Engine/Transmission (1998.5 - 2002) How much boost/stock injectors?

[CCamillo]

Just a quick question about how much boost can Irun with stock injectors? I was thinking about swapping to the HX35. I would do injectors now but money money money only have so much!

Thanks Guys!

 

[Midnite]

You could do the turbo now, but I don't think you'd be able to see any difference other than slightly more laggy spool-up since you're coming from an HY35. To take advantage of the extra air you'll need more fuel.

What kind of peak EGT and boost pressures are you currently seeing?

Mike

 

[CCamillo]

About 25 PSI and 1050-1100 EGT.

 

[ALepley]

About 25 PSI and 1050-1100 EGT.

Thats all the boost you can make? Something is wrong there. I boost like 42psi easy. Granted I have 110 injectors but even before I put in the injectors I was building all but 35psi.

 

[Midnite]

25 psi is about right for a stock truck with a mild box. I'm not familiar with the Quad XZT box, but I'm assuming it doesn't tap the pump wire.

Mike

 

[ALepley]

25 psi is about right for a stock truck with a mild box. I'm not familiar with the Quad XZT box, but I'm assuming it doesn't tap the pump wire.



Mike

Thats true. Im used to my edge hahaha. Cant go wrong with an edge box

 

[CCamillo]

The box just plugs into the data port below the filter bowl. Today I was watching and my egts were 800 going 70mph at about 2,000 rpm. Wot was around 950 with 25 psi. Can I get more boost out of the hy35/ If so how? I have a Jhook and I keep hearing about this turnbuckle but not sure how it hooks up. Any suggestions would be great. TIA

Chris

 

[THoltz]

I get 22 psi max boost as measure by my Autometer boost gauge, my edge does tap the pump wire. I think if you are getting 25, your stock turbo is max'd out.

 

[darkhorse]

The HX 35 & I would presume the HY as well, should be limited to about 35 psi. More pressure is counter productive.

 

[ceastmen]

CCamillo I have almost identical setup as you do and get 26 psi.

I feel that the Quad XZT is starting to de-fuel at that point.

My truck runs well here in Colorado I've pulled some of the passes at way over the speed limit with EGT's at 1200-1250 after a long climbs.

For me the EGT's are tolerable, more power would need more money to bring down the EGT's.

Chuck

 

[fest3er]

The HX-35 runs out of its efficiency map around 30 PSI. Any boost created after that is more from heating the charge air rather than compressing it. Dunno about the HY-35; I suspect it might be similar.