Off-Road Carb Trouble...

[BizeeB65]

I am running a 1406 with an off-road kit in it, and an adjustable fuel pressure regulator... my truck stays running as long as I am on the gas going uphill. Granted, TBI would be better, but for a baller on a budget, my setup works just fine.

 

[sta500666]

I am running a 1406 with an off-road kit in it, and an adjustable fuel pressure regulator... my truck stays running as long as I am on the gas going uphill. Granted, TBI would be better, but for a baller on a budget, my setup works just fine.

I didnt have the option of going up a hill full throttle last weekend... it was steep and 3 teared, haha I woulda royally F'ed up my truck! I need something I can go whatever speed I want to with.

 

[Chaddy]

I didnt have the option of going up a hill full throttle last weekend... it was steep and 3 teared, haha I woulda royally F'ed up my truck! I need something I can go whatever speed I want to with.

Then you should start looking for a TBI set-up from a junk yard or paper.

You will need an intake, computer, wiring harness, and an external fuel pump.

 

[BizeeB65]

I didnt have the option of going up a hill full throttle last weekend... it was steep and 3 teared, haha I woulda royally F'ed up my truck! I need something I can go whatever speed I want to with.

I never said anything about wide open throttle, or consistant graded inclines, now did I....

 

[vortec]

$500 for a Q-jet? I'm sure there are many companies offering modded/rebuilt q-jets, but I am still running the Q-jet that came stock on my truck.

No need to buy an expensive one, they run awesome without any mods.

way overpriced. mine q-jet is ancient and stock and it's been great.

also, don't forget about holley pro-jection as an option.

 

[Hogback Fabrication]

You dont have any problem with stalling when climbing hills or hitting bumps at higher speed with a Q-jet?

Nope. On our trip to Carnage in Buena Vista I managed to stall it but had it up and running again in short order. For the record, it was running until I killed it (since the rear end likes to hop so much ) and started back up again without too much effort.



I had broken the front right stub shaft and hub, so the front right wasn't spinning. And you can see that I was having some winch connection problems too

Here's some pictures of that same obstacle from another angle:

Just in case any of you guys are doubting that Q-jets run well at angles

 

[Hogback Fabrication]

n

also, don't forget about holley pro-jection as an option.

Oh god, run far far away from pro-jection. If somebody gave me a pro-jection setup for free, my Q-jet would stay on the truck.

 

[sta500666]

damn those pics were intence haha! that deffinatly gave me some more hope in a carb. I just wish one of the 2 I have were in good shape. Anyone know about how much it costs to get a Rochester Q-jet rebuilt?? I'd do it my self, but I dont trust myself with small screws... i tend to mess them up

By the way, whats wrong with the pro-jection?

 

[jonrpick]

Then you should start looking for a TBI set-up from a junk yard or paper.

You will need an intake, computer, wiring harness, and an external fuel pump.

An intake would be best, but you can run an adapter to run it on a 4bbl intake. In fact, I've talked to a few people who were running stock TBI'd 454s that said GM did it that way from the factory.

These folks have every carb/intake adapter known to man...

http://www.partsamerica.com/ProductListSimple.aspx?Category=3575Y

Also, don't forget...you'll need to weld a bung into an exhaust manifold for the O2 sensor, or get a different exhaust manifold from a TBI truck.

 

[lak2004]

n

Oh god, run far far away from pro-jection. If somebody gave me a pro-jection setup for free, my Q-jet would stay on the truck.

Why do you say that? Damnit I was thinking about going pro-jection

 

[vortec]

I just wish one of the 2 I have were in good shape. Anyone know about how much it costs to get a Rochester Q-jet rebuilt?? I'd do it my self, but I dont trust myself with small screws... i tend to mess them up

if you have two, you might as well try to rebuild one. if you mess up, you have another for a pro to do.

 

[Jrgunn5150]

Rebuilt units were priced at nearly 500 to over 500. The truck was my daily driver at the time, I wasn't interested in screwing around with junkyard carbs that may or may not have worked.

