L31MaxExpress
I'm Awesome
OK so now I have an engine to work with.
My “old” G30 (91) engine I just pulled to put into my “new” G30.
The engine was misfiring on #5 even after new plugs and wires and had a pronounced lifter tic.
The plan is to put in a roller cam.
This is what I have:
- Roller ready
- 4 bolt main
- 2 piece rear seal
- Double roller timing chain
Block. - 14093638
Heads - 14102191
Intake - 14102182
Spares I could use:
- Heads - 110110810
- Intake - 10093015
- I’m looking for close enough to stock to minimize complications.
Questions:
1) Will I need to change the valve springs?
2) Will I need to change the distributor gear?
The 810 heads flow a little better stock for stock. Ideally you want to delete the valve rotators, install the approriate retainers and shims in their place and put a little stiff valve spring. I have used GM performance Z/28 springs on them. Saw they were on sale for under $3.00 a spring the other day.
I would use the Summit 8800 or GM 7395 cam for the high idle vacuum, smooth stable idle, and stump pulling low-midrange torque they make. Van's need a lot of torque to get them rolling, accelerate them and keep them rolling uphill and into a headwind especially loaded or towing.