 1st gen heads on my 1995, just used second gen internals, and made a bracket for the cam angle sensor on the drivers side. Other than that no problems swapping 1st gen heads to a second gen. __________________ 1998 VR4: SS Downpipe, Borla Cat-Back, Open Element Air Filter, ACPT CFDS, DN Intake Pipes, Front & Rear Strut Tower Bars, Deftracing 575 Hood, Blitz DSBC, Vacum Redution, Krank Vents, KOYO Aluminum Radiator

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04-18-2008, 08:52 AM	#8 (permalink)
jandoaudio Staying in the Family Join Date: Sep 2001 Location: Bozeman, Montana Drives: 95 RT/TT Trader Rating: (12)	Re: TT head differences between years My understanding from Jeff's page is that timing will be off a few degrees if I use the first gen CAS on my second gen ecu. Patryn, what did you do for a bracket? I haven't had the heads side by side to compare them yet but I would assume its fairly simple. Thanks again!

04-18-2008, 04:03 PM	#9 (permalink)
Patryn Forum Member Join Date: Sep 1999 Location: Walnut Hill, FL. Esc Drives: 3000gt VR4 Trader Rating: (17)	Re: TT head differences between years Its not hard, just get a few pieces of aluminum or plate steel whatever, cut it weld to make a bracket. If I get the engine out of the car I'll snap a pick of my setup so you can see. Also, if you wanted to have a shop make a bracket for you they should probably be able to make one from scartch in two hours tops with both heads in hand.