 

[Hogback Fabrication]

Why do you say that? Damnit I was thinking about going pro-jection

It doesn't run in closed loop i.e. they don't have an oxygen sensor and hence don't change the fuel mixture based on anything. If you change altitude, it will act just like a carb.

When we ran Holy Cross last year with Nate (ivie29, one of the CO guys who has projection) his truck died 5-10 times even though its an auto.

They do sell a kit to convert the system to closed loop but that involves spending more $$ (which I assume you are trying to avoid if you're considering projection in the first place).

Search for projection on any of the 4x4 sites, you won't find many people that like their projection. IMO, with a stock motor (or not much above stock power) the stock TBI is unbeatable.

 

[Hogback Fabrication]

Rebuilt units were priced at nearly 500 to over 500. The truck was my daily driver at the time, I wasn't interested in screwing around with junkyard carbs that may or may not have worked.

Here's a rebuilt Q-jet for $198:

http://www.partsamerica.com/ProductDetail.aspx?MfrCode=CHR&MfrPartNumber=3609&PartType=26&PTSet=A

I personally wouldn't trust anyone's rebuild, especially when the rebuild kit is maybe $20.

Using a junkyard carb could be hit or miss, but most are probably good. Unless the rods are bent or the top plate is warped, a rebuild kit (and making sure that its rediculously clean) should get it back in tip top shape.

 

[sta500666]

Well, possibly this winter I'll try rebuilding one of the rochesters, I dont have much time to untill then. I'm still toying with the idea of truck avenger or TPI, mostly to just gain some knowlege!!

 

[lak2004]

It doesn't run in closed loop i.e. they don't have an oxygen sensor and hence don't change the fuel mixture based on anything. If you change altitude, it will act just like a carb.

When we ran Holy Cross last year with Nate (ivie29, one of the CO guys who has projection) his truck died 5-10 times even though its an auto.

They do sell a kit to convert the system to closed loop but that involves spending more $$ (which I assume you are trying to avoid if you're considering projection in the first place).

Search for projection on any of the 4x4 sites, you won't find many people that like their projection. IMO, with a stock motor (or not much above stock power) the stock TBI is unbeatable.

I have been watching ebay for a pro-jection kit with the closed loop sensor and they go for around 400-700 depending on condition. I have seen a new kit on ebay for $790. I was trying to avoid the stock tbi setup for the fact I will be running a non stock setup in the future and to save on having chips burned and all that hassle of the stock computer. Is there something better that I should look at investing in?

Sorry to hijack but i too have the stupid 1406 and i hate it!

 

[Jrgunn5150]

Here's a rebuilt Q-jet for $198:

http://www.partsamerica.com/ProductDetail.aspx?MfrCode=CHR&MfrPartNumber=3609&PartType=26&PTSet=A

I personally wouldn't trust anyone's rebuild, especially when the rebuild kit is maybe $20.

Using a junkyard carb could be hit or miss, but most are probably good. Unless the rods are bent or the top plate is warped, a rebuild kit (and making sure that its rediculously clean) should get it back in tip top shape.

Damn, where were you two year's ago? Mine shows 224, but still waay less than Summit. Oh well, I have not had any trouble out of the Truck Avenger, but thanks for the link, now I know.

 

[sta500666]

Damn, where were you two year's ago? Mine shows 224, but still waay less than Summit. Oh well, I have not had any trouble out of the Truck Avenger, but thanks for the link, now I know.

would you rather run the truck avenger or a Q-jet?

 

[Jrgunn5150]

At the time I would have rather had a Qjet, I didn't feel like swapping intakes (I never mess with adapter's), and they really are great carbs when they are right.

Right now though, I really am happy with my Truck Avenger, and it does have some abilities a stock q-jet does not, like a one peice vent tube and spring loaded needle and seat.

 

[sta500666]

At the time I would have rather had a Qjet, I didn't feel like swapping intakes (I never mess with adapter's), and they really are great carbs when they are right.

Right now though, I really am happy with my Truck Avenger, and it does have some abilities a stock q-jet does not, like a one peice vent tube and spring loaded needle and seat.

I think I'm going to go with the truck avenger, I just need to find one at an alright price. I have an edelbrock performer manifold, I wonder if it will fit... Why dont you like adapters??