Re: 2.89 in a 6 speed
Well one of my Reattae has a leaking freeze plug so is in the queue for the lift in front of the Crossie. Also planning to investigate a different exhaust system since it must come out to change the diff.
Have hopes it is enough (my initial planning was for a 2.67) but should help some. The difference in 1st at 4k is 3 mph (24 vs 21 mph) & at 70 in 6th, 2200 vs 2500.
In the exhaust since it is a single pipe at the collecor I see no reason to split back out to duals except to add weight, true duals might help for a high revving engine with a lot of cam overlap but that is not what we have here. In fact the 6000 rpm redline is 400 rpm less than my Jeep (DOHC 3.6 V6 290 hp @ 6400 rpm on 87 PON) but then the technology is from the last millenia. Not bad just not SOA.
So what we have is a relatively low revving engine that produces a lot of torque & should be built accordingly. To me that says a single exhaust to maximise scavenging.
Been searching a bit but have not found the cam specifications for inlet and exhaust valve opening/closing. Does anyone have those ?
Found this but nothing on the valve timing & would expect a 10:1 compression to produce 140-150 psi and not 100.
ps was great to meet Jim and he gave me some tips on changing the diff.
Last edited by Padgett; Jan 3, 2016 at 10:55 AM.