What Head Gaskets to Use on 3.0 engine with 2.8 heads?
Now that I have finally completed the 403 swap on my 1985 Toronado, I have an empty engine stand which will soon be fitted with a 3.0 sourced from a 1989 Eagle Premier. With the helpful information from Bill and Farrar and a little additional research, I have confirmed that the valve timing difference between the odd-fire 2.8 PRV and the even-fire 3.0 PRV is the result of the timing chain that runs the fuel pump side cylinder head. (For the sake of simplicity of left / right references between rear engine Delorean as opposed to front engine Eagle, I will simply refer to the sides of the engine in terms of distributor side and mechanical fuel pump side.) Specifically, the Eagle engine uses the same timing chain as every odd fire PRV for the distributor side cylinder head. In contrast, the Eagle uses an Eagle specific chain for the fuel pump side! The reference points on the gears and the cams are the same. Even the procedure for setting the timing chains is the same between the Eagle shop manual and the DeLorean shop manual, the difference comes down to the reference timing links on the Eagle's center timing chain which runs the cam on the fuel pump side of the engine.
With regard to spark, I have opted to borrow Bill and Farrar's use of a cut-down AMC 4.2 distributor with a timing gear grafted from a stock DeLorean distributor.
In regard to fuel, I'm planning to utilize a fuel delivery system that has been successfully used by Alpine A310 tuners which consists of a Peugeot / Renault Alpine manifold modified to accept a Holley 390 4bbl carb.
However, since the 2.8 and the 3.0 use different head gaskets, this begs the question of what head gaskets to use when mating the 2.8 heads to the 3.0 block???
Any insight would be greatly appreciated!
Andrew
4194
5052
1 Attachment(s)
crankshaft position sensor
Quote:
Originally Posted by
Josh
Ill just relay the PM to this thread for future reference:
This is basically as everyone assumes going into a 3.0 swap haha. There is one issue and its is a big one... The crankshaft position sensor. It reads off a large ring mounted to the flexplate and is mounted to the eagle bellhousing. You will be removing both. Steve S (protodelorean) tried to weld this trigger wheel to his flywheel and cut a hole in the delorean bellhousing and mounted the CPS and he could not get it to fire. I asked him about this at DCS, as it is documented in his blog and he said he never measured so many times or double triple quadroople checked anything so much... like he went all out trying to line this sensor and trigger wheel up. And still no dice. So I didnt even bother. He had a full car as well.
If you did get it running you would be limited with upgrades. You could not tune for cams, porting, exhaust, intake, etc... Upgrading these things would probably lose you power as the computer would try to compensate and without remapping the spark and fuel maps it would run pretty bad. There would be no way to do any tuning to the eagle computer.
I posted a couple days ago " CA smog legal 3.0 motor swap" I was required to use the premier computer to drive the fuel injection, spark, EGR etc. I built a wheel out of an old cam timing disc I had laying around and welded it to the back of the crank pulley. Mounted the trigger on a small aluminum plate below it. Runs great. Important: wrap a bare wire aroundAttachment 57970 the trigger wire the full length and ground it, use it as a drain, it fixed a slight random missfire