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Re: Building high MPG Motor for a 93 Vhevy Van
CatFish #325563 September 11th 2009 11:06 pm
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Thanks.
With a new TIGHT true roller chain set it will be what I set it for.
I am getting a lot of info and also on a chevy group adn they are saying that cam is a limp string adn I really should get a better cam.

But the cam makers all shift the RPM range up to give more HP, any know of a good cam that torques at around 2000 RPM.

Thr Crane Roller Tip are suppost to be the same as non rollers.

Well I though I had bought a Romulator but after 10 days and no show I started a protest with paypal...

I was going to roll my own...

Rich



Originally Posted by CatFish
BTW Rich, good luck with this project.
4 degrees is quite a bit and you'll already have an under drive, you'll run past the torque peak pretty quick. If I were you, I'd degree the cam with the stock set-up during assembly, compare that to the design specs, and then decide. You may be a degree or so advanced/retarded already, as the cams, gears and chain can sometimes be. You could also compare stock rockers to the roller tips in relation to valve lift.
What's your plans on the ECM programming?


Re: Building high MPG Motor for a 93 Vhevy Van
swimmster #325564 September 11th 2009 11:08 pm
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Where can I get the refulator kit??

That will be a help...

Rich


Originally Posted by swimmster
You can get a fuel pressure regulator kit that makes yours adjustable. or.. you can just modify it yourself. reducing or increasing the pressure will change how much fuel comes out per pulse width. this might fix your problem. I talked about the TBI due to the smaller bore size. the injectors themselves are the same i believe.. only times i've done this or seen it done was with carbs. far easier to turn a few screws than computer swapping and chip burning.. lolol.

Re: Building high MPG Motor for a 93 Vhevy Van
racprops #325575 September 11th 2009 11:57 pm
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Yeah..... I know I know.... It's NOT a van... But if you squint, It could be a REALLY long van?

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Re: Building high MPG Motor for a 93 Vhevy Van
swimmster #325601 September 12th 2009 10:31 am
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Awesome Swimm.... tanks! yay


Josh Souders
Performance Inc

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The voices in my head may not be real, but they have some good ideas!
Re: Building high MPG Motor for a 93 Vhevy Van
josh_performanceinc #325616 September 12th 2009 12:47 pm
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You should be able to drop your fuel pressure and get rid of your rich condition and stumble without the new computer or chip. I'd find a 305 throttle body though. the air velocity will really wake up the fuel mixture and you can use less fuel cause you will burn much more of what's going in the cylinder.


On a side note to the economy aspect of building an efficient engine. if you have headers, you can experiment with swapping your exhaust rockers with 1.6:1 factory rockers. they are out there.. just gotta remember what they were on or part numbers to order.

If you wanna be real different and you're gonona pop for a new cam, consider what they call a "4-7 swap" cam.. it changes the firing order and swaps the 4 and 7 cylinder in the order. this smooths out the motor believe it or not. it also gives it kind of that ford mustang 5.0 sound. TONS of drag racers running chevies run these cams for increased efficiency. why they are not much more widely available, i dunno.. only different setup you have to do is just once installed, swap the 4 and 7 plug wires at the cap.

Last edited by swimmster; September 12th 2009 12:53 pm.

Yeah..... I know I know.... It's NOT a van... But if you squint, It could be a REALLY long van?

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Re: Building high MPG Motor for a 93 Vhevy Van
swimmster #325620 September 12th 2009 12:58 pm
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I don't have all the details, but Alien in Canada has 2 tranny's slaved together, and by playing with the both of them, he gets 28 MPG @ 80 MPH.... He also has higher ratio's for Drag Racing and shift available...

OH yeah, the motor is a Blown 454

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Re: Building high MPG Motor for a 93 Vhevy Van
racprops #325628 September 12th 2009 1:21 pm
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Also over on the Third Gen thay are doing late model: a sequential fired motor and 4l60 control in one shot onto the older engines...

http://www.thirdgen.org/techboard/diy-prom/353405-sequential-injection-gen-i.html

Just in case your interested.

Rich

Re: Building high MPG Motor for a 93 Vhevy Van
Doc 2% of Canada, EH!!!! #325630 September 12th 2009 1:22 pm
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A BLOWER!!!IN A VAN??? STOCK DOGHOUSE??

INCREATABLE!!!

What tranies does he use?

Rich

Re: Building high MPG Motor for a 93 Vhevy Van
swimmster #325631 September 12th 2009 1:25 pm
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OK Very interesting so where do I find a 4/7 cam and do they do them in stocker cams...

RIch

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