L8t 427 Whipple charged Denali

[CMoore711]

This is shaping up to be a great build!

I don't have any personal experience with TKR, but they're located about 30 mins south of me and have a very strong reputation for GM transmissions.
What year is your Denali?
Do you have the 8 speed or the 10 speed transmission?
Stall speed on the Circle D Billet Torque Converter?
L8T 427... I'm guessing you installed a stroker kit that bumped the displacement up to 7.0l from 6.6l? What stroker kit did you use to do this?
What are you using for heads on this L8T?

 

[WestTxDenali]

This is shaping up to be a great build!

I don't have any personal experience with TKR, but they're located about 30 mins south of me and have a very strong reputation for GM transmissions.
What year is your Denali?
Do you have the 8 speed or the 10 speed transmission?
Stall speed on the Circle D Billet Torque Converter?
L8T 427... I'm guessing you installed a stroker kit that bumped the displacement up to 7.0l from 6.6l? What stroker kit did you use to do this?
What are you using for heads on this L8T?

It’s an 8l90. I went with a 3k triple disc setup from circle d. The rotation assembly is all cali compstar stuff. Heads are a set of katech cnc ported stock casting heads. With the 59cc chamber it’ll be right at 10.8:1 so it should have some good grunt down low.

 

[WestTxDenali]

It’s an 8l90. I went with a 3k triple disc setup from circle d. The rotation assembly is all cali compstar stuff. Heads are a set of katech cnc ported stock casting heads. With the 59cc chamber it’ll be right at 10.8:1 so it should have some good grunt down low.

Also it’s a 2016

 

[randeez]

Fic lt4 30 over on the high side walbro 525 on the low side. Gpi cam has a 32 over fuel lobe and then a lt4 high side pump. Unfortunately there is no E85 close to me at all and with this being a daily driver driving 45 minutes to fill up isnt in the picture. It’ll be tuned on 91 pump gas. I’m hoping to see 700ish to the wheel with low boost.

search around on the hptuners forum...a lot of tuners not very happy with fic30%s
xdi injectors seem to be more favorable
no cam in my gen v, but likely going port injection (well am going port injection ive got the plates/injectors, just sorting out controller)

 

[WestTxDenali]

search around on the hptuners forum...a lot of tuners not very happy with fic30%s
xdi injectors seem to be more favorable
no cam in my gen v, but likely going port injection (well am going port injection ive got the plates/injectors, just sorting out controller)

I was heavily considering xdi however they are backordered like crazy and the tuner I use often isn’t a fan of their support. I was thinking of port injection but I think the 30% overs will be fine for what I have going on

 

[randeez]

I was heavily considering xdi however they are backordered like crazy and the tuner I use often isn’t a fan of their support. I was thinking of port injection but I think the 30% overs will be fine for what I have going on

gotcha, if your tuner is comfortable with them , then hopefully it all goes smooth.
if i were up for doing a cam now i would likely just do the DI stuff as well and not have to mess with additional stuff, avoiding meth for the same reason...this thing sits for a few weeks at a time i dont want to have to check abunch of stuff before i drive it every time.

 

[WestTxDenali]

gotcha, if your tuner is comfortable with them , then hopefully it all goes smooth.
if i were up for doing a cam now i would likely just do the DI stuff as well and not have to mess with additional stuff, avoiding meth for the same reason...this thing sits for a few weeks at a time i dont want to have to check abunch of stuff before i drive it every time.

That’s kinda my thinking also working out of town and having the wife daily it. Trying to keep the down low drivability as tame as possible and not overly complicated.

 

[koachdaddy]

Not to derail your thread, but could you tell me why you went with Whipple? I'm on the fence about the Whipple vs Magnuson and trying to ask the questions before making a decision.

 

[WestTxDenali]

Not to derail your thread, but could you tell me why you went with Whipple? I'm on the fence about the Whipple vs Magnuson and trying to ask the questions before making a decision.

The magnuson is awesome for sure. I ended up going with the whipple because it was on sale. I saved a good chunk of change on it.

 

[WestTxDenali]

Finally back from work and had an hour or two free to get some stuff taken care of. I ended up pinning the crank just to be safe with the whipple. All pushrods have been put in a the preload set for the Johnson racing tie bar lifters. Tomorrow or the next day I’ll end up finishing up with the long block and hopefully have it dropped in. I do still need to finish removing the from end to make running lines and what not easier.