No more big turbo on the little engine!! So far I've had a MP70 with a .81 a/r, made 617/623@ 15psi with manual, went 11.33@122 at 18psi (auto). Then with the PTE 76GTS .96 a/r went 10.88@125 at 18psi and then 10.75@127 with dry 50 added.

Next snail I hope will run around 128-129 at 10.5's @ 20psi and spool a little earlier to help get the boat down the road... Any guesses? Hint it's a Magnum turbo...

Couple shots

 

Spill the beans foose

 

Magnum...t72 ball bearing?? any plans on doing anything else to the motor? Right now your just running ls9 gaskets arp head bolts and a ls6 cam right?

 

Bingo, went with a 72mm/ Q-trim, .96, but JB...hope it fits the bill.

 

My buddy bought that turbo for his 408 lol. Let us know how that turbo works for ya I might get one of those if they do better than the mp76

 

Sweet! I've got the Magnum 72mm BB on my truck and it spools nice!

 

I plan to swap out ls6 springs. I likely never got to see the real power the 76gts had because of the light seat pressure. I think after about 13-15psi area their done. Other then that though, same setup and correct on the arps and cam.

 

I think you're going to see a nice change just from springs alone

 

Kyle how many pounds you pushing and how's old butt dyno feedback?

Regcab, he should be able really use the gts on that 408, not keep it sleeping like I was!

 

Took it to the 1/8 last weekend, am just running 10psi right now but it feels pretty good. Could brake boost all 10psi off the line. Gonna crank it up and see what it will do in a few weeks. This forged motor is getting pretty long in the tooth and noisy... Time for a nice quiet stock motor, to boost the crap out of Still have the Stock 4.8, just needs head gaskets and studs!!