skylark
I'm Awesome
I used to be ok with the 6.5. Now I own a 104k 6.5 boat anchor. I do agree that the 6500 optimizer is better but I just simply can't justify the cost when there are better options for similar costs.
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I'll have to look up how to test the fuel pressure. I've done it on other cars, hopefully there is an easy method$25 fuel pump isn't worth the box it's in. Testing isn't a pain in the ass, it's good procedure.
If you actually have the granny low then your truck was optioned with the NV4500 which is a great transmission. ONLY use the recommended lube indicated on the side covers, otherwise known as "GM Synthetic Transmission Lubricant"
You can find gear/RPM calculators all over the net that will tell you your RPM's at a given speed with a certain gearset.
If you have 3.73's it shouldn't be a problem putting 4.10's in the rear, not sure about the front as I'm not a 4x4 guy.
Richard
That ultimate tbi mod seems like something I would lose patience mid-modifying and break the TBI unit.You can really wake up a TBI 350 with some minor mods. I wouldn't trade it in for a different truck until you try a few proven mods and see how it reacts first.
Ultimate TBI mod with adjustable fuel pressure regulator
radiator E-fans
fresh tune up with fuel filter, plugs, wires, dist cap/rotor, air filter, fresh oil, etc
do whatever you can with the exhaust while still being California legal like long tubes into an H-pipe then into high flow cats and dumped before the rear axle, all mandrel bent 2.5" with mufflers of your choice.
Gearing would be my last resort since its the most expensive but it would be a very effective solution to your problem.
I'll have to look up how to test the fuel pressure. I've done it on other cars, hopefully there is an easy method
Good to know about the nv4500, I was wondering about that after seeing all the nv4500 swaps done here lol
That ultimate tbi mod seems like something I would lose patience mid-modifying and break the TBI unit.
Exhaust is a good idea but somewhat pricey.
If I did though would a single 3" be a good size? Or would I lose too much back pressure? (time to search)
Yeah not a lot of options on the Cat in CA though
You can really wake up a TBI 350 with some minor mods. I wouldn't trade it in for a different truck until you try a few proven mods and see how it reacts first.
Ultimate TBI mod with adjustable fuel pressure regulator
radiator E-fans
fresh tune up with fuel filter, plugs, wires, dist cap/rotor, air filter, fresh oil, etc
do whatever you can with the exhaust while still being California legal like long tubes into an H-pipe then into high flow cats and dumped before the rear axle, all mandrel bent 2.5" with mufflers of your choice.
Gearing would be my last resort since its the most expensive but it would be a very effective solution to your problem.
With 87 octane, this will result in spark knock and knock retard, negating the timing bump. Graphed it on a scanner myself.bump timing to 4 degrees from factory 0 for 87 octane.