When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Well I bit the bullet and bought a cx racing kit for my silverado, the kit looks fairly decent. It's a 76mm, so this weekend I'll begin the work. This will be my first turbo build. I'll be removing all the nitrous stuff this weekend and probably get my second fuel pump hooked up and then we'll go from there. I have 2 aeromotive 340 pumps, FIC 80 lb 850cc- truck injectors, and a hobbs switch. I'll post some pictures when i get started, also im removing the 410 gears and installing 342 gears, any thoughts or suggestions would be appreciated.
If your gonna go cxracing atleast upgrade to a larger turbo. Most if not all cx racing kits come with there 76mm turbo with the 65mm turbine. It's too small. Do yourself a favor and start with 7875 atleast.
If your gonna go cxracing atleast upgrade to a larger turbo. Most if not all cx racing kits come with there 76mm turbo with the 65mm turbine. It's too small. Do yourself a favor and start with 7875 atleast.
it's .81 ar turbine 4" Air Inlet - 2.5" Compressed Air Outlet - Wet Floating Bearings - Oil Cooled - 1/8" NPT Feeding. M8 x1.25 Return Flange Mounting Screws - Standard T4 Flange - 500-800 HP - 76mm Wheel Compressor - P Trim .81 A/R Turbine - 102.4mm/76.7 Compressor Wheel - 74.1mm/64.6mm - 3" V-band Hot Side
Last edited by Tommy42088; Aug 9, 2023 at 01:13 PM.
it's .81 ar turbine 4" Air Inlet - 2.5" Compressed Air Outlet - Wet Floating Bearings - Oil Cooled - 1/8" NPT Feeding. M8 x1.25 Return Flange Mounting Screws - Standard T4 Flange - 500-800 HP - 76mm Wheel Compressor - P Trim .81 A/R Turbine - 102.4mm/76.7 Compressor Wheel - 74.1mm/64.6mm - 3" V-band Hot Side
That's the small 65mm turbine, Jordoza is right, you can use it, it'll spool super-fast and tap out early but you can always bolt in a 7875 later on.
The billet 7875 from VS Racing is a nice unit and will make way more power.
That's the small 65mm turbine, Jordoza is right, you can use it, it'll spool super-fast and tap out early but you can always bolt in a 7875 later on.
The billet 7875 from VS Racing is a nice unit and will make way more power.
I just got those specs from online, I'm pretty sure that's the specs but I'm not 100 percent sure. I'm sure is 76mm tho, the turbo definitely doesn't look small. Ill probably just try it out and see how it does and if i dont like it ill switch it out for something else. My goal is 700 rwhp, anything less then 600 and ill be disappointed.
That's what I would do, it comes with the kit so run it and see how close it gets you, it costs you nothing.
I seriously doubt it'll get you to 700whp but the torque it'll make will definitely put a smile on your face.
You can always drop a billet 7875 in later and go for more.
I made 700whp with an old Turbonetics cast wheel 7875 through a six-speed manual trans so 700whp with a billet wheel 7875 through a power sucking automatic might be a stretch depending on what fuel you're using.
That's what I would do, it comes with the kit so run it and see how close it gets you, it costs you nothing.
I seriously doubt it'll get you to 700whp but the torque it'll make will definitely put a smile on your face.
You can always drop a billet 7875 in later and go for more.
I made 700whp with an old Turbonetics cast wheel 7875 through a six-speed manual trans so 700whp with a billet wheel 7875 through a power sucking automatic might be a stretch depending on what fuel you're using.
the truck makes 400 NA, it's on a 200 shot now as well but ill definitely be removing the nitrous. If my track numbers are better then it is on the bottle ill be happy. I have 2 aeromotive 340 pumps, FIC 80 pound 850 cc injectors, aeromotive regulator, PTFE feed and return lines on E85
the truck makes 400 NA, it's on a 200 shot now as well but ill definitely be removing the nitrous. If my track numbers are better then it is on the bottle ill be happy. I have 2 aeromotive 340 pumps, FIC 80 pound 850 cc injectors, aeromotive regulator, PTFE feed and return lines on E85
Oh nice, you should be able to hit 700whp or at least get damn close with E85 and a 7875 turbo.
Just remember, the 200 shot of nitrous also adds 250 lb./ft. of torque at the hit so the turbo won't hit as hard initially but once it spools up it'll pull like a freight train.
I would strongly suggest some kind of electronic boost controller as well, it brings the boost in much faster and linear.
Be curious to see if you have enough pump/injectors for 700whp on E85, I don't have it out west, so I don't have any experience with it.
All gonna depend on how quickly that turbine chokes up.
Oh nice, you should be able to hit 700whp or at least get damn close with E85 and a 7875 turbo.
Just remember, the 200 shot of nitrous also adds 250 lb./ft. of torque at the hit so the turbo won't hit as hard initially but once it spools up it'll pull like a freight train.
I would strongly suggest some kind of electronic boost controller as well, it brings the boost in much faster and linear.
Be curious to see if you have enough pump/injectors for 700whp on E85, I don't have it out west, so I don't have any experience with it.
All gonna depend on how quickly that turbine chokes up.
According to aeromotive 1 pump is rated for 490 forced Induction on e85, and the guy who tunes my truck told me to get 80 lb injectors and that would get me to my goal. He's pretty familiar with my truck, I always use the same guy to do my tuning. He owns a pretty well known shop around my town and they build so pretty fast rides. For 600$ I hope the injectors are enough. This is the injectors i have
Oh nice, you should be able to hit 700whp or at least get damn close with E85 and a 7875 turbo.
Just remember, the 200 shot of nitrous also adds 250 lb./ft. of torque at the hit so the turbo won't hit as hard initially but once it spools up it'll pull like a freight train.
I would strongly suggest some kind of electronic boost controller as well, it brings the boost in much faster and linear.
Be curious to see if you have enough pump/injectors for 700whp on E85, I don't have it out west, so I don't have any experience with it.
All gonna depend on how quickly that turbine chokes up.
I have two aeromotive 340's and 80lb injectors and on 20-22psi boost i'm at 99% duty cycle on pump gas. If he runs e85, those 80's aint gonna cut it.
According to aeromotive 1 pump is rated for 490 forced Induction on e85, and the guy who tunes my truck told me to get 80 lb injectors and that would get me to my goal. He's pretty familiar with my truck, I always use the same guy to do my tuning. He owns a pretty well known shop around my town and they build so pretty fast rides. For 600$ I hope the injectors are enough. This is the injectors i have
I hate to say it, but I think KFXGuy is right.
I currently run FIC1000cc injectors, aftermarket rails, twin Walbro 450 pumps with an -08 AN feed and -06AN return on pump gas only, at 15 lbs. with my S484 I'm at 80% duty cycle which with my setup should be just over 700whp through my TH400 at the very least.
E85 typically will require at least 30% more fuel volume and those pumps flow will taper down as boost increases.
Last thing you want is to be on the ragged edge of what your fuel system can supply.
This is just me, but I'd sell the 340's, get a pair of 450's or external 380's (they taper off less w/ boost), sell the FIC 80's and buy some Bosch 210's.
At minimum you'll need a -08AN feed but ideally -10AN would be best with -08AN return at least.
I hate to say it, but I think KFXGuy is right.
I currently run FIC1000cc injectors, aftermarket rails, twin Walbro 450 pumps with an -08 AN feed and -06AN return on pump gas only, at 15 lbs. with my S484 I'm at 80% duty cycle which with my setup should be just over 700whp through my TH400 at the very least.
E85 typically will require at least 30% more fuel volume and those pumps flow will taper down as boost increases.
Last thing you want is to be on the ragged edge of what your fuel system can supply.
This is just me, but I'd sell the 340's, get a pair of 450's or external 380's (they taper off less w/ boost), sell the FIC 80's and buy some Bosch 210's.
At minimum you'll need a -08AN feed but ideally -10AN would be best with -08AN return at least.
man I just bought those injectors from huron speed a few days ago, maybe they will let me trade them in for something different because I haven't even opened them. And I had walbro pumps before the 340 and they went out on me way to fast so that's why I got rid of them. I have aftermarket rails as well. I'll call huron speed though and see if they can work something out with me.
man I just bought those injectors from huron speed a few days ago, maybe they will let me trade them in for something different because I haven't even opened them. And I had walbro pumps before the 340 and they went out on me way to fast so that's why I got rid of them. I have aftermarket rails as well. I'll call huron speed though and see if they can work something out with me.
On the pumps, you gotta make sure they are genuine Walbro units, there are so many fake copies out there its ridiculous.
Ideally although not cost effective would be to keep one of the 340's in the tank and run a Weldon external fuel pump on a hobbs.
They aren't cheap but when it comes time to want more power (which you will lol) you'll have all the fuel supply you'll need.
That's my plan when I move to another state with E85, keep a 450 in the tank and run something like a Waldon D2035-A external pump.
Jon at Huron Speed is a great guy to deal with, just let him know you were misled about what injectors you needed, he probably has the Bosch 210's on the shelf as well.
On the pumps, you gotta make sure they are genuine Walbro units, there are so many fake copies out there its ridiculous.
Ideally although not cost effective would be to keep one of the 340's in the tank and run a Weldon external fuel pump on a hobbs.
They aren't cheap but when it comes time to want more power (which you will lol) you'll have all the fuel supply you'll need.
That's my plan when I move to another state with E85, keep a 450 in the tank and run something like a Waldon D2035-A external pump.
Jon at Huron Speed is a great guy to deal with, just let him know you were misled about what injectors you needed, he probably has the Bosch 210's on the shelf as well.
I just emailed the sales email that's on there site, that's the only contact information I have on huron speed and ok if i did run an external pump how how i go about doing that? Do i have to run a new line to do that or do I just put it in the middle of my existing feed line?
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.
Turbo silverado 
