gt42 What to do

[Norcaldrifter]

I just aquired a gt4294. Should I go single or compound it with the stock turbo? right now i have a stg. IV suncoast tranny and deep pan with t case brace. Im real close to finishing my lift pump setup. stock sticks and cp3. efi live installed.
I want to daily drive it. I do light towing of a race car 3000lbs plus tailer. Not looking for a tractor pulling truck just a fast street truck that can do its daily duty. looking to run low 11"s wich i think will be reasonable. Also no plans to forge the internals so stock block. So... compound or single?

 

[ripmf666]

Gt4294 is not for twinning and not going to make it to the low 12's. Also for the goal your looking for you will need some motor parts.

 

[Norcaldrifter]

Damn.. so single? the 4294 wont even get me into the 12's? Will it atleast max out the stock engine with fuel? How much power can i make with it? It was free and new so I wanna make the most of it...

 

[Righteyeblind]

Fill out your signature so we know what kind of truck you have and what mods.

This turbo is not good for a twin setup but will be fairly decent for a single. You will have to buy a pedestal, oil line kit and downpipe to make it work though. You will be able to run mid 12's with good tuning and can do it with stock cp3 and sticks. Running low 11's is going to take a lot more fuel and a lot more air and forged internals to hold all that. IMO I would sell that charger and get a different one if you could find a buyer.

 

[maine04max]

with a good efi tune you should be able to get into high 12's . getting into the low 11's is going to take some internal parts . if that turbo was a 4202 it would be a decent twin turbo , but iirc 4294 is a 70 mm inducer , kinda small for twins as the big guy

 

[Norcaldrifter]

So it would be a good daily single? Maybe 600-650 whp with lift pump and stg 2 wicked diesel cp3 with maybe 60% over sticks?

 

[Righteyeblind]

Id say 550 with stock cp3 and sticks and I wouldnt take it past that. You could put 30 or 40 over injectors but I wouldn't put more fuel then a stock cp3 and a lift pump with stock rods. People have said 60 over injectors are kind of big for DD. I do not have a personal experience on that though

 

[Norcaldrifter]

Ok so whats maxing the rods? I thought 700 was max on the stock engine i understand Ill need a better cp3 I was thinking an upgraded one with larger nozzles on the gt4095would be fun. Im sensing dissapontment from you guys.... I have a 83mm turbo I think Ill need to re-look up the part number.....

 

[paint94979]

Ok so whats maxing the rods? I thought 700 was max on the stock engine i understand Ill need a better cp3 I was thinking an upgraded one with larger nozzles on the gt4095would be fun. Im sensing dissapontment from you guys.... I have a 83mm turbo I think Ill need to re-look up the part number.....

On a GT4094R i ran 12.3's with a stock cp3 and LBZ regulator... at for the most part 6800lbs. A high 11 on stock rods is usually the limit some push it harder some are happy with 12.7's so it is all on what you want

 

[TheBac]

You'll bend those LB7 rods like wet noodles at 650rwhp. These engines arent bulletproof.

I'm more than a little surprised that a 4094 can only get a truck to 12.30s best, let alone a 4294.

 

[ripmf666]

The GT4294 will flow just a hair more then a Gt4094 so with tuning and fuel low 12's. I was running a GT4202R and twin cp3 and 30% with a built motor on a 11.53 @ 116.92 pass granted it was not the best tune or the truck was not setup for the run and I was sucking thru a 5" pipe cut down to 2 1/2" lol it takes more then throwing some parts on to get low 11's out of these truck's $$$$$$$$$ they break and cost alot to fix.

 

[paint94979]

You'll bend those LB7 rods like wet noodles at 650rwhp. These engines arent bulletproof.

I'm more than a little surprised that a 4094 can only get a truck to 12.30s best, let alone a 4294.

I have been at 650-670 for well over a year and lots of passes Tom... 650 is not what i would say the max based on personal experience. Tuning has a lot to do with it but we all know that. You say that a 12.3 with a 4094 isn't stong running? Your truck was gutted to the max and ran a 12.2 i could have dropped weight to 6500-6600 no doubt but screw that Once i went to the WD CP3 i ran many more 12.1's I am fairly sure my 4094 was a goofy one i couldn't ever pick up bottom end ET over the stock CP3 setup... maybe that is why my engine feels just fine to me?

 

[ripmf666]

Nick I think you just need to buy my truck. I will drop it off to you even. but make it this week I want to go and get one of these 2 trucks I found I like. Screw racing diesels keep a stock truck and get the car running again and start really going fast get some mid 7 sec pass @ 155 hehe :hug:

 

[paint94979]

Nick I think you just need to buy my truck. I will drop it off to you even. but make it this week I want to go and get one of these 2 trucks I found I like. Screw racing diesels keep a stock truck and get the car running again and start really going fast get some mid 7 sec pass @ 155 hehe :hug:

Henry diesel racing is stupid no doubt about that How much you want for it?

 

[MaxPowerLB7]

High elevens are doable with 4294 and a single C, depending on the trucks weight and traction. I pulled off an 11.75 fuel only with a modded LB7 regulator, stock injectors and a GT4202 at around 6200 lbs. Trent ran an 11.6x with I think a single factory Cp3 and twins with a comparable race weight.

 

[Norcaldrifter]

HMMMMM... ok I guess Ill keep the 4294 as it sounds like a decent daily turbo. Im gathering Its better than stock, and my stocker is on its last leg. So Im hoping now for a litle bit more power and lower egts.

 

[ChevyDieselLLY]

Just know you run the chance of lifting a head or bending a rod. These trucks aren't cheap to build. I've stop counting how much I've spent.

 

[Norcaldrifter]

Yea I was just thinking if I could put in a 4202 compressor wheel On and compound it with the Rebuilt stocker.... Or twin it with a 80mm inducer 108mm exducer turbo I have

 

[Redbowties88]

if i can do 12.5's stock i wold certainly think a 4294 would take you to the low 12's if not maybe squeek in some high 11's with fueling mods...

fair bit of difference in the maps

 

[ripmf666]

Yea I was just thinking if I could put in a 4202 compressor wheel On and compound it with the Rebuilt stocker....

Do you even know what the the a/r on the turbo in a twin it needs to be around 1.32 as a good single I like 1.00. Egts are hit and miss also watc the tuning our you could lift the heads